docs: Edit logo size

BREAKING CHANGE: `ValueManifest` and `ConfigValue` added a new type "UNIT" to mark the minimal unit value of this instance.

link #132

.gitignore

@@ -1,3 +1,4 @@
-.idea/
+.idea/*
+!.idea/icon.svg
 **/target/
 **.iml

README.md

@@ -11,7 +11,9 @@
 README LANGUAGES [ [**English**](README.md) | [中文](README_CN.md)  ]
 </div>
 
-# configured (config-framework)
+# configured _(config framework)_
+
+<img src=".doc/images/logo-bg.svg" width="150px" alt="logo" align="right" style="float: right"/>
 
 _**"Once set, Simple get."**_
 
@@ -37,7 +39,7 @@ For the latest JavaDoc release, [CLICK HERE](https://CarmJos.github.io/configure
 
 For a detailed development guide, [CLICK HERE](.doc/README.md).
 
-### Code Samples
+### Preview
 
 To quickly demonstrate the applicability of the project, here are a few practical demonstrations:
 

README_CN.md

@@ -12,7 +12,9 @@ README LANGUAGES [ [English](README.md) | [**中文**](README_CN.md)  ]
 
 </div>
 
-# configured (config-framework)
+# configured _(配置文件框架)_
+
+<img src=".doc/images/logo-bg.svg" width="150px" alt="logo" align="right" style="float: right"/>
 
 **一次配置，轻松读取！**
 

core/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>configured-parent</artifactId>
         <groupId>cc.carm.lib</groupId>
-        <version>4.1.0</version>
+        <version>4.1.2</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <properties>

core/src/main/java/cc/carm/lib/configuration/adapter/ValueAdapter.java

@@ -15,6 +15,7 @@ public class ValueAdapter<TYPE>
         implements ValueSerializer<TYPE>, ValueParser<TYPE> {
 
     protected final @NotNull ValueType<TYPE> type;
+
     protected @Nullable ValueSerializer<TYPE> serializer;
     protected @Nullable ValueParser<TYPE> deserializer;
 
@@ -53,13 +54,21 @@ public class ValueAdapter<TYPE>
     }
 
     @Override
-    public Object serialize(@NotNull ConfigurationHolder<?> holder, @NotNull ValueType<? super TYPE> type, @NotNull TYPE value) throws Exception {
+    public @Nullable Object serialize(
+            @NotNull ConfigurationHolder<?> holder,
+            @NotNull ValueType<? super TYPE> type,
+            @NotNull TYPE value
+    ) throws Exception {
         if (serializer == null) throw new UnsupportedOperationException("Serializer is not supported");
         return serializer.serialize(holder, type, value);
     }
 
     @Override
-    public TYPE parse(@NotNull ConfigurationHolder<?> holder, @NotNull ValueType<? super TYPE> type, @NotNull Object value) throws Exception {
+    public @Nullable TYPE parse(
+            @NotNull ConfigurationHolder<?> holder,
+            @NotNull ValueType<? super TYPE> type,
+            @NotNull Object value
+    ) throws Exception {
         if (deserializer == null) throw new UnsupportedOperationException("Deserializer is not supported");
         return deserializer.parse(holder, type, value);
     }

core/src/main/java/cc/carm/lib/configuration/adapter/ValueAdapterRegistry.java

@@ -2,7 +2,6 @@ package cc.carm.lib.configuration.adapter;
 
 import cc.carm.lib.configuration.function.DataFunction;
 import cc.carm.lib.configuration.source.ConfigurationHolder;
-import org.jetbrains.annotations.Contract;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -61,7 +60,9 @@ public class ValueAdapterRegistry {
         }
     }
 
-    public <T> void register(@NotNull ValueType<T> type, @Nullable ValueSerializer<T> serializer, @Nullable ValueParser<T> deserializer) {
+    public <T> void register(@NotNull ValueType<T> type,
+                             @Nullable ValueSerializer<T> serializer,
+                             @Nullable ValueParser<T> deserializer) {
         if (serializer == null && deserializer == null) return;
         ValueAdapter<T> existing = adapterOf(type);
         if (existing != null) {
@@ -82,7 +83,9 @@ public class ValueAdapterRegistry {
 
     @SuppressWarnings("unchecked")
     public <T> @Nullable ValueAdapter<T> adapterOf(@NotNull ValueType<T> type) {
-        ValueAdapter<?> matched = adapters.stream().filter(adapter -> adapter.type().equals(type)).findFirst().orElse(null);
+        ValueAdapter<?> matched = adapters.stream()
+                .filter(adapter -> adapter.type().equals(type))
+                .findFirst().orElse(null);
         if (matched != null) return (ValueAdapter<T>) matched;
 
         // If no adapter found, try to find the adapter for the super type
@@ -99,12 +102,10 @@ public class ValueAdapterRegistry {
         return adapterOf(ValueType.of(type));
     }
 
-    @Contract("_,_,null -> null")
     public <T> T deserialize(@NotNull ConfigurationHolder<?> holder, @NotNull Class<T> type, @Nullable Object source) throws Exception {
         return deserialize(holder, ValueType.of(type), source);
     }
 
-    @Contract("_,_,null -> null")
     public <T> T deserialize(@NotNull ConfigurationHolder<?> holder, @NotNull ValueType<T> type, @Nullable Object source) throws Exception {
         if (source == null) return null; // Null check
         if (type.isInstance(source)) return type.cast(source); // Not required to deserialize
@@ -113,7 +114,7 @@ public class ValueAdapterRegistry {
         return adapter.parse(holder, type, source);
     }
 
-    @Contract("_,null -> null")
+    @Nullable
     public <T> Object serialize(@NotNull ConfigurationHolder<?> holder, @Nullable T value) throws Exception {
         if (value == null) return null; // Null check
         ValueType<T> type = ValueType.of(value);

core/src/main/java/cc/carm/lib/configuration/adapter/ValueParser.java

@@ -2,6 +2,7 @@ package cc.carm.lib.configuration.adapter;
 
 import cc.carm.lib.configuration.source.ConfigurationHolder;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 /**
  * Value deserializer, convert base data to target value.
@@ -11,7 +12,7 @@ import org.jetbrains.annotations.NotNull;
 @FunctionalInterface
 public interface ValueParser<TYPE> {
 
-    TYPE parse(
+    @Nullable TYPE parse(
             @NotNull ConfigurationHolder<?> holder,
             @NotNull ValueType<? super TYPE> type, @NotNull Object data
     ) throws Exception;

core/src/main/java/cc/carm/lib/configuration/adapter/ValueSerializer.java

@@ -2,6 +2,7 @@ package cc.carm.lib.configuration.adapter;
 
 import cc.carm.lib.configuration.source.ConfigurationHolder;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
 
 /**
  * Value serializer, convert target value to base data.
@@ -11,7 +12,7 @@ import org.jetbrains.annotations.NotNull;
 @FunctionalInterface
 public interface ValueSerializer<TYPE> {
 
-    Object serialize(
+    @Nullable Object serialize(
             @NotNull ConfigurationHolder<?> holder,
             @NotNull ValueType<? super TYPE> type, @NotNull TYPE value
     ) throws Exception;

core/src/main/java/cc/carm/lib/configuration/adapter/ValueType.java

@@ -5,7 +5,6 @@ import org.jetbrains.annotations.NotNull;
 import java.lang.reflect.ParameterizedType;
 import java.lang.reflect.Type;
 import java.util.List;
-import java.util.Map;
 import java.util.Objects;
 
 /**
@@ -56,10 +55,14 @@ public abstract class ValueType<T> {
         };
     }
 
-    public static <T> ValueType<T> of(final Class<T> clazz) {
+    public static <T> ValueType<T> of(final @NotNull Class<T> clazz) {
         return of((Type) clazz);
     }
 
+    public static <T> ValueType<List<T>> ofList(final @NotNull Class<T> paramType) {
+        return of(List.class, paramType);
+    }
+
     /**
      * Get the generic type of the complex type.
      *

core/src/main/java/cc/carm/lib/configuration/adapter/strandard/StandardAdapters.java

@@ -5,6 +5,8 @@ import cc.carm.lib.configuration.adapter.ValueType;
 import cc.carm.lib.configuration.source.section.ConfigureSection;
 import org.jetbrains.annotations.NotNull;
 
+import java.util.UUID;
+
 import static cc.carm.lib.configuration.adapter.strandard.PrimitiveAdapter.*;
 
 public interface StandardAdapters {
@@ -17,6 +19,12 @@ public interface StandardAdapters {
 
     @NotNull ValueAdapter<Enum<?>> ENUMS = PrimitiveAdapter.ofEnum();
 
+    @NotNull ValueAdapter<UUID> UUID = new ValueAdapter<>(
+            ValueType.of(UUID.class),
+            (provider, type, value) -> value.toString(),
+            (provider, type, value) -> java.util.UUID.fromString(value.toString())
+    );
+
     @NotNull ValueAdapter<ConfigureSection> SECTIONS = new ValueAdapter<>(
             ValueType.of(ConfigureSection.class),
             (provider, type, value) -> value,

core/src/main/java/cc/carm/lib/configuration/builder/AbstractConfigBuilder.java

@@ -1,21 +1,26 @@
 package cc.carm.lib.configuration.builder;
 
 import cc.carm.lib.configuration.adapter.ValueType;
+import cc.carm.lib.configuration.function.DataValidator;
+import cc.carm.lib.configuration.function.ValueValidator;
 import cc.carm.lib.configuration.source.ConfigurationHolder;
 import cc.carm.lib.configuration.source.meta.ConfigurationMetaHolder;
 import cc.carm.lib.configuration.source.meta.ConfigurationMetadata;
 import cc.carm.lib.configuration.value.ConfigValue;
 import cc.carm.lib.configuration.value.ValueManifest;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.NotNullByDefault;
 import org.jetbrains.annotations.Nullable;
 
 import java.util.function.BiConsumer;
 import java.util.function.Consumer;
+import java.util.function.Predicate;
 import java.util.function.Supplier;
 
+@NotNullByDefault
 public abstract class AbstractConfigBuilder<
-        TYPE, RESULT extends ConfigValue<TYPE>, HOLDER extends ConfigurationHolder<?>,
-        SELF extends AbstractConfigBuilder<TYPE, RESULT, HOLDER, SELF>
+        TYPE, UNIT, RESULT extends ConfigValue<TYPE, UNIT>, HOLDER extends ConfigurationHolder<?>,
+        SELF extends AbstractConfigBuilder<TYPE, UNIT, RESULT, HOLDER, SELF>
         > {
 
     protected final Class<? super HOLDER> providerClass;
@@ -24,6 +29,7 @@ public abstract class AbstractConfigBuilder<
     protected @Nullable HOLDER holder;
     protected @Nullable String path;
 
+    protected @NotNull ValueValidator<UNIT> valueValidator = ValueValidator.none();
     protected @NotNull Supplier<@Nullable TYPE> defaultValueSupplier = () -> null;
     protected @NotNull BiConsumer<ConfigurationHolder<?>, String> initializer = (h, p) -> {
     };
@@ -37,54 +43,121 @@ public abstract class AbstractConfigBuilder<
         return type;
     }
 
-    protected abstract @NotNull SELF self();
+    protected abstract SELF self();
 
     public abstract @NotNull RESULT build();
 
-    public @NotNull SELF holder(@Nullable HOLDER holder) {
+    public SELF holder(@Nullable HOLDER holder) {
         this.holder = holder;
         return self();
     }
 
-    public @NotNull SELF path(@Nullable String path) {
+    public SELF path(@Nullable String path) {
         this.path = path;
         return self();
     }
 
-    public @NotNull SELF initializer(@NotNull BiConsumer<ConfigurationHolder<?>, String> initializer) {
+    /**
+     * Set the {@link ValueValidator} for the value.
+     *
+     * @param validator The validator to set.
+     * @return this builder
+     */
+    public SELF validator(@NotNull ValueValidator<UNIT> validator) {
+        this.valueValidator = validator;
+        return self();
+    }
+
+    /**
+     * Set the {@link DataValidator} for the value.
+     *
+     * @param validator The validator to set.
+     * @return this builder
+     */
+    public SELF validator(@NotNull DataValidator<? super UNIT> validator) {
+        return validator((h, value) -> validator.validate(value));
+    }
+
+    /**
+     * Validate the value with the specified condition.
+     *
+     * @param validator The validator to append.
+     * @return this builder
+     */
+    public SELF validate(@NotNull ValueValidator<? super UNIT> validator) {
+        return validator(this.valueValidator.and(validator));
+    }
+
+    /**
+     * Validate the value with the specified condition.
+     *
+     * @param validator The validator to append.
+     * @return this builder
+     */
+    public SELF validate(@NotNull DataValidator<? super UNIT> validator) {
+        return validate((h, value) -> validator.validate(value));
+    }
+
+    /**
+     * Validate the value with the specified condition.
+     *
+     * @param condition The condition to check, if the condition is false, an exception will be thrown.
+     * @param exception The exception to throw if the condition is false.
+     * @return this builder
+     */
+    public SELF validate(@NotNull Predicate<? super UNIT> condition, @NotNull Exception exception) {
+        return validate((h, value) -> {
+            if (!condition.test(value)) throw exception;
+        });
+    }
+
+    /**
+     * Validate the value with the specified condition.
+     *
+     * @param condition The condition to check, if the condition is false, an exception will be thrown.
+     * @param msg       The message to throw if the condition is false.
+     * @return this builder
+     */
+    public SELF validate(@NotNull Predicate<? super UNIT> condition, @NotNull String msg) {
+        return validate((h, value) -> {
+            if (!condition.test(value)) throw new IllegalArgumentException(msg);
+        });
+    }
+
+    public SELF initializer(@NotNull BiConsumer<ConfigurationHolder<?>, String> initializer) {
         this.initializer = initializer;
         return self();
     }
 
-    public @NotNull SELF append(@NotNull BiConsumer<ConfigurationHolder<?>, String> initializer) {
+    public SELF append(@NotNull BiConsumer<ConfigurationHolder<?>, String> initializer) {
         return initializer(initializer.andThen(initializer));
     }
 
-    public @NotNull SELF append(@NotNull Consumer<ConfigurationHolder<?>> initializer) {
+    public SELF append(@NotNull Consumer<ConfigurationHolder<?>> initializer) {
         return append((provider, valuePath) -> initializer.accept(provider));
     }
 
-    public @NotNull SELF defaults(@Nullable TYPE defaultValue) {
+    public SELF defaults(@Nullable TYPE defaultValue) {
         return defaults(() -> defaultValue);
     }
 
-    public @NotNull SELF defaults(@NotNull Supplier<@Nullable TYPE> supplier) {
+    public SELF defaults(@NotNull Supplier<@Nullable TYPE> supplier) {
         this.defaultValueSupplier = supplier;
         return self();
     }
 
-    public <M> @NotNull SELF meta(@NotNull Consumer<@NotNull ConfigurationMetaHolder> metaConsumer) {
+    public SELF meta(@NotNull Consumer<@NotNull ConfigurationMetaHolder> metaConsumer) {
         return append((h, p) -> metaConsumer.accept(h.metadata(p)));
     }
 
-    public <M> @NotNull SELF meta(@NotNull ConfigurationMetadata<M> type, @Nullable M value) {
+    public <M> SELF meta(@NotNull ConfigurationMetadata<M> type, @Nullable M value) {
         return meta(h -> h.set(type, value));
     }
 
-    protected @NotNull ValueManifest<TYPE> buildManifest() {
+    protected @NotNull ValueManifest<TYPE, UNIT> buildManifest() {
         return new ValueManifest<>(
-                type(), this.defaultValueSupplier, this.initializer,
-                this.holder, this.path
+                type(), this.defaultValueSupplier, this.valueValidator,
+                this.initializer, this.holder, this.path
         );
     }
 

core/src/main/java/cc/carm/lib/configuration/builder/CommonConfigBuilder.java

@@ -4,8 +4,11 @@ import cc.carm.lib.configuration.adapter.ValueType;
 import cc.carm.lib.configuration.source.ConfigurationHolder;
 import cc.carm.lib.configuration.value.ConfigValue;
 
-public abstract class CommonConfigBuilder<TYPE, RESULT extends ConfigValue<TYPE>, SELF extends CommonConfigBuilder<TYPE, RESULT, SELF>>
-        extends AbstractConfigBuilder<TYPE, RESULT, ConfigurationHolder<?>, SELF> {
+public abstract class CommonConfigBuilder<
+        TYPE, UNIT,
+        RESULT extends ConfigValue<TYPE, UNIT>,
+        SELF extends CommonConfigBuilder<TYPE, UNIT, RESULT, SELF>
+        > extends AbstractConfigBuilder<TYPE, UNIT, RESULT, ConfigurationHolder<?>, SELF> {
 
     protected CommonConfigBuilder(ValueType<TYPE> type) {
         super(ConfigurationHolder.class, type);

core/src/main/java/cc/carm/lib/configuration/builder/impl/AbstractSectionBuilder.java

@@ -4,7 +4,7 @@ import cc.carm.lib.configuration.adapter.ValueAdapter;
 import cc.carm.lib.configuration.adapter.ValueType;
 import cc.carm.lib.configuration.builder.CommonConfigBuilder;
 import cc.carm.lib.configuration.function.DataFunction;
-import cc.carm.lib.configuration.function.ValueConsumer;
+import cc.carm.lib.configuration.function.ValueComposer;
 import cc.carm.lib.configuration.function.ValueHandler;
 import cc.carm.lib.configuration.source.section.ConfigureSection;
 import cc.carm.lib.configuration.value.ConfigValue;
@@ -14,45 +14,45 @@ import java.util.LinkedHashMap;
 import java.util.Map;
 
 public abstract class AbstractSectionBuilder<
-        TYPE, PARAM,
-        RESULT extends ConfigValue<TYPE>,
-        SELF extends AbstractSectionBuilder<TYPE, PARAM, RESULT, SELF>
-        > extends CommonConfigBuilder<TYPE, RESULT, SELF> {
+        TYPE, UNIT,
+        RESULT extends ConfigValue<TYPE, UNIT>,
+        SELF extends AbstractSectionBuilder<TYPE, UNIT, RESULT, SELF>
+        > extends CommonConfigBuilder<TYPE, UNIT, RESULT, SELF> {
 
 
-    protected final @NotNull ValueType<PARAM> paramType;
+    protected final @NotNull ValueType<UNIT> paramType;
 
-    protected @NotNull ValueHandler<ConfigureSection, PARAM> parser;
-    protected @NotNull ValueHandler<PARAM, ? extends Map<String, Object>> serializer;
+    protected @NotNull ValueHandler<ConfigureSection, UNIT> parser;
+    protected @NotNull ValueHandler<UNIT, ? extends Map<String, Object>> serializer;
 
-    protected AbstractSectionBuilder(@NotNull ValueType<TYPE> type, @NotNull ValueType<PARAM> paramType,
-                                     @NotNull ValueHandler<ConfigureSection, PARAM> parser,
-                                     @NotNull ValueHandler<PARAM, ? extends Map<String, Object>> serializer) {
+    protected AbstractSectionBuilder(@NotNull ValueType<TYPE> type, @NotNull ValueType<UNIT> paramType,
+                                     @NotNull ValueHandler<ConfigureSection, UNIT> parser,
+                                     @NotNull ValueHandler<UNIT, ? extends Map<String, Object>> serializer) {
         super(type);
         this.paramType = paramType;
         this.parser = parser;
         this.serializer = serializer;
     }
 
-    public @NotNull SELF parse(@NotNull DataFunction<ConfigureSection, PARAM> valueParser) {
+    public @NotNull SELF parse(@NotNull DataFunction<ConfigureSection, UNIT> valueParser) {
         return parse((p, section) -> valueParser.handle(section));
     }
 
-    public @NotNull SELF parse(@NotNull ValueHandler<ConfigureSection, PARAM> valueParser) {
+    public @NotNull SELF parse(@NotNull ValueHandler<ConfigureSection, UNIT> valueParser) {
         this.parser = valueParser;
         return self();
     }
 
-    public @NotNull SELF serialize(@NotNull ValueHandler<PARAM, ? extends Map<String, Object>> serializer) {
+    public @NotNull SELF serialize(@NotNull ValueHandler<UNIT, ? extends Map<String, Object>> serializer) {
         this.serializer = serializer;
         return self();
     }
 
-    public @NotNull SELF serialize(@NotNull DataFunction<PARAM, ? extends Map<String, Object>> serializer) {
+    public @NotNull SELF serialize(@NotNull DataFunction<UNIT, ? extends Map<String, Object>> serializer) {
         return serialize((p, value) -> serializer.handle(value));
     }
 
-    public @NotNull SELF serialize(@NotNull ValueConsumer<Map<String, Object>, PARAM> serializer) {
+    public @NotNull SELF serialize(@NotNull ValueComposer<Map<String, Object>, UNIT> serializer) {
         return serialize((h, value) -> {
             Map<String, Object> map = new LinkedHashMap<>();
             serializer.accept(h, map, value);
@@ -60,7 +60,7 @@ public abstract class AbstractSectionBuilder<
         });
     }
 
-    protected ValueAdapter<PARAM> buildAdapter() {
+    protected ValueAdapter<UNIT> buildAdapter() {
         return new ValueAdapter<>(this.paramType)
                 .parser((p, type, data) -> {
                     ConfigureSection section = p.deserialize(ConfigureSection.class, data);

core/src/main/java/cc/carm/lib/configuration/builder/impl/AbstractSourceBuilder.java

@@ -9,19 +9,19 @@ import cc.carm.lib.configuration.value.ConfigValue;
 import org.jetbrains.annotations.NotNull;
 
 public abstract class AbstractSourceBuilder<
-        V, SOURCE, PARAM, RESULT extends ConfigValue<V>,
-        SELF extends AbstractSourceBuilder<V, SOURCE, PARAM, RESULT, SELF>
-        > extends CommonConfigBuilder<V, RESULT, SELF> {
+        V, SOURCE, UNIT, RESULT extends ConfigValue<V, UNIT>,
+        SELF extends AbstractSourceBuilder<V, SOURCE, UNIT, RESULT, SELF>
+        > extends CommonConfigBuilder<V, UNIT, RESULT, SELF> {
 
     protected final @NotNull ValueType<SOURCE> sourceType;
-    protected final @NotNull ValueType<PARAM> paramType;
-    protected @NotNull ValueHandler<SOURCE, PARAM> valueParser;
-    protected @NotNull ValueHandler<PARAM, SOURCE> valueSerializer;
+    protected final @NotNull ValueType<UNIT> paramType;
+    protected @NotNull ValueHandler<SOURCE, UNIT> valueParser;
+    protected @NotNull ValueHandler<UNIT, SOURCE> valueSerializer;
 
     protected AbstractSourceBuilder(@NotNull ValueType<V> type,
-                                    @NotNull ValueType<SOURCE> sourceType, @NotNull ValueType<PARAM> paramType,
-                                    @NotNull ValueHandler<SOURCE, PARAM> parser,
-                                    @NotNull ValueHandler<PARAM, SOURCE> serializer) {
+                                    @NotNull ValueType<SOURCE> sourceType, @NotNull ValueType<UNIT> paramType,
+                                    @NotNull ValueHandler<SOURCE, UNIT> parser,
+                                    @NotNull ValueHandler<UNIT, SOURCE> serializer) {
         super(type);
         this.sourceType = sourceType;
         this.paramType = paramType;
@@ -29,25 +29,25 @@ public abstract class AbstractSourceBuilder<
         this.valueSerializer = serializer;
     }
 
-    public @NotNull SELF parse(@NotNull DataFunction<SOURCE, PARAM> parser) {
+    public @NotNull SELF parse(@NotNull DataFunction<SOURCE, UNIT> parser) {
         return parse((p, source) -> parser.handle(source));
     }
 
-    public @NotNull SELF parse(@NotNull ValueHandler<SOURCE, PARAM> parser) {
+    public @NotNull SELF parse(@NotNull ValueHandler<SOURCE, UNIT> parser) {
         this.valueParser = parser;
         return self();
     }
 
-    public @NotNull SELF serialize(@NotNull ValueHandler<PARAM, SOURCE> serializer) {
+    public @NotNull SELF serialize(@NotNull ValueHandler<UNIT, SOURCE> serializer) {
         this.valueSerializer = serializer;
         return self();
     }
 
-    public @NotNull SELF serialize(@NotNull DataFunction<PARAM, SOURCE> serializer) {
+    public @NotNull SELF serialize(@NotNull DataFunction<UNIT, SOURCE> serializer) {
         return serialize((p, value) -> serializer.handle(value));
     }
 
-    protected ValueAdapter<PARAM> buildAdapter() {
+    protected ValueAdapter<UNIT> buildAdapter() {
         return new ValueAdapter<>(this.paramType)
                 .parser((holder, type, data) -> {
                     SOURCE source = holder.deserialize(this.sourceType, data);

core/src/main/java/cc/carm/lib/configuration/builder/list/SectionListBuilder.java

@@ -8,9 +8,11 @@ import cc.carm.lib.configuration.value.standard.ConfiguredList;
 import org.jetbrains.annotations.NotNull;
 
 import java.util.*;
+import java.util.function.Consumer;
 import java.util.function.Supplier;
 
-public class SectionListBuilder<V> extends AbstractSectionBuilder<List<V>, V, ConfiguredList<V>, SectionListBuilder<V>> {
+public class SectionListBuilder<V>
+        extends AbstractSectionBuilder<List<V>, V, ConfiguredList<V>, SectionListBuilder<V>> {
 
     protected @NotNull Supplier<? extends List<V>> constructor;
 
@@ -32,6 +34,14 @@ public class SectionListBuilder<V> extends AbstractSectionBuilder<List<V>, V, Co
         return defaults(new ArrayList<>(values));
     }
 
+    public final @NotNull SectionListBuilder<V> defaults(@NotNull Consumer<List<V>> constructor) {
+        return defaults(() -> {
+            List<V> list = new ArrayList<>();
+            constructor.accept(list);
+            return list;
+        });
+    }
+
     public SectionListBuilder<V> constructor(@NotNull Supplier<? extends List<V>> constructor) {
         this.constructor = constructor;
         return this;

core/src/main/java/cc/carm/lib/configuration/builder/list/SourceListBuilder.java

@@ -10,6 +10,7 @@ import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
 import java.util.List;
+import java.util.function.Consumer;
 import java.util.function.Supplier;
 
 public class SourceListBuilder<SOURCE, V>
@@ -34,6 +35,23 @@ public class SourceListBuilder<SOURCE, V>
         return defaults(new ArrayList<>(values));
     }
 
+    public final @NotNull SourceListBuilder<SOURCE, V> defaults(@NotNull Consumer<List<V>> constructor) {
+        return defaults(() -> {
+            List<V> list = new ArrayList<>();
+            constructor.accept(list);
+            return list;
+        });
+    }
+
+    public SourceListBuilder<SOURCE, V> constructor(@NotNull Supplier<? extends List<V>> constructor) {
+        this.constructor = constructor;
+        return this;
+    }
+
+    public <LIST extends List<V>> SourceListBuilder<SOURCE, V> construct(@NotNull LIST list) {
+        return constructor(() -> list);
+    }
+
     @Override
     protected @NotNull SourceListBuilder<SOURCE, V> self() {
         return this;

core/src/main/java/cc/carm/lib/configuration/builder/map/SectionMapBuilder.java

@@ -14,10 +14,7 @@ import java.util.function.Consumer;
 import java.util.function.Supplier;
 
 public class SectionMapBuilder<MAP extends Map<K, V>, K, V>
-        extends AbstractSectionBuilder<
-        Map<K, V>, V, ConfiguredMap<K, V>,
-        SectionMapBuilder<MAP, K, V>
-        > {
+        extends AbstractSectionBuilder<Map<K, V>, V, ConfiguredMap<K, V>, SectionMapBuilder<MAP, K, V>> {
 
     protected final @NotNull ValueType<K> keyType;
 

core/src/main/java/cc/carm/lib/configuration/builder/map/SourceMapBuilder.java

@@ -13,10 +13,7 @@ import java.util.function.Consumer;
 import java.util.function.Supplier;
 
 public class SourceMapBuilder<MAP extends Map<K, V>, SOURCE, K, V>
-        extends AbstractSourceBuilder<
-        Map<K, V>, SOURCE, V, ConfiguredMap<K, V>,
-        SourceMapBuilder<MAP, SOURCE, K, V>
-        > {
+        extends AbstractSourceBuilder<Map<K, V>, SOURCE, V, ConfiguredMap<K, V>, SourceMapBuilder<MAP, SOURCE, K, V>> {
 
     protected final @NotNull ValueType<K> keyType;
 

core/src/main/java/cc/carm/lib/configuration/builder/value/ConfigValueBuilder.java

@@ -1,7 +1,6 @@
 package cc.carm.lib.configuration.builder.value;
 
 import cc.carm.lib.configuration.adapter.ValueType;
-import cc.carm.lib.configuration.builder.impl.AbstractSectionBuilder;
 import cc.carm.lib.configuration.function.ValueHandler;
 import cc.carm.lib.configuration.source.section.ConfigureSection;
 import org.jetbrains.annotations.NotNull;

core/src/main/java/cc/carm/lib/configuration/builder/value/SourceValueBuilder.java

@@ -6,7 +6,8 @@ import cc.carm.lib.configuration.function.ValueHandler;
 import cc.carm.lib.configuration.value.standard.ConfiguredValue;
 import org.jetbrains.annotations.NotNull;
 
-public class SourceValueBuilder<S, V> extends AbstractSourceBuilder<V, S, V, ConfiguredValue<V>, SourceValueBuilder<S, V>> {
+public class SourceValueBuilder<S, V>
+        extends AbstractSourceBuilder<V, S, V, ConfiguredValue<V>, SourceValueBuilder<S, V>> {
 
 
     public SourceValueBuilder(@NotNull ValueType<S> sourceType, @NotNull ValueType<V> valueType,

core/src/main/java/cc/carm/lib/configuration/function/ConfigExceptionHandler.java

@@ -0,0 +1,22 @@
+package cc.carm.lib.configuration.function;
+
+import org.jetbrains.annotations.NotNull;
+
+@FunctionalInterface
+public interface ConfigExceptionHandler {
+
+    void handle(@NotNull String path, @NotNull Throwable throwable);
+
+    static @NotNull ConfigExceptionHandler silence() {
+        return (path, throwable) -> {
+        };
+    }
+
+    static @NotNull ConfigExceptionHandler print() {
+        return (path, throwable) -> {
+            System.err.println("Error occurred at path: " + path);
+            throwable.printStackTrace();
+        };
+    }
+
+}

core/src/main/java/cc/carm/lib/configuration/function/DataValidator.java

@@ -0,0 +1,17 @@
+package cc.carm.lib.configuration.function;
+
+import org.jetbrains.annotations.Nullable;
+
+@FunctionalInterface
+public interface DataValidator<T> {
+
+    void validate(@Nullable T value) throws Exception;
+
+    default DataValidator<T> compose(DataValidator<? super T> other) {
+        return value -> {
+            validate(value);
+            other.validate(value);
+        };
+    }
+
+}

core/src/main/java/cc/carm/lib/configuration/function/ValueComposer.java

@@ -0,0 +1,29 @@
+package cc.carm.lib.configuration.function;
+
+
+import cc.carm.lib.configuration.source.ConfigurationHolder;
+import org.jetbrains.annotations.NotNull;
+
+@FunctionalInterface
+public interface ValueComposer<T, U> {
+
+    /**
+     * Accept the value and the data, and then compose the value.
+     *
+     * @param holder The configuration holder
+     * @param type   The value type, e.g. {@link java.util.List}, {@link java.util.Map}, etc.
+     * @param data   The unit data
+     * @throws Exception If an error occurs
+     */
+    void accept(@NotNull ConfigurationHolder<?> holder, @NotNull T type, @NotNull U data) throws Exception;
+
+    default ValueComposer<T, U> andThen(ValueComposer<? super T, ? super U> after) {
+        return (holder, unit, data) -> {
+            accept(holder, unit, data);
+            after.accept(holder, unit, data);
+        };
+    }
+
+}
+
+

core/src/main/java/cc/carm/lib/configuration/function/ValueConsumer.java

@@ -1,21 +0,0 @@
-package cc.carm.lib.configuration.function;
-
-
-import cc.carm.lib.configuration.source.ConfigurationHolder;
-import org.jetbrains.annotations.NotNull;
-
-@FunctionalInterface
-public interface ValueConsumer<U, T> {
-
-    void accept(@NotNull ConfigurationHolder<?> holder, @NotNull U unit, @NotNull T data) throws Exception;
-
-    default ValueConsumer<U, T> andThen(ValueConsumer<? super U, ? super T> after) {
-        return (holder, unit, data) -> {
-            accept(holder, unit, data);
-            after.accept(holder, unit, data);
-        };
-    }
-
-}
-
-

core/src/main/java/cc/carm/lib/configuration/function/ValueValidator.java

@@ -0,0 +1,47 @@
+package cc.carm.lib.configuration.function;
+
+import cc.carm.lib.configuration.source.ConfigurationHolder;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+@FunctionalInterface
+public interface ValueValidator<T> {
+
+    void validate(@NotNull ConfigurationHolder<?> holder, @Nullable T value) throws Exception;
+
+    default ValueValidator<T> and(ValueValidator<? super T> other) {
+        return (holder, value) -> {
+            validate(holder, value);
+            other.validate(holder, value);
+        };
+    }
+
+    static <V> ValueValidator<V> none() {
+        return (holder, data) -> {
+        };
+    }
+
+    static <V> ValueValidator<V> nonnull() {
+        return nonnull("Value cannot be null");
+    }
+
+    static <V> ValueValidator<V> nonnull(String message) {
+        return (holder, data) -> {
+            if (data == null) throw new IllegalArgumentException(message);
+        };
+    }
+
+    static <V extends Number> ValueValidator<V> range(V min, V max) {
+        return range(min, max, "Value must be in range [" + min + ", " + max + "]");
+    }
+
+    static <V extends Number> ValueValidator<V> range(V min, V max, String message) {
+        return (holder, data) -> {
+            if (data.doubleValue() < min.doubleValue() || data.doubleValue() > max.doubleValue()) {
+                throw new IllegalArgumentException(message);
+            }
+        };
+    }
+
+
+}

core/src/main/java/cc/carm/lib/configuration/source/ConfigurationFactory.java

@@ -2,7 +2,9 @@ package cc.carm.lib.configuration.source;
 
 import cc.carm.lib.configuration.adapter.*;
 import cc.carm.lib.configuration.adapter.strandard.StandardAdapters;
+import cc.carm.lib.configuration.function.ConfigExceptionHandler;
 import cc.carm.lib.configuration.function.DataFunction;
+import cc.carm.lib.configuration.function.ValueValidator;
 import cc.carm.lib.configuration.source.loader.ConfigurationInitializer;
 import cc.carm.lib.configuration.source.loader.PathGenerator;
 import cc.carm.lib.configuration.source.meta.ConfigurationMetaHolder;
@@ -33,15 +35,17 @@ public abstract class ConfigurationFactory<
         SELF
         > {
 
-    protected ValueAdapterRegistry adapters = new ValueAdapterRegistry();
-    protected ConfigurationOptionHolder options = new ConfigurationOptionHolder();
+    protected @NotNull ValueAdapterRegistry adapters = new ValueAdapterRegistry();
+    protected @NotNull ConfigurationOptionHolder options = new ConfigurationOptionHolder();
     protected @NotNull Map<String, ConfigurationMetaHolder> metadata = new HashMap<>();
-    protected ConfigurationInitializer initializer = new ConfigurationInitializer();
+    protected @NotNull ConfigurationInitializer initializer = new ConfigurationInitializer();
+    protected @NotNull ConfigExceptionHandler exceptionHandler = ConfigExceptionHandler.print();
 
-    public ConfigurationFactory() {
+    protected ConfigurationFactory() {
         this.adapters.register(StandardAdapters.PRIMITIVES);
         this.adapters.register(StandardAdapters.SECTIONS);
         this.adapters.register(StandardAdapters.ENUMS);
+        this.adapters.register(StandardAdapters.UUID);
     }
 
     protected abstract SELF self();
@@ -146,6 +150,11 @@ public abstract class ConfigurationFactory<
         return self();
     }
 
+    public SELF exceptionally(@NotNull ConfigExceptionHandler handler) {
+        this.exceptionHandler = handler;
+        return self();
+    }
+
     /**
      * Supply the base path generator for this configuration holder
      *
@@ -153,9 +162,7 @@ public abstract class ConfigurationFactory<
      * @return this
      */
     public SELF pathGenerator(PathGenerator generator) {
-        return initializer(loader -> {
-            loader.pathGenerator(generator);
-        });
+        return initializer(loader -> loader.pathGenerator(generator));
     }
 
     /**
@@ -174,6 +181,19 @@ public abstract class ConfigurationFactory<
         return initializer(loader -> loader.registerAnnotation(annotation, metadata, extractor));
     }
 
+    /**
+     * Register a new annotation for {@link ValueValidator} to the configuration loader
+     *
+     * @param annotation The {@link Annotation}
+     * @param builder    The {@link Function} to build the {@link ValueValidator} from the annotation
+     * @param <A>        The annotation type
+     * @return this
+     */
+    public <A extends Annotation> SELF validAnnotation(@NotNull Class<A> annotation,
+                                                       @NotNull Function<A, ValueValidator<Object>> builder) {
+        return initializer(loader -> loader.registerValidAnnotation(annotation, builder));
+    }
+
     /**
      * Build the configuration holder.
      *

core/src/main/java/cc/carm/lib/configuration/source/ConfigurationHolder.java

@@ -3,6 +3,7 @@ package cc.carm.lib.configuration.source;
 import cc.carm.lib.configuration.Configuration;
 import cc.carm.lib.configuration.adapter.ValueAdapterRegistry;
 import cc.carm.lib.configuration.adapter.ValueType;
+import cc.carm.lib.configuration.function.ConfigExceptionHandler;
 import cc.carm.lib.configuration.source.loader.ConfigurationInitializer;
 import cc.carm.lib.configuration.source.meta.ConfigurationMetaHolder;
 import cc.carm.lib.configuration.source.meta.ConfigurationMetadata;
@@ -12,7 +13,6 @@ import cc.carm.lib.configuration.source.option.ConfigurationOptionHolder;
 import cc.carm.lib.configuration.source.section.ConfigureSource;
 import cc.carm.lib.configuration.value.ConfigValue;
 import cc.carm.lib.configuration.value.ValueManifest;
-import org.jetbrains.annotations.Contract;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 import org.jetbrains.annotations.UnmodifiableView;
@@ -31,14 +31,25 @@ public abstract class ConfigurationHolder<SOURCE extends ConfigureSource<?, ?, S
 
     protected final @NotNull ConfigurationInitializer initializer;
 
+    protected @NotNull ConfigExceptionHandler exceptionHandler;
+
     public ConfigurationHolder(@NotNull ValueAdapterRegistry adapters,
                                @NotNull ConfigurationOptionHolder options,
                                @NotNull Map<String, ConfigurationMetaHolder> metadata,
                                @NotNull ConfigurationInitializer initializer) {
+        this(adapters, options, metadata, initializer, ConfigExceptionHandler.print());
+    }
+
+    public ConfigurationHolder(@NotNull ValueAdapterRegistry adapters,
+                               @NotNull ConfigurationOptionHolder options,
+                               @NotNull Map<String, ConfigurationMetaHolder> metadata,
+                               @NotNull ConfigurationInitializer initializer,
+                               @NotNull ConfigExceptionHandler exceptionHandler) {
         this.initializer = initializer;
         this.adapters = adapters;
         this.options = options;
         this.metadata = metadata;
+        this.exceptionHandler = exceptionHandler;
     }
 
     public abstract @NotNull SOURCE config();
@@ -75,7 +86,7 @@ public abstract class ConfigurationHolder<SOURCE extends ConfigureSource<?, ?, S
 
     @NotNull
     @UnmodifiableView
-    public <M> Map<String, M> extractMetadata(@NotNull ConfigurationMetadata<M> type, @NotNull Predicate<M> filter) {
+    public <M> Map<String, M> extractMetadata(@NotNull ConfigurationMetadata<M> type, @NotNull Predicate<@Nullable M> filter) {
         Map<String, M> metas = new LinkedHashMap<>();
         for (Map.Entry<String, ConfigurationMetaHolder> entry : this.metadata.entrySet()) {
             M data = entry.getValue().get(type);
@@ -86,7 +97,7 @@ public abstract class ConfigurationHolder<SOURCE extends ConfigureSource<?, ?, S
 
     @NotNull
     @UnmodifiableView
-    public Map<String, ConfigValue<?>> registeredValues() {
+    public Map<String, ConfigValue<?, ?>> registeredValues() {
         return extractMetadata(StandardMeta.VALUE);
     }
 
@@ -98,17 +109,17 @@ public abstract class ConfigurationHolder<SOURCE extends ConfigureSource<?, ?, S
         return initializer;
     }
 
-    @Contract("_,null -> null")
+    @Nullable
     public <T> T deserialize(@NotNull Class<T> type, @Nullable Object source) throws Exception {
         return adapters().deserialize(this, type, source);
     }
 
-    @Contract("_,null -> null")
+    @Nullable
     public <T> T deserialize(@NotNull ValueType<T> type, @Nullable Object source) throws Exception {
         return adapters().deserialize(this, type, source);
     }
 
-    @Contract("null -> null")
+    @Nullable
     public <T> Object serialize(@Nullable T value) throws Exception {
         return adapters().serialize(this, value);
     }
@@ -117,7 +128,7 @@ public abstract class ConfigurationHolder<SOURCE extends ConfigureSource<?, ?, S
         try {
             initializer.initialize(this, configClass);
         } catch (Exception e) {
-            e.printStackTrace();
+            throwing(configClass.getName(), e);
         }
     }
 
@@ -125,12 +136,20 @@ public abstract class ConfigurationHolder<SOURCE extends ConfigureSource<?, ?, S
         try {
             initializer.initialize(this, config);
         } catch (Exception e) {
-            e.printStackTrace();
+            throwing(config.getClass().getName(), e);
         }
     }
 
-    public void initialize(@NotNull ValueManifest<?> value) {
+    public void initialize(@NotNull ValueManifest<?, ?> value) {
         value.holder(this);
     }
 
+    public void throwing(@NotNull String path, @NotNull Throwable e) {
+        this.exceptionHandler.handle(path, e);
+    }
+
+    public void exceptionally(@NotNull ConfigExceptionHandler handler) {
+        this.exceptionHandler = handler;
+    }
+
 }

core/src/main/java/cc/carm/lib/configuration/source/loader/ConfigInitializeHandler.java

@@ -8,7 +8,7 @@ import org.jetbrains.annotations.Nullable;
 public interface ConfigInitializeHandler<T, V> {
 
     static <T, V> ConfigInitializeHandler<T, V> start() {
-        return (provider, path, value, instace) -> {
+        return (provider, path, value, instance) -> {
         };
     }
 

core/src/main/java/cc/carm/lib/configuration/source/loader/ConfigurationInitializer.java

@@ -1,6 +1,7 @@
 package cc.carm.lib.configuration.source.loader;
 
 import cc.carm.lib.configuration.Configuration;
+import cc.carm.lib.configuration.function.ValueValidator;
 import cc.carm.lib.configuration.source.ConfigurationHolder;
 import cc.carm.lib.configuration.source.meta.ConfigurationMetadata;
 import cc.carm.lib.configuration.source.meta.StandardMeta;
@@ -21,7 +22,7 @@ import java.util.function.Function;
 public class ConfigurationInitializer {
 
     protected @NotNull PathGenerator pathGenerator;
-    protected @NotNull ConfigInitializeHandler<Field, ConfigValue<?>> valueInitializer;
+    protected @NotNull ConfigInitializeHandler<Field, ConfigValue<?, ?>> valueInitializer;
     protected @NotNull ConfigInitializeHandler<Class<? extends Configuration>, Object> classInitializer;
 
     public ConfigurationInitializer() {
@@ -29,7 +30,7 @@ public class ConfigurationInitializer {
     }
 
     public ConfigurationInitializer(@NotNull PathGenerator pathGenerator,
-                                    @NotNull ConfigInitializeHandler<Field, ConfigValue<?>> valueInitializer,
+                                    @NotNull ConfigInitializeHandler<Field, ConfigValue<?, ?>> valueInitializer,
                                     @NotNull ConfigInitializeHandler<Class<? extends Configuration>, Object> classInitializer) {
         this.pathGenerator = pathGenerator;
         this.valueInitializer = valueInitializer;
@@ -44,11 +45,11 @@ public class ConfigurationInitializer {
         return pathGenerator;
     }
 
-    public ConfigInitializeHandler<Field, ConfigValue<?>> fieldInitializer() {
+    public ConfigInitializeHandler<Field, ConfigValue<?, ?>> fieldInitializer() {
         return valueInitializer;
     }
 
-    public void fieldInitializer(@NotNull ConfigInitializeHandler<Field, ConfigValue<?>> fieldInitializer) {
+    public void fieldInitializer(@NotNull ConfigInitializeHandler<Field, ConfigValue<?, ?>> fieldInitializer) {
         this.valueInitializer = fieldInitializer;
     }
 
@@ -60,7 +61,7 @@ public class ConfigurationInitializer {
         this.classInitializer = classInitializer;
     }
 
-    public void appendFieldInitializer(@NotNull ConfigInitializeHandler<Field, ConfigValue<?>> fieldInitializer) {
+    public void appendFieldInitializer(@NotNull ConfigInitializeHandler<Field, ConfigValue<?, ?>> fieldInitializer) {
         this.valueInitializer = this.valueInitializer.andThen(fieldInitializer);
     }
 
@@ -95,6 +96,14 @@ public class ConfigurationInitializer {
         registerFieldAnnotation(annotation, metadata, extractor);
     }
 
+    public <A extends Annotation> void registerValidAnnotation(@NotNull Class<A> annotation,
+                                                               @NotNull Function<A, ValueValidator<Object>> builder) {
+        appendFieldInitializer((holder, path, field, instance) -> {
+            A data = field.getAnnotation(annotation);
+            if (data == null) return;
+            instance.validate((h, t) -> builder.apply(data).validate(h, t));
+        });
+    }
 
     public @Nullable String getFieldPath(@NotNull ConfigurationHolder<?> holder, @Nullable String parentPath, @NotNull Field field) {
         return pathGenerator.getFieldPath(holder, parentPath, field);
@@ -125,7 +134,7 @@ public class ConfigurationInitializer {
         try {
             this.classInitializer.whenInitialize(holder, path, root.getClass(), root);
         } catch (Exception e) {
-            e.printStackTrace();
+            holder.throwing(path, e);
         }
         Arrays.stream(root.getClass().getDeclaredFields()).forEach(field -> initializeField(holder, root, field, path));
     }
@@ -142,7 +151,7 @@ public class ConfigurationInitializer {
         try {
             this.classInitializer.whenInitialize(holder, path, (Class<? extends Configuration>) clazz, configField);
         } catch (Exception e) {
-            e.printStackTrace();
+            holder.throwing(path, e);
         }
 
         for (Field field : clazz.getDeclaredFields()) {
@@ -163,9 +172,9 @@ public class ConfigurationInitializer {
             field.setAccessible(true);
             Object object = field.get(source);
 //
-            if (object instanceof ConfigValue<?>) {
+            if (object instanceof ConfigValue<?, ?>) {
                 // 目标是 ConfigValue 实例，进行具体的初始化注入
-                ConfigValue<?> value = (ConfigValue<?>) object;
+                ConfigValue<?, ?> value = (ConfigValue<?, ?>) object;
                 String path = getFieldPath(holder, parent, field);
                 if (path == null) return;
                 value.initialize(holder, path);
@@ -176,7 +185,7 @@ public class ConfigurationInitializer {
                 try {
                     this.valueInitializer.whenInitialize(holder, path, field, value);
                 } catch (Exception e) {
-                    e.printStackTrace();
+                    holder.throwing(path, e);
                 }
                 if (holder.option(StandardOptions.PRELOAD)) {
                     value.get(); // Preload the value by calling #get method.

core/src/main/java/cc/carm/lib/configuration/source/meta/StandardMeta.java

@@ -7,6 +7,6 @@ public interface StandardMeta {
     /**
      * To mark the {@link ConfigValue} instance of specific path.
      */
-    ConfigurationMetadata<ConfigValue<?>> VALUE = ConfigurationMetadata.of();
+    ConfigurationMetadata<ConfigValue<?, ?>> VALUE = ConfigurationMetadata.of();
 
 }

core/src/main/java/cc/carm/lib/configuration/value/ConfigValue.java

@@ -33,9 +33,9 @@ import java.util.Optional;
  * @see ValueManifest Base class providing metadata and default value handling
  * @see ConfigurationHolder Responsible for configuration source persistence
  */
-public abstract class ConfigValue<T> extends ValueManifest<T> {
+public abstract class ConfigValue<T, U> extends ValueManifest<T, U> {
 
-    protected ConfigValue(@NotNull ValueManifest<T> manifest) {
+    protected ConfigValue(@NotNull ValueManifest<T, U> manifest) {
         super(manifest);
     }
 

core/src/main/java/cc/carm/lib/configuration/value/ValueManifest.java

@@ -1,6 +1,7 @@
 package cc.carm.lib.configuration.value;
 
 import cc.carm.lib.configuration.adapter.ValueType;
+import cc.carm.lib.configuration.function.ValueValidator;
 import cc.carm.lib.configuration.source.ConfigurationHolder;
 import cc.carm.lib.configuration.source.meta.ConfigurationMetaHolder;
 import cc.carm.lib.configuration.source.section.ConfigureSource;
@@ -11,37 +12,48 @@ import org.jetbrains.annotations.Nullable;
 import java.util.function.BiConsumer;
 import java.util.function.Supplier;
 
-public class ValueManifest<T> {
+public class ValueManifest<TYPE, UNIT> {
 
-    protected final @NotNull ValueType<T> type;
+    protected final @NotNull ValueType<TYPE> type;
     protected final @NotNull BiConsumer<@NotNull ConfigurationHolder<?>, @NotNull String> initializer;
 
     protected @Nullable ConfigurationHolder<?> holder;
     protected @Nullable String path; // Section path
 
-    protected @NotNull Supplier<@Nullable T> defaultSupplier;
+    protected @NotNull ValueValidator<UNIT> validator;
+    protected @NotNull Supplier<@Nullable TYPE> defaultSupplier;
 
-    public ValueManifest(@NotNull ValueType<T> type) {
-        this(type, () -> null, EMPTY_INITIALIZER, null, null);
+    public ValueManifest(@NotNull ValueType<TYPE> type) {
+        this(type, () -> null, ValueValidator.none(), EMPTY_INITIALIZER, null, null);
     }
 
-    public ValueManifest(@NotNull T defaultValue) {
+    public ValueManifest(@NotNull TYPE defaultValue) {
         this(ValueType.of(defaultValue), () -> defaultValue);
     }
 
-    public ValueManifest(@NotNull ValueType<T> type, @NotNull Supplier<@Nullable T> defaultSupplier) {
-        this(type, defaultSupplier, EMPTY_INITIALIZER, null, null);
+    public ValueManifest(@NotNull ValueType<TYPE> type, @NotNull Supplier<@Nullable TYPE> defaultSupplier) {
+        this(type, defaultSupplier, ValueValidator.none(), EMPTY_INITIALIZER, null, null);
     }
 
-    public ValueManifest(@NotNull ValueType<T> type, @NotNull Supplier<@Nullable T> defaultSupplier,
+    public ValueManifest(@NotNull ValueType<TYPE> type,
+                         @NotNull Supplier<@Nullable TYPE> defaultSupplier,
+                         @NotNull ValueValidator<UNIT> validator) {
+        this(type, defaultSupplier, validator, EMPTY_INITIALIZER, null, null);
+    }
+
+    public ValueManifest(@NotNull ValueType<TYPE> type, @NotNull Supplier<@Nullable TYPE> defaultSupplier,
+                         @NotNull ValueValidator<UNIT> validator,
                          @NotNull BiConsumer<@NotNull ConfigurationHolder<?>, @NotNull String> initializer) {
-        this(type, defaultSupplier, initializer, null, null);
+        this(type, defaultSupplier, validator, initializer, null, null);
     }
 
-    public ValueManifest(@NotNull ValueType<T> type, @NotNull Supplier<@Nullable T> defaultSupplier,
+    public ValueManifest(@NotNull ValueType<TYPE> type,
+                         @NotNull Supplier<@Nullable TYPE> defaultSupplier,
+                         @NotNull ValueValidator<UNIT> validator,
                          @NotNull BiConsumer<@NotNull ConfigurationHolder<?>, @NotNull String> initializer,
                          @Nullable ConfigurationHolder<?> holder, @Nullable String path) {
         this.type = type;
+        this.validator = validator;
         this.initializer = initializer;
         this.defaultSupplier = defaultSupplier;
         this.holder = holder;
@@ -49,8 +61,8 @@ public class ValueManifest<T> {
         initialize();
     }
 
-    protected ValueManifest(@NotNull ValueManifest<T> manifest) {
-        this(manifest.type, manifest.defaultSupplier, manifest.initializer, manifest.holder, manifest.path);
+    protected ValueManifest(@NotNull ValueManifest<TYPE, UNIT> manifest) {
+        this(manifest.type, manifest.defaultSupplier, manifest.validator, manifest.initializer, manifest.holder, manifest.path);
     }
 
     public void initialize(@NotNull ConfigurationHolder<?> holder, @NotNull String path) {
@@ -63,7 +75,7 @@ public class ValueManifest<T> {
         if (holder != null && path != null) this.initializer.accept(holder, path);
     }
 
-    public @NotNull ValueType<T> type() {
+    public @NotNull ValueType<TYPE> type() {
         return this.type;
     }
 
@@ -75,20 +87,37 @@ public class ValueManifest<T> {
         this.path = path;
     }
 
-    public @Nullable T defaults() {
+    public @Nullable TYPE defaults() {
         return this.defaultSupplier.get();
     }
 
-    public void defaults(@Nullable T defaultValue) {
+    public void defaults(@Nullable TYPE defaultValue) {
         defaults(() -> defaultValue);
     }
 
-    public void defaults(@NotNull Supplier<@Nullable T> defaultValue) {
+    public void defaults(@NotNull Supplier<@Nullable TYPE> defaultValue) {
         this.defaultSupplier = defaultValue;
     }
 
     public boolean hasDefaults() {
-        return this.defaultSupplier.get() != null;
+        return defaults() != null;
+    }
+
+    public @NotNull ValueValidator<UNIT> validator() {
+        return this.validator;
+    }
+
+    public void validator(@NotNull ValueValidator<UNIT> validator) {
+        this.validator = validator;
+    }
+
+    public void validate(@NotNull ValueValidator<UNIT> validator) {
+        validator(this.validator.and(validator));
+    }
+
+    protected UNIT withValidated(@Nullable UNIT value) throws Exception {
+        validator.validate(holder(), value);
+        return value;
     }
 
     public @NotNull String path() {
@@ -105,7 +134,7 @@ public class ValueManifest<T> {
         return holder().config();
     }
 
-    public ConfigurationMetaHolder metadata() {
+    public @NotNull ConfigurationMetaHolder metadata() {
         return holder().metadata(path());
     }
 
@@ -119,6 +148,15 @@ public class ValueManifest<T> {
         config().set(path(), value);
     }
 
+    protected void throwing(@NotNull Throwable throwable) {
+        throwing(path, throwable);
+    }
+
+    protected void throwing(@NotNull String path, @NotNull Throwable throwable) {
+        if (holder == null) throwable.printStackTrace();
+        else holder.throwing(path, throwable);
+    }
+
     private static final @NotNull BiConsumer<@NotNull ConfigurationHolder<?>, @NotNull String> EMPTY_INITIALIZER = (provider, valuePath) -> {
     };
 

core/src/main/java/cc/carm/lib/configuration/value/impl/CachedConfigValue.java

@@ -9,12 +9,12 @@ import org.jetbrains.annotations.Contract;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
-public abstract class CachedConfigValue<T> extends ConfigValue<T> {
+public abstract class CachedConfigValue<T, U> extends ConfigValue<T, U> {
 
     protected @Nullable T cachedValue;
     protected long parsedTime = -1;
 
-    protected CachedConfigValue(@NotNull ValueManifest<T> manifest) {
+    protected CachedConfigValue(@NotNull ValueManifest<T, U> manifest) {
         super(manifest);
     }
 

core/src/main/java/cc/carm/lib/configuration/value/standard/ConfiguredList.java

@@ -5,6 +5,7 @@ import cc.carm.lib.configuration.adapter.ValueParser;
 import cc.carm.lib.configuration.adapter.ValueSerializer;
 import cc.carm.lib.configuration.adapter.ValueType;
 import cc.carm.lib.configuration.builder.list.ConfigListBuilder;
+import cc.carm.lib.configuration.builder.list.SourceListBuilder;
 import cc.carm.lib.configuration.value.ValueManifest;
 import cc.carm.lib.configuration.value.impl.CachedConfigValue;
 import org.jetbrains.annotations.NotNull;
@@ -15,7 +16,7 @@ import java.util.function.Consumer;
 import java.util.function.Function;
 import java.util.function.Supplier;
 
-public class ConfiguredList<V> extends CachedConfigValue<List<V>> implements List<V> {
+public class ConfiguredList<V> extends CachedConfigValue<List<V>, V> implements List<V> {
 
     public static <T> @NotNull ConfigListBuilder<T> builderOf(@NotNull Class<T> type) {
         return builderOf(ValueType.of(type));
@@ -25,10 +26,26 @@ public class ConfiguredList<V> extends CachedConfigValue<List<V>> implements Lis
         return new ConfigListBuilder<>(type);
     }
 
+    public static <T> @NotNull SourceListBuilder<T, T> with(@NotNull Class<T> registeredType) {
+        return with(ValueType.of(registeredType));
+    }
+
+    public static <T> @NotNull SourceListBuilder<T, T> with(@NotNull ValueType<T> registeredType) {
+        return new ConfigListBuilder<>(registeredType).from(registeredType);
+    }
+
+    @SafeVarargs
+    public static <T> @NotNull ConfiguredList<T> of(@NotNull T value, @NotNull T... values) {
+        List<T> list = new ArrayList<>();
+        list.add(value);
+        Collections.addAll(list, values);
+        return with(ValueType.of(value)).defaults(list).build();
+    }
+
     protected final @NotNull Supplier<? extends List<V>> constructor;
     protected final @NotNull ValueAdapter<V> paramAdapter;
 
-    public ConfiguredList(@NotNull ValueManifest<List<V>> manifest,
+    public ConfiguredList(@NotNull ValueManifest<List<V>, V> manifest,
                           @NotNull Supplier<? extends List<V>> constructor,
                           @NotNull ValueAdapter<V> paramAdapter) {
         super(manifest);
@@ -70,40 +87,46 @@ public class ConfiguredList<V> extends CachedConfigValue<List<V>> implements Lis
         if (!cacheExpired()) return getCachedOrDefault(createList());
         // Data that is outdated and needs to be parsed again.
         List<V> list = createList();
+        try {
             List<?> data = config().contains(path()) ? config().getList(path()) : null;
             if (data == null) return getDefaultFirst(list);
 
             ValueParser<V> parser = parser();
             if (parser == null) return getDefaultFirst(list);
 
+            int i = 0;
             for (Object dataVal : data) {
                 if (dataVal == null) continue;
                 try {
-                list.add(parser.parse(holder(), paramType(), dataVal));
+                    list.add(withValidated(parser.parse(holder(), paramType(), dataVal)));
                 } catch (Exception e) {
-                e.printStackTrace();
+                    throwing(path + "[" + i + "]", e);
                 }
             }
+        } catch (Exception ex) {
+            throwing(ex);
+        }
         return updateCache(list);
     }
 
     @Override
-    public void set(@Nullable List<V> value) {
-        updateCache(value);
-        if (value == null) {
+    public void set(@Nullable List<V> list) {
+        updateCache(list);
+        if (list == null) {
             setData(null);
             return;
         }
 
         ValueSerializer<V> serializer = serializer();
         if (serializer == null) return;
+
         List<Object> data = new ArrayList<>();
-        for (V val : value) {
+        for (V val : list) {
             if (val == null) continue;
             try {
-                data.add(serializer.serialize(holder(), paramType(), val));
+                data.add(serializer.serialize(holder(), paramType(), withValidated(val)));
             } catch (Exception ex) {
-                ex.printStackTrace();
+                throwing(ex);
             }
         }
         setData(data);

core/src/main/java/cc/carm/lib/configuration/value/standard/ConfiguredMap.java

@@ -17,7 +17,11 @@ import java.util.function.Consumer;
 import java.util.function.Function;
 import java.util.function.Supplier;
 
-public class ConfiguredMap<K, V> extends CachedConfigValue<Map<K, V>> implements Map<K, V> {
+public class ConfiguredMap<K, V> extends CachedConfigValue<Map<K, V>, V> implements Map<K, V> {
+
+    public static <V> ConfigMapCreator<String, V> builderOf(@NotNull Class<V> valueType) {
+        return builderOf(String.class, valueType);
+    }
 
     public static <K, V> ConfigMapCreator<K, V> builderOf(@NotNull ValueType<K> keyType, @NotNull ValueType<V> valueType) {
         return new ConfigMapCreator<>(keyType, valueType);
@@ -38,7 +42,7 @@ public class ConfiguredMap<K, V> extends CachedConfigValue<Map<K, V>> implements
     protected final @NotNull ValueAdapter<K> keyAdapter;
     protected final @NotNull ValueAdapter<V> valueAdapter;
 
-    public ConfiguredMap(@NotNull ValueManifest<Map<K, V>> manifest,
+    public ConfiguredMap(@NotNull ValueManifest<Map<K, V>, V> manifest,
                          @NotNull Supplier<? extends Map<K, V>> constructor,
                          @NotNull ValueAdapter<K> keyAdapter, @NotNull ValueAdapter<V> valueAdapter) {
         super(manifest);
@@ -73,6 +77,7 @@ public class ConfiguredMap<K, V> extends CachedConfigValue<Map<K, V>> implements
         // If the value is expired, we need to update it
         Map<K, V> map = createMap();
 
+        try {
             ConfigureSection section = config().getSection(path());
             if (section == null) return getDefaultFirst(map);
 
@@ -80,8 +85,9 @@ public class ConfiguredMap<K, V> extends CachedConfigValue<Map<K, V>> implements
             if (keys.isEmpty()) return getDefaultFirst(map);
 
             ValueParser<K> keyParser = parserFor(keyAdapter);
+            if (keyParser == null) return getDefaultFirst(map);
             ValueParser<V> valueParser = parserFor(valueAdapter);
-        if (keyParser == null || valueParser == null) return getDefaultFirst(map);
+            if (valueParser == null) return getDefaultFirst(map);
 
             for (String dataKey : keys) {
                 Object dataVal = section.get(dataKey);
@@ -89,11 +95,14 @@ public class ConfiguredMap<K, V> extends CachedConfigValue<Map<K, V>> implements
                 try {
                     K key = keyParser.parse(holder(), keyType(), dataKey);
                     V value = valueParser.parse(holder(), valueType(), dataVal);
-                map.put(key, value);
+                    map.put(key, withValidated(value));
                 } catch (Exception e) {
-                e.printStackTrace();
+                    throwing(path + "." + dataKey, e);
                 }
             }
+        } catch (Exception ex) {
+            throwing(ex);
+        }
 
         return updateCache(map);
     }
@@ -115,9 +124,11 @@ public class ConfiguredMap<K, V> extends CachedConfigValue<Map<K, V>> implements
             return;
         }
 
+        try {
             ValueSerializer<K> keySerializer = serializerFor(keyAdapter);
+            if (keySerializer == null) return;
             ValueSerializer<V> valueSerializer = serializerFor(valueAdapter);
-        if (keySerializer == null || valueSerializer == null) return;
+            if (valueSerializer == null) return;
 
             Map<Object, Object> data = new LinkedHashMap<>();
 
@@ -125,13 +136,16 @@ public class ConfiguredMap<K, V> extends CachedConfigValue<Map<K, V>> implements
                 try {
                     data.put(
                             keySerializer.serialize(holder(), keyType(), entry.getKey()),
-                        valueSerializer.serialize(holder(), valueType(), entry.getValue())
+                            valueSerializer.serialize(holder(), valueType(), withValidated(entry.getValue()))
                     );
                 } catch (Exception e) {
-                e.printStackTrace();
+                    throwing(path + "." + entry.getKey(), e);
                 }
             }
             setData(data);
+        } catch (Exception ex) {
+            throwing(ex);
+        }
     }
 
     public <T> @NotNull T handle(Function<Map<K, V>, T> function) {

core/src/main/java/cc/carm/lib/configuration/value/standard/ConfiguredValue.java

@@ -5,6 +5,8 @@ import cc.carm.lib.configuration.adapter.ValueParser;
 import cc.carm.lib.configuration.adapter.ValueSerializer;
 import cc.carm.lib.configuration.adapter.ValueType;
 import cc.carm.lib.configuration.builder.value.ConfigValueBuilder;
+import cc.carm.lib.configuration.builder.value.SourceValueBuilder;
+import cc.carm.lib.configuration.source.ConfigurationHolder;
 import cc.carm.lib.configuration.value.ValueManifest;
 import cc.carm.lib.configuration.value.impl.CachedConfigValue;
 import org.jetbrains.annotations.NotNull;
@@ -12,16 +14,54 @@ import org.jetbrains.annotations.Nullable;
 
 import java.util.function.Supplier;
 
-public class ConfiguredValue<V> extends CachedConfigValue<V> {
+public class ConfiguredValue<V> extends CachedConfigValue<V, V> {
 
+    /**
+     * Create a new value builder.
+     *
+     * @param type The type of the value.
+     * @param <V>  The type of the value.
+     * @return a {@link ConfigValueBuilder} with the specified type.
+     */
     public static <V> ConfigValueBuilder<V> builderOf(@NotNull Class<V> type) {
         return new ConfigValueBuilder<>(ValueType.of(type));
     }
 
+    /**
+     * Create a new value builder.
+     *
+     * @param type The type of the value.
+     * @param <V>  The type of the value.
+     * @return a {@link ConfigValueBuilder} with the specified type.
+     */
     public static <V> ConfigValueBuilder<V> builderOf(@NotNull ValueType<V> type) {
         return new ConfigValueBuilder<>(type);
     }
 
+    /**
+     * Create a new value builder with the specified {@link ConfigurationHolder#registeredValues()} type.
+     *
+     * @param registeredType The type of the value.
+     * @param <V>            The type of the value.
+     * @return a {@link SourceValueBuilder} with the specified registered type.
+     * @see ValueAdapter
+     */
+    public static <V> SourceValueBuilder<V, V> with(@NotNull Class<V> registeredType) {
+        return with(ValueType.of(registeredType));
+    }
+
+    /**
+     * Create a new value builder with the specified {@link ConfigurationHolder#registeredValues()} type.
+     *
+     * @param registeredType The type of the value.
+     * @param <V>            The type of the value.
+     * @return a {@link SourceValueBuilder} with the specified registered type.
+     * @see ValueAdapter
+     */
+    public static <V> SourceValueBuilder<V, V> with(@NotNull ValueType<V> registeredType) {
+        return new ConfigValueBuilder<>(registeredType).from(registeredType);
+    }
+
     public static <V> ConfiguredValue<V> of(@NotNull V defaults) {
         return of(ValueType.of(defaults), () -> defaults);
     }
@@ -51,7 +91,7 @@ public class ConfiguredValue<V> extends CachedConfigValue<V> {
         );
     }
 
-    public static <V> ConfiguredValue<V> of(@NotNull ValueManifest<V> manifest,
+    public static <V> ConfiguredValue<V> of(@NotNull ValueManifest<V, V> manifest,
                                             @Nullable ValueParser<V> parser,
                                             @Nullable ValueSerializer<V> serializer) {
         ValueAdapter<V> adapter = new ValueAdapter<>(manifest.type());
@@ -60,13 +100,13 @@ public class ConfiguredValue<V> extends CachedConfigValue<V> {
         return of(manifest, adapter);
     }
 
-    public static <V> ConfiguredValue<V> of(@NotNull ValueManifest<V> manifest, @NotNull ValueAdapter<V> adapter) {
+    public static <V> ConfiguredValue<V> of(@NotNull ValueManifest<V, V> manifest, @NotNull ValueAdapter<V> adapter) {
         return new ConfiguredValue<>(manifest, adapter);
     }
 
     protected final @NotNull ValueAdapter<V> adapter;
 
-    public ConfiguredValue(@NotNull ValueManifest<V> manifest, @NotNull ValueAdapter<V> adapter) {
+    public ConfiguredValue(@NotNull ValueManifest<V, V> manifest, @NotNull ValueAdapter<V> adapter) {
         super(manifest);
         this.adapter = adapter;
     }
@@ -97,18 +137,19 @@ public class ConfiguredValue<V> extends CachedConfigValue<V> {
         if (!cacheExpired()) return getCachedOrDefault();
         // Data that is outdated and needs to be parsed again.
 
+        try {
             Object data = getData();
             if (data == null) return defaults();
 
             ValueParser<V> parser = parser();
             if (parser == null) return defaults(); // No parser, return default value.
 
-        try {
             // If there are no errors, update the cache and return.
-            return updateCache(parser.parse(holder(), type(), data));
+            V parsed = parser.parse(holder(), type(), data);
+            return updateCache(withValidated(parsed));
         } catch (Exception e) {
-            // There was a parsing error, prompted and returned the default value.
-            e.printStackTrace();
+            // There was a validate or parsing error, prompted and returned the default value.
+            throwing(e);
             return defaults();
         }
 
@@ -121,20 +162,20 @@ public class ConfiguredValue<V> extends CachedConfigValue<V> {
      * @param value The value to be set
      */
     @Override
-    public void set(V value) {
+    public void set(@Nullable V value) {
         updateCache(value); // Update cache
         if (value == null) {
             setData(null);
             return;
         }
 
+        try {
             ValueSerializer<V> serializer = serializer();
             if (serializer == null) return; // No serializer, do nothing.
 
-        try {
-            setData(serializer.serialize(holder(), type(), value));
+            setData(serializer.serialize(holder(), type(), withValidated(value)));
         } catch (Exception e) {
-            e.printStackTrace();
+            throwing(e);
         }
 
     }

demo/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>configured-parent</artifactId>
         <groupId>cc.carm.lib</groupId>
-        <version>4.1.0</version>
+        <version>4.1.2</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <properties>
@@ -13,6 +13,7 @@
         <maven.compiler.target>${project.jdk.version}</maven.compiler.target>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <maven.compiler.encoding>UTF-8</maven.compiler.encoding>
+
     </properties>
     <artifactId>configured-demo</artifactId>
     <packaging>jar</packaging>
@@ -40,6 +41,13 @@
             <scope>compile</scope>
         </dependency>
 
+        <dependency>
+            <groupId>${project.parent.groupId}</groupId>
+            <artifactId>configured-feature-validators</artifactId>
+            <version>${project.parent.version}</version>
+            <scope>compile</scope>
+        </dependency>
+
     </dependencies>
 
     <build>

demo/src/main/java/cc/carm/lib/configuration/demo/DatabaseConfiguration.java

@@ -3,7 +3,6 @@ package cc.carm.lib.configuration.demo;
 import cc.carm.lib.configuration.Configuration;
 import cc.carm.lib.configuration.annotation.ConfigPath;
 import cc.carm.lib.configuration.annotation.HeaderComments;
-import cc.carm.lib.configuration.value.ConfigValue;
 import cc.carm.lib.configuration.value.standard.ConfiguredValue;
 
 @HeaderComments({"", "数据库配置", "  用于提供数据库连接，进行数据库操作。"})
@@ -16,17 +15,17 @@ public interface DatabaseConfiguration extends Configuration {
             "- MySQL(新): com.mysql.cj.jdbc.Driver",
             "- MariaDB(推荐): org.mariadb.jdbc.Driver",
     })
-    ConfigValue<String> DRIVER_NAME = ConfiguredValue.of(
+    ConfiguredValue<String> DRIVER_NAME = ConfiguredValue.of(
             String.class, "com.mysql.cj.jdbc.Driver"
     );
 
-    ConfigValue<String> HOST = ConfiguredValue.of(String.class, "127.0.0.1");
-    ConfigValue<Integer> PORT = ConfiguredValue.of(Integer.class, 3306);
-    ConfigValue<String> DATABASE = ConfiguredValue.of(String.class, "minecraft");
-    ConfigValue<String> USERNAME = ConfiguredValue.of(String.class, "root");
-    ConfigValue<String> PASSWORD = ConfiguredValue.of(String.class, "password");
+    ConfiguredValue<String> HOST = ConfiguredValue.of(String.class, "127.0.0.1");
+    ConfiguredValue<Integer> PORT = ConfiguredValue.of(Integer.class, 3306);
+    ConfiguredValue<String> DATABASE = ConfiguredValue.of(String.class, "minecraft");
+    ConfiguredValue<String> USERNAME = ConfiguredValue.of(String.class, "root");
+    ConfiguredValue<String> PASSWORD = ConfiguredValue.of(String.class, "password");
 
-    ConfigValue<String> EXTRA = ConfiguredValue.of(String.class, "?useSSL=false");
+    ConfiguredValue<String> EXTRA = ConfiguredValue.of(String.class, "?useSSL=false");
 
     static String buildJDBC() {
         return String.format("jdbc:mysql://%s:%s/%s%s", HOST.get(), PORT.get(), DATABASE.get(), EXTRA.get());

demo/src/main/java/cc/carm/lib/configuration/demo/tests/conf/DemoConfiguration.java

@@ -4,7 +4,6 @@ import cc.carm.lib.configuration.Configuration;
 import cc.carm.lib.configuration.annotation.*;
 import cc.carm.lib.configuration.demo.tests.model.ItemStack;
 import cc.carm.lib.configuration.demo.tests.model.UserRecord;
-import cc.carm.lib.configuration.value.ConfigValue;
 import cc.carm.lib.configuration.value.standard.ConfiguredList;
 import cc.carm.lib.configuration.value.standard.ConfiguredMap;
 import cc.carm.lib.configuration.value.standard.ConfiguredValue;
@@ -26,15 +25,15 @@ public interface DemoConfiguration extends Configuration {
 
     @ConfigPath(root = true)
     @ConfigVersion(2)
-    ConfigValue<Double> VERSION = ConfiguredValue.of(Double.class, 2.0D);
+    ConfiguredValue<Double> VERSION = ConfiguredValue.of(Double.class, 2.0D);
 
     @ConfigPath(root = true)
     @FooterComments({"此处内容将显示在配置条目的下方", "可用于补充说明，但一般不建议使用"})
-    ConfigValue<Long> TEST_NUMBER = ConfiguredValue.of(1000000L);
+    ConfiguredValue<Long> TEST_NUMBER = ConfiguredValue.with(Long.class).defaults(123456789L).build();
 
     @HeaderComments({"枚举类型测试"})
     @FooterComments({"上述的枚举内容本质上是通过STRING解析的"})
-    ConfigValue<ChronoUnit> TEST_ENUM = ConfiguredValue.of(ChronoUnit.class, ChronoUnit.DAYS);
+    ConfiguredValue<ChronoUnit> TEST_ENUM = ConfiguredValue.of(ChronoUnit.class, ChronoUnit.DAYS);
 
     @HeaderComments({"空值测试"})
     @InlineComment("空值Inline注释")
@@ -72,7 +71,7 @@ public interface DemoConfiguration extends Configuration {
     class SUB implements Configuration {
 
         @ConfigPath(value = "uuid-value", root = true)
-        public static final ConfigValue<UUID> UUID_CONFIG_VALUE = ConfiguredValue
+        public static final ConfiguredValue<UUID> UUID_CONFIG_VALUE = ConfiguredValue
                 .builderOf(UUID.class).fromString()
                 .parse((holder, data) -> UUID.fromString(data))
                 .build();

demo/src/main/java/cc/carm/lib/configuration/demo/tests/conf/InstanceConfig.java

@@ -2,12 +2,13 @@ package cc.carm.lib.configuration.demo.tests.conf;
 
 import cc.carm.lib.configuration.Configuration;
 import cc.carm.lib.configuration.annotation.HeaderComments;
-import cc.carm.lib.configuration.value.ConfigValue;
+import cc.carm.lib.configuration.annotation.ValueRange;
 import cc.carm.lib.configuration.value.standard.ConfiguredValue;
 
-@HeaderComments("Inner Test")
+@HeaderComments("service")
 public class InstanceConfig implements Configuration {
 
-    public final ConfigValue<Double> STATUS = ConfiguredValue.of(1.0D);
+    @ValueRange(min = 0, max = 100, message = "The value must be between 0 and 100")
+    public final ConfiguredValue<Double> STATUS = ConfiguredValue.of(1.0D);
 
 }

demo/src/main/java/cc/carm/lib/configuration/demo/tests/conf/RegistryConfig.java

@@ -6,7 +6,6 @@ import cc.carm.lib.configuration.annotation.FooterComments;
 import cc.carm.lib.configuration.annotation.HeaderComments;
 import cc.carm.lib.configuration.annotation.InlineComment;
 import cc.carm.lib.configuration.demo.tests.model.UserRecord;
-import cc.carm.lib.configuration.value.ConfigValue;
 import cc.carm.lib.configuration.value.standard.ConfiguredValue;
 
 import java.util.UUID;
@@ -20,7 +19,7 @@ public class RegistryConfig implements Configuration {
     @FooterComments({"12313213212"})
     @InlineComment(value = "用户名(匹配注释)", regex = "name") // 通过注解给配置添加注释。
     @InlineComment(value = "信息", regex = {"info.*", "info.game.*"}) // 通过注解给配置添加注释。
-    public final ConfigValue<UserRecord> OWNER = ConfiguredValue.builderOf(UserRecord.class).fromSection()
+    public final ConfiguredValue<UserRecord> OWNER = ConfiguredValue.builderOf(UserRecord.class).fromSection()
             .defaults(new UserRecord("Carm", UUID.randomUUID()))
             .parse((holder, section) -> UserRecord.deserialize(section))
             .serialize((holder, data) -> data.serialize()).build();

demo/src/main/java/cc/carm/lib/configuration/demo/tests/model/ItemStack.java

@@ -33,11 +33,11 @@ public class ItemStack {
         return amount;
     }
 
-    public String getName() {
+    public @Nullable String getName() {
         return name;
     }
 
-    public List<String> getLore() {
+    public @Nullable List<String> getLore() {
         return lore;
     }
 
@@ -49,11 +49,11 @@ public class ItemStack {
         this.amount = amount;
     }
 
-    public void setName(String name) {
+    public void setName(@Nullable String name) {
         this.name = name;
     }
 
-    public void setLore(List<String> lore) {
+    public void setLore(@Nullable List<String> lore) {
         this.lore = lore;
     }
 

features/commentable/pom.xml

@@ -6,7 +6,7 @@
     <parent>
         <groupId>cc.carm.lib</groupId>
         <artifactId>configured-parent</artifactId>
-        <version>4.1.0</version>
+        <version>4.1.2</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <properties>

features/file/pom.xml

@@ -6,7 +6,7 @@
     <parent>
         <groupId>cc.carm.lib</groupId>
         <artifactId>configured-parent</artifactId>
-        <version>4.1.0</version>
+        <version>4.1.2</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <properties>

features/section/pom.xml

@@ -6,7 +6,7 @@
     <parent>
         <groupId>cc.carm.lib</groupId>
         <artifactId>configured-parent</artifactId>
-        <version>4.1.0</version>
+        <version>4.1.2</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <properties>

features/section/src/main/java/cc/carm/lib/configuration/source/section/ImmutableSection.java

@@ -166,12 +166,12 @@ public class ImmutableSection implements ConfigureSection {
     }
 
     @Override
-    public <T> @Nullable T get(@NotNull String path, @Nullable T defaults, @NotNull Class<T> clazz) {
+    public <T> @Nullable T get(@NotNull String path, T defaults, @NotNull Class<T> clazz) {
         return raw().get(path, defaults, clazz);
     }
 
     @Override
-    public <T> @Nullable T get(@NotNull String path, @Nullable T defaultValue, @NotNull DataFunction<Object, T> parser) {
+    public <T> @Nullable T get(@NotNull String path, T defaultValue, @NotNull DataFunction<Object, T> parser) {
         return raw().get(path, defaultValue, parser);
     }
 

features/text/pom.xml

@@ -6,7 +6,7 @@
     <parent>
         <groupId>cc.carm.lib</groupId>
         <artifactId>configured-parent</artifactId>
-        <version>4.1.0</version>
+        <version>4.1.2</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <properties>

features/text/src/main/java/cc/carm/lib/configuration/value/text/ConfiguredText.java

@@ -7,7 +7,6 @@ import cc.carm.lib.configuration.source.ConfigurationHolder;
 import cc.carm.lib.configuration.value.ValueManifest;
 import cc.carm.lib.configuration.value.standard.ConfiguredValue;
 import cc.carm.lib.configuration.value.text.data.TextContents;
-import cc.carm.lib.configuration.value.text.function.TextDispatcher;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
@@ -22,7 +21,7 @@ import java.util.function.Consumer;
  */
 public class ConfiguredText<MSG, RECEIVER> extends ConfiguredValue<TextContents> {
 
-    public static <M, R> Builder<M, R, ?> builder() {
+    public static <M, R> Builder<M, R, ?> create() {
         return new StardardBuilder<>();
     }
 
@@ -38,7 +37,7 @@ public class ConfiguredText<MSG, RECEIVER> extends ConfiguredValue<TextContents>
 
     protected final @NotNull String[] params; // The parameters of the message.
 
-    public ConfiguredText(@NotNull ValueManifest<TextContents> manifest,
+    public ConfiguredText(@NotNull ValueManifest<TextContents, TextContents> manifest,
                           @NotNull BiFunction<RECEIVER, String, String> parser,
                           @NotNull BiFunction<RECEIVER, String, MSG> compiler,
                           @NotNull BiConsumer<RECEIVER, List<MSG>> dispatcher,
@@ -50,7 +49,7 @@ public class ConfiguredText<MSG, RECEIVER> extends ConfiguredValue<TextContents>
         this.params = params;
     }
 
-    public TextDispatcher<MSG, RECEIVER, ?> prepare(@NotNull Object... values) {
+    public PreparedText<MSG, RECEIVER> prepare(@NotNull Object... values) {
         return new PreparedText<MSG, RECEIVER>(resolve(), this.params)
                 .parser(this.parser).compiler(this.compiler)
                 .dispatcher(this.dispatcher).placeholders(values);
@@ -121,7 +120,7 @@ public class ConfiguredText<MSG, RECEIVER> extends ConfiguredValue<TextContents>
     }
 
     public abstract static class Builder<MSG, RECEIVER, SELF extends Builder<MSG, RECEIVER, SELF>>
-            extends AbstractConfigBuilder<TextContents, ConfiguredText<MSG, RECEIVER>, ConfigurationHolder<?>, SELF> {
+            extends AbstractConfigBuilder<TextContents, TextContents, ConfiguredText<MSG, RECEIVER>, ConfigurationHolder<?>, SELF> {
         protected @NotNull TextContents.Builder defaultBuilder = TextContents.builder();
         protected @NotNull String[] params = new String[0];
 

features/text/src/main/java/cc/carm/lib/configuration/value/text/function/ContentHandler.java

@@ -1,52 +1,27 @@
 package cc.carm.lib.configuration.value.text.function;
 
 import cc.carm.lib.configuration.value.text.data.TextContents;
+import cc.carm.lib.configuration.value.text.function.common.AppendLineInserter;
+import cc.carm.lib.configuration.value.text.function.common.OptionalLineInserter;
+import cc.carm.lib.configuration.value.text.function.common.ParamReplacer;
+import cc.carm.lib.configuration.value.text.function.inserter.ContentInserter;
+import cc.carm.lib.configuration.value.text.function.inserter.Insertable;
+import cc.carm.lib.configuration.value.text.function.replacer.ContentReplacer;
+import cc.carm.lib.configuration.value.text.function.replacer.Replaceable;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
-import java.util.*;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
 import java.util.function.BiFunction;
 import java.util.function.Consumer;
 import java.util.function.Function;
 import java.util.function.UnaryOperator;
-import java.util.regex.Matcher;
-import java.util.regex.Pattern;
-import java.util.stream.IntStream;
 
-public abstract class ContentHandler<RECEIVER, SELF extends ContentHandler<RECEIVER, SELF>> {
-
-    /**
-     * Used to match the message insertion.
-     * <p>
-     * format:
-     * <br>- to insert parsed line {prefix}#content-id#{offset-above,offset-down}
-     * <br>- to insert original line {prefix}@content-id@{offset-above,offset-down}
-     * <br>  original lines will not be parsed
-     * <br> example:
-     * <ul>
-     *     <li>{- }#content-id#{1,1}</li>
-     *     <li>@content-id@{1,1}</li>
-     * </ul>
-     */
-    public static final @NotNull Pattern INSERT_PATTERN = Pattern.compile(
-            "^(?:\\{(?<prefix>.*)})?(?<type>[#@])(?<id>.*)[#@](?:\\{(?<above>-?\\d+)(?:,(?<down>-?\\d+))?})?$"
-    );
-
-    /**
-     * Used to match the message which can be inserted
-     * <p>
-     * format:
-     * <br>- ?[id]Message content
-     * <br> example:
-     * <ul>
-     *     <li>?[click]Click to use this item!</li>
-     * </ul>
-     */
-    public static final @NotNull Pattern ENABLE_PATTERN = Pattern.compile(
-            "^\\?\\[(?<id>.+)](?<content>.*)$"
-    );
-
-    public static final @NotNull UnaryOperator<String> DEFAULT_PARAM_BUILDER = s -> "%(" + s + ")";
+public abstract class ContentHandler<RECEIVER, SELF extends ContentHandler<RECEIVER, SELF>>
+        implements Replaceable<RECEIVER, SELF>, Insertable<RECEIVER, SELF> {
 
     protected BiFunction<RECEIVER, String, String> parser = (receiver, value) -> value;
     protected String lineSeparator = System.lineSeparator();
@@ -54,16 +29,24 @@ public abstract class ContentHandler<RECEIVER, SELF extends ContentHandler<RECEI
     /**
      * Used to store the placeholders of the message
      */
-    protected @NotNull Map<String, Object> placeholders = new HashMap<>();
-    protected @NotNull UnaryOperator<String> paramFormatter = DEFAULT_PARAM_BUILDER;
+    protected @NotNull ParamReplacer<RECEIVER> paramReplacer = ParamReplacer.defaults();
     protected @NotNull String[] params;
 
+    protected @NotNull List<ContentReplacer<RECEIVER>> replacers = new ArrayList<>();
+    protected @NotNull List<ContentInserter<RECEIVER>> inserters = new ArrayList<>();
+
     /**
      * Used to store the insertion of the message
      */
-    protected @NotNull Map<String, @Nullable Function<RECEIVER, List<String>>> insertion = new HashMap<>();
+    protected final @NotNull Map<String, @Nullable Function<RECEIVER, List<String>>> insertion = new HashMap<>();
     protected boolean disableInsertion = false;
 
+    public ContentHandler() {
+        inserters.add(new AppendLineInserter<>(0));
+        inserters.add(new OptionalLineInserter<>(0));
+    }
+
+
     public abstract SELF self();
 
     /**
@@ -87,6 +70,11 @@ public abstract class ContentHandler<RECEIVER, SELF extends ContentHandler<RECEI
         return self();
     }
 
+    @Override
+    public boolean noneInsertion() {
+        return this.insertion.isEmpty();
+    }
+
     /**
      * Set the line separator for the text.
      *
@@ -106,7 +94,7 @@ public abstract class ContentHandler<RECEIVER, SELF extends ContentHandler<RECEI
      * @return the current {@link ContentHandler} instance
      */
     public SELF placeholders(@NotNull Map<String, Object> placeholders) {
-        this.placeholders = placeholders;
+        this.paramReplacer.set(placeholders);
         return self();
     }
 
@@ -117,7 +105,7 @@ public abstract class ContentHandler<RECEIVER, SELF extends ContentHandler<RECEI
      * @return the current {@link ContentHandler} instance
      */
     public SELF placeholders(@NotNull Consumer<Map<String, Object>> consumer) {
-        consumer.accept(this.placeholders);
+        consumer.accept(this.paramReplacer.placeholders());
         return self();
     }
 
@@ -128,7 +116,8 @@ public abstract class ContentHandler<RECEIVER, SELF extends ContentHandler<RECEI
      * @return the current {@link ContentHandler} instance
      */
     public SELF placeholders(@Nullable Object... values) {
-        return placeholders(map -> map.putAll(buildParams(this.paramFormatter, this.params, values)));
+        this.paramReplacer.putAll(this.params, values);
+        return self();
     }
 
     /**
@@ -139,7 +128,7 @@ public abstract class ContentHandler<RECEIVER, SELF extends ContentHandler<RECEI
      * @return the current {@link ContentHandler} instance
      */
     public SELF placeholder(@NotNull String key, @Nullable Object value) {
-        this.placeholders.put(paramFormatter.apply(key), value);
+        this.paramReplacer.put(key, value);
         return self();
     }
 
@@ -155,49 +144,52 @@ public abstract class ContentHandler<RECEIVER, SELF extends ContentHandler<RECEI
         return self();
     }
 
-    /**
-     * Insert the specific contents by the id.
-     *
-     * @param id the id of the insertion text
-     * @return the current {@link ContentHandler} instance
-     */
-    public SELF insert(@NotNull String id) {
-        this.insertion.put(id, null);
+    @Override
+    public List<ContentReplacer<RECEIVER>> replacers() {
+        return this.replacers;
+    }
+
+    @Override
+    public SELF replacer(@NotNull ContentReplacer<RECEIVER> replacer) {
+        this.replacers.add(replacer);
+        this.replacers.sort(ContentReplacer::compareTo);
         return self();
     }
 
-    /**
-     * Insert the specific contents by the id.
-     *
-     * @param id            the id of the insertion text
-     * @param linesSupplier to supply the lines to insert
-     * @return the current {@link ContentHandler} instance
-     */
-    public SELF insert(@NotNull String id, @NotNull Function<RECEIVER, List<String>> linesSupplier) {
-        this.insertion.put(id, linesSupplier);
+    @Override
+    public List<ContentInserter<RECEIVER>> inserters() {
+        return this.inserters;
+    }
+
+    @Override
+    public SELF inserter(@NotNull ContentInserter<RECEIVER> inserter) {
+        this.inserters.add(inserter);
+        this.inserters.sort(ContentInserter::compareTo);
         return self();
     }
 
-    /**
-     * Insert the specific contents by the id.
-     *
-     * @param id    the id of the insertion text
-     * @param lines the lines to insert
-     * @return the current {@link ContentHandler} instance
-     */
-    public SELF insert(@NotNull String id, @NotNull String... lines) {
-        return insert(id, Arrays.asList(lines));
+    @Override
+    public SELF insert(@NotNull String id, @Nullable Function<RECEIVER, List<String>> supplier) {
+        this.insertion.put(id, supplier);
+        return self();
     }
 
-    /**
-     * Insert the specific contents by the id.
-     *
-     * @param id    the id of the insertion text
-     * @param lines the lines to insert
-     * @return the current {@link ContentHandler} instance
-     */
-    public SELF insert(@NotNull String id, @NotNull List<String> lines) {
-        return insert(id, receiver -> lines);
+    @Override
+    public boolean inserting(@NotNull String id) {
+        return this.insertion.keySet().stream().anyMatch(key -> key.equalsIgnoreCase(id));
+    }
+
+    @Override
+    public @Nullable List<String> getInsertion(@NotNull String id, @Nullable RECEIVER receiver) {
+        Function<RECEIVER, List<String>> function = this.insertion.get(id);
+        if (function == null) return null;
+        return function.apply(receiver);
+    }
+
+    @Override
+    public SELF removeInsert(@NotNull String id) {
+        this.insertion.remove(id);
+        return self();
     }
 
     /**
@@ -219,73 +211,41 @@ public abstract class ContentHandler<RECEIVER, SELF extends ContentHandler<RECEI
      * @return the parsed text
      */
     protected @Nullable String parse(@Nullable RECEIVER receiver, @NotNull String text) {
-        return this.parser.apply(receiver, setPlaceholders(text, this.placeholders));
+        text = applyReplacements(receiver, text); // First, apply the custom replacements
+        text = this.paramReplacer.replace(text, receiver); // Then, apply the static placeholders
+        return this.parser.apply(receiver, text); // Finally, parse the text
     }
 
     public void handle(@NotNull TextContents contents, @Nullable RECEIVER receiver,
                        @NotNull Consumer<String> lineConsumer) {
         if (contents.isEmpty()) return; // Nothing to parse
 
-        if (this.disableInsertion) {
+        if (this.disableInsertion || noneInsertion()) {
             contents.lines().forEach(line -> lineConsumer.accept(parse(receiver, line)));
             return; // Simple parsed
         }
 
+        // Set the default insertion of the text
+        for (Map.Entry<String, @Nullable Function<RECEIVER, List<String>>> entry : this.insertion.entrySet()) {
+            if (entry.getValue() != null) continue;
+            List<String> lines = contents.optionalLines().get(entry.getKey());
+            if (lines == null) continue;
+            entry.setValue(r -> lines);
+        }
+
+        lines:
         for (String line : contents.lines()) {
-            Matcher insertMatcher = INSERT_PATTERN.matcher(line);
-            if (insertMatcher.matches()) {
-                doInsert(insertMatcher, receiver, lineConsumer);
-                continue;
+            for (ContentInserter<RECEIVER> inserter : inserters) {
+                List<String> inserted = inserter.handle(receiver, line, this);
+                if (inserted != null) { // Found the insertion
+                    inserted.forEach(l -> lineConsumer.accept(parse(receiver, l)));
+                    continue lines; // Go to the next line
                 }
-
-            Matcher enableMatcher = ENABLE_PATTERN.matcher(line);
-            if (enableMatcher.matches()) {
-                if (this.insertion.containsKey(enableMatcher.group("id"))) {
-                    lineConsumer.accept(parse(receiver, enableMatcher.group("content")));
             }
-                continue;
-            }
-
             lineConsumer.accept(parse(receiver, line));
         }
     }
 
-    private void doInsert(Matcher matcher, @Nullable RECEIVER receiver,
-                          @NotNull Consumer<String> lineConsumer) {
-        String id = matcher.group("id");
-        List<String> values = Optional.ofNullable(this.insertion.get(id))
-                .map(f -> f.apply(receiver))
-                .orElse(null);
-        if (values == null || values.isEmpty()) return; // No values to insert
-
-        String prefix = matcher.group("prefix");
-        String type = matcher.group("type");
-        boolean original = type.equals("@");
-        int offsetAbove = Optional.ofNullable(matcher.group("above"))
-                .map(Integer::parseInt).orElse(0);
-        int offsetDown = Optional.ofNullable(matcher.group("down"))
-                .map(Integer::parseInt).orElse(offsetAbove); // If offsetDown is not set, use offsetAbove
-
-        IntStream.range(0, Math.max(0, offsetAbove)).mapToObj(i -> "").forEach(lineConsumer);
-        String prefixContent = Optional.ofNullable(prefix).map(p -> parse(receiver, p)).orElse("");
-        if (original) {
-            values.stream().map(value -> prefixContent + value).forEach(lineConsumer);
-        } else {
-            values.stream().map(value -> prefixContent + parse(receiver, value)).forEach(lineConsumer);
-        }
-        IntStream.range(0, Math.max(0, offsetDown)).mapToObj(i -> "").forEach(lineConsumer);
-    }
-
-    public static String setPlaceholders(@NotNull String messages,
-                                         @NotNull Map<String, Object> placeholders) {
-        if (messages.isEmpty()) return messages;
-        String parsed = messages;
-        for (Map.Entry<String, Object> entry : placeholders.entrySet()) {
-            parsed = parsed.replace(entry.getKey(), entry.getValue() == null ? "" : entry.getValue().toString());
-        }
-        return parsed;
-    }
-
     public static Map<String, Object> buildParams(@NotNull UnaryOperator<String> paramBuilder,
                                                   @Nullable String[] params, @Nullable Object[] values) {
         Map<String, Object> map = new HashMap<>();

features/text/src/main/java/cc/carm/lib/configuration/value/text/function/common/AppendLineInserter.java

@@ -0,0 +1,67 @@
+package cc.carm.lib.configuration.value.text.function.common;
+
+import cc.carm.lib.configuration.value.text.function.inserter.ContentInserter;
+import cc.carm.lib.configuration.value.text.function.inserter.Insertable;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+import java.util.Optional;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+import java.util.stream.IntStream;
+
+public class AppendLineInserter<RECEIVER> extends ContentInserter<RECEIVER> {
+
+    /**
+     * Used to match the message insertion.
+     * <p>
+     * format:
+     * <br>- to insert parsed line {prefix}#content-id#{offset-above,offset-down}
+     * <br>- to insert original line {prefix}@content-id@{offset-above,offset-down}
+     * <br>  original lines will not be parsed
+     * <br> example:
+     * <ul>
+     *     <li>{- }#content-id#{1,1}</li>
+     *     <li>@content-id@{1,1}</li>
+     * </ul>
+     */
+    public static final @NotNull Pattern APPEND_PATTERN = Pattern.compile(
+            "^(?:\\{(?<prefix>.*)})?#(?<id>.*)#(?:\\{(?<above>-?\\d+)(?:,(?<down>-?\\d+))?})?$"
+    );
+
+    public AppendLineInserter(int priority) {
+        super(priority, APPEND_PATTERN);
+    }
+
+    @Override
+    protected @Nullable String extractID(@NotNull Matcher matcher) {
+        return matcher.group("id");
+    }
+
+    @Override
+    protected @NotNull List<String> get(@Nullable RECEIVER receiver, @NotNull Matcher matcher,
+                                        @NotNull Insertable<RECEIVER, ?> insertion) {
+        String id = extractID(matcher);
+        List<String> values = insertion.getInsertion(id, receiver);
+        if (values == null || values.isEmpty()) return Collections.emptyList(); // No values to insert
+
+        String prefix = Optional.ofNullable(matcher.group("prefix")).orElse("");
+        int offsetAbove = Optional.ofNullable(matcher.group("above"))
+                .map(Integer::parseInt).orElse(0);
+        int offsetDown = Optional.ofNullable(matcher.group("down"))
+                .map(Integer::parseInt).orElse(offsetAbove); // If offsetDown is not set, use offsetAbove
+
+        List<String> contents = new ArrayList<>();
+
+        IntStream.range(0, Math.max(0, offsetAbove)).mapToObj(i -> "").forEach(contents::add);
+        values.stream().map(value -> prefix + value).forEach(contents::add);
+        IntStream.range(0, Math.max(0, offsetDown)).mapToObj(i -> "").forEach(contents::add);
+
+        return contents;
+    }
+
+
+}

features/text/src/main/java/cc/carm/lib/configuration/value/text/function/common/OptionalLineInserter.java

@@ -0,0 +1,46 @@
+package cc.carm.lib.configuration.value.text.function.common;
+
+import cc.carm.lib.configuration.value.text.function.inserter.ContentInserter;
+import cc.carm.lib.configuration.value.text.function.inserter.Insertable;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class OptionalLineInserter<RECEIVER> extends ContentInserter<RECEIVER> {
+
+    /**
+     * Used to match the message which can be inserted
+     * <p>
+     * format:
+     * <br>- ?[id]Message content
+     * <br> example:
+     * <ul>
+     *     <li>?[click]Click to use this item!</li>
+     * </ul>
+     */
+    public static final @NotNull Pattern OPTIONAL_PATTERN = Pattern.compile(
+            "^\\?\\[(?<id>.+)](?<content>.*)$"
+    );
+
+    public OptionalLineInserter(int priority) {
+        super(priority, OPTIONAL_PATTERN);
+    }
+
+    @Override
+    protected @Nullable String extractID(@NotNull Matcher matcher) {
+        return matcher.group("id");
+    }
+
+    @Override
+    protected @NotNull List<String> get(@Nullable RECEIVER receiver, @NotNull Matcher matcher,
+                                        @NotNull Insertable<RECEIVER, ?> insertion) {
+        String content = matcher.group("content");
+        if (content == null) return Collections.emptyList();
+        return Collections.singletonList(content);
+    }
+
+}

features/text/src/main/java/cc/carm/lib/configuration/value/text/function/common/ParamReplacer.java

@@ -0,0 +1,71 @@
+package cc.carm.lib.configuration.value.text.function.common;
+
+import cc.carm.lib.configuration.value.text.function.replacer.ContentReplacer;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.function.Function;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class ParamReplacer<RECEIVER> extends ContentReplacer<RECEIVER> {
+
+    public static final @NotNull Pattern DEFAULT_PARAM_PATTERN = Pattern.compile("%\\((?<id>[^)]+)\\)");
+
+    public static <R> ParamReplacer<R> defaults() {
+        return create(DEFAULT_PARAM_PATTERN, m -> m.group("id"));
+    }
+
+    public static <R> ParamReplacer<R> create(@NotNull Pattern pattern, @NotNull Function<Matcher, String> extractor) {
+        return new ParamReplacer<>(0, pattern, extractor);
+    }
+
+    protected final @NotNull Function<Matcher, @Nullable String> extractor;
+    protected @NotNull Map<String, Object> placeholders = new HashMap<>();
+
+    public ParamReplacer(int priority, @NotNull Pattern pattern, @NotNull Function<Matcher, String> extractor) {
+        super(priority, pattern);
+        this.extractor = extractor;
+    }
+
+    public @NotNull Map<String, Object> placeholders() {
+        return placeholders;
+    }
+
+    @Override
+    protected @Nullable String get(@NotNull RECEIVER receiver, @NotNull Matcher matcher) {
+        @Nullable String id = extractor.apply(matcher);
+        if (id == null) return null;
+        Object value = placeholders.get(id);
+        if (value == null) return null;
+        return value.toString();
+    }
+
+    public void set(@NotNull Map<String, Object> placeholders) {
+        this.placeholders = placeholders;
+    }
+
+    public void put(@NotNull String id, @Nullable Object value) {
+        placeholders.put(id, value);
+    }
+
+    public void remove(@NotNull String id) {
+        placeholders.remove(id);
+    }
+
+    public void putAll(@NotNull Map<String, Object> placeholders) {
+        this.placeholders.putAll(placeholders);
+    }
+
+    public void putAll(@NotNull String[] params, @NotNull Object[] values) {
+        for (int i = 0; i < params.length; i++) {
+            placeholders.put(params[i], (values != null && values.length > i) ? values[i] : "?");
+        }
+    }
+
+    public void clear() {
+        placeholders.clear();
+    }
+}

features/text/src/main/java/cc/carm/lib/configuration/value/text/function/inserter/ContentInserter.java

@@ -0,0 +1,51 @@
+package cc.carm.lib.configuration.value.text.function.inserter;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Collections;
+import java.util.List;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public abstract class ContentInserter<RECEIVER> implements Comparable<ContentInserter<RECEIVER>> {
+
+    protected final int priority;
+    protected @NotNull Pattern pattern;
+
+    public ContentInserter(int priority, @NotNull Pattern pattern) {
+        this.priority = priority;
+        this.pattern = pattern;
+    }
+
+    public int priority() {
+        return priority;
+    }
+
+    public void setPattern(@NotNull Pattern pattern) {
+        this.pattern = pattern;
+    }
+
+    public @NotNull Matcher matcher(@NotNull String text) {
+        return pattern.matcher(text);
+    }
+
+    protected abstract @Nullable String extractID(@NotNull Matcher matcher);
+
+    protected abstract @NotNull List<String> get(@Nullable RECEIVER receiver, @NotNull Matcher matcher,
+                                                 @NotNull Insertable<RECEIVER, ?> insertions);
+
+    public @Nullable List<String> handle(@Nullable RECEIVER receiver, @NotNull String line,
+                                         @NotNull Insertable<RECEIVER, ?> insertions) {
+        Matcher matcher = matcher(line);
+        if (!matcher.matches()) return null;
+        if (!insertions.inserting(extractID(matcher))) return Collections.emptyList();
+        return get(receiver, matcher, insertions);
+    }
+
+    @Override
+    public int compareTo(@NotNull ContentInserter<RECEIVER> o) {
+        return Integer.compare(o.priority, priority);
+    }
+
+}

features/text/src/main/java/cc/carm/lib/configuration/value/text/function/inserter/Insertable.java

@@ -0,0 +1,66 @@
+package cc.carm.lib.configuration.value.text.function.inserter;
+
+import cc.carm.lib.configuration.value.text.function.ContentHandler;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.function.Function;
+
+public interface Insertable<RECEIVER, SELF> {
+
+    List<ContentInserter<RECEIVER>> inserters();
+
+    SELF inserter(@NotNull ContentInserter<RECEIVER> inserter);
+
+    boolean noneInsertion();
+
+    boolean inserting(@NotNull String id);
+
+    @Nullable List<String> getInsertion(@NotNull String id, @Nullable RECEIVER receiver);
+
+    /**
+     * Insert the specific contents by the id.
+     *
+     * @param id       the id of the insertion text
+     * @param supplier to supply the lines to insert
+     * @return the current {@link ContentHandler} instance
+     */
+    SELF insert(@NotNull String id, @Nullable Function<RECEIVER, List<String>> supplier);
+
+    /**
+     * Insert the specific contents by the id.
+     *
+     * @param id the id of the insertion text
+     * @return the current {@link ContentHandler} instance
+     */
+    default SELF insert(@NotNull String id) {
+        return insert(id, (Function<RECEIVER, List<String>>) null);
+    }
+
+    /**
+     * Insert the specific contents by the id.
+     *
+     * @param id       the id of the insertion text
+     * @param contents the lines to insert
+     * @return the current {@link ContentHandler} instance
+     */
+    default SELF insert(@NotNull String id, @NotNull List<String> contents) {
+        return insert(id, receiver -> contents);
+    }
+
+    /**
+     * Insert the specific contents by the id.
+     *
+     * @param id       the id of the insertion text
+     * @param contents the lines to insert
+     * @return the current {@link ContentHandler} instance
+     */
+    default SELF insert(@NotNull String id, @NotNull String... contents) {
+        return insert(id, Arrays.asList(contents));
+    }
+
+    SELF removeInsert(@NotNull String id);
+
+}

features/text/src/main/java/cc/carm/lib/configuration/value/text/function/replacer/ContentReplacer.java

@@ -0,0 +1,105 @@
+package cc.carm.lib.configuration.value.text.function.replacer;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.function.BiFunction;
+import java.util.function.Function;
+import java.util.function.Supplier;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public abstract class ContentReplacer<RECEIVER> implements Comparable<ContentReplacer<RECEIVER>> {
+
+    public static <R> ContentReplacer.Builder<R> match(@NotNull Pattern pattern) {
+        return new Builder<>(pattern);
+    }
+
+    public static <R> ContentReplacer.Builder<R> match(@NotNull String pattern) {
+        return match(Pattern.compile(pattern));
+    }
+
+    public static <R> ContentReplacer.Builder<R> replace(@NotNull String text) {
+        return match(Pattern.quote(text));
+    }
+
+    protected final int priority;
+    protected @NotNull Pattern pattern;
+
+    public ContentReplacer(int priority, @NotNull Pattern pattern) {
+        this.priority = priority;
+        this.pattern = pattern;
+    }
+
+    public int priority() {
+        return priority;
+    }
+
+    public void pattern(@NotNull Pattern pattern) {
+        this.pattern = pattern;
+    }
+
+    public @NotNull Matcher matcher(@NotNull String text) {
+        return pattern.matcher(text);
+    }
+
+    public String replace(@NotNull String text, @Nullable RECEIVER receiver) {
+        Matcher matcher = matcher(text);
+        StringBuffer sb = new StringBuffer();
+        while (matcher.find()) {
+            String replaced = get(receiver, matcher);
+            matcher.appendReplacement(sb, replaced == null ? "" : replaced);
+        }
+        matcher.appendTail(sb);
+        return sb.toString();
+    }
+
+    protected abstract @Nullable String get(@Nullable RECEIVER receiver, @NotNull Matcher matcher);
+
+    @Override
+    public int compareTo(@NotNull ContentReplacer<RECEIVER> o) {
+        return Integer.compare(o.priority, this.priority);
+    }
+
+    public static class Builder<R> {
+
+        protected final @NotNull Pattern pattern;
+        protected int priority = 0;
+
+        public Builder(@NotNull Pattern pattern) {
+            this.pattern = pattern;
+        }
+
+        public @NotNull Builder<R> priority(int priority) {
+            this.priority = priority;
+            return this;
+        }
+
+        public @NotNull ContentReplacer<R> to(BiFunction<@Nullable R, @NotNull Matcher, @Nullable String> supplier) {
+            return new ContentReplacer<R>(this.priority, this.pattern) {
+                @Override
+                protected @Nullable String get(@NotNull R receiver, @NotNull Matcher matcher) {
+                    return supplier.apply(receiver, matcher);
+                }
+            };
+        }
+
+        public @NotNull ContentReplacer<R> to(Function<@Nullable R, @Nullable String> supplier) {
+            return to((receiver, matchedParam) -> supplier.apply(receiver));
+        }
+
+        public @NotNull ContentReplacer<R> to(Supplier<@Nullable String> supplier) {
+            return to((receiver, matchedParam) -> supplier.get());
+        }
+
+        public @NotNull ContentReplacer<R> to(@NotNull String content) {
+            return to(() -> content);
+        }
+
+    }
+
+    @FunctionalInterface
+    public interface Constructor<R> extends Function<ContentReplacer.Builder<R>, ContentReplacer<R>> {
+    }
+
+}

features/text/src/main/java/cc/carm/lib/configuration/value/text/function/replacer/Replaceable.java

@@ -0,0 +1,63 @@
+package cc.carm.lib.configuration.value.text.function.replacer;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.List;
+import java.util.function.BiFunction;
+import java.util.function.Function;
+import java.util.function.Supplier;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public interface Replaceable<RECEIVER, SELF> {
+
+    List<ContentReplacer<RECEIVER>> replacers();
+
+    default String applyReplacements(@Nullable RECEIVER receiver, @NotNull String text) {
+        for (ContentReplacer<RECEIVER> replacer : replacers()) {
+            text = replacer.replace(text, receiver);
+        }
+        return text;
+    }
+
+    SELF replacer(@NotNull ContentReplacer<RECEIVER> replacer);
+
+    default SELF replacer(@NotNull Pattern pattern, @NotNull ContentReplacer.Constructor<RECEIVER> constructor) {
+        ContentReplacer.Builder<RECEIVER> builder = ContentReplacer.match(pattern);
+        return replacer(constructor.apply(builder));
+    }
+
+    default SELF replace(@NotNull Pattern pattern,
+                         @NotNull BiFunction<@Nullable RECEIVER, @NotNull Matcher, @Nullable String> supplier) {
+        return replacer(pattern, builder -> builder.to(supplier));
+    }
+
+    default SELF replace(@NotNull Pattern pattern,
+                         @NotNull Function<@Nullable RECEIVER, @Nullable String> supplier) {
+        return replacer(pattern, builder -> builder.to(supplier));
+    }
+
+    default SELF replace(@NotNull Pattern pattern,
+                         @NotNull Supplier<@Nullable String> supplier) {
+        return replacer(pattern, builder -> builder.to(supplier));
+    }
+
+    default SELF replace(@NotNull Pattern pattern, @NotNull String replacement) {
+        return replacer(pattern, builder -> builder.to(replacement));
+    }
+
+    default SELF replace(@NotNull String text, @NotNull String replacement) {
+        return replacer(Pattern.compile(Pattern.quote(text)), builder -> builder.to(replacement));
+    }
+
+    default SELF replace(@NotNull String text, @NotNull Supplier<@Nullable String> supplier) {
+        return replacer(Pattern.compile(Pattern.quote(text)), builder -> builder.to(supplier));
+    }
+
+    default SELF replace(@NotNull String text,
+                         @NotNull Function<@Nullable RECEIVER, @Nullable String> supplier) {
+        return replacer(Pattern.compile(Pattern.quote(text)), builder -> builder.to(supplier));
+    }
+
+}

features/text/src/test/java/cc/carm/lib/configuration/value/text/tests/ConfigTest.java

@@ -7,17 +7,16 @@ import cc.carm.lib.configuration.value.text.tests.conf.AppMessages;
 import org.junit.Test;
 
 import java.io.File;
+import java.util.List;
 
 public class ConfigTest {
 
-
     public static final String[] WEBSITES = new String[]{
             "https://carm.cc",
             "https://www.baidu.com",
             "https://www.google.com"
     };
 
-
     @Test
     public void test() {
 
@@ -27,11 +26,11 @@ public class ConfigTest {
 
         System.out.println("--------------------------");
 
-        AppMessages.WELCOME.prepare()
+        List<String> str = AppMessages.WELCOME.prepare()
                 .placeholders("Carm")
                 .insert("guidance")
                 .insert("websites", WEBSITES)
-                .to(System.out);
+                .compile(System.out);
 
         System.out.println("--------------------------");
 

features/text/src/test/java/cc/carm/lib/configuration/value/text/tests/ParseTest.java

@@ -7,6 +7,7 @@ import org.junit.Test;
 import java.io.PrintStream;
 import java.util.*;
 
+
 public class ParseTest {
 
 
@@ -18,14 +19,15 @@ public class ParseTest {
         lines.add("#more-creating#{1}");
         lines.add("This is a test message");
         lines.add("#guidance#");
-        lines.add("{- }#websites#{0,1}");
+        lines.add("{ -   }#websites#{0,1}");
         lines.add("Thanks for your reading!");
+        lines.add("uuid: $UUID$");
         lines.add("?[click]");
         lines.add("?[click]Click to see more!");
         lines.add("?[hidden]This entry should be hidden!");
 
         Map<String, List<String>> optional = new HashMap<>();
-        optional.put("guidance", Arrays.asList("To get more information for %(name), see:"));
+        optional.put("guidance", Arrays.asList("To get more information for %(name),", " see:"));
         optional.put("websites", Arrays.asList("https://www.baidu.com", "https://www.google.com"));
 
         TextContents textContents = new TextContents(lines, optional);
@@ -33,13 +35,17 @@ public class ParseTest {
         PreparedText<String, PrintStream> msg = new PreparedText<String, PrintStream>(textContents)
                 .dispatcher((p, s) -> s.forEach(p::println))
                 .parser((p, s) -> s)
-                .compiler((p, s) -> s);
+                .compiler((p, s) -> s)
+                .replace(    // Custom replacer, replace $UUID$ with Random UUID
+                        "$UUID$", () -> UUID.randomUUID().toString()
+                );
 
         msg.placeholder("name", "Carm")
                 .insert("guidance")
                 .insert("click")
                 .insert("websites", "Baidu", "Bilibili", "Google");
 
+
         System.out.println("----------------------------");
         msg.to(System.out);
         System.out.println("----------------------------");

features/text/src/test/java/cc/carm/lib/configuration/value/text/tests/conf/ConfiguredMsg.java

@@ -17,7 +17,8 @@ public class ConfiguredMsg extends ConfiguredText<String, PrintStream> {
         return builder().defaults(text).build();
     }
 
-    public ConfiguredMsg(@NotNull ValueManifest<TextContents> manifest, @NotNull String[] params) {
+    public ConfiguredMsg(@NotNull ValueManifest<TextContents, TextContents> manifest,
+                         @NotNull String[] params) {
         super(
                 manifest,
                 (p, s) -> s,

features/validators/pom.xml

@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>cc.carm.lib</groupId>
+        <artifactId>configured-parent</artifactId>
+        <version>4.1.2</version>
+        <relativePath>../../pom.xml</relativePath>
+    </parent>
+    <properties>
+        <maven.compiler.source>${project.jdk.version}</maven.compiler.source>
+        <maven.compiler.target>${project.jdk.version}</maven.compiler.target>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+        <maven.compiler.encoding>UTF-8</maven.compiler.encoding>
+    </properties>
+
+    <artifactId>configured-feature-validators</artifactId>
+    <packaging>jar</packaging>
+
+    <dependencies>
+        <dependency>
+            <groupId>${project.groupId}</groupId>
+            <artifactId>configured-core</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-source-plugin</artifactId>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

features/validators/src/main/java/cc/carm/lib/configuration/annotation/ValuePattern.java

@@ -0,0 +1,16 @@
+package cc.carm.lib.configuration.annotation;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Target({ElementType.FIELD})
+@Retention(RetentionPolicy.RUNTIME)
+public @interface ValuePattern {
+
+    String value();
+
+    String message() default "Invalid value format!";
+
+}

features/validators/src/main/java/cc/carm/lib/configuration/annotation/ValueRange.java

@@ -0,0 +1,18 @@
+package cc.carm.lib.configuration.annotation;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+@Target({ElementType.FIELD})
+@Retention(RetentionPolicy.RUNTIME)
+public @interface ValueRange {
+
+    long min() default Long.MIN_VALUE;
+
+    long max() default Long.MAX_VALUE;
+
+    String message() default "Value out of range.";
+
+}

features/validators/src/main/java/cc/carm/lib/configuration/validators/Validators.java

@@ -0,0 +1,44 @@
+package cc.carm.lib.configuration.validators;
+
+import cc.carm.lib.configuration.annotation.ValuePattern;
+import cc.carm.lib.configuration.annotation.ValueRange;
+import cc.carm.lib.configuration.function.ValueValidator;
+import cc.carm.lib.configuration.source.ConfigurationHolder;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.regex.Pattern;
+
+public class Validators {
+
+    private Validators() {
+        throw new UnsupportedOperationException("API Register.");
+    }
+
+    public static void activate(ConfigurationHolder<?> holder) {
+        holder.initializer().registerValidAnnotation(ValueRange.class, r -> (ho, value) -> {
+            if (!(value instanceof Number)) {
+                throw new IllegalArgumentException("Value is not a number: " + value);
+            }
+
+            Number number = (Number) value;
+            if (number.doubleValue() < r.min() || number.doubleValue() > r.max()) {
+                throw new IllegalArgumentException(r.message());
+            }
+        });
+
+        holder.initializer().registerValidAnnotation(ValuePattern.class, r -> new ValueValidator<Object>() {
+            private final Pattern pattern = Pattern.compile(r.value());
+
+            @Override
+            public void validate(@NotNull ConfigurationHolder<?> holder, @Nullable Object value) throws Exception {
+                if (value == null) return;
+                if (!pattern.matcher(value.toString()).matches()) {
+                    throw new IllegalArgumentException(r.message());
+                }
+            }
+        });
+
+    }
+
+}

features/versioned/pom.xml

@@ -6,7 +6,7 @@
     <parent>
         <groupId>cc.carm.lib</groupId>
         <artifactId>configured-parent</artifactId>
-        <version>4.1.0</version>
+        <version>4.1.2</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <properties>

pom.xml

@@ -15,13 +15,14 @@
     <groupId>cc.carm.lib</groupId>
     <artifactId>configured-parent</artifactId>
     <packaging>pom</packaging>
-    <version>4.1.0</version>
+    <version>4.1.2</version>
     <modules>
         <module>core</module>
         <module>features/section</module>
         <module>features/file</module>
         <module>features/commentable</module>
         <module>features/versioned</module>
+        <module>features/validators</module>
         <module>features/text</module>
 
         <module>providers/yaml</module>

providers/gson/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>configured-parent</artifactId>
         <groupId>cc.carm.lib</groupId>
-        <version>4.1.0</version>
+        <version>4.1.2</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>

providers/gson/src/test/java/config/JSONConfigTest.java

@@ -1,10 +1,8 @@
 package config;
 
 import cc.carm.lib.configuration.demo.tests.ConfigurationTest;
-import cc.carm.lib.configuration.source.json.JSONConfigFactory;
 import cc.carm.lib.configuration.source.ConfigurationHolder;
-import cc.carm.lib.configuration.value.ConfigValue;
-import cc.carm.lib.configuration.value.standard.ConfiguredValue;
+import cc.carm.lib.configuration.source.json.JSONConfigFactory;
 import org.junit.Test;
 
 import java.io.File;
@@ -18,12 +16,6 @@ public class JSONConfigTest {
 
     @Test
     public void onTest() {
-
-        ConfigValue<Boolean> EXAMPLE = ConfiguredValue.of(false);
-        EXAMPLE.initialize(this.holder, "example");
-
-        System.out.println("Example: " + EXAMPLE.get());
-
         ConfigurationTest.testDemo(this.holder);
         ConfigurationTest.testInner(this.holder);
 

providers/hocon/pom.xml

@@ -6,7 +6,7 @@
     <parent>
         <groupId>cc.carm.lib</groupId>
         <artifactId>configured-parent</artifactId>
-        <version>4.1.0</version>
+        <version>4.1.2</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <properties>

providers/mongodb/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>configured-parent</artifactId>
         <groupId>cc.carm.lib</groupId>
-        <version>4.1.0</version>
+        <version>4.1.2</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>

providers/sql/pom.xml

@@ -6,7 +6,7 @@
     <parent>
         <artifactId>configured-parent</artifactId>
         <groupId>cc.carm.lib</groupId>
-        <version>4.1.0</version>
+        <version>4.1.2</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <properties>

providers/sql/src/main/java/cc/carm/lib/configuration/source/sql/SQLSource.java

@@ -75,10 +75,10 @@ public class SQLSource extends ConfigureSource<SourcedSection, Map<String, Objec
         List<Object[]> dataValues = new ArrayList<>();
 
         SourcedSection section = section();
-        Map<String, ConfigValue<?>> values = holder().registeredValues();
-        for (Map.Entry<String, ConfigValue<?>> entry : values.entrySet()) {
+        Map<String, ConfigValue<?, ?>> values = holder().registeredValues();
+        for (Map.Entry<String, ConfigValue<?, ?>> entry : values.entrySet()) {
             @NotNull String path = entry.getKey();
-            @NotNull ConfigValue<?> config = entry.getValue();
+            @NotNull ConfigValue<?, ?> config = entry.getValue();
             @Nullable Object value = section.get(path);
 
             if (value instanceof SourcedSection) {

providers/yaml/pom.xml

@@ -6,7 +6,7 @@
     <parent>
         <artifactId>configured-parent</artifactId>
         <groupId>cc.carm.lib</groupId>
-        <version>4.1.0</version>
+        <version>4.1.2</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <properties>

providers/yaml/src/test/java/yaml/test/YamlTests.java

@@ -1,11 +1,11 @@
 package yaml.test;
 
-import cc.carm.lib.configuration.commentable.Commentable;
 import cc.carm.lib.configuration.commentable.CommentableMeta;
 import cc.carm.lib.configuration.demo.tests.ConfigurationTest;
 import cc.carm.lib.configuration.source.ConfigurationHolder;
 import cc.carm.lib.configuration.source.yaml.YAMLConfigFactory;
 import cc.carm.lib.configuration.source.yaml.YAMLSource;
+import cc.carm.lib.configuration.validators.Validators;
 import org.junit.Test;
 
 import java.util.List;
@@ -19,6 +19,8 @@ public class YamlTests {
         ConfigurationHolder<YAMLSource> holder = YAMLConfigFactory.from("target/tests.yml")
                 .resourcePath("configs/sample.yml").build();
 
+        Validators.activate(holder);
+
         ConfigurationTest.testDemo(holder);
         ConfigurationTest.testInner(holder);