fix: Fixed the missing implements of #remove

.github/workflows/deploy.yml

@@ -40,7 +40,7 @@ jobs:
         run: |
           rm -rf docs
           mkdir -vp docs
-          cp -vrf core/target/apidocs/* docs/
+          cp -vrf core/target/reports/apidocs/* docs/
           cp -vrf .doc/JAVADOC-README.md docs/README.md
 
       - name: "Generate the Javadoc sitemap"

.gitignore

@@ -1,3 +1,3 @@
-/.idea/
+.idea/
 **/target/
 **.iml

README.md

@@ -49,41 +49,58 @@ Check out all code demonstrations [HERE](demo/src/main/java/cc/carm/lib/configur
 For more examples, see the [Development Guide](.doc/README.md).
 
 ```java
-@HeaderComment("Configurations for sample")
+@ConfigPath(root = true)
-interface SampleConfig extends Configuration {
+@HeaderComments("Configurations for sample")
+public interface SampleConfig extends Configuration {
 
   @InlineComment("Enabled?") // Inline comment
   ConfiguredValue<Boolean> ENABLED = ConfiguredValue.of(true);
 
+  @HeaderComments("Server configurations") // Header comment
+  ConfiguredValue<Integer> PORT = ConfiguredValue.of(Integer.class);
+
+  @HeaderComments({"[ UUID >-----------------------------------", "A lot of UUIDs"})
+  @FooterComments("[ UUID >-----------------------------------")
   ConfiguredList<UUID> UUIDS = ConfiguredList.builderOf(UUID.class).fromString()
-            .parseValue(UUID::fromString).serializeValue(UUID::toString)
+          .parse(UUID::fromString).serialize(UUID::toString)
           .defaults(
                   UUID.fromString("00000000-0000-0000-0000-000000000000"),
                   UUID.fromString("00000000-0000-0000-0000-000000000001")
           ).build();
 
+  @ConfigPath("info") // Custom path
   interface INFO extends Configuration {
 
-        @HeaderComment("Configure your name!") // Header comment
+    @HeaderComments("Configure your name!") // Header comment
     ConfiguredValue<String> NAME = ConfiguredValue.of("Joker");
 
-        @ConfigPath("year") // Custom path
+    @ConfigPath("how-old-are-you") // Custom path
     ConfiguredValue<Integer> AGE = ConfiguredValue.of(24);
 
   }
+
 }
+
 ```
 
 ```java
 public class Sample {
   public static void main(String[] args) {
     // 1. Make a configuration provider from a file.
-    ConfigurationProvider<?> provider = EasyConfiguration.from("config.yml");
+    ConfigurationHolder<?> holder = YAMLConfigFactory.from("target/config.yml")
+            .resourcePath("configs/sample.yml")
+            .indent(4) // Optional: Set the indentation of the configuration file.
+            .build();
+
     // 2. Initialize the configuration classes or instances.
-    provider.initialize(SampleConfig.class);
+    holder.initialize(SampleConfig.class);
     // 3. Enjoy using the configuration!
+    System.out.println("Enabled? -> " + SampleConfig.ENABLED.resolve());
     SampleConfig.ENABLED.set(false);
-    System.out.println("Your name is " + SampleConfig.INFO.NAME.getNotNull() + " !");
+    System.out.println("And now? -> " + SampleConfig.ENABLED.resolve());
+    // p.s. Changes not save so enable value will still be true in the next run.
+
+    System.out.println("Your name is " + SampleConfig.INFO.NAME.resolve() + " (age=" + SampleConfig.INFO.AGE.resolve() + ")!");
   }
 }
 
@@ -92,16 +109,22 @@ public class Sample {
 ```yaml
 # Configurations for sample
 
-enabled: true # Enabled?
+enabled: true #Enabled?
 
+# Server configurations
+port:
+
+# [ UUID >-----------------------------------
+# A lot of UUIDs
 uuids:
   - 00000000-0000-0000-0000-000000000000
   - 00000000-0000-0000-0000-000000000001
+# [ UUID >-----------------------------------
 
 info:
   # Configure your name!
   name: Joker
-  year: 24
+  how-old-are-you: 24
 ```
 
 ### Dependencies
@@ -159,10 +182,10 @@ info:
             <scope>compile</scope>
         </dependency>
 
-        <!-- JSON file-based implementation, compatible with all Java environments. Note: JSON does not support file comments. -->
+        <!-- JSON file-based implementation, compatible with all Java environments. -->
         <dependency>
             <groupId>cc.carm.lib</groupId>
-            <artifactId>easyconfiguration-json</artifactId>
+            <artifactId>easyconfiguration-gson</artifactId>
             <version>[LATEST RELEASE]</version>
             <scope>compile</scope>
         </dependency>
@@ -205,8 +228,8 @@ dependencies {
     // YAML file-based implementation, compatible with all Java environments.
     api "cc.carm.lib:easyconfiguration-yaml:[LATEST RELEASE]"
 
-    // JSON file-based implementation, compatible with all Java environments. Note: JSON does not support file comments.
+    // JSON file-based implementation, compatible with all Java environments.
-    api "cc.carm.lib:easyconfiguration-json:[LATEST RELEASE]"
+    api "cc.carm.lib:easyconfiguration-gson:[LATEST RELEASE]"
 
 }
 ```
@@ -220,7 +243,8 @@ dependencies {
 EasyConfiguration for MineCraft!
 Easily manage configurations on MineCraft-related server platforms.
 
-Currently supports BungeeCord, Bukkit (Spigot) servers, with more platforms to be supported soon.
+Currently, it supports BungeeCord, Velocity, Bukkit (Spigot) servers, 
+with more platforms to be supported soon.
 
 ## Support and Donation
 

README_CN.md

@@ -43,15 +43,22 @@ README LANGUAGES [ [English](README.md) | [**中文**](README_CN.md)  ]
 您可以 [点击这里](demo/src/main/java/cc/carm/lib/configuration/demo) 直接查看现有的代码演示，更多复杂情况演示详见 [开发介绍](.doc/README.md) 。
 
 
-```java
-@HeaderComment("Configurations for sample")
-interface SampleConfig extends Configuration {
 
-    @InlineComment("Enabled?") // 行内注释
+```java
+@ConfigPath(root = true)
+@HeaderComments("Configurations for sample")
+public interface SampleConfig extends Configuration {
+
+  @InlineComment("Enabled?") // 行后注释
   ConfiguredValue<Boolean> ENABLED = ConfiguredValue.of(true);
 
+  @HeaderComments("Server configurations") // 头部注释
+  ConfiguredValue<Integer> PORT = ConfiguredValue.of(Integer.class);
+
+  @HeaderComments({"[ UUID >-----------------------------------", "A lot of UUIDs"})
+  @FooterComments("[ UUID >-----------------------------------")
   ConfiguredList<UUID> UUIDS = ConfiguredList.builderOf(UUID.class).fromString()
-            .parseValue(UUID::fromString).serializeValue(UUID::toString)
+          .parse(UUID::fromString).serialize(UUID::toString)
           .defaults(
                   UUID.fromString("00000000-0000-0000-0000-000000000000"),
                   UUID.fromString("00000000-0000-0000-0000-000000000001")
@@ -59,26 +66,34 @@ interface SampleConfig extends Configuration {
   
   interface INFO extends Configuration {
 
-        @HeaderComment("Configure your name!") // 头部注释
+    @HeaderComments("Configure your name!") // Header comment
     ConfiguredValue<String> NAME = ConfiguredValue.of("Joker");
 
-        @ConfigPath("year") // 自定义配置路径，若不定义，则按照默认规则生成
+    @ConfigPath("how-old-are-you") // 自定义路径
     ConfiguredValue<Integer> AGE = ConfiguredValue.of(24);
 
   }
+
 }
+
 ```
 
 ```java
 public class Sample {
     public static void main(String[] args) {
-        // 1. 生成一个 “Provider” 用于给配置类提供源配置的文件。
+        // 1. 生成一个 “holder” 用于给配置类提供源配置的文件。
-        ConfigurationProvider<?> provider = EasyConfiguration.from("config.yml");
+        ConfigurationHolder<?> holder = YAMLConfigFactory.from("target/config.yml")
-        // 2. 通过 “Provider” 初始化配置类或配置实例。
+                .resourcePath("configs/sample.yml")
-        provider.initialize(SampleConfig.class);
+                .indent(4) // Optional: Set the indentation of the configuration file.
+                .build();
+
+        // 2. 通过 “holder” 初始化配置类或配置实例。
+        holder.initialize(SampleConfig.class);
         // 3. 现在可以享受快捷方便的配置文件使用方式了~
+        System.out.println("Enabled? -> " + SampleConfig.ENABLED.resolve());
         SampleConfig.ENABLED.set(false);
-        System.out.println("Your name is " + SampleConfig.INFO.NAME.getNotNull() + " !");
+        System.out.println("And now? -> " + SampleConfig.ENABLED.resolve());
+        // p.s. 在本示例里的更改未保存，因此启用值在下次运行中仍将为 true。
     }
 }
 ```
@@ -86,16 +101,22 @@ public class Sample {
 ```yaml
 # Configurations for sample
 
-enabled: true # Enabled?
+enabled: true #Enabled?
 
+# Server configurations
+port:
+
+# [ UUID >-----------------------------------
+# A lot of UUIDs
 uuids:
   - 00000000-0000-0000-0000-000000000000
   - 00000000-0000-0000-0000-000000000001
+# [ UUID >-----------------------------------
 
 info:
   # Configure your name!
   name: Joker
-  year: 24
+  how-old-are-you: 24
 ```
 
 ### 依赖方式
@@ -164,7 +185,7 @@ info:
         <!--需要注意的是，JSON不支持文件注释。-->
         <dependency>
             <groupId>cc.carm.lib</groupId>
-            <artifactId>easyconfiguration-json</artifactId>
+            <artifactId>easyconfiguration-gson</artifactId>
             <version>[LATEST RELEASE]</version>
             <scope>compile</scope>
         </dependency>
@@ -225,7 +246,7 @@ dependencies {
 
      //基于JSON文件的实现版本，可用于全部Java环境。
     //需要注意的是，JSON不支持文件注释。
-    api "cc.carm.lib:easyconfiguration-json:[LATEST RELEASE]"
+    api "cc.carm.lib:easyconfiguration-gson:[LATEST RELEASE]"
     
     api "cc.carm.lib:easyconfiguration-hocon:[LATEST RELEASE]"
     

core/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>easyconfiguration-parent</artifactId>
         <groupId>cc.carm.lib</groupId>
-        <version>4.0.0</version>
+        <version>4.0.2</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <properties>

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

@@ -3,8 +3,8 @@ package cc.carm.lib.configuration.builder.impl;
 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.DataConsumer;
 import cc.carm.lib.configuration.function.DataFunction;
+import cc.carm.lib.configuration.function.ValueConsumer;
 import cc.carm.lib.configuration.function.ValueHandler;
 import cc.carm.lib.configuration.source.section.ConfigureSection;
 import cc.carm.lib.configuration.value.ConfigValue;
@@ -34,28 +34,30 @@ public abstract class AbstractSectionBuilder<
         this.serializer = serializer;
     }
 
-    public @NotNull SELF parse(DataFunction<ConfigureSection, PARAM> valueParser) {
+    public @NotNull SELF parse(@NotNull DataFunction<ConfigureSection, PARAM> valueParser) {
         return parse((p, section) -> valueParser.handle(section));
     }
 
-    public @NotNull SELF parse(ValueHandler<ConfigureSection, PARAM> valueParser) {
+    public @NotNull SELF parse(@NotNull ValueHandler<ConfigureSection, PARAM> valueParser) {
         this.parser = valueParser;
         return self();
     }
 
-    public @NotNull SELF serialize(DataFunction<PARAM, ? extends Map<String, Object>> serializer) {
+    public @NotNull SELF serialize(@NotNull ValueHandler<PARAM, ? extends Map<String, Object>> serializer) {
-        return serialize((p, value) -> serializer.handle(value));
-    }
-
-    public @NotNull SELF serialize(ValueHandler<PARAM, ? extends Map<String, Object>> serializer) {
         this.serializer = serializer;
         return self();
     }
 
-    public @NotNull SELF serialize(DataConsumer<Map<String, Object>> serializer) {
+    public @NotNull SELF serialize(@NotNull DataFunction<PARAM, ? extends Map<String, Object>> serializer) {
         return serialize((p, value) -> {
+            return serializer.handle(value);
+        });
+    }
+
+    public @NotNull SELF serialize(@NotNull ValueConsumer<Map<String, Object>, PARAM> serializer) {
+        return serialize((h, value) -> {
             Map<String, Object> map = new LinkedHashMap<>();
-            serializer.accept(map);
+            serializer.accept(h, map, value);
             return map;
         });
     }

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

@@ -29,7 +29,7 @@ public abstract class AbstractSourceBuilder<
         this.valueSerializer = serializer;
     }
 
-    public @NotNull SELF parse(DataFunction<SOURCE, PARAM> parser) {
+    public @NotNull SELF parse(@NotNull DataFunction<SOURCE, PARAM> parser) {
         return parse((p, source) -> parser.handle(source));
     }
 

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

@@ -0,0 +1,21 @@
+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/source/ConfigurationFactory.java

@@ -20,6 +20,13 @@ import java.util.function.Consumer;
 import java.util.function.Function;
 import java.util.function.Supplier;
 
+/**
+ * ConfigurationFactory, used to create configuration holder.
+ *
+ * @param <SOURCE> The {@link ConfigureSource} type
+ * @param <HOLDER> The {@link ConfigurationHolder} type.
+ * @param <SELF>   Self builder, for further implement support.
+ */
 public abstract class ConfigurationFactory<
         SOURCE extends ConfigureSource<?, ?, SOURCE>,
         HOLDER extends ConfigurationHolder<SOURCE>,
@@ -139,18 +146,39 @@ public abstract class ConfigurationFactory<
         return self();
     }
 
+    /**
+     * Supply the base path generator for this configuration holder
+     *
+     * @param generator {@link  PathGenerator}
+     * @return this
+     */
     public SELF pathGenerator(PathGenerator generator) {
         return initializer(loader -> {
             loader.pathGenerator(generator);
         });
     }
 
+    /**
+     * Register a new annotation for metadata to the configuration loader
+     *
+     * @param annotation The {@link Annotation}
+     * @param metadata   The {@link ConfigurationMetadata} type
+     * @param extractor  The {@link Function} to extract the metadata from the annotation
+     * @param <M>        The metadata type
+     * @param <A>        The annotation type
+     * @return this
+     */
     public <M, A extends Annotation> SELF metaAnnotation(@NotNull Class<A> annotation,
                                                          @NotNull ConfigurationMetadata<M> metadata,
                                                          @NotNull Function<A, M> extractor) {
         return initializer(loader -> loader.registerAnnotation(annotation, metadata, extractor));
     }
 
+    /**
+     * Build the configuration holder.
+     *
+     * @return The configuration holder
+     */
     public abstract @NotNull HOLDER build();
 
 }

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

@@ -6,6 +6,7 @@ import cc.carm.lib.configuration.adapter.ValueType;
 import cc.carm.lib.configuration.source.loader.ConfigurationInitializer;
 import cc.carm.lib.configuration.source.meta.ConfigurationMetaHolder;
 import cc.carm.lib.configuration.source.meta.ConfigurationMetadata;
+import cc.carm.lib.configuration.source.option.ConfigurationOption;
 import cc.carm.lib.configuration.source.option.ConfigurationOptionHolder;
 import cc.carm.lib.configuration.source.section.ConfigureSource;
 import cc.carm.lib.configuration.value.ValueManifest;
@@ -50,6 +51,10 @@ public abstract class ConfigurationHolder<SOURCE extends ConfigureSource<?, ?, S
         return options;
     }
 
+    public <O> O option(@NotNull ConfigurationOption<O> option) {
+        return options().get(option);
+    }
+
     public @NotNull Map<String, ConfigurationMetaHolder> metadata() {
         return this.metadata;
     }

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

@@ -3,6 +3,7 @@ package cc.carm.lib.configuration.source.loader;
 import cc.carm.lib.configuration.Configuration;
 import cc.carm.lib.configuration.source.ConfigurationHolder;
 import cc.carm.lib.configuration.source.meta.ConfigurationMetadata;
+import cc.carm.lib.configuration.source.meta.StandardMeta;
 import cc.carm.lib.configuration.source.option.StandardOptions;
 import cc.carm.lib.configuration.value.ConfigValue;
 import org.jetbrains.annotations.NotNull;
@@ -107,13 +108,13 @@ public class ConfigurationInitializer {
     public void initialize(@NotNull ConfigurationHolder<?> holder,
                            @NotNull Configuration config) throws Exception {
         initializeInstance(holder, config, null, null);
-        if (holder.options().get(StandardOptions.SET_DEFAULTS)) holder.save();
+        if (holder.option(StandardOptions.SET_DEFAULTS)) holder.save();
     }
 
     public void initialize(@NotNull ConfigurationHolder<?> holder,
                            @NotNull Class<? extends Configuration> clazz) throws Exception {
         initializeStaticClass(holder, clazz, null, null);
-        if (holder.options().get(StandardOptions.SET_DEFAULTS)) holder.save();
+        if (holder.option(StandardOptions.SET_DEFAULTS)) holder.save();
     }
 
 
@@ -148,7 +149,7 @@ public class ConfigurationInitializer {
             initializeField(holder, clazz, field, path);
         }
 
-        if (holder.options().get(StandardOptions.LOAD_SUB_CLASSES)) {
+        if (holder.option(StandardOptions.LOAD_SUB_CLASSES)) {
             Class<?>[] classes = clazz.getDeclaredClasses();
             for (int i = classes.length - 1; i >= 0; i--) {   // 逆向加载，保持顺序。
                 initializeStaticClass(holder, classes[i], path, null);
@@ -168,13 +169,17 @@ public class ConfigurationInitializer {
                 String path = getFieldPath(holder, parent, field);
                 if (path == null) return;
                 value.initialize(holder, path);
+                holder.metadata(path).set(StandardMeta.UNIT, true); // Mark the minimal config value unit.
                 try {
                     this.fieldInitializer.whenInitialize(holder, path, field);
                 } catch (Exception e) {
                     e.printStackTrace();
                 }
-                if (holder.options().get(StandardOptions.SET_DEFAULTS)) {
+                if (holder.option(StandardOptions.SET_DEFAULTS)) {
-                    value.setDefault();
+                    value.setDefault(); // Set default value.
+                }
+                if (holder.option(StandardOptions.PRELOAD)) {
+                    value.get(); // Preload the value by calling #get method.
                 }
             } else if (source instanceof Configuration && object instanceof Configuration) {
                 // 当且仅当 源字段与字段 均为Configuration实例时，才对目标字段进行下一步初始化加载。

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

@@ -9,6 +9,12 @@ import org.jetbrains.annotations.Nullable;
 import java.lang.reflect.Field;
 import java.util.function.UnaryOperator;
 
+/**
+ * Path generator for configuration.
+ * <p>
+ * Path generator is a utility class that helps to generate the path of the configuration.
+ * It can be used to generate the path of the field or class.
+ */
 public class PathGenerator {
 
     public static PathGenerator of() {
@@ -80,7 +86,7 @@ public class PathGenerator {
     }
 
     public static char pathSeparator(ConfigurationHolder<?> holder) {
-        return holder.options().get(StandardOptions.PATH_SEPARATOR);
+        return holder.option(StandardOptions.PATH_SEPARATOR);
     }
 
     /**

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

@@ -0,0 +1,10 @@
+package cc.carm.lib.configuration.source.meta;
+
+public interface StandardMeta {
+
+    /**
+     * To mark the {@link cc.carm.lib.configuration.value.ConfigValue} as a minimal unit path.
+     */
+    ConfigurationMetadata<Boolean> UNIT = ConfigurationMetadata.of(false);
+
+}

core/src/main/java/cc/carm/lib/configuration/source/option/ConfigurationOption.java

@@ -6,32 +6,20 @@ import java.util.function.Supplier;
 
 public class ConfigurationOption<V> {
 
-    @SuppressWarnings("unchecked")
     public static <T> ConfigurationOption<T> of(@NotNull T defaultValue) {
-        return of((Class<T>) defaultValue.getClass(), defaultValue);
+        return new ConfigurationOption<>(defaultValue);
-    }
-
-    public static <T> ConfigurationOption<T> of(@NotNull Class<T> valueClazz, @NotNull T defaultValue) {
-        return new ConfigurationOption<>(valueClazz, defaultValue);
     }
 
     public static <T> ConfigurationOption<T> of(@NotNull Supplier<T> defaultValue) {
         return of(defaultValue.get());
     }
 
-    private final @NotNull Class<V> valueClazz;
     private @NotNull V defaultValue;
 
-    public ConfigurationOption(@NotNull Class<V> valueClazz, @NotNull V defaultValue) {
+    public ConfigurationOption(@NotNull V defaultValue) {
-        this.valueClazz = valueClazz;
         this.defaultValue = defaultValue;
     }
 
-    @NotNull
-    public Class<V> valueClass() {
-        return this.valueClazz;
-    }
-
     public @NotNull V defaults() {
         return defaultValue;
     }

core/src/main/java/cc/carm/lib/configuration/source/section/ConfigureSection.java

@@ -1,7 +1,6 @@
 package cc.carm.lib.configuration.source.section;
 
 import cc.carm.lib.configuration.function.DataFunction;
-import cc.carm.lib.configuration.source.option.StandardOptions;
 import org.jetbrains.annotations.Contract;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -12,62 +11,199 @@ import java.util.function.Function;
 import java.util.function.Supplier;
 import java.util.stream.Stream;
 
+/**
+ * Represents a section of a configuration.
+ *
+ * @author Carm
+ * @since 4.0.0
+ */
 public interface ConfigureSection {
 
-    @NotNull ConfigureSource<?, ?, ?> source();
+    /**
-
+     * Gets the parent section of this section.
+     * <p>
+     * For root sections, this will return null.
+     *
+     * @return Parent section, or null if this is a root section.
+     */
+    @Contract(pure = true)
     @Nullable ConfigureSection parent();
 
-    default char separator() {
+    /**
-        return source().holder().options().get(StandardOptions.PATH_SEPARATOR);
+     * Gets a set containing all keys in this section.
-    }
+     * <p>
-
+     * If deep is set to true, then this will contain all the keys within any
+     * child {@link ConfigureSection}s (and their children paths).
+     * <p>
+     * If deep is set to false, then this will contain only the keys of any
+     * direct children, and not their own children.
+     *
+     * @param deep Whether to get a deep list.
+     * @return Set of keys contained within this Section.
+     */
     @NotNull
     @UnmodifiableView
     default Set<String> getKeys(boolean deep) {
         return getValues(deep).keySet();
     }
 
+    /**
+     * Gets a set containing all values in this section.
+     * <p>
+     * If deep is set to true, then this will contain all the keys within any
+     * child {@link ConfigureSection}s (and their children paths).
+     * <p>
+     * If deep is set to false, then this will contain only the keys of any
+     * direct children, and not their own children.
+     *
+     * @param deep Whether to get a deep list.
+     * @return Map of data values contained within this Section.
+     */
     @NotNull
     @UnmodifiableView
     Map<String, Object> getValues(boolean deep);
 
+    /**
+     * Sets the value at the given path.
+     * <p>
+     * Null values will be kept, if you want to remove a value use {@link #remove(String)}
+     * Path separator depends on holder's
+     * {@link cc.carm.lib.configuration.source.option.StandardOptions#PATH_SEPARATOR}
+     *
+     * @param path  The path to set the value at.
+     * @param value The value to set.
+     */
     void set(@NotNull String path, @Nullable Object value);
 
+    /**
+     * Removes the value at the given path.
+     * <p>
+     * Path separator depends on holder's
+     * {@link cc.carm.lib.configuration.source.option.StandardOptions#PATH_SEPARATOR}
+     *
+     * @param path The path to remove the value at.
+     */
+    void remove(@NotNull String path);
+
+    /**
+     * Check if the value of given path is present.
+     * <p>
+     * Path separator depends on holder's
+     * {@link cc.carm.lib.configuration.source.option.StandardOptions#PATH_SEPARATOR}
+     *
+     * @param path The path to check.
+     * @return True if the value is present, false otherwise.
+     */
     boolean contains(@NotNull String path);
 
+    /**
+     * Predicate the value of given path is specific type.
+     *
+     * @param path      The path to check.
+     * @param typeClass The type's class
+     * @param <T>       The type to check.
+     * @return True if the value is present and is the correct type, false otherwise.
+     */
     default <T> boolean isType(@NotNull String path, @NotNull Class<T> typeClass) {
         return typeClass.isInstance(get(path));
     }
 
+    /**
+     * Predicate the value of given path is a  {@link List}.
+     *
+     * @param path The path to check.
+     * @return True if the value is present and is a list, false otherwise.
+     */
     default boolean isList(@NotNull String path) {
         return isType(path, List.class);
     }
 
+    /**
+     * Get the value as a {@link List} from the specified path.
+     *
+     * @param path The path to get the  {@link List}.
+     * @return The list if the path exists and is a list, otherwise null.
+     */
     @Nullable List<?> getList(@NotNull String path);
 
+    /**
+     * Predicate the value of given path is a {@link ConfigureSection}.
+     *
+     * @param path The path to check.
+     * @return True if the value is present and is a section, false otherwise.
+     */
     default boolean isSection(@NotNull String path) {
         return isType(path, ConfigureSection.class);
     }
 
+    /**
+     * Get the value as a {@link ConfigureSection} from the specified path.
+     *
+     * @param path The path to get the section.
+     * @return The section if the path exists and is a section, otherwise null.
+     */
     @Nullable
     ConfigureSection getSection(@NotNull String path);
 
+    /**
+     * Get the origin value of the path.
+     *
+     * @param path The path to get the value from.
+     * @return The value at the path, or null if not found.
+     */
     @Nullable Object get(@NotNull String path);
 
-    default @Nullable <T> T get(@NotNull String path, @NotNull Class<T> clazz) {
+    /**
-        return get(path, null, clazz);
+     * Get the value of the path for specific type,
+     * if the path does not exist, return null.
+     *
+     * @param path The path to get the value from.
+     * @param type The type class of the value
+     * @param <T>  The type of the value
+     * @return The value at the path, or the default value if not found.
+     */
+    default @Nullable <T> T get(@NotNull String path, @NotNull Class<T> type) {
+        return get(path, null, type);
     }
 
-    default @Nullable <T> T get(@NotNull String path, @NotNull DataFunction<Object, T> parser) {
+    /**
+     * Get the value of the path using a parser function,
+     * if the path does not exist, return NULL.
+     *
+     * @param path   The path to get the value from.
+     * @param parser The function to parse the value
+     * @param <T>    The type of the value
+     * @return The value at the path, or null if not found.
+     */
+    default @Nullable <T> T get(@NotNull String path, @NotNull DataFunction<@Nullable Object, T> parser) {
         return get(path, null, parser);
     }
 
+    /**
+     * Get the value of the path for specific type,
+     * if the path does not exist, return the default value.
+     *
+     * @param path     The path to get the value from.
+     * @param defaults The default value to return if the path does not exist.
+     * @param clazz    The type class of the value
+     * @param <T>      The type of the value
+     * @return The value at the path, or the default value if not found.
+     */
     @Contract("_,!null,_->!null")
-    default @Nullable <T> T get(@NotNull String path, @Nullable T defaultValue, @NotNull Class<T> clazz) {
+    default @Nullable <T> T get(@NotNull String path, @Nullable T defaults, @NotNull Class<T> clazz) {
-        return get(path, defaultValue, DataFunction.castObject(clazz));
+        return get(path, defaults, DataFunction.castObject(clazz));
     }
 
+    /**
+     * Get the value of the path using a parser function,
+     * if the path does not exist, return the default value.
+     *
+     * @param path         The path to get the value from.
+     * @param defaultValue The default value to return if the path does not exist.
+     * @param parser       The function to parse the value
+     * @param <T>          The type of the value
+     * @return The value at the path, or the default value if not found.
+     */
     @Contract("_,!null,_->!null")
     default @Nullable <T> T get(@NotNull String path, @Nullable T defaultValue,
                                 @NotNull DataFunction<Object, T> parser) {
@@ -82,125 +218,290 @@ public interface ConfigureSection {
         return defaultValue;
     }
 
-
+    /**
+     * Predicate the value of given path is a {@link Boolean}.
+     *
+     * @param path The path to check.
+     * @return True if the value is present and is a boolean, false otherwise.
+     */
     default boolean isBoolean(@NotNull String path) {
         return isType(path, Boolean.class);
     }
 
+    /**
+     * Get the value as a {@link Boolean} from the specified path.
+     *
+     * @param path The path to get the boolean.
+     * @return The boolean if the path exists and is a boolean, otherwise false.
+     */
     default boolean getBoolean(@NotNull String path) {
         return getBoolean(path, false);
     }
 
+    /**
+     * Get the value as a {@link Boolean} from the specified path.
+     *
+     * @param path The path to get the boolean.
+     * @param def  The default value to return if the path does not exist.
+     * @return The boolean if the path exists and is a boolean, otherwise the default value.
+     */
     @Contract("_, !null -> !null")
     default @Nullable Boolean getBoolean(@NotNull String path, @Nullable Boolean def) {
         return get(path, def, DataFunction.booleanValue());
     }
 
+    /**
+     * Predicate the value of given path is a {@link Byte}.
+     *
+     * @param path The path to check.
+     * @return True if the value is present and is a byte, false otherwise.
+     */
     default @Nullable Boolean isByte(@NotNull String path) {
         return isType(path, Byte.class);
     }
 
+    /**
+     * Get the value as a {@link Byte} from the specified path.
+     *
+     * @param path The path to get the byte.
+     * @return The byte if the path exists and is a byte, otherwise 0.
+     */
     default @Nullable Byte getByte(@NotNull String path) {
         return getByte(path, (byte) 0);
     }
 
+    /**
+     * Get the value as a {@link Byte} from the specified path.
+     *
+     * @param path The path to get the byte.
+     * @param def  The default value to return if the path does not exist.
+     * @return The byte if the path exists and is a byte, otherwise the default value.
+     */
     @Contract("_, !null -> !null")
     default @Nullable Byte getByte(@NotNull String path, @Nullable Byte def) {
         return get(path, def, DataFunction.byteValue());
     }
 
+    /**
+     * Predicate the value of given path is a {@link Short}.
+     *
+     * @param path The path to check.
+     * @return True if the value is present and is a short, false otherwise.
+     */
     default boolean isShort(@NotNull String path) {
         return isType(path, Short.class);
     }
 
+    /**
+     * Get the value as a {@link Short} from the specified path.
+     *
+     * @param path The path to get the short.
+     * @return The short if the path exists and is a short, otherwise 0.
+     */
     default @Nullable Short getShort(@NotNull String path) {
         return getShort(path, (short) 0);
     }
 
+    /**
+     * Get the value as a {@link Short} from the specified path.
+     *
+     * @param path The path to get the short.
+     * @param def  The default value to return if the path does not exist.
+     * @return The short if the path exists and is a short, otherwise the default value.
+     */
     @Contract("_, !null -> !null")
     default @Nullable Short getShort(@NotNull String path, @Nullable Short def) {
         return get(path, def, DataFunction.shortValue());
     }
 
-
+    /**
+     * Predicate the value of given path is a {@link Integer}.
+     *
+     * @param path The path to check.
+     * @return True if the value is present and is a int, false otherwise.
+     */
     default boolean isInt(@NotNull String path) {
         return isType(path, Integer.class);
     }
 
+    /**
+     * Get the value as a {@link Integer} from the specified path.
+     *
+     * @param path The path to get the int.
+     * @return The int if the path exists and is a int, otherwise 0.
+     */
     default @Nullable Integer getInt(@NotNull String path) {
         return getInt(path, 0);
     }
 
+    /**
+     * Get the value as a {@link Integer} from the specified path.
+     *
+     * @param path The path to get the int.
+     * @param def  The default value to return if the path does not exist.
+     * @return The int if the path exists and is a int, otherwise the default value.
+     */
     @Contract("_, !null -> !null")
     default @Nullable Integer getInt(@NotNull String path, @Nullable Integer def) {
         return get(path, def, DataFunction.intValue());
     }
 
 
+    /**
+     * Predicate the value of given path is a {@link Long}.F
+     *
+     * @param path The path to check.
+     * @return True if the value is present and is a long, false otherwise.
+     */
     default boolean isLong(@NotNull String path) {
         return isType(path, Long.class);
     }
 
+    /**
+     * Get the value as a {@link Long} from the specified path.
+     *
+     * @param path The path to get the long.
+     * @return The long if the path exists and is a long, otherwise 0.
+     */
     default @Nullable Long getLong(@NotNull String path) {
         return getLong(path, 0L);
     }
 
+    /**
+     * Get the value as a {@link Long} from the specified path.
+     *
+     * @param path The path to get the long.
+     * @param def  The default value to return if the path does not exist.
+     * @return The long if the path exists and is a long, otherwise the default value.
+     */
     @Contract("_, !null -> !null")
     default @Nullable Long getLong(@NotNull String path, @Nullable Long def) {
         return get(path, def, DataFunction.longValue());
     }
 
-
+    /**
+     * Predicate the value of given path is a {@link Float}.
+     *
+     * @param path The path to check.
+     * @return True if the value is present and is a float, false otherwise.
+     */
     default boolean isFloat(@NotNull String path) {
         return isType(path, Float.class);
     }
 
+    /**
+     * Get the value as a {@link Float} from the specified path.
+     *
+     * @param path The path to get the float.
+     * @return The float if the path exists and is a float, otherwise 0.
+     */
     default @Nullable Float getFloat(@NotNull String path) {
         return getFloat(path, 0.0F);
     }
 
+    /**
+     * Get the value as a {@link Float} from the specified path.
+     *
+     * @param path The path to get the float.
+     * @param def  The default value to return if the path does not exist.
+     * @return The float if the path exists and is a float, otherwise the default value.
+     */
     @Contract("_, !null -> !null")
     default @Nullable Float getFloat(@NotNull String path, @Nullable Float def) {
         return get(path, def, DataFunction.floatValue());
     }
 
-
+    /**
+     * Predicate the value of given path is a {@link Double}.
+     *
+     * @param path The path to check.
+     * @return True if the value is present and is a double, false otherwise.
+     */
     default boolean isDouble(@NotNull String path) {
         return isType(path, Double.class);
     }
 
+    /**
+     * Get the value as a {@link Double} from the specified path.
+     *
+     * @param path The path to get the double.
+     * @return The double if the path exists and is a double, otherwise 0.
+     */
     default @Nullable Double getDouble(@NotNull String path) {
         return getDouble(path, 0.0D);
     }
 
+    /**
+     * Get the value as a {@link Double} from the specified path.
+     *
+     * @param path The path to get the double.
+     * @param def  The default value to return if the path does not exist.
+     * @return The double if the path exists and is a double, otherwise the default value.
+     */
     @Contract("_, !null -> !null")
     default @Nullable Double getDouble(@NotNull String path, @Nullable Double def) {
         return get(path, def, DataFunction.doubleValue());
     }
 
-
+    /**
+     * Predicate the value of given path is a {@link Character}.
+     *
+     * @param path The path to check.
+     * @return True if the value is present and is a char, false otherwise.
+     */
     default boolean isChar(@NotNull String path) {
         return isType(path, Boolean.class);
     }
 
+    /**
+     * Get the value as a {@link Character} from the specified path.
+     *
+     * @param path The path to get the char.
+     * @return The char if the path exists and is a char, otherwise null.
+     */
     default @Nullable Character getChar(@NotNull String path) {
         return getChar(path, null);
     }
 
+    /**
+     * Get the value as a {@link Character} from the specified path.
+     *
+     * @param path The path to get the char.
+     * @param def  The default value to return if the path does not exist.
+     * @return The char if the path exists and is a char, otherwise the default value.
+     */
     @Contract("_, !null -> !null")
     default @Nullable Character getChar(@NotNull String path, @Nullable Character def) {
         return get(path, def, Character.class);
     }
 
-
+    /**
+     * Predicate the value of given path is a {@link String}.
+     *
+     * @param path The path to check.
+     * @return True if the value is present and is a string, false otherwise.
+     */
     default boolean isString(@NotNull String path) {
         return isType(path, String.class);
     }
 
+    /**
+     * Get the value as a {@link String} from the specified path.
+     *
+     * @param path The path to get the string.
+     * @return The string if the path exists and is a string, otherwise null.
+     */
     default @Nullable String getString(@NotNull String path) {
         return getString(path, null);
     }
 
+    /**
+     * Get the value as a {@link String} from the specified path.
+     *
+     * @param path The path to get the string.
+     * @param def  The default value to return if the path does not exist.
+     * @return The string if the path exists and is a string, otherwise the default value.
+     */
     @Contract("_, !null -> !null")
     default @Nullable String getString(@NotNull String path, @Nullable String def) {
         return get(path, def, String.class);
@@ -298,17 +599,41 @@ public interface ConfigureSection {
         return getList(path, DataFunction.castObject(Character.class));
     }
 
+    /**
+     * Get the specific type of collection from the section.
+     *
+     * @param path        The path to get the collection from
+     * @param constructor The constructor of the collection
+     * @param parser      The function to parse the values
+     * @param <T>         The type of the values
+     * @param <C>         The type of the collection
+     * @return The collection of values
+     */
     default <T, C extends Collection<T>> @NotNull C getCollection(@NotNull String path,
                                                                   @NotNull Supplier<C> constructor,
                                                                   @NotNull DataFunction<Object, T> parser) {
         return parseCollection(getList(path), constructor, parser);
     }
 
+    /**
+     * Get the specific type of steam from the section.
+     *
+     * @param path The path to get the stream from
+     * @return The stream of values
+     */
     default @NotNull Stream<?> stream(@NotNull String path) {
         List<?> values = getList(path);
         return values == null ? Stream.empty() : values.stream();
     }
 
+    /**
+     * Get the specific type of steam from the section.
+     *
+     * @param path   The path to get the stream from
+     * @param parser The function to parse the values
+     * @param <T>    The type of the values
+     * @return The stream of values
+     */
     default <T> @NotNull Stream<T> stream(@NotNull String path, @NotNull Function<Object, T> parser) {
         return stream(path).map(parser);
     }

core/src/main/java/cc/carm/lib/configuration/source/section/ConfigureSource.java

@@ -1,12 +1,23 @@
 package cc.carm.lib.configuration.source.section;
 
 import cc.carm.lib.configuration.source.ConfigurationHolder;
+import cc.carm.lib.configuration.source.option.StandardOptions;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.Contract;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import java.util.List;
 import java.util.Map;
 
+/**
+ * ConfigureSource represents the source of configuration,
+ * which can be a file, a database, or any other source.
+ *
+ * @param <SECTION>  The type of the root section.
+ * @param <ORIGINAL> The original configuration object.
+ * @param <SELF>     The type of the source itself, for further implement support.
+ */
 public abstract class ConfigureSource<
         SECTION extends ConfigureSection, ORIGINAL,
         SELF extends ConfigureSource<SECTION, ORIGINAL, SELF>>
@@ -24,28 +35,46 @@ public abstract class ConfigureSource<
         return holder;
     }
 
-
     public void reload() throws Exception {
         onReload(); // 调用重写的Reload方法
         this.lastUpdateMillis = System.currentTimeMillis();
     }
 
-    protected abstract SELF self();
+    @Contract(pure = true)
+    @ApiStatus.Internal
+    protected abstract @NotNull SELF self();
 
     /**
-     * @return Original configuration object
+     * @return The original configuration object.
      */
+    @Contract(pure = true)
     public abstract @NotNull ORIGINAL original();
 
     /**
-     * @return The root {@link ConfigureSection}
+     * @return The root {@link ConfigureSection}, which represents the entire configuration.
      */
     public abstract @NotNull SECTION section();
 
+    /**
+     * Save the whole configuration.
+     *
+     * @throws Exception If any error occurs while saving.
+     */
     public abstract void save() throws Exception;
 
+    /**
+     * Reload the configuration.
+     * <br>This used for implementation, for external usage, use {@link #reload()}
+     *
+     * @throws Exception If any error occurs while reloading.
+     */
+    @ApiStatus.OverrideOnly
     protected abstract void onReload() throws Exception;
 
+    public char pathSeparator() {
+        return holder().options().get(StandardOptions.PATH_SEPARATOR);
+    }
+
     public long getLastUpdateMillis() {
         return this.lastUpdateMillis;
     }
@@ -54,14 +83,15 @@ public abstract class ConfigureSource<
         return getLastUpdateMillis() > parsedTime;
     }
 
+    /**
+     * Source also represents the root section, so it has no parent
+     *
+     * @return null
+     */
     @Override
+    @Contract(pure = true, value = "->null")
     public @Nullable ConfigureSection parent() {
-        return null; // Source also represents the root section, so it has no parent
+        return null;
-    }
-
-    @Override
-    public @NotNull ConfigureSource<?, ?, ?> source() {
-        return self();
     }
 
     @Override
@@ -80,8 +110,8 @@ public abstract class ConfigureSource<
     }
 
     @Override
-    public boolean isList(@NotNull String path) {
+    public void remove(@NotNull String path) {
-        return section().isList(path);
+        section().remove(path);
     }
 
     @Override
@@ -89,11 +119,6 @@ public abstract class ConfigureSource<
         return section().getList(path);
     }
 
-    @Override
-    public boolean isSection(@NotNull String path) {
-        return section().isSection(path);
-    }
-
     @Override
     public @Nullable ConfigureSection getSection(@NotNull String path) {
         return section().getSection(path);

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

@@ -113,7 +113,7 @@ public abstract class ConfigValue<T> extends ValueManifest<T> {
      * @param override Whether to overwrite existing configured value
      */
     public void setDefault(boolean override) {
-        if (!override && config().contains(path())) return;
+        if (config().contains(path()) && !override) return; // Skip if the value is already set
         set(defaults()); // Set the default value
     }
 

demo/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>easyconfiguration-parent</artifactId>
         <groupId>cc.carm.lib</groupId>
-        <version>4.0.0</version>
+        <version>4.0.2</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <properties>

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

@@ -46,8 +46,6 @@ public interface DemoConfiguration extends Configuration {
     @ConfigPath("registered_users") // 通过注解规定配置文件中的路径，若不进行注解则以变量名自动生成。
     @HeaderComments({"Section类型数据测试"}) // 通过注解给配置添加注释。
     @InlineComment("默认地注释会加到Section的首行末尾") // 通过注解给配置添加注释。
-    @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.*") // 通过注解给配置添加注释。
     ConfiguredList<UserRecord> ALLOWLISTS = ConfiguredList.builderOf(UserRecord.class).fromSection()
             .parse(UserRecord::deserialize).serialize(UserRecord::serialize)
             .defaults(UserRecord.CARM).build();
@@ -81,6 +79,7 @@ public interface DemoConfiguration extends Configuration {
                 .build();
 
         @HeaderComments({"内部类的内部类测试", "通过这种方式，您可以轻易实现多层次的配置文件结构"})
+        @FooterComments({"-------------"})
         public interface That extends Configuration {
 
             ConfiguredList<UUID> OPERATORS = ConfiguredList

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

@@ -18,6 +18,8 @@ public class RegistryConfig implements Configuration {
 
     @ConfigPath("test.user") // 通过注解规定配置文件中的路径，若不进行注解则以变量名自动生成。
     @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> TEST_MODEL = ConfiguredValue.builderOf(UserRecord.class).fromSection()
             .defaults(new UserRecord("Carm", UUID.randomUUID()))
             .parse((holder, section) -> UserRecord.deserialize(section))

features/commentable/pom.xml

@@ -6,7 +6,7 @@
     <parent>
         <groupId>cc.carm.lib</groupId>
         <artifactId>easyconfiguration-parent</artifactId>
-        <version>4.0.0</version>
+        <version>4.0.2</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <properties>

features/commentable/src/main/java/cc/carm/lib/configuration/annotation/InlineComment.java

@@ -33,7 +33,7 @@ public @interface InlineComment {
      * If the regex is not empty, the comment will be added to
      * all sub paths if the regex matches the value.
      * If the regex is empty, the comment will be added to the current path.
-     * <p> e.g. for section, set <b>{"^foo", "*", "bar"}</b> will be set like
+     * <p> e.g. for section, set <b>"foo.*.bar"</b> will be set like
      * <blockquote><pre>
      *   section:
      *     foo:
@@ -44,6 +44,9 @@ public @interface InlineComment {
      *         bar: "foobar" # Comment Contents
      * </pre></blockquote>
      *
+     * <p><i>Some implements may not support this feature
+     * in list values or other complex structures.</i>
+     *
      * @return The path regexes of this comment
      */
     @NotNull

features/commentable/src/main/java/cc/carm/lib/configuration/annotation/InlineComments.java

@@ -9,7 +9,12 @@ import java.lang.annotation.Target;
 @Retention(RetentionPolicy.RUNTIME)
 public @interface InlineComments {
 
-
+    /**
+     * Multiple inline comments support.
+     *
+     * @return inline comment contents.
+     * @see InlineComment
+     */
     InlineComment[] value();
 
 }

features/commentable/src/main/java/cc/carm/lib/configuration/commentable/Commentable.java

@@ -0,0 +1,66 @@
+package cc.carm.lib.configuration.commentable;
+
+import cc.carm.lib.configuration.source.ConfigurationHolder;
+import cc.carm.lib.configuration.source.loader.ConfigurationInitializer;
+import cc.carm.lib.configuration.source.option.StandardOptions;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.regex.Pattern;
+
+public class Commentable {
+
+    private Commentable() {
+        throw new UnsupportedOperationException();
+    }
+
+    public static void registerMeta(@NotNull ConfigurationInitializer initializer) {
+        CommentableMeta.register(initializer);
+    }
+
+    public static @Nullable String getInlineComment(@NotNull ConfigurationHolder<?> holder, @NotNull String path) {
+        String comment = getInlineComment(holder, path, null);
+        if (comment != null) return comment;
+
+        String sep = String.valueOf(holder.option(StandardOptions.PATH_SEPARATOR));
+
+        // If the comment is not found, try to get the comment from the parent section
+        String[] keys = path.split(Pattern.quote(sep));
+        if (keys.length == 1) return null;
+
+        // Try every possible parent key&child key combination
+        for (int i = 1; i < keys.length; i++) {
+            String parentKey = String.join(sep, Arrays.copyOfRange(keys, 0, i));
+            String childKey = String.join(sep, Arrays.copyOfRange(keys, i, keys.length));
+            comment = getInlineComment(holder, parentKey, childKey);
+            if (comment != null) return comment;
+        }
+        return null;
+    }
+
+    public static @Nullable String getInlineComment(@NotNull ConfigurationHolder<?> holder, @NotNull String path, @Nullable String sectionKey) {
+        Map<String, String> pathComment = holder.metadata(path).get(CommentableMeta.INLINE);
+        if (pathComment == null || pathComment.isEmpty()) return null;
+        if (sectionKey == null) return pathComment.get(null);
+        for (Map.Entry<String/*regex*/, String/*content*/> entry : pathComment.entrySet()) {
+            if (entry.getKey() == null) continue;
+            if (Objects.equals(entry.getKey(), sectionKey)) return entry.getValue();
+            Pattern pattern = Pattern.compile(entry.getKey().replace(".", "\\.").replace("*", "(.*)"));
+            if (pattern.matcher(sectionKey).matches()) return entry.getValue();
+        }
+        return null;
+    }
+
+    public static @Nullable List<String> getHeaderComments(@NotNull ConfigurationHolder<?> holder, @Nullable String path) {
+        return holder.metadata(path).get(CommentableMeta.HEADER);
+    }
+
+    public static @Nullable List<String> getFooterComments(@NotNull ConfigurationHolder<?> holder, @Nullable String path) {
+        return holder.metadata(path).get(CommentableMeta.FOOTER);
+    }
+
+}

features/commentable/src/main/java/cc/carm/lib/configuration/commentable/CommentableOptions.java

@@ -1,4 +1,4 @@
-package cc.carm.lib.configuration.option;
+package cc.carm.lib.configuration.commentable;
 
 import cc.carm.lib.configuration.source.option.ConfigurationOption;
 

features/file/pom.xml

@@ -6,7 +6,7 @@
     <parent>
         <groupId>cc.carm.lib</groupId>
         <artifactId>easyconfiguration-parent</artifactId>
-        <version>4.0.0</version>
+        <version>4.0.2</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <properties>

features/section/pom.xml

@@ -6,7 +6,7 @@
     <parent>
         <groupId>cc.carm.lib</groupId>
         <artifactId>easyconfiguration-parent</artifactId>
-        <version>4.0.0</version>
+        <version>4.0.2</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <properties>

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

@@ -53,7 +53,6 @@ public class MemorySection implements ConfigureSection {
         return createChild(new LinkedHashMap<>());
     }
 
-    @Override
     public @NotNull ConfigureSource<? extends MemorySection, ?, ?> source() {
         return this.source;
     }
@@ -66,6 +65,10 @@ public class MemorySection implements ConfigureSection {
         return this.parent;
     }
 
+    public char pathSeparator() {
+        return source.pathSeparator();
+    }
+
     @Override
     public @NotNull Map<String, Object> getValues(boolean deep) {
         return Collections.unmodifiableMap(deep ? mapChildrenValues(this, null, true) : data());
@@ -85,6 +88,16 @@ public class MemorySection implements ConfigureSection {
         }
     }
 
+    @Override
+    public void remove(@NotNull String path) {
+        MemorySection section = getSectionFor(path);
+        if (section != this) {
+            section.remove(childPath(path));
+        } else {
+            this.data.remove(path);
+        }
+    }
+
     @Override
     public boolean contains(@NotNull String path) {
         return get(path) != null;
@@ -109,7 +122,7 @@ public class MemorySection implements ConfigureSection {
     }
 
     private MemorySection getSectionFor(String path) {
-        int index = path.indexOf(separator());
+        int index = path.indexOf(pathSeparator());
         if (index == -1) return this;
 
         String root = path.substring(0, index);
@@ -123,7 +136,7 @@ public class MemorySection implements ConfigureSection {
     }
 
     private String childPath(String path) {
-        int index = path.indexOf(separator());
+        int index = path.indexOf(pathSeparator());
         return (index == -1) ? path : path.substring(index + 1);
     }
 
@@ -138,7 +151,7 @@ public class MemorySection implements ConfigureSection {
                                                     @Nullable String parent, boolean deep) {
         Map<String, Object> output = new LinkedHashMap<>();
         for (Map.Entry<String, Object> entry : section.data().entrySet()) {
-            String path = (parent == null ? "" : parent + separator()) + entry.getKey();
+            String path = (parent == null ? "" : parent + pathSeparator()) + entry.getKey();
             output.remove(path);
             output.put(path, entry.getValue());
             if (deep && entry.getValue() instanceof MemorySection) {

features/text/pom.xml

@@ -0,0 +1,60 @@
+<?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>easyconfiguration-parent</artifactId>
+        <version>4.0.2</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>easyconfiguration-feature-text</artifactId>
+    <packaging>jar</packaging>
+
+    <dependencies>
+
+        <dependency>
+            <groupId>${project.groupId}</groupId>
+            <artifactId>easyconfiguration-core</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+
+        <dependency>
+            <groupId>${project.groupId}</groupId>
+            <artifactId>easyconfiguration-yaml</artifactId>
+            <version>${project.version}</version>
+            <scope>test</scope>
+        </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/text/src/main/java/cc/carm/lib/configuration/value/text/ConfiguredText.java

@@ -0,0 +1,196 @@
+package cc.carm.lib.configuration.value.text;
+
+import cc.carm.lib.configuration.adapter.ValueAdapter;
+import cc.carm.lib.configuration.adapter.ValueType;
+import cc.carm.lib.configuration.builder.AbstractConfigBuilder;
+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;
+
+import java.util.List;
+import java.util.function.BiConsumer;
+import java.util.function.BiFunction;
+import java.util.function.Consumer;
+
+/**
+ * @param <MSG>      The type of the message
+ * @param <RECEIVER> The type of the receiver
+ */
+public class ConfiguredText<MSG, RECEIVER> extends ConfiguredValue<TextContents> {
+
+    public static <M, R> Builder<M, R, ?> builder() {
+        return new StardardBuilder<>();
+    }
+
+    public static final ValueType<TextContents> TEXT_TYPE = ValueType.of(TextContents.class);
+    public static final ValueAdapter<TextContents> TEXT_ADAPTER = new ValueAdapter<>(TEXT_TYPE,
+            (h, t, d) -> d.serialize(),
+            (h, t, d) -> TextContents.deserialize(d)
+    );
+
+    protected final @NotNull BiFunction<RECEIVER, String, String> parser;
+    protected final @NotNull BiFunction<RECEIVER, String, MSG> compiler;
+    protected final @NotNull BiConsumer<RECEIVER, List<MSG>> dispatcher;
+
+    protected final @NotNull String[] params; // The parameters of the message.
+
+    public ConfiguredText(@NotNull ValueManifest<TextContents> manifest,
+                          @NotNull BiFunction<RECEIVER, String, String> parser,
+                          @NotNull BiFunction<RECEIVER, String, MSG> compiler,
+                          @NotNull BiConsumer<RECEIVER, List<MSG>> dispatcher,
+                          @NotNull String[] params) {
+        super(manifest, TEXT_ADAPTER);
+        this.parser = parser;
+        this.compiler = compiler;
+        this.dispatcher = dispatcher;
+        this.params = params;
+    }
+
+    public TextDispatcher<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);
+    }
+
+    /**
+     * Parse the message for the receiver.
+     *
+     * @param receiver The receiver of the message.
+     * @param values   The values to replace the {@link #params}.
+     * @return The parsed message.
+     */
+    public List<String> parse(@Nullable RECEIVER receiver, @NotNull Object... values) {
+        return prepare(values).parse(receiver);
+    }
+
+    /**
+     * Parse the message for the receiver and send it.
+     *
+     * @param receiver The receiver of the message.
+     * @param values   The values to replace the {@link #params}.
+     * @return The parsed message.
+     */
+    public String parseLine(@Nullable RECEIVER receiver, @NotNull Object... values) {
+        return prepare(values).parseLine(receiver);
+    }
+
+    /**
+     * Compile the message for the receiver.
+     *
+     * @param receiver The receiver of the message.
+     * @param values   The values to replace the {@link #params}.
+     * @return The compiled message.
+     */
+    public List<MSG> compile(@Nullable RECEIVER receiver, @NotNull Object... values) {
+        return prepare(values).compile(receiver);
+    }
+
+    /**
+     * Compile the message for the receiver and send it.
+     *
+     * @param receiver The receiver of the message.
+     * @param values   The values to replace the {@link #params}.
+     * @return The compiled message.
+     */
+    public MSG compileLine(@Nullable RECEIVER receiver, @NotNull Object... values) {
+        return prepare(values).compileLine(receiver);
+    }
+
+    /**
+     * Send the message to the receiver.
+     *
+     * @param receiver The receiver of the message.
+     * @param values   The values to replace the {@link #params}.
+     */
+    public void sendTo(@NotNull RECEIVER receiver, @NotNull Object... values) {
+        prepare(values).to(receiver);
+    }
+
+    /**
+     * Send the message to the multiple receivers.
+     *
+     * @param receivers The receivers of the message.
+     * @param values    The values to replace the {@link #params}.
+     */
+    public void sendToAll(@NotNull Iterable<? extends RECEIVER> receivers, @NotNull Object... values) {
+        prepare(values).to(receivers);
+    }
+
+    public abstract static class Builder<MSG, RECEIVER, SELF extends Builder<MSG, RECEIVER, SELF>>
+            extends AbstractConfigBuilder<TextContents, ConfiguredText<MSG, RECEIVER>, ConfigurationHolder<?>, SELF> {
+        protected @NotNull TextContents.Builder defaultBuilder = TextContents.builder();
+        protected @NotNull String[] params = new String[0];
+
+        protected @NotNull BiFunction<RECEIVER, String, String> parser = (r, s) -> s;
+        protected @NotNull BiFunction<RECEIVER, String, MSG> compiler = (r, s) -> {
+            throw new IllegalStateException("Compiler not supplied.");
+        };
+        protected @NotNull BiConsumer<RECEIVER, List<MSG>> dispatcher = (r, l) -> {
+            throw new IllegalStateException("Dispatcher not supplied.");
+        };
+
+        protected Builder() {
+            super(ConfigurationHolder.class, TEXT_TYPE);
+            defaults(() -> defaultBuilder.build()); // Set the default value from the default builder.
+        }
+
+        public @NotNull SELF parser(@NotNull BiFunction<RECEIVER, String, String> parser) {
+            this.parser = parser;
+            return self();
+        }
+
+        public @NotNull SELF compiler(@NotNull BiFunction<RECEIVER, String, MSG> compiler) {
+            this.compiler = compiler;
+            return self();
+        }
+
+        public @NotNull SELF dispatcher(@NotNull BiConsumer<RECEIVER, List<MSG>> dispatcher) {
+            this.dispatcher = dispatcher;
+            return self();
+        }
+
+        public @NotNull SELF params(@NotNull String... params) {
+            this.params = params;
+            return self();
+        }
+
+        public @NotNull SELF defaults(@NotNull Consumer<TextContents.Builder> consumer) {
+            consumer.accept(this.defaultBuilder);
+            return self();
+        }
+
+        public @NotNull SELF defaults(@NotNull String... contents) {
+            return defaults(builder -> builder.set(contents));
+        }
+
+        public @NotNull SELF defaults(@NotNull Iterable<String> contents) {
+            return defaults(builder -> builder.set(contents));
+        }
+
+        public @NotNull SELF optional(@NotNull String id, @NotNull String... lines) {
+            return defaults(builder -> builder.optional(id, lines));
+        }
+
+        public @NotNull SELF optional(@NotNull String id, @NotNull Iterable<String> lines) {
+            return defaults(builder -> builder.optional(id, lines));
+        }
+
+        @Override
+        public @NotNull ConfiguredText<MSG, RECEIVER> build() {
+            return new ConfiguredText<>(buildManifest(), this.parser, this.compiler, this.dispatcher, this.params);
+        }
+
+    }
+
+    public static class StardardBuilder<MSG, RECEIVER> extends Builder<MSG, RECEIVER, StardardBuilder<MSG, RECEIVER>> {
+        @Override
+        protected @NotNull StardardBuilder<MSG, RECEIVER> self() {
+            return this;
+        }
+    }
+
+}

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

@@ -0,0 +1,32 @@
+package cc.carm.lib.configuration.value.text;
+
+import cc.carm.lib.configuration.value.text.data.TextContents;
+import cc.carm.lib.configuration.value.text.function.TextDispatcher;
+import org.jetbrains.annotations.NotNull;
+
+public class PreparedText<MSG, RECEIVER> extends TextDispatcher<MSG, RECEIVER, PreparedText<MSG, RECEIVER>> {
+
+    protected final @NotNull TextContents texts;
+
+    public PreparedText(@NotNull TextContents texts, @NotNull String... params) {
+        this.params = params;
+        this.texts = texts;
+    }
+
+    @Override
+    public TextContents texts() {
+        return this.texts;
+    }
+
+    @Override
+    public PreparedText<MSG, RECEIVER> self() {
+        return this;
+    }
+
+    public PreparedText<MSG, RECEIVER> insert(@NotNull String key,
+                                              @NotNull ConfiguredText<?, RECEIVER> message,
+                                              @NotNull Object... values) {
+        return insert(key, receiver -> message.parse(receiver, values));
+    }
+
+}

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

@@ -0,0 +1,160 @@
+package cc.carm.lib.configuration.value.text.data;
+
+import cc.carm.lib.configuration.source.section.ConfigureSection;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.*;
+
+public class TextContents {
+
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    public static TextContents of(@NotNull List<String> lines, @NotNull Map<String, List<String>> optional) {
+        return new TextContents(lines, optional);
+    }
+
+    protected final @NotNull List<String> lines;
+    protected final @NotNull Map<String, List<String>> optional;
+
+    public TextContents(@NotNull List<String> lines, @NotNull Map<String, List<String>> optional) {
+        this.lines = lines;
+        this.optional = optional;
+    }
+
+    public boolean isEmpty() {
+        return lines.isEmpty() || lines.stream().allMatch(String::isEmpty);
+    }
+
+    public @NotNull List<String> lines() {
+        return lines;
+    }
+
+    public @NotNull Map<String, List<String>> optionalLines() {
+        return optional;
+    }
+
+    public @Nullable Object serialize() {
+        if (optional.isEmpty()) {
+            if (lines.isEmpty()) return null;
+            else if (lines.size() == 1) return lines.get(0);
+            else return lines;
+        } else {
+            Map<String, Object> map = new LinkedHashMap<>();
+            map.put("contents", lines);
+            map.put("optional", optional);
+            return map;
+        }
+    }
+
+    public static @Nullable TextContents deserialize(@NotNull Object data) {
+        Builder builder = builder();
+        if (data instanceof String) {
+            return builder.set((String) data).build();
+        } else if (data instanceof List<?>) {
+            ((List<?>) data).stream().map(Object::toString).forEach(builder::add);
+            return builder.build();
+        } else if (data instanceof ConfigureSection) {
+            ConfigureSection section = (ConfigureSection) data;
+            builder.set(section.getStringList("contents"));
+
+            ConfigureSection optionalSection = section.getSection("optional");
+            if (optionalSection != null) {
+                for (String key : optionalSection.getKeys(false)) {
+                    builder.optional(key, optionalSection.getStringList(key));
+                }
+            }
+            return builder.build();
+        }
+        return null;
+    }
+
+    public static class Builder {
+
+        protected List<String> lines = new ArrayList<>();
+        protected Map<String, List<String>> optional = new HashMap<>();
+
+        /**
+         * Add lines to the contents
+         *
+         * @param lines lines to add
+         * @return this builder
+         */
+        public Builder add(@NotNull String... lines) {
+            this.lines.addAll(Arrays.asList(lines));
+            return this;
+        }
+
+        /**
+         * Add lines to the contents
+         *
+         * @param lines lines to add
+         * @return this builder
+         */
+        public Builder add(@NotNull Iterable<String> lines) {
+            lines.forEach(this.lines::add);
+            return this;
+        }
+
+        /**
+         * Set the lines of the contents
+         *
+         * @param lines lines to set
+         * @return this builder
+         */
+        public Builder set(@NotNull String... lines) {
+            this.lines = Arrays.asList(lines);
+            return this;
+        }
+
+        /**
+         * Set the lines of the contents
+         *
+         * @param lines lines to set
+         * @return this builder
+         */
+        public Builder set(@NotNull Iterable<String> lines) {
+            this.lines = new ArrayList<>();
+            lines.forEach(this.lines::add);
+            return this;
+        }
+
+        /**
+         * Add optional lines to the contents
+         *
+         * @param key   key of the optional lines
+         * @param lines lines to add
+         * @return this builder
+         */
+        public Builder optional(@NotNull String key, @NotNull String... lines) {
+            optional.put(key, Arrays.asList(lines));
+            return this;
+        }
+
+        /**
+         * Add optional lines to the contents
+         *
+         * @param key   key of the optional lines
+         * @param lines lines to add
+         * @return this builder
+         */
+        public Builder optional(@NotNull String key, @NotNull Iterable<String> lines) {
+            List<String> list = new ArrayList<>();
+            lines.forEach(list::add);
+            optional.put(key, list);
+            return this;
+        }
+
+        /**
+         * @return The built TextContents
+         */
+        public TextContents build() {
+            return of(lines, optional);
+        }
+
+    }
+
+
+}

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

@@ -0,0 +1,259 @@
+package cc.carm.lib.configuration.value.text.function;
+
+import cc.carm.lib.configuration.value.text.data.TextContents;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.*;
+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> 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+))?})?$"
+    );
+    public static final @NotNull UnaryOperator<String> DEFAULT_PARAM_BUILDER = s -> "%(" + s + ")";
+
+    protected BiFunction<RECEIVER, String, String> parser = (receiver, value) -> value;
+    protected String lineSeparator = System.lineSeparator();
+
+    /**
+     * 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 String[] params;
+
+    /**
+     * Used to store the insertion of the message
+     */
+    protected @NotNull Map<String, Function<RECEIVER, List<String>>> insertion = new HashMap<>();
+    protected boolean disableInsertion = false;
+
+    public abstract SELF self();
+
+    /**
+     * Disable the insertion of the text.
+     * <br> If the insertion is disabled, the text will be parsed directly.
+     *
+     * @return the current {@link ContentHandler} instance
+     */
+    public SELF disableInsertion() {
+        this.disableInsertion = true;
+        return self();
+    }
+
+    /**
+     * Enable the insertion of the text.
+     *
+     * @return the current {@link ContentHandler} instance
+     */
+    public SELF enableInsertion() {
+        this.disableInsertion = false;
+        return self();
+    }
+
+    /**
+     * Set the line separator for the text.
+     *
+     * @param lineSeparator the line separator, default is {@link System#lineSeparator()}
+     * @return the current {@link ContentHandler} instance
+     */
+    public SELF lineSeparator(@NotNull String lineSeparator) {
+        this.lineSeparator = lineSeparator;
+        return self();
+    }
+
+    /**
+     * Set all the placeholders for the text.
+     * <br> Will override the previous placeholders modifications.
+     *
+     * @param placeholders the placeholders
+     * @return the current {@link ContentHandler} instance
+     */
+    public SELF placeholders(@NotNull Map<String, Object> placeholders) {
+        this.placeholders = placeholders;
+        return self();
+    }
+
+    /**
+     * Set the placeholders for the text.
+     *
+     * @param consumer the placeholders
+     * @return the current {@link ContentHandler} instance
+     */
+    public SELF placeholders(@NotNull Consumer<Map<String, Object>> consumer) {
+        consumer.accept(this.placeholders);
+        return self();
+    }
+
+    /**
+     * Set the placeholders for the text.
+     *
+     * @param values The values to replace the {@link #params(String...)}.
+     * @return the current {@link ContentHandler} instance
+     */
+    public SELF placeholders(@Nullable Object... values) {
+        return placeholders(map -> map.putAll(buildParams(this.paramFormatter, this.params, values)));
+    }
+
+    /**
+     * Set the placeholder for the text.
+     *
+     * @param key   the key of the placeholder
+     * @param value the value of the placeholder
+     * @return the current {@link ContentHandler} instance
+     */
+    public SELF placeholder(@NotNull String key, @Nullable Object value) {
+        this.placeholders.put(paramFormatter.apply(key), value);
+        return self();
+    }
+
+    /**
+     * Set the params for the text,
+     * used for {@link #placeholders(Object...)} to build the placeholders.
+     *
+     * @param params the params
+     * @return the current {@link ContentHandler} instance
+     */
+    public SELF params(@NotNull String... params) {
+        this.params = params;
+        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);
+        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));
+    }
+
+    /**
+     * 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);
+    }
+
+    /**
+     * Set the parser for the text.
+     *
+     * @param parser The parser
+     * @return The current {@link ContentHandler} instance
+     */
+    public SELF parser(@NotNull BiFunction<RECEIVER, String, String> parser) {
+        this.parser = parser;
+        return self();
+    }
+
+    /**
+     * Parse the supplied single text for the receiver.
+     *
+     * @param receiver the receiver
+     * @param text     the text to parse
+     * @return the parsed text
+     */
+    protected @Nullable String parse(@Nullable RECEIVER receiver, @NotNull String text) {
+        return this.parser.apply(receiver, setPlaceholders(text, this.placeholders));
+    }
+
+    public void handle(@NotNull TextContents contents, @Nullable RECEIVER receiver,
+                       @NotNull Consumer<String> lineConsumer) {
+        if (contents.isEmpty()) return; // Nothing to parse
+
+        if (this.disableInsertion) {
+            contents.lines().forEach(line -> lineConsumer.accept(parse(receiver, line)));
+            return; // Simple parsed
+        }
+
+        for (String line : contents.lines()) {
+            Matcher matcher = INSERT_PATTERN.matcher(line);
+            if (!matcher.matches()) {
+                lineConsumer.accept(parse(receiver, line));
+                continue;
+            }
+
+            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()) continue;
+
+            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<>();
+        if (params == null || params.length == 0) return map;
+        for (int i = 0; i < params.length; i++) {
+            map.put(paramBuilder.apply(params[i]), (values != null && values.length > i) ? values[i] : "?");
+        }
+        return map;
+    }
+
+}

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

@@ -0,0 +1,45 @@
+package cc.carm.lib.configuration.value.text.function;
+
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.List;
+import java.util.function.BiFunction;
+
+public abstract class TextCompiler<MSG, RECEIVER, SELF extends TextCompiler<MSG, RECEIVER, SELF>> extends TextParser<RECEIVER, SELF> {
+
+    protected BiFunction<RECEIVER, String, MSG> compiler = (receiver, value) -> null;
+
+    /**
+     * Set the text compiler.
+     *
+     * @param compiler The text compiler.
+     * @return The current {@link TextCompiler} instance.
+     */
+    public SELF compiler(@NotNull BiFunction<RECEIVER, String, MSG> compiler) {
+        this.compiler = compiler;
+        return self();
+    }
+
+    /**
+     * Compile the text for specific receiver.
+     *
+     * @param receiver The receiver.
+     * @return The compiled text.
+     * @see #parse(Object, BiFunction)
+     */
+    public @NotNull List<MSG> compile(@Nullable RECEIVER receiver) {
+        return parse(receiver, this.compiler);
+    }
+
+    /**
+     * Compile the singleton text for specific receiver.
+     *
+     * @param receiver The receiver.
+     * @return The compiled text.
+     * @see #parseLine(Object, BiFunction)
+     */
+    public @Nullable MSG compileLine(@Nullable RECEIVER receiver) {
+        return parseLine(receiver, this.compiler);
+    }
+}

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

@@ -0,0 +1,61 @@
+package cc.carm.lib.configuration.value.text.function;
+
+import cc.carm.lib.configuration.value.text.data.TextContents;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.function.BiConsumer;
+import java.util.function.Supplier;
+
+public abstract class TextDispatcher<MSG, RECEIVER, SELF extends TextDispatcher<MSG, RECEIVER, SELF>> extends TextCompiler<MSG, RECEIVER, SELF> {
+
+    protected @NotNull BiConsumer<RECEIVER, List<MSG>> dispatcher = (receiver, msg) -> {
+    };
+
+    /**
+     * Set the dispatcher to send the message to the receiver
+     *
+     * @param dispatcher the dispatcher
+     * @return {@link TextDispatcher}
+     */
+    public SELF dispatcher(@NotNull BiConsumer<RECEIVER, List<MSG>> dispatcher) {
+        this.dispatcher = dispatcher;
+        return self();
+    }
+
+
+    /**
+     * Dispatch the message to the receiver
+     *
+     * @param receivers the receivers
+     */
+    @SafeVarargs
+    public final void to(@NotNull RECEIVER... receivers) {
+        if (receivers.length == 0) return;
+        to(Arrays.asList(receivers));
+    }
+
+    /**
+     * Dispatch the message to the receiver
+     *
+     * @param receivers the receivers
+     */
+    public void to(@NotNull Iterable<? extends RECEIVER> receivers) {
+        for (RECEIVER receiver : receivers) {
+            List<MSG> msg = compile(receiver);
+            if (msg.isEmpty()) return;
+            dispatcher.accept(receiver, msg);
+        }
+    }
+
+    /**
+     * Dispatch the message to the receiver
+     *
+     * @param receivers the receivers
+     */
+    public void to(@NotNull Supplier<Iterable<? extends RECEIVER>> receivers) {
+        to(receivers.get());
+    }
+
+}

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

@@ -0,0 +1,74 @@
+package cc.carm.lib.configuration.value.text.function;
+
+import cc.carm.lib.configuration.value.text.data.TextContents;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+import java.util.function.BiFunction;
+import java.util.function.Consumer;
+
+public abstract class TextParser<RECEIVER, SELF extends TextParser<RECEIVER, SELF>>
+        extends ContentHandler<RECEIVER, SELF> {
+
+    public abstract TextContents texts();
+
+    /**
+     * Parse the texts for the receiver.
+     *
+     * @param receiver the receiver
+     * @return the parsed line
+     */
+    public List<String> parse(@Nullable RECEIVER receiver) {
+        List<String> result = new ArrayList<>();
+        handle(receiver, result::add);
+        return result;
+    }
+
+    /**
+     * Parse the texts for the receiver.
+     *
+     * @param receiver the receiver
+     * @param compiler the compiler
+     * @param <V>      the type of the message
+     * @return the parsed line
+     */
+    public <V> List<V> parse(@Nullable RECEIVER receiver, @NotNull BiFunction<RECEIVER, String, V> compiler) {
+        List<V> result = new ArrayList<>();
+        handle(receiver, s -> result.add(compiler.apply(receiver, s)));
+        return result;
+    }
+
+    /**
+     * Parse the texts as a single line for the receiver.
+     *
+     * @param receiver the receiver
+     * @return the parsed line
+     */
+    public @Nullable String parseLine(@Nullable RECEIVER receiver) {
+        if (texts().isEmpty()) return null;
+        StringBuilder builder = new StringBuilder();
+        handle(receiver, s -> builder.append(s).append(this.lineSeparator));
+        // Remove the last line separator, if it exists
+        if (builder.length() > 0) builder.delete(builder.length() - this.lineSeparator.length(), builder.length());
+        return builder.toString();
+    }
+
+    /**
+     * Parse the texts as a single line for the receiver.
+     *
+     * @param receiver the receiver
+     * @param <V>      the type of the message
+     * @return the parsed line
+     */
+    public <V> @Nullable V parseLine(@Nullable RECEIVER receiver, @NotNull BiFunction<RECEIVER, String, V> compiler) {
+        return Optional.ofNullable(parseLine(receiver)).map(s -> compiler.apply(receiver, s)).orElse(null);
+    }
+
+    public void handle(@Nullable RECEIVER receiver, @NotNull Consumer<String> lineConsumer) {
+        handle(texts(), receiver, lineConsumer);
+    }
+
+}

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

@@ -0,0 +1,47 @@
+package cc.carm.lib.configuration.value.text.tests;
+
+
+import cc.carm.lib.configuration.source.ConfigurationHolder;
+import cc.carm.lib.configuration.source.yaml.YAMLConfigFactory;
+import cc.carm.lib.configuration.value.text.tests.conf.AppMessages;
+import org.junit.Test;
+
+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() {
+
+        ConfigurationHolder<?> holder = YAMLConfigFactory.from("target/messages.yml").build();
+
+        holder.initialize(AppMessages.class);
+
+        System.out.println("--------------------------");
+
+        AppMessages.WELCOME.prepare()
+                .placeholders("Carm")
+                .insert("guidance")
+                .insert("websites", WEBSITES)
+                .to(System.out);
+
+        System.out.println("--------------------------");
+
+        AppMessages.NOT_AVAILABLE.sendTo(System.out);
+
+        System.out.println("--------------------------");
+
+        AppMessages.NO_PERMISSION.sendTo(System.out);
+
+        System.out.println("--------------------------");
+
+    }
+
+
+}

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

@@ -0,0 +1,49 @@
+package cc.carm.lib.configuration.value.text.tests;
+
+import cc.carm.lib.configuration.value.text.PreparedText;
+import cc.carm.lib.configuration.value.text.data.TextContents;
+import org.junit.Test;
+
+import java.io.PrintStream;
+import java.util.*;
+
+public class ParseTest {
+
+
+    @Test
+    public void test() {
+
+        List<String> lines = new ArrayList<>();
+        lines.add("Hello, %(name)");
+        lines.add("#more-creating#{1}");
+        lines.add("This is a test message");
+        lines.add("#guidance#");
+        lines.add("{- }#websites#{0,1}");
+        lines.add("Thanks for your reading!");
+
+
+        Map<String, List<String>> optional = new HashMap<>();
+        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);
+
+        PreparedText<String, PrintStream> msg = new PreparedText<String, PrintStream>(textContents)
+                .dispatcher((p, s) -> s.forEach(p::println))
+                .parser((p, s) -> s)
+                .compiler((p, s) -> s);
+
+        msg.placeholder("name", "Carm")
+                .insert("guidance")
+                .insert("websites", "Baidu", "Bilibili", "Google");
+
+        System.out.println("----------------------------");
+        msg.to(System.out);
+        System.out.println("----------------------------");
+        System.out.println(msg.compileLine(System.out));
+        System.out.println("----------------------------");
+
+    }
+
+
+}

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

@@ -0,0 +1,28 @@
+package cc.carm.lib.configuration.value.text.tests.conf;
+
+import cc.carm.lib.configuration.Configuration;
+import cc.carm.lib.configuration.annotation.ConfigPath;
+
+@ConfigPath(root = true)
+public interface AppMessages extends Configuration {
+
+    ConfiguredMsg WELCOME = ConfiguredMsg.builder()
+            .defaults(
+                    "Hello, %(name)",
+                    "#more-creating#{1}",
+                    "This is a test message",
+                    "#guidance#",
+                    "{- }#websites#{0,1}",
+                    "Thanks for your reading!")
+            .optional("guidance", "To get more information for %(name), see:")
+            .params("name").build();
+
+    ConfiguredMsg NO_PERMISSION = ConfiguredMsg.builder()
+            .defaults("Sorry! But you don't have permissions to do this.")
+            .build();
+
+    ConfiguredMsg NOT_AVAILABLE = ConfiguredMsg.builder()
+            .defaults("Error! Service is not available now.", "Please contact your system manager.")
+            .build();
+
+}

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

@@ -0,0 +1,47 @@
+package cc.carm.lib.configuration.value.text.tests.conf;
+
+import cc.carm.lib.configuration.value.ValueManifest;
+import cc.carm.lib.configuration.value.text.ConfiguredText;
+import cc.carm.lib.configuration.value.text.data.TextContents;
+import org.jetbrains.annotations.NotNull;
+
+import java.io.PrintStream;
+
+public class ConfiguredMsg extends ConfiguredText<String, PrintStream> {
+
+    public static @NotNull MsgBuilder builder() {
+        return new MsgBuilder();
+    }
+
+    public static @NotNull ConfiguredMsg of(@NotNull String... text) {
+        return builder().defaults(text).build();
+    }
+
+    public ConfiguredMsg(@NotNull ValueManifest<TextContents> manifest, @NotNull String[] params) {
+        super(
+                manifest,
+                (p, s) -> s,
+                (p, s) -> s,
+                (p, s) -> s.forEach(p::println),
+                params
+        );
+    }
+
+    public void print(@NotNull Object... values) {
+        sendTo(System.out, values);
+    }
+
+    public static class MsgBuilder extends Builder<String, PrintStream, MsgBuilder> {
+
+        @Override
+        protected @NotNull MsgBuilder self() {
+            return this;
+        }
+
+        @Override
+        public @NotNull ConfiguredMsg build() {
+            return new ConfiguredMsg(buildManifest(), params);
+
+        }
+    }
+}

features/versioned/pom.xml

@@ -6,7 +6,7 @@
     <parent>
         <groupId>cc.carm.lib</groupId>
         <artifactId>easyconfiguration-parent</artifactId>
-        <version>4.0.0</version>
+        <version>4.0.2</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <properties>

pom.xml

@@ -15,13 +15,14 @@
     <groupId>cc.carm.lib</groupId>
     <artifactId>easyconfiguration-parent</artifactId>
     <packaging>pom</packaging>
-    <version>4.0.0</version>
+    <version>4.0.2</version>
     <modules>
         <module>core</module>
         <module>features/section</module>
         <module>features/file</module>
         <module>features/commentable</module>
         <module>features/versioned</module>
+        <module>features/text</module>
 
         <module>providers/yaml</module>
         <module>providers/gson</module>

providers/gson/pom.xml

@@ -5,7 +5,7 @@
     <parent>
         <artifactId>easyconfiguration-parent</artifactId>
         <groupId>cc.carm.lib</groupId>
-        <version>4.0.0</version>
+        <version>4.0.2</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>

providers/gson/src/main/java/cc/carm/lib/configuration/source/json/JSONSource.java

@@ -48,7 +48,7 @@ public class JSONSource extends FileConfigSource<MemorySection, Map<String, Obje
     }
 
     @Override
-    protected JSONSource self() {
+    protected @NotNull JSONSource self() {
         return this;
     }
 

providers/yaml/pom.xml

@@ -6,7 +6,7 @@
     <parent>
         <artifactId>easyconfiguration-parent</artifactId>
         <groupId>cc.carm.lib</groupId>
-        <version>4.0.0</version>
+        <version>4.0.2</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <properties>
@@ -14,7 +14,7 @@
         <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>
-        <deps.yamlcommentwriter.version>1.1.0</deps.yamlcommentwriter.version>
+        <deps.yamlcommentwriter.version>1.2.0</deps.yamlcommentwriter.version>
     </properties>
 
     <artifactId>easyconfiguration-yaml</artifactId>
@@ -32,7 +32,7 @@
         <dependency>
             <groupId>cc.carm.lib</groupId>
             <artifactId>yamlcommentwriter</artifactId>
-            <version>1.1.0</version>
+            <version>1.2.0</version>
             <scope>compile</scope>
         </dependency>
 

providers/yaml/src/main/java/cc/carm/lib/configuration/source/yaml/YAMLConfigFactory.java

@@ -1,5 +1,6 @@
 package cc.carm.lib.configuration.source.yaml;
 
+import cc.carm.lib.configuration.commentable.Commentable;
 import cc.carm.lib.configuration.commentable.CommentableMeta;
 import cc.carm.lib.configuration.source.ConfigurationHolder;
 import cc.carm.lib.configuration.source.file.FileConfigFactory;
@@ -125,7 +126,7 @@ public class YAMLConfigFactory extends FileConfigFactory<YAMLSource, Configurati
         File configFile = this.file;
         String sourcePath = this.resourcePath;
 
-        CommentableMeta.register(this.initializer); // Register commentable meta types
+        Commentable.registerMeta(this.initializer); // Register commentable meta types
 
         return new ConfigurationHolder<YAMLSource>(this.adapters, this.options, this.metadata, this.initializer) {
             final @NotNull YAMLSource source = new YAMLSource(this, configFile, sourcePath);

providers/yaml/src/main/java/cc/carm/lib/configuration/source/yaml/YAMLSource.java

@@ -1,10 +1,9 @@
 package cc.carm.lib.configuration.source.yaml;
 
-import cc.carm.lib.configuration.commentable.CommentableMeta;
+import cc.carm.lib.configuration.commentable.Commentable;
-import cc.carm.lib.configuration.option.CommentableOptions;
+import cc.carm.lib.configuration.commentable.CommentableOptions;
 import cc.carm.lib.configuration.source.ConfigurationHolder;
 import cc.carm.lib.configuration.source.file.FileConfigSource;
-import cc.carm.lib.configuration.source.option.StandardOptions;
 import cc.carm.lib.configuration.source.section.ConfigureSection;
 import cc.carm.lib.configuration.source.section.MemorySection;
 import cc.carm.lib.yamlcommentupdater.CommentedSection;
@@ -25,9 +24,10 @@ import java.io.Reader;
 import java.io.StringWriter;
 import java.nio.charset.StandardCharsets;
 import java.util.*;
-import java.util.regex.Pattern;
 
-public class YAMLSource extends FileConfigSource<MemorySection, Map<String, Object>, YAMLSource> implements CommentedSection {
+public class YAMLSource
+        extends FileConfigSource<MemorySection, Map<String, Object>, YAMLSource>
+        implements CommentedSection {
 
     protected final @NotNull YamlConstructor yamlConstructor;
     protected final @NotNull YamlRepresenter yamlRepresenter;
@@ -55,7 +55,7 @@ public class YAMLSource extends FileConfigSource<MemorySection, Map<String, Obje
     }
 
     @Override
-    protected YAMLSource self() {
+    protected @NotNull YAMLSource self() {
         return null;
     }
 
@@ -69,11 +69,6 @@ public class YAMLSource extends FileConfigSource<MemorySection, Map<String, Obje
         return Objects.requireNonNull(this.rootSection, "Root section is not initialized.");
     }
 
-    @Override
-    public char separator() {
-        return holder().options().get(StandardOptions.PATH_SEPARATOR);
-    }
-
     public @NotNull LoaderOptions loaderOptions() {
         return holder().options().get(YAMLOptions.LOADER);
     }
@@ -114,9 +109,9 @@ public class YAMLSource extends FileConfigSource<MemorySection, Map<String, Obje
     @Override
     public void save() throws Exception {
         CommentedYAMLWriter writer = new CommentedYAMLWriter(
-                String.valueOf(this.separator()),
+                String.valueOf(this.pathSeparator()),
                 dumperOptions().getIndent(),
-                holder.options().get(CommentableOptions.COMMENT_EMPTY_VALUE)
+                holder.option(CommentableOptions.COMMENT_EMPTY_VALUE)
         );
         try {
             fileWriter(w -> w.write(writer.saveToString(this)));
@@ -193,46 +188,17 @@ public class YAMLSource extends FileConfigSource<MemorySection, Map<String, Obje
 
     @Override
     public @Nullable String getInlineComment(@NotNull String key) {
-        String comment = getInlineComment(key, null);
+        return Commentable.getInlineComment(holder(), key);
-        if (comment != null) return comment;
-
-        String sep = String.valueOf(separator());
-
-        // If the comment is not found, try to get the comment from the parent section
-        String[] keys = key.split(sep);
-        if (keys.length == 1) return null;
-
-        // Try every possible parent key&child key combination
-        for (int i = 1; i < keys.length; i++) {
-            String parentKey = String.join(sep, Arrays.copyOfRange(keys, 0, i));
-            String childKey = String.join(sep, Arrays.copyOfRange(keys, i, keys.length));
-            comment = getInlineComment(childKey, parentKey);
-            if (comment != null) return comment;
-        }
-        return null;
-    }
-
-    public @Nullable String getInlineComment(@NotNull String key, @Nullable String sectionKey) {
-        Map<String, String> pathComment = holder().metadata(key).get(CommentableMeta.INLINE);
-        if (pathComment == null || pathComment.isEmpty()) return null;
-        if (sectionKey == null) return pathComment.get(null);
-
-        for (Map.Entry<String, String> entry : pathComment.entrySet()) {
-            if (entry.getKey().equals(sectionKey)) return entry.getValue();
-            Pattern pattern = Pattern.compile(entry.getKey().replace(".", "\\.").replace("*", ".*"));
-            if (pattern.matcher(sectionKey).matches()) return entry.getValue();
-        }
-        return null;
     }
 
     @Override
     public @Nullable List<String> getHeaderComments(@Nullable String key) {
-        return holder().metadata(key).get(CommentableMeta.HEADER);
+        return Commentable.getHeaderComments(holder(), key);
     }
 
     @Override
     public @Nullable List<String> getFooterComments(@Nullable String key) {
-        return holder().metadata(key).get(CommentableMeta.FOOTER);
+        return Commentable.getFooterComments(holder(), key);
     }
 
     public static class YamlRepresenter extends Representer {

providers/yaml/src/test/java/sample/SampleConfig.java

@@ -2,6 +2,7 @@ package sample;
 
 import cc.carm.lib.configuration.Configuration;
 import cc.carm.lib.configuration.annotation.ConfigPath;
+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.value.standard.ConfiguredList;
@@ -19,6 +20,8 @@ public interface SampleConfig extends Configuration {
     @HeaderComments("Server configurations") // Header comment
     ConfiguredValue<Integer> PORT = ConfiguredValue.of(Integer.class);
 
+    @HeaderComments({"[ UUID >-----------------------------------", "A lot of UUIDs"})
+    @FooterComments("[ UUID >-----------------------------------")
     ConfiguredList<UUID> UUIDS = ConfiguredList.builderOf(UUID.class).fromString()
             .parse(UUID::fromString).serialize(UUID::toString)
             .defaults(

providers/yaml/src/test/java/sample/SampleTest.java

@@ -11,7 +11,7 @@ public class SampleTest {
         // 1. Make a configuration provider from a file.
         ConfigurationHolder<?> holder = YAMLConfigFactory.from("target/config.yml")
                 .resourcePath("configs/sample.yml")
-                .indent(4) // Optional: Set the indentation of the configuration file.
+                .indent(2) // Optional: Set the indentation of the configuration file.
                 .build();
 
         // 2. Initialize the configuration classes or instances.

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

@@ -4,17 +4,19 @@ 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 org.junit.Test;
 
 import java.util.List;
 import java.util.Map;
+import java.util.regex.Pattern;
 
 public class YamlTests {
 
     @Test
     public void test() {
 
-        ConfigurationHolder<?> holder = YAMLConfigFactory.from("target/tests.yml")
+        ConfigurationHolder<YAMLSource> holder = YAMLConfigFactory.from("target/tests.yml")
                 .resourcePath("configs/sample.yml").build();
 
         ConfigurationTest.testDemo(holder);