feat(yaml): Finished YAML Provider

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

@@ -0,0 +1,18 @@
+package cc.carm.lib.configuration.function;
+
+import org.jetbrains.annotations.NotNull;
+
+@FunctionalInterface
+public interface DataConsumer<T> {
+
+    void accept(@NotNull T data) throws Exception;
+
+    default DataConsumer<T> andThen(DataConsumer<? super T> after) {
+        return (T t) -> {
+            accept(t);
+            after.accept(t);
+        };
+    }
+
+
+}

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

@@ -15,6 +15,7 @@ import org.jetbrains.annotations.NotNull;
 import java.lang.annotation.Annotation;
 import java.util.function.Consumer;
 import java.util.function.Function;
+import java.util.function.Supplier;
 
 public abstract class ConfigurationFactory<
         SOURCE extends ConfigureSource<?, ?, SOURCE>,
@@ -31,8 +32,7 @@ public abstract class ConfigurationFactory<
         this.adapters.register(StandardAdapters.SECTION_ADAPTER);
     }
 
-    public abstract SELF self();
+    protected abstract SELF self();
-
 
     public SELF adapters(ValueAdapterRegistry adapters) {
         this.adapters = adapters;
@@ -81,13 +81,25 @@ public abstract class ConfigurationFactory<
         return self();
     }
 
-    public SELF option(Consumer<ConfigurationOptionHolder> optionsConsumer) {
+    public SELF option(Consumer<ConfigurationOptionHolder> modifier) {
-        optionsConsumer.accept(options);
+        modifier.accept(options);
         return self();
     }
 
-    public <O> SELF option(ConfigurationOption<O> option, O value) {
+    public <O> SELF option(ConfigurationOption<O> type, O value) {
-        return option(o -> o.set(option, value));
+        return option(o -> o.set(type, value));
+    }
+
+    public <O> SELF option(ConfigurationOption<O> type, Supplier<O> value) {
+        return option(type, value.get());
+    }
+
+    public <O> SELF option(ConfigurationOption<O> type, Consumer<O> modifier) {
+        return option(holder -> {
+            O current = holder.get(type);
+            modifier.accept(current);
+            holder.set(type, current);
+        });
     }
 
 

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

@@ -67,14 +67,9 @@ public class ConfigurationInitializer {
         this.classInitializer = this.classInitializer.andThen(classInitializer);
     }
 
-    public <T, A extends Annotation> void registerAnnotation(@NotNull Class<A> annotation,
+    public <T, A extends Annotation> void registerClassAnnotation(@NotNull Class<A> annotation,
-                                                             @NotNull ConfigurationMetadata<T> metadata,
+                                                                  @NotNull ConfigurationMetadata<T> metadata,
-                                                             @NotNull Function<A, T> extractor) {
+                                                                  @NotNull Function<A, T> extractor) {
-        appendFieldInitializer((holder, path, field) -> {
-            A data = field.getAnnotation(annotation);
-            if (data == null) return;
-            holder.metadata(path).setIfAbsent(metadata, extractor.apply(data));
-        });
         appendClassInitializer((holder, path, clazz) -> {
             A data = clazz.getAnnotation(annotation);
             if (data == null) return;
@@ -82,6 +77,23 @@ public class ConfigurationInitializer {
         });
     }
 
+    public <T, A extends Annotation> void registerFieldAnnotation(@NotNull Class<A> annotation,
+                                                                  @NotNull ConfigurationMetadata<T> metadata,
+                                                                  @NotNull Function<A, T> extractor) {
+        appendFieldInitializer((holder, path, field) -> {
+            A data = field.getAnnotation(annotation);
+            if (data == null) return;
+            holder.metadata(path).setIfAbsent(metadata, extractor.apply(data));
+        });
+    }
+
+    public <T, A extends Annotation> void registerAnnotation(@NotNull Class<A> annotation,
+                                                             @NotNull ConfigurationMetadata<T> metadata,
+                                                             @NotNull Function<A, T> extractor) {
+        registerClassAnnotation(annotation, metadata, extractor);
+        registerFieldAnnotation(annotation, metadata, extractor);
+    }
+
 
     public @Nullable String getFieldPath(@NotNull ConfigurationHolder<?> holder, @Nullable String parentPath, @NotNull Field field) {
         return pathGenerator.getFieldPath(holder, parentPath, field);

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

@@ -54,13 +54,14 @@ public class PathGenerator {
         ConfigPath clazzPath = clazz.getAnnotation(ConfigPath.class);
         if (clazzPath != null) return link(holder, parentPath, clazzPath.root(), clazzPath.value());
 
-        if (clazzField == null) {
+        if (clazzField != null) {
-            return link(holder, parentPath, false, parentPath == null ? null : covertPath(clazz.getSimpleName())); // No field, use class name.
+            ConfigPath fieldPath = clazzField.getAnnotation(ConfigPath.class);
+            if (fieldPath == null) return link(holder, parentPath, false, covertPath(clazzField.getName()));
+            else return getFieldPath(holder, parentPath, clazzField);
         }
 
-        ConfigPath fieldPath = clazzField.getAnnotation(ConfigPath.class);
+        return link(holder, parentPath, false, covertPath(clazz.getSimpleName())); // No field, use class name.
-        if (fieldPath == null) return link(holder, parentPath, false, covertPath(clazzField.getName()));
+
-        else return getFieldPath(holder, parentPath, clazzField);
     }
 
     protected String select(String path, String defaultValue) {
@@ -71,7 +72,7 @@ public class PathGenerator {
     protected @Nullable String link(@NotNull ConfigurationHolder<?> holder,
                                     @Nullable String parent, boolean root, @Nullable String path) {
         if (path == null || path.isEmpty()) return root ? null : parent;
-        return root || parent == null ? path : parent + pathSeparator(holder) + path;
+        return (root || parent == null) ? path : (parent + pathSeparator(holder) + path);
     }
 
     public static boolean isBlank(String path) {

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

@@ -2,6 +2,8 @@ package cc.carm.lib.configuration.source.option;
 
 import org.jetbrains.annotations.NotNull;
 
+import java.util.function.Supplier;
+
 public class ConfigurationOption<V> {
 
     @SuppressWarnings("unchecked")
@@ -13,6 +15,10 @@ public class ConfigurationOption<V> {
         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;
 

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

@@ -59,6 +59,11 @@ public abstract class ConfigureSource<
         return null; // Source also represents the root section, so it has no parent
     }
 
+    @Override
+    public @NotNull ConfigureSource<?, ?, ?> source() {
+        return self();
+    }
+
     @Override
     public @NotNull Map<String, Object> getValues(boolean deep) {
         return section().getValues(deep);

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

@@ -7,6 +7,32 @@ import org.jetbrains.annotations.Nullable;
 import java.util.Objects;
 import java.util.Optional;
 
+/**
+ * Represents a configurable value with type safety and null-handling capabilities.
+ * <p>
+ * This abstract class provides core functionalities for managing configuration values,
+ * including value retrieval with fallback defaults, null safety enforcement, and value
+ * persistence controls. It serves as the foundation for type-specific configuration
+ * implementations.
+ * </p>
+ *
+ * <h3>Functions:</h3>
+ * <ul>
+ *   <li>Type-safe value access through {@link #get()} and {@link #optional()}</li>
+ *   <li>Default value fallback via {@link #getOrDefault()}</li>
+ *   <li>Null-safety enforcement with {@link #resolve()} and {@link #getNotNull()}</li>
+ *   <li>Default value initialization through {@link #setDefault()}</li>
+ *   <li>Value comparison with {@link #isDefault()}</li>
+ * </ul>
+ *
+ * <h3>Persistence Behavior:</h3>
+ * Value modifications via {@link #set(Object)} or {@link #setDefault()} methods
+ * <b>do NOT automatically persist</b> to configuration sources. Explicit calls to
+ * {@link ConfigurationHolder#save()} are required for permanent storage.
+ *
+ * @see ValueManifest Base class providing metadata and default value handling
+ * @see ConfigurationHolder Responsible for configuration source persistence
+ */
 public abstract class ConfigValue<T> extends ValueManifest<T> {
 
     protected ConfigValue(@NotNull ValueManifest<T> manifest) {
@@ -14,57 +40,77 @@ public abstract class ConfigValue<T> extends ValueManifest<T> {
     }
 
     /**
-     * 得到该配置的设定值(即读取到的值)。
+     * Gets the configured value (i.e., the value read from the source).
-     * <br> 若初始化时未写入默认值，则可以通过 {@link #getOrDefault()} 方法在该设定值为空时获取默认值。
+     * <br> If no default value was written during initialization, you can use
+     * the {@link #getOrDefault()} method to obtain the default value when this value is empty.
      *
-     * @return 设定值
+     * @return Configured value
      */
     public abstract @Nullable T get();
 
     /**
-     * 得到该配置的设定值，若不存在，则返回默认值。
+     * Gets the configured value, or returns the default value if not present.
      *
-     * @return 设定值或默认值
+     * @return Configured value or default value
      */
     public T getOrDefault() {
         return optional().orElse(defaults());
     }
 
     /**
-     * 得到该配置的非空值。
+     * Gets the non-null value of this configuration.
      *
-     * @return 非空值
+     * @return Non-null value
-     * @throws NullPointerException 对应数据为空时抛出
+     * @throws NullPointerException Thrown when the corresponding data is null
      */
-    public @NotNull T getNotNull() {
+    public @NotNull T resolve() {
         return Objects.requireNonNull(getOrDefault(), "Value(" + type() + ") @[" + path() + "] is null.");
     }
 
+    /**
+     * Gets the non-null value of this configuration.
+     *
+     * @return Non-null value
+     * @throws NullPointerException Thrown when the corresponding data is null
+     * @see #resolve()
+     */
+    public @NotNull T getNotNull() {
+        return resolve();
+    }
+
+    /**
+     * Gets the value of this configuration as an {@link Optional}.
+     *
+     * @return {@link Optional} value
+     */
     public @NotNull Optional<@Nullable T> optional() {
         return Optional.ofNullable(get());
     }
 
     /**
-     * 设定该配置的值。
+     * Sets the value of this configuration.
-     * <br> 设定后，不会自动保存配置文件；若需要保存，请调用 {@link ConfigurationHolder#save()} 方法。
+     * <br> After setting, the configuration file will NOT be saved automatically.
+     * To save, call {@link ConfigurationHolder#save()}.
      *
-     * @param value 配置的值
+     * @param value The value to set
      */
     public abstract void set(@Nullable T value);
 
     /**
-     * 初始化该配置的默认值。
+     * Initializes the default value for this configuration.
-     * <br> 设定后，不会自动保存配置文件；若需要保存，请调用 {@link ConfigurationHolder#save()} 方法。
+     * <br> After setting, the configuration file will NOT be saved automatically.
+     * To save, call {@link ConfigurationHolder#save()}.
      */
     public void setDefault() {
         setDefault(false);
     }
 
     /**
-     * 将该配置的值设置为默认值。
+     * Sets the configuration value to its default.
-     * <br> 设定后，不会自动保存配置文件；若需要保存，请调用 {@link ConfigurationHolder#save()} 方法。
+     * <br> After setting, the configuration file will NOT be saved automatically.
+     * To save, call {@link ConfigurationHolder#save()}.
      *
-     * @param override 是否覆盖已设定的值
+     * @param override Whether to overwrite existing configured value
      */
     public void setDefault(boolean override) {
         if (!override && config().contains(path())) return;
@@ -72,9 +118,9 @@ public abstract class ConfigValue<T> extends ValueManifest<T> {
     }
 
     /**
-     * 判断加载的配置是否与默认值相同。
+     * Checks if the loaded configuration value matches the default value.
      *
-     * @return 获取当前值是否为默认值。
+     * @return Whether the current value is the default value
      */
     public boolean isDefault() {
         return Objects.equals(defaults(), get());
@@ -86,7 +132,7 @@ public abstract class ConfigValue<T> extends ValueManifest<T> {
      * it is recommended to call {@link ConfigurationHolder#save()}
      * after all modifications are completed instead of this.
      *
-     * @throws Exception
+     * @throws Exception Thrown when an error occurs during saving
      */
     public void save() throws Exception {
         holder().save();

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

@@ -111,22 +111,22 @@ public class ConfiguredList<V> extends CachedConfigValue<List<V>> implements Lis
 
     @Override
     public V get(int index) {
-        return getNotNull().get(index);
+        return resolve().get(index);
     }
 
     public @NotNull List<V> copy() {
-        return new ArrayList<>(getNotNull());
+        return new ArrayList<>(resolve());
     }
 
     public <T> @NotNull T handle(Function<List<V>, T> function) {
-        List<V> list = getNotNull();
+        List<V> list = resolve();
         T result = function.apply(list);
         set(list);
         return result;
     }
 
     public @NotNull ConfiguredList<V> modify(Consumer<List<V>> consumer) {
-        List<V> list = getNotNull();
+        List<V> list = resolve();
         consumer.accept(list);
         set(list);
         return this;
@@ -139,40 +139,40 @@ public class ConfiguredList<V> extends CachedConfigValue<List<V>> implements Lis
 
     @Override
     public int size() {
-        return getNotNull().size();
+        return resolve().size();
     }
 
     @Override
     public boolean isEmpty() {
-        return getNotNull().isEmpty();
+        return resolve().isEmpty();
     }
 
     @Override
     public boolean contains(Object o) {
-        return getNotNull().contains(o);
+        return resolve().contains(o);
     }
 
     @NotNull
     @Override
     public Iterator<V> iterator() {
-        return getNotNull().iterator();
+        return resolve().iterator();
     }
 
     @NotNull
     @Override
     public Object @NotNull [] toArray() {
-        return getNotNull().toArray();
+        return resolve().toArray();
     }
 
     @NotNull
     @Override
     public <T> T @NotNull [] toArray(@NotNull T[] a) {
-        return getNotNull().toArray(a);
+        return resolve().toArray(a);
     }
 
     @Override
     public boolean containsAll(@NotNull Collection<?> c) {
-        return new HashSet<>(getNotNull()).containsAll(c);
+        return new HashSet<>(resolve()).containsAll(c);
     }
 
     @Override
@@ -223,30 +223,30 @@ public class ConfiguredList<V> extends CachedConfigValue<List<V>> implements Lis
 
     @Override
     public int indexOf(Object o) {
-        return getNotNull().indexOf(o);
+        return resolve().indexOf(o);
     }
 
     @Override
     public int lastIndexOf(Object o) {
-        return getNotNull().lastIndexOf(o);
+        return resolve().lastIndexOf(o);
     }
 
     @NotNull
     @Override
     public ListIterator<V> listIterator() {
-        return getNotNull().listIterator();
+        return resolve().listIterator();
     }
 
     @NotNull
     @Override
     public ListIterator<V> listIterator(int index) {
-        return getNotNull().listIterator(index);
+        return resolve().listIterator(index);
     }
 
     @NotNull
     @Override
     public List<V> subList(int fromIndex, int toIndex) {
-        return getNotNull().subList(fromIndex, toIndex);
+        return resolve().subList(fromIndex, toIndex);
     }
 
 }

core/src/test/java/AdaptTest.java

@@ -1,57 +0,0 @@
-import cc.carm.lib.configuration.adapter.ValueAdapterRegistry;
-import cc.carm.lib.configuration.adapter.ValueType;
-import cc.carm.lib.configuration.adapter.strandard.PrimitiveAdapter;
-import cc.carm.lib.configuration.source.ConfigurationHolder;
-import cc.carm.lib.configuration.source.loader.ConfigurationInitializer;
-import cc.carm.lib.configuration.source.option.ConfigurationOptionHolder;
-import cc.carm.test.config.TestSource;
-import org.jetbrains.annotations.NotNull;
-import org.junit.Test;
-
-import java.time.Duration;
-import java.time.LocalTime;
-import java.util.concurrent.ConcurrentHashMap;
-
-public class AdaptTest {
-
-    @Test
-    public void test() throws Exception {
-
-        ValueAdapterRegistry registry = new ValueAdapterRegistry();
-        registry.register(PrimitiveAdapter.ADAPTERS);
-        registry.register(PrimitiveAdapter.ofEnum());
-
-
-        registry.register(ValueType.of(Long.class), ValueType.of(Duration.class), Duration::ofMillis, Duration::toMillis);
-        registry.register(
-                ValueType.of(Duration.class), ValueType.of(LocalTime.class),
-                duration -> LocalTime.now().plus(duration),
-                data -> Duration.between(LocalTime.now(), data)
-        );
-
-        ConfigurationHolder<TestSource> provider = new ConfigurationHolder<TestSource>(
-                registry, new ConfigurationOptionHolder(),
-                new ConcurrentHashMap<>(), new ConfigurationInitializer()
-        ) {
-            final TestSource source = new TestSource(this, System.currentTimeMillis());
-
-            @Override
-            public @NotNull TestSource config() {
-                return source;
-            }
-        };
-
-        LocalTime v = registry.deserialize(provider, LocalTime.class, 600000L);
-        Object d = registry.serialize(provider, v);
-
-        System.out.println(v);
-        System.out.println(d);
-        System.out.println(registry.deserialize(provider, TestEnum.class, "C"));
-        System.out.println(registry.serialize(provider, TestEnum.C).getClass());
-    }
-
-    enum TestEnum {
-        A, b, C
-    }
-
-}

core/src/test/java/cc/carm/test/config/LoaderTest.java

@@ -1,55 +0,0 @@
-package cc.carm.test.config;
-
-import cc.carm.lib.configuration.adapter.ValueAdapterRegistry;
-import cc.carm.lib.configuration.annotation.ConfigPath;
-import cc.carm.lib.configuration.Configuration;
-import cc.carm.lib.configuration.source.ConfigurationHolder;
-import cc.carm.lib.configuration.source.loader.ConfigurationInitializer;
-import cc.carm.lib.configuration.source.option.ConfigurationOptionHolder;
-import org.jetbrains.annotations.NotNull;
-import org.junit.Test;
-
-import java.util.concurrent.ConcurrentHashMap;
-
-public class LoaderTest {
-
-    @Test
-    public void test() throws Exception {
-        ConfigurationHolder<TestSource> provider = new ConfigurationHolder<TestSource>(
-                new ValueAdapterRegistry(), new ConfigurationOptionHolder(),
-                new ConcurrentHashMap<>(), new ConfigurationInitializer()
-        ) {
-            final TestSource source = new TestSource(this, System.currentTimeMillis());
-
-            @Override
-            public @NotNull TestSource config() {
-                return source;
-            }
-        };
-
-        ConfigurationInitializer loader = new ConfigurationInitializer();
-        loader.initialize(provider, ROOT.class);
-    }
-
-    interface ROOT extends Configuration {
-
-        interface SUB extends Configuration {
-
-
-        }
-
-
-        @ConfigPath(root = true)
-        interface EXTERNAL extends Configuration {
-
-
-        }
-
-        @ConfigPath("NO")
-        interface YES extends Configuration {
-
-
-        }
-
-    }
-}

core/src/test/java/cc/carm/test/config/TestSection.java

@@ -1,57 +0,0 @@
-package cc.carm.test.config;
-
-import cc.carm.lib.configuration.source.section.ConfigureSection;
-import cc.carm.lib.configuration.source.section.ConfigureSource;
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
-
-import java.util.Collections;
-import java.util.List;
-import java.util.Map;
-
-public class TestSection implements ConfigureSection {
-    @Override
-    public @NotNull ConfigureSource<?, ?, ?> source() {
-        return null;
-    }
-
-    @Override
-    public @NotNull Map<String, Object> getValues(boolean deep) {
-        return Collections.emptyMap();
-    }
-
-    @Override
-    public void set(@NotNull String path, @Nullable Object value) {
-
-    }
-
-    @Override
-    public boolean contains(@NotNull String path) {
-        return false;
-    }
-
-    @Override
-    public boolean isList(@NotNull String path) {
-        return false;
-    }
-
-    @Override
-    public @Nullable List<?> getList(@NotNull String path) {
-        return Collections.emptyList();
-    }
-
-    @Override
-    public boolean isSection(@NotNull String path) {
-        return false;
-    }
-
-    @Override
-    public @Nullable ConfigureSection getSection(@NotNull String path) {
-        return null;
-    }
-
-    @Override
-    public @Nullable Object get(@NotNull String path) {
-        return null;
-    }
-}

core/src/test/java/cc/carm/test/config/TestSource.java

@@ -1,45 +0,0 @@
-package cc.carm.test.config;
-
-import cc.carm.lib.configuration.source.ConfigurationHolder;
-import cc.carm.lib.configuration.source.section.ConfigureSource;
-import org.jetbrains.annotations.NotNull;
-
-import java.util.Map;
-
-public class TestSource extends ConfigureSource<TestSection, Map<String, String>, TestSource> {
-
-
-    public TestSource(@NotNull ConfigurationHolder<? extends TestSource> holder, long lastUpdateMillis) {
-        super(holder, lastUpdateMillis);
-    }
-
-    @Override
-    protected TestSource self() {
-        return this;
-    }
-
-    @Override
-    public void save() throws Exception {
-
-    }
-
-    @Override
-    protected void onReload() throws Exception {
-
-    }
-
-    @Override
-    public @NotNull Map<String, String> original() {
-        return null;
-    }
-
-    @Override
-    public @NotNull TestSection section() {
-        return null;
-    }
-
-    @Override
-    public @NotNull ConfigureSource<?, ?, ?> source() {
-        return null;
-    }
-}

demo/src/main/java/cc/carm/lib/configuration/demo/tests/ConfigurationTest.java

@@ -69,14 +69,14 @@ public class ConfigurationTest {
         provider.initialize(TEST);
 
         System.out.println("> Test Inner value before:");
-        System.out.println(TEST.INSTANCE.INNER_VALUE.getNotNull());
+        System.out.println(TEST.INSTANCE.INNER_VALUE.resolve());
 
         double after = Math.random() * 200D;
         System.out.println("> Test Inner value -> " + after);
         TEST.INSTANCE.INNER_VALUE.set(after);
 
         System.out.println("> Test Inner value after:");
-        System.out.println(TEST.INSTANCE.INNER_VALUE.getNotNull());
+        System.out.println(TEST.INSTANCE.INNER_VALUE.resolve());
 
     }
 

features/file/src/main/java/cc/carm/lib/configuration/source/file/FileConfigSource.java

@@ -1,5 +1,6 @@
 package cc.carm.lib.configuration.source.file;
 
+import cc.carm.lib.configuration.function.DataConsumer;
 import cc.carm.lib.configuration.function.DataFunction;
 import cc.carm.lib.configuration.source.ConfigurationHolder;
 import cc.carm.lib.configuration.source.option.FileConfigOptions;
@@ -14,7 +15,6 @@ import java.net.URLConnection;
 import java.nio.charset.Charset;
 import java.nio.file.Files;
 import java.util.Objects;
-import java.util.function.Consumer;
 
 public abstract class FileConfigSource<SECTION extends ConfigureSection, ORIGINAL, SELF extends FileConfigSource<SECTION, ORIGINAL, SELF>>
         extends ConfigureSource<SECTION, ORIGINAL, SELF> {
@@ -38,7 +38,6 @@ public abstract class FileConfigSource<SECTION extends ConfigureSection, ORIGINA
         return holder().options().get(FileConfigOptions.COPY_DEFAULTS);
     }
 
-
     public void initializeFile() throws IOException {
         if (this.file.exists()) return;
 
@@ -74,13 +73,41 @@ public abstract class FileConfigSource<SECTION extends ConfigureSection, ORIGINA
         }
     }
 
-    protected void fileOutputStream(@NotNull Consumer<OutputStream> stream) throws Exception {
+    protected <R> R fileReadString(@NotNull DataFunction<String, R> loader) throws Exception {
+        try (InputStream is = Files.newInputStream(file.toPath())) {
+            try (Reader r = new InputStreamReader(is, charset())) {
+                StringBuilder sb = new StringBuilder();
+                char[] buf = new char[1024];
+                int len;
+                while ((len = r.read(buf)) > 0) {
+                    sb.append(buf, 0, len);
+                }
+                return loader.handle(sb.toString());
+            }
+        }
+    }
+
+    protected void fileReadString(@NotNull DataConsumer<String> loader) throws Exception {
+        try (InputStream is = Files.newInputStream(file.toPath())) {
+            try (Reader r = new InputStreamReader(is, charset())) {
+                StringBuilder sb = new StringBuilder();
+                char[] buf = new char[1024];
+                int len;
+                while ((len = r.read(buf)) > 0) {
+                    sb.append(buf, 0, len);
+                }
+                loader.accept(sb.toString());
+            }
+        }
+    }
+
+    protected void fileOutputStream(@NotNull DataConsumer<OutputStream> stream) throws Exception {
         try (OutputStream os = Files.newOutputStream(file.toPath())) {
             stream.accept(os);
         }
     }
 
-    protected void fileWriter(@NotNull Consumer<Writer> writer) throws Exception {
+    protected void fileWriter(@NotNull DataConsumer<Writer> writer) throws Exception {
         try (OutputStream os = Files.newOutputStream(file.toPath())) {
             try (Writer w = new OutputStreamWriter(os, charset())) {
                 writer.accept(w);

features/section/pom.xml

@@ -0,0 +1,51 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <groupId>cc.carm.lib</groupId>
+        <artifactId>easyconfiguration-parent</artifactId>
+        <version>3.9.1</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-section</artifactId>
+    <packaging>jar</packaging>
+
+    <dependencies>
+        <dependency>
+            <groupId>${project.groupId}</groupId>
+            <artifactId>easyconfiguration-core</artifactId>
+            <version>${project.version}</version>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-source-plugin</artifactId>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-javadoc-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+</project>

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

@@ -1,34 +1,39 @@
-package cc.carm.lib.configuration.source.json;
+package cc.carm.lib.configuration.source.section;
 
-import cc.carm.lib.configuration.source.section.ConfigureSection;
-import cc.carm.lib.configuration.source.section.ConfigureSource;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
 import java.util.*;
 
-public class JSONSection implements ConfigureSection {
+public class MemorySection implements ConfigureSection {
 
-    protected final @NotNull ConfigureSource<? extends JSONSection, ?, ?> source;
+    public static @NotNull MemorySection root(@NotNull ConfigureSource<? extends MemorySection, ?, ?> source) {
+        return new MemorySection(source, new LinkedHashMap<>(), null);
+    }
+
+    public static @NotNull MemorySection root(@NotNull ConfigureSource<? extends MemorySection, ?, ?> source,
+                                              @Nullable Map<?, ?> data) {
+        return new MemorySection(source, data == null ? new LinkedHashMap<>() : data, null);
+    }
+
+    protected final @NotNull ConfigureSource<? extends MemorySection, ?, ?> source;
     protected final @NotNull Map<String, Object> data;
-    protected final @Nullable JSONSection parent;
+    protected final @Nullable MemorySection parent;
 
-    public JSONSection(@NotNull ConfigureSource<? extends JSONSection, ?, ?> source,
+    public MemorySection(@NotNull ConfigureSource<? extends MemorySection, ?, ?> source,
-                       @NotNull Map<?, ?> data, @Nullable JSONSection parent) {
+                         @NotNull Map<?, ?> data, @Nullable MemorySection parent) {
         this.source = source;
         this.parent = parent;
         this.data = new LinkedHashMap<>();
-
         for (Map.Entry<?, ?> entry : data.entrySet()) {
             String key = (entry.getKey() == null) ? "null" : entry.getKey().toString();
-
             if (entry.getValue() instanceof Map) {
-                this.data.put(key, new JSONSection(source, (Map<?, ?>) entry.getValue(), this));
+                this.data.put(key, createChild((Map<?, ?>) entry.getValue()));
             } else if (entry.getValue() instanceof List) {
                 List<Object> list = new ArrayList<>();
                 for (Object obj : (List<?>) entry.getValue()) {
                     if (obj instanceof Map) {
-                        list.add(new JSONSection(source, (Map<?, ?>) obj, this));
+                        list.add(createChild((Map<?, ?>) obj));
                     } else {
                         list.add(obj);
                     }
@@ -40,8 +45,16 @@ public class JSONSection implements ConfigureSection {
         }
     }
 
+    protected @NotNull MemorySection createChild(@NotNull Map<?, ?> data) {
+        return new MemorySection(source(), data, this);
+    }
+
+    protected @NotNull MemorySection createChild() {
+        return createChild(new LinkedHashMap<>());
+    }
+
     @Override
-    public @NotNull ConfigureSource<? extends JSONSection, ?, ?> source() {
+    public @NotNull ConfigureSource<? extends MemorySection, ?, ?> source() {
         return this.source;
     }
 
@@ -49,7 +62,7 @@ public class JSONSection implements ConfigureSection {
         return this.data;
     }
 
-    public @Nullable JSONSection parent() {
+    public @Nullable MemorySection parent() {
         return this.parent;
     }
 
@@ -64,11 +77,9 @@ public class JSONSection implements ConfigureSection {
 
     @Override
     public void set(@NotNull String path, @Nullable Object value) {
-        if (value instanceof Map) {
+        if (value instanceof Map) value = createChild((Map<?, ?>) value);
-            value = new JSONSection(source(), (Map<?, ?>) value, this);
-        }
 
-        JSONSection section = getSectionFor(path);
+        MemorySection section = getSectionFor(path);
         if (section == this) {
             if (value == null) {
                 this.data.remove(path);
@@ -87,7 +98,7 @@ public class JSONSection implements ConfigureSection {
 
     @Override
     public @Nullable Object get(@NotNull String path) {
-        JSONSection section = getSectionFor(path);
+        MemorySection section = getSectionFor(path);
         return section == this ? data.get(path) : section.get(getChild(path));
     }
 
@@ -104,7 +115,7 @@ public class JSONSection implements ConfigureSection {
 
     @Override
     public boolean isSection(@NotNull String path) {
-        return get(path) instanceof JSONSection;
+        return get(path) instanceof ConfigureSection;
     }
 
     @Override
@@ -113,18 +124,18 @@ public class JSONSection implements ConfigureSection {
         return (val instanceof ConfigureSection) ? (ConfigureSection) val : null;
     }
 
-    private JSONSection getSectionFor(String path) {
+    private MemorySection getSectionFor(String path) {
         int index = path.indexOf(separator());
         if (index == -1) return this;
 
         String root = path.substring(0, index);
         Object section = this.data.get(root);
         if (section == null) {
-            section = new JSONSection(source(), new LinkedHashMap<>(), this);
+            section = createChild();
             this.data.put(root, section);
         }
 
-        return (JSONSection) section;
+        return (MemorySection) section;
     }
 
     private String getChild(String path) {
@@ -140,16 +151,15 @@ public class JSONSection implements ConfigureSection {
      * @param section The section to map the values from
      * @param parent  The parent path
      * @param deep    If the mapping should be deep
-     * @author md_5, sk89q
      */
-    protected void mapChildrenValues(@NotNull Map<String, Object> output, @NotNull JSONSection section,
+    protected void mapChildrenValues(@NotNull Map<String, Object> output, @NotNull MemorySection section,
                                      @Nullable String parent, boolean deep) {
         for (Map.Entry<String, Object> entry : section.data().entrySet()) {
             String path = (parent == null ? "" : parent + separator()) + entry.getKey();
             output.remove(path);
             output.put(path, entry.getValue());
-            if (deep && entry.getValue() instanceof JSONSection) {
+            if (deep && entry.getValue() instanceof MemorySection) {
-                this.mapChildrenValues(output, (JSONSection) entry.getValue(), path, true);
+                this.mapChildrenValues(output, (MemorySection) entry.getValue(), path, true);
             }
         }
     }

features/versioned/src/main/java/cc/carm/lib/configuration/commentable/VersionedMetaTypes.java

@@ -19,7 +19,7 @@ public interface VersionedMetaTypes {
     }
 
     static void register(@NotNull ConfigurationInitializer initializer) {
-        initializer.registerAnnotation(ConfigVersion.class, VERSION, ConfigVersion::value);
+        initializer.registerFieldAnnotation(ConfigVersion.class, VERSION, ConfigVersion::value);
     }
 
 }

pom.xml

@@ -18,8 +18,9 @@
     <version>3.9.1</version>
     <modules>
         <module>core</module>
-        <module>features/commentable</module>
+        <module>features/section</module>
         <module>features/file</module>
+        <module>features/commentable</module>
         <module>features/versioned</module>
 
         <module>providers/yaml</module>

providers/gson/pom.xml

@@ -34,6 +34,13 @@
             <scope>compile</scope>
         </dependency>
 
+        <dependency>
+            <groupId>${project.parent.groupId}</groupId>
+            <artifactId>easyconfiguration-feature-section</artifactId>
+            <version>${project.parent.version}</version>
+            <scope>compile</scope>
+        </dependency>
+
         <dependency>
             <groupId>${project.parent.groupId}</groupId>
             <artifactId>easyconfiguration-demo</artifactId>

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

@@ -28,7 +28,7 @@ public class JSONConfigFactory extends FileConfigFactory<JSONSource, Configurati
     }
 
     @Override
-    public JSONConfigFactory self() {
+    protected JSONConfigFactory self() {
         return this;
     }
 
@@ -37,10 +37,6 @@ public class JSONConfigFactory extends FileConfigFactory<JSONSource, Configurati
         return self();
     }
 
-    public JSONConfigFactory gson(@NotNull Gson gson) {
-        return gson(() -> gson);
-    }
-
     public JSONConfigFactory gson(@NotNull Consumer<GsonBuilder> builder) {
         return gson(() -> {
             GsonBuilder gsonBuilder = new GsonBuilder();
@@ -49,6 +45,9 @@ public class JSONConfigFactory extends FileConfigFactory<JSONSource, Configurati
         });
     }
 
+    public JSONConfigFactory gson(@NotNull Gson gson) {
+        return gson(() -> gson);
+    }
 
     @Override
     public @NotNull ConfigurationHolder<JSONSource> build() {
@@ -59,7 +58,7 @@ public class JSONConfigFactory extends FileConfigFactory<JSONSource, Configurati
         String sourcePath = this.resourcePath;
 
         return new ConfigurationHolder<JSONSource>(this.adapters, this.options, new ConcurrentHashMap<>(), this.initializer) {
-            final JSONSource source = new JSONSource(this, 0, configFile, sourcePath, gson);
+            final JSONSource source = new JSONSource(this, configFile, sourcePath, gson);
 
             @Override
             public @NotNull JSONSource config() {

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

@@ -2,36 +2,38 @@ package cc.carm.lib.configuration.source.json;
 
 import cc.carm.lib.configuration.source.ConfigurationHolder;
 import cc.carm.lib.configuration.source.file.FileConfigSource;
-import cc.carm.lib.configuration.source.section.ConfigureSource;
+import cc.carm.lib.configuration.source.section.MemorySection;
 import com.google.gson.Gson;
 import com.google.gson.GsonBuilder;
 import com.google.gson.JsonSerializer;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
 
-import java.io.*;
+import java.io.File;
-import java.util.*;
+import java.util.LinkedHashMap;
+import java.util.Map;
+import java.util.Objects;
 
-public class JSONSource extends FileConfigSource<JSONSection, Map<?, ?>, JSONSource> {
+public class JSONSource extends FileConfigSource<MemorySection, Map<?, ?>, JSONSource> {
 
     public static final @NotNull Gson DEFAULT_GSON = new GsonBuilder()
             .serializeNulls().disableHtmlEscaping().setPrettyPrinting()
             .registerTypeAdapter(
-                    JSONSection.class,
+                    MemorySection.class,
-                    (JsonSerializer<JSONSection>) (src, typeOfSrc, context) -> context.serialize(src.data)
+                    (JsonSerializer<MemorySection>) (src, t, c) -> c.serialize(src.data())
             ).create();
 
     protected final @NotNull Gson gson;
-    protected @Nullable JSONSection rootSection;
+    protected @Nullable MemorySection rootSection;
 
-    protected JSONSource(@NotNull ConfigurationHolder<? extends JSONSource> holder, long lastUpdateMillis,
+    protected JSONSource(@NotNull ConfigurationHolder<? extends JSONSource> holder,
                          @NotNull File file, @Nullable String resourcePath) {
-        this(holder, lastUpdateMillis, file, resourcePath, DEFAULT_GSON);
+        this(holder, file, resourcePath, DEFAULT_GSON);
     }
 
-    protected JSONSource(@NotNull ConfigurationHolder<? extends JSONSource> holder, long lastUpdateMillis,
+    protected JSONSource(@NotNull ConfigurationHolder<? extends JSONSource> holder,
                          @NotNull File file, @Nullable String resourcePath, @NotNull Gson gson) {
-        super(holder, lastUpdateMillis, file, resourcePath);
+        super(holder, 0, file, resourcePath);
         this.gson = gson;
         initialize();
     }
@@ -50,19 +52,14 @@ public class JSONSource extends FileConfigSource<JSONSection, Map<?, ?>, JSONSou
         return this;
     }
 
-    @Override
-    public @NotNull ConfigureSource<?, ?, ?> source() {
-        return this;
-    }
-
     @Override
     public @NotNull Map<?, ?> original() {
         return section().data();
     }
 
     @Override
-    public @NotNull JSONSection section() {
+    public @NotNull MemorySection section() {
-        return Objects.requireNonNull(this.rootSection, "Section is not initialized");
+        return Objects.requireNonNull(this.rootSection, "Root section is not initialized");
     }
 
     @Override
@@ -70,11 +67,15 @@ public class JSONSource extends FileConfigSource<JSONSection, Map<?, ?>, JSONSou
         fileWriter(writer -> gson.toJson(original(), writer));
     }
 
+    public @NotNull String saveToString() {
+        return gson.toJson(original());
+    }
+
     @Override
     protected void onReload() throws Exception {
-        Map<?, ?> data = fileReader(reader -> gson.fromJson(reader, LinkedHashMap.class));
+        this.rootSection = MemorySection.root(
-        if (data == null) data = new LinkedHashMap<>();
+                this, fileReader(reader -> gson.fromJson(reader, LinkedHashMap.class))
-        this.rootSection = new JSONSection(this, data, null);
+        );
         this.lastUpdateMillis = System.currentTimeMillis(); // 更新时间
     }
 }

providers/yaml/pom.xml

@@ -42,6 +42,20 @@
             <scope>compile</scope>
         </dependency>
 
+        <dependency>
+            <groupId>${project.parent.groupId}</groupId>
+            <artifactId>easyconfiguration-feature-section</artifactId>
+            <version>${project.parent.version}</version>
+            <scope>compile</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>${project.parent.groupId}</groupId>
+            <artifactId>easyconfiguration-feature-commentable</artifactId>
+            <version>${project.parent.version}</version>
+            <scope>compile</scope>
+        </dependency>
+
         <dependency>
             <groupId>org.yaml</groupId>
             <artifactId>snakeyaml</artifactId>

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

@@ -1,76 +0,0 @@
-package cc.carm.lib.configuration.source.yaml;
-
-import cc.carm.lib.configuration.source.section.ConfigureSection;
-import cc.carm.lib.configuration.source.section.ConfigureSource;
-import org.jetbrains.annotations.NotNull;
-import org.jetbrains.annotations.Nullable;
-import org.jetbrains.annotations.UnmodifiableView;
-
-import java.util.Collections;
-import java.util.List;
-import java.util.Map;
-
-public class YAMLSection implements ConfigureSection {
-
-    protected final @NotNull ConfigureSource<? extends YAMLSection, ?, ?> source;
-    protected final @NotNull Map<String, Object> data;
-    protected final @Nullable YAMLSection parent;
-
-    public YAMLSection(@NotNull ConfigureSource<? extends YAMLSection, ?, ?> source,
-                       @NotNull Map<String, Object> data, @Nullable YAMLSection parent) {
-        this.source = source;
-        this.data = data;
-        this.parent = parent;
-    }
-
-
-    @Override
-    public @NotNull ConfigureSource<?, ?, ?> source() {
-        return this.source;
-    }
-
-    @Override
-    public @Nullable YAMLSection parent() {
-        return this.parent;
-    }
-
-    @Override
-    public @NotNull @UnmodifiableView Map<String, Object> getValues(boolean deep) {
-        return Collections.emptyMap();
-    }
-
-    @Override
-    public void set(@NotNull String path, @Nullable Object value) {
-
-    }
-
-    @Override
-    public boolean contains(@NotNull String path) {
-        return false;
-    }
-
-    @Override
-    public boolean isList(@NotNull String path) {
-        return false;
-    }
-
-    @Override
-    public @Nullable List<?> getList(@NotNull String path) {
-        return Collections.emptyList();
-    }
-
-    @Override
-    public boolean isSection(@NotNull String path) {
-        return false;
-    }
-
-    @Override
-    public @Nullable YAMLSection getSection(@NotNull String path) {
-        return null;
-    }
-
-    @Override
-    public @Nullable Object get(@NotNull String path) {
-        return null;
-    }
-}

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

@@ -1,15 +0,0 @@
-package sample;
-
-public class Sample {
-
-    public static void main(String[] args) {
-        // 1. Make a configuration provider from a file.
-        ConfigurationProvider<?> provider = EasyConfiguration.from("config.yml");
-        // 2. Initialize the configuration classes or instances.
-        provider.initialize(SampleConfig.class);
-        // 3. Enjoy using the configuration!
-        SampleConfig.ENABLED.set(false);
-        System.out.println("Your name is " + SampleConfig.INFO.NAME.getNotNull() + " !");
-    }
-
-}

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

@@ -1,6 +1,6 @@
 package sample;
 
-import cc.carm.lib.configuration.source.Configuration;
+import cc.carm.lib.configuration.Configuration;
 import cc.carm.lib.configuration.annotation.ConfigPath;
 import cc.carm.lib.configuration.annotation.HeaderComment;
 import cc.carm.lib.configuration.annotation.InlineComment;
@@ -9,6 +9,7 @@ import cc.carm.lib.configuration.value.standard.ConfiguredValue;
 
 import java.util.UUID;
 
+@ConfigPath(root = true)
 @HeaderComment("Configurations for sample")
 public interface SampleConfig extends Configuration {
 
@@ -16,12 +17,13 @@ public interface SampleConfig extends Configuration {
     ConfiguredValue<Boolean> ENABLED = ConfiguredValue.of(true);
 
     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

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

@@ -0,0 +1,24 @@
+package sample;
+
+import cc.carm.lib.configuration.source.ConfigurationHolder;
+import cc.carm.lib.configuration.source.yaml.YAMLConfigFactory;
+import org.junit.Test;
+
+public class SampleTest {
+
+    @Test
+    public void test() {
+        // 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.
+                .build();
+
+        // 2. Initialize the configuration classes or instances.
+        holder.initialize(SampleConfig.class);
+        // 3. Enjoy using the configuration!
+        SampleConfig.ENABLED.set(false);
+        System.out.println("Your name is " + SampleConfig.INFO.NAME.resolve() + " (age=" + SampleConfig.INFO.AGE.resolve() + ")!");
+    }
+
+}