feat(loader): Refactor loaders and metadata.

features/file/pom.xml

@@ -0,0 +1,50 @@
+<?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-file</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/file/src/main/java/cc/carm/lib/configuration/option/FileConfigOptions.java

@@ -0,0 +1,15 @@
+package cc.carm.lib.configuration.option;
+
+import cc.carm.lib.easyoptions.OptionType;
+
+import static cc.carm.lib.easyoptions.OptionType.of;
+
+public class FileConfigOptions {
+
+    /**
+     * Whether to copy files from resource if exists.
+     */
+    OptionType<Boolean> COPY_DEFAULTS = of(true);
+
+
+}

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

@@ -0,0 +1,87 @@
+//package cc.carm.lib.configuration.core.source.impl;
+//
+//import org.jetbrains.annotations.NotNull;
+//import org.jetbrains.annotations.Nullable;
+//
+//import java.io.File;
+//import java.io.IOException;
+//import java.io.InputStream;
+//import java.io.OutputStream;
+//import java.net.URL;
+//import java.net.URLConnection;
+//import java.nio.file.Files;
+//import java.util.Objects;
+//
+//public abstract class FileConfigProvider<W extends ConfigurationWrapper<?>> extends ConfigurationProvider<W> {
+//
+//    protected final @NotNull File file;
+//
+//    protected FileConfigProvider(@NotNull File file) {
+//        this.file = file;
+//    }
+//
+//    public @NotNull File getFile() {
+//        return file;
+//    }
+//
+//    public void initializeFile(@Nullable String sourcePath) throws IOException {
+//        if (this.file.exists()) return;
+//
+//        File parent = this.file.getParentFile();
+//        if (parent != null && !parent.exists() && !parent.mkdirs()) {
+//            throw new IOException("Failed to create directory " + file.getParentFile().getAbsolutePath());
+//        }
+//
+//        if (!this.file.createNewFile()) {
+//            throw new IOException("Failed to create file " + file.getAbsolutePath());
+//        }
+//
+//        if (sourcePath != null) {
+//            try {
+//                saveResource(sourcePath, true);
+//            } catch (IllegalArgumentException ignored) {
+//            }
+//        }
+//    }
+//
+//    public void saveResource(@NotNull String resourcePath, boolean replace)
+//            throws IOException, IllegalArgumentException {
+//        Objects.requireNonNull(resourcePath, "ResourcePath cannot be null");
+//        if (resourcePath.isEmpty()) throw new IllegalArgumentException("ResourcePath cannot be empty");
+//
+//        resourcePath = resourcePath.replace('\\', '/');
+//
+//        URL url = this.getClass().getClassLoader().getResource(resourcePath);
+//        if (url == null) throw new IllegalArgumentException("The resource '" + resourcePath + "' not exists");
+//
+//        File outDir = file.getParentFile();
+//
+//        if (!outDir.exists() && !outDir.mkdirs()) throw new IOException("Failed to create directory " + outDir);
+//        if (!file.exists() || replace) {
+//            try (OutputStream out = Files.newOutputStream(file.toPath())) {
+//                URLConnection connection = url.openConnection();
+//                connection.setUseCaches(false);
+//                try (InputStream in = connection.getInputStream()) {
+//                    byte[] buf = new byte[1024];
+//                    int len;
+//                    while ((len = in.read(buf)) > 0) {
+//                        out.write(buf, 0, len);
+//                    }
+//                }
+//            }
+//        }
+//    }
+//
+//    @Nullable
+//    public InputStream getResource(@NotNull String filename) {
+//        try {
+//            URL url = this.getClass().getClassLoader().getResource(filename);
+//            if (url == null) return null;
+//            URLConnection connection = url.openConnection();
+//            connection.setUseCaches(false);
+//            return connection.getInputStream();
+//        } catch (IOException ex) {
+//            return null;
+//        }
+//    }
+//}

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

@@ -0,0 +1,6 @@
+package cc.carm.lib.configuration.source;
+
+public class FileConfigSource {
+
+
+}