106 lines
3.3 KiB
Java
106 lines
3.3 KiB
Java
package xyz.etztech.core.maven;
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import org.bukkit.plugin.java.JavaPlugin;
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import java.io.File;
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import java.io.InputStream;
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import java.lang.reflect.Method;
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import java.net.URL;
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import java.net.URLClassLoader;
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import java.nio.file.Files;
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import java.util.logging.Logger;
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/**
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* A class to load any plugins with MavenLibrary annotations
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*/
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public final class MavenLoader {
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static final String MAVEN_REPOSITORY = "http://repo.maven.apache.org/maven2/";
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private static final Method ADD_URL;
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private static JavaPlugin plugin;
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private static Logger log;
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static {
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try {
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ADD_URL = URLClassLoader.class.getDeclaredMethod("addURL", URL.class);
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ADD_URL.setAccessible(true);
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} catch (NoSuchMethodException e) {
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throw new RuntimeException(e);
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}
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}
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/**
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* The bread and butter. This method loads all dependencies into the Java path
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* @param clazz The class to scan for MavenLibrary annotations
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*/
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public static void loadAll(Class<?> clazz) {
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plugin = JavaPlugin.getProvidingPlugin(clazz);
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log = plugin.getLogger();
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MavenLibrary[] libs = clazz.getDeclaredAnnotationsByType(MavenLibrary.class);
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if (libs == null) {
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return;
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}
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for (MavenLibrary lib : libs) {
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load(lib.group(), lib.artifact(), lib.version(), lib.repository());
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}
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}
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private static void load(String group, String artifact, String version, String repository) {
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log.info(String.format("Loading dependency %s:%s:%s", group, artifact, version));
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String name = artifact + "-" + version;
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File jarFile = new File(getLibraryFolder(), name + ".jar");
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if (!jarFile.exists()) {
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try {
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log.info(String.format("Dependency '%s' was not found. Attempting to download from %s...",
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name, repository));
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URL url = getURL(group, artifact, version, repository);
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try (InputStream in = url.openStream()) {
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Files.copy(in, jarFile.toPath());
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}
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} catch (Exception e) {
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e.printStackTrace();
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}
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log.info("Dependency '" + name + "' downloaded successfully.");
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}
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if (!jarFile.exists()) {
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throw new RuntimeException("Dependency does not exist: " + name);
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}
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URLClassLoader classLoader = (URLClassLoader) plugin.getClass().getClassLoader();
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try {
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ADD_URL.invoke(classLoader, jarFile.toURI().toURL());
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} catch (Exception e) {
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throw new RuntimeException("Error loading dependency: " + jarFile.toString(), e);
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}
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log.info("Loaded dependency '" + name + "'.");
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}
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private static File getLibraryFolder() {
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File pluginsDir = plugin.getDataFolder().getParentFile();
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File libraryDir = new File(pluginsDir, "EtzCore/lib");
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libraryDir.mkdirs();
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return libraryDir;
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}
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private static URL getURL(String group, String artifact, String version, String repository) throws Exception {
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String repo = repository;
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if (!repo.endsWith("/")) {
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repo += "/";
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}
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String path = String.format("%s/%s/%s/%s-%s.jar", group.replace(".", "/"), artifact, version, artifact, version);
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return new URL(repo + path);
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}
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}
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