cn.nukkit.plugin.LibraryLoader Maven / Gradle / Ivy
package cn.nukkit.plugin;
import java.io.File;
import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.nio.file.Files;
import java.util.logging.Logger;
/**
* @since 15-12-13
*/
public class LibraryLoader {
private static final File BASE_FOLDER = new File("./libraries");
private static final Logger LOGGER = Logger.getLogger("LibraryLoader");
private static final String SUFFIX = ".jar";
static {
if (BASE_FOLDER.mkdir()) {
LOGGER.info("Created libraries folder.");
}
}
public static void load(String library) {
String[] split = library.split(":");
if (split.length != 3) {
throw new IllegalArgumentException(library);
}
load(new Library() {
@Override
public String getGroupId() {
return split[0];
}
@Override
public String getArtifactId() {
return split[1];
}
@Override
public String getVersion() {
return split[2];
}
});
}
public static void load(Library library) {
String filePath = library.getGroupId().replace('.', '/') + '/' + library.getArtifactId() + '/' + library.getVersion();
String fileName = library.getArtifactId() + '-' + library.getVersion() + SUFFIX;
File folder = new File(BASE_FOLDER, filePath);
if (folder.mkdirs()) {
LOGGER.info("Created " + folder.getPath() + '.');
}
File file = new File(folder, fileName);
if (!file.isFile()) try {
URL url = new URL("https://repo1.maven.org/maven2/" + filePath + '/' + fileName);
LOGGER.info("Get library from " + url + '.');
Files.copy(url.openStream(), file.toPath());
LOGGER.info("Get library " + fileName + " done!");
} catch (IOException e) {
throw new LibraryLoadException(library);
}
try {
Method method = URLClassLoader.class.getDeclaredMethod("addURL", URL.class);
boolean accessible = method.isAccessible();
if (!accessible) {
method.setAccessible(true);
}
URLClassLoader classLoader = (URLClassLoader) Thread.currentThread().getContextClassLoader();
URL url = file.toURI().toURL();
method.invoke(classLoader, url);
method.setAccessible(accessible);
} catch (NoSuchMethodException | MalformedURLException | IllegalAccessException | InvocationTargetException e) {
throw new LibraryLoadException(library);
}
LOGGER.info("Load library " + fileName + " done!");
}
public static File getBaseFolder() {
return BASE_FOLDER;
}
}