mirror of https://github.com/GeyserMC/Geyser.git
102 lines
4.1 KiB
Java
102 lines
4.1 KiB
Java
/*
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* Copyright (c) 2019-2022 GeyserMC. http://geysermc.org
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* @author GeyserMC
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* @link https://github.com/GeyserMC/Geyser
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*/
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package org.geysermc.geyser.extension;
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import org.geysermc.geyser.api.extension.Extension;
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import org.geysermc.geyser.api.extension.ExtensionDescription;
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import org.geysermc.geyser.api.extension.exception.InvalidExtensionException;
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import java.lang.reflect.InvocationTargetException;
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import java.net.MalformedURLException;
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import java.net.URL;
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import java.net.URLClassLoader;
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import java.nio.file.Path;
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import java.util.HashMap;
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import java.util.Map;
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public class GeyserExtensionClassLoader extends URLClassLoader {
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private final GeyserExtensionLoader loader;
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private final Map<String, Class<?>> classes = new HashMap<>();
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private final Extension extension;
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public GeyserExtensionClassLoader(GeyserExtensionLoader loader, ClassLoader parent, ExtensionDescription description, Path path) throws InvalidExtensionException, MalformedURLException {
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super(new URL[] { path.toUri().toURL() }, parent);
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this.loader = loader;
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try {
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Class<?> jarClass;
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try {
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jarClass = Class.forName(description.main(), true, this);
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} catch (ClassNotFoundException ex) {
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throw new InvalidExtensionException("Class " + description.main() + " not found, extension cannot be loaded", ex);
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}
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Class<? extends Extension> extensionClass;
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try {
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extensionClass = jarClass.asSubclass(Extension.class);
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} catch (ClassCastException ex) {
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throw new InvalidExtensionException("Main class " + description.main() + " should extends GeyserExtension, but extends " + jarClass.getSuperclass().getSimpleName(), ex);
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}
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this.extension = extensionClass.getConstructor().newInstance();
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} catch (IllegalAccessException | InvocationTargetException | NoSuchMethodException ex) {
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throw new InvalidExtensionException("No public constructor", ex);
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} catch (InstantiationException ex) {
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throw new InvalidExtensionException("Abnormal extension type", ex);
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}
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}
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@Override
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protected Class<?> findClass(String name) throws ClassNotFoundException {
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return this.findClass(name, true);
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}
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protected Class<?> findClass(String name, boolean checkGlobal) throws ClassNotFoundException {
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if (name.startsWith("org.geysermc.geyser.") || name.startsWith("net.minecraft.")) {
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throw new ClassNotFoundException(name);
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}
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Class<?> result = this.classes.get(name);
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if (result == null) {
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if (checkGlobal) {
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result = this.loader.classByName(name);
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}
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if (result == null) {
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result = super.findClass(name);
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if (result != null) {
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this.loader.setClass(name, result);
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}
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}
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this.classes.put(name, result);
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}
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return result;
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}
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public Extension extension() {
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return this.extension;
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}
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}
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