91 lines
2.4 KiB
Java
91 lines
2.4 KiB
Java
/*
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* This program is free software: you can redistribute it and/or modify it under
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* the terms of the GNU General Public License as published by the Free Software
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* Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package com.l2jserver.gameserver.util;
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import java.io.DataInputStream;
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import java.io.File;
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import java.io.IOException;
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import java.util.HashSet;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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import java.util.zip.ZipEntry;
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import java.util.zip.ZipFile;
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/**
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* This is a class loader for the dynamic extensions used by DynamicExtension class.
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* @version $Revision: $ $Date: $
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* @author galun
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*/
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public class JarClassLoader extends ClassLoader
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{
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private static Logger _log = Logger.getLogger(JarClassLoader.class.getCanonicalName());
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HashSet<String> _jars = new HashSet<>();
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public void addJarFile(String filename)
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{
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_jars.add(filename);
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}
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@Override
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public Class<?> findClass(String name) throws ClassNotFoundException
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{
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try
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{
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byte[] b = loadClassData(name);
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return defineClass(name, b, 0, b.length);
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}
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catch (Exception e)
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{
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throw new ClassNotFoundException(name);
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}
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}
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private byte[] loadClassData(String name) throws IOException
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{
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byte[] classData = null;
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for (String jarFile : _jars)
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{
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File file = new File(jarFile);
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try (ZipFile zipFile = new ZipFile(file);)
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{
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String fileName = name.replace('.', '/') + ".class";
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ZipEntry entry = zipFile.getEntry(fileName);
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if (entry == null)
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{
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continue;
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}
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classData = new byte[(int) entry.getSize()];
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try (DataInputStream zipStream = new DataInputStream(zipFile.getInputStream(entry)))
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{
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zipStream.readFully(classData, 0, (int) entry.getSize());
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}
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break;
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}
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catch (IOException e)
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{
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_log.log(Level.WARNING, jarFile + ": " + e.getMessage(), e);
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continue;
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}
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}
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if (classData == null)
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{
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throw new IOException("class not found in " + _jars);
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}
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return classData;
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}
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}
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