124 lines
3.8 KiB
Java
124 lines
3.8 KiB
Java
/*
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* Copyright (C) 2006 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*
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* Redistribution and use in source and binary forms, with or without modification, are
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* permitted provided that the following conditions are met: Redistributions of source code
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* must retain the above copyright notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice, this list of
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* conditions and the following disclaimer in the documentation and/or other materials
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* provided with the distribution. Neither the name of the Sun Microsystems nor the names of
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* is contributors may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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package com.l2jmobius.commons.javaengine;
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import java.io.File;
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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.util.ArrayList;
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import java.util.List;
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import java.util.Map;
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import java.util.StringTokenizer;
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/**
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* ClassLoader that loads .class bytes from memory.
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* @author A. Sundararajan
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*/
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public final class MemoryClassLoader extends URLClassLoader
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{
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private final Map<String, byte[]> classBytes;
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public MemoryClassLoader(Map<String, byte[]> classBytes, String classPath, ClassLoader parent)
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{
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super(toURLs(classPath), parent);
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this.classBytes = classBytes;
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}
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public MemoryClassLoader(Map<String, byte[]> classBytes, String classPath)
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{
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this(classBytes, classPath, null);
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}
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public Class<?> load(String className) throws ClassNotFoundException
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{
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return loadClass(className);
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}
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public Iterable<Class<?>> loadAll() throws ClassNotFoundException
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{
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final List<Class<?>> classes = new ArrayList<>(classBytes.size());
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for (String name : classBytes.keySet())
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{
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classes.add(loadClass(name));
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}
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return classes;
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}
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@Override
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protected Class<?> findClass(String className) throws ClassNotFoundException
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{
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final byte buf[] = classBytes.get(className);
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if (buf != null)
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{
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// clear the bytes in map -- we don't need it anymore
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classBytes.put(className, null);
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return defineClass(className, buf, 0, buf.length);
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}
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return super.findClass(className);
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}
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private static URL[] toURLs(String classPath)
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{
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if (classPath == null)
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{
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return new URL[0];
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}
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final List<URL> list = new ArrayList<>();
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final StringTokenizer st = new StringTokenizer(classPath, File.pathSeparator);
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while (st.hasMoreTokens())
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{
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final String token = st.nextToken();
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final File file = new File(token);
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if (file.exists())
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{
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try
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{
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list.add(file.toURI().toURL());
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}
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catch (MalformedURLException mue)
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{
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//
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}
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}
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else
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{
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try
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{
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list.add(new URL(token));
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}
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catch (MalformedURLException mue)
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{
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//
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}
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}
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}
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final URL res[] = new URL[list.size()];
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list.toArray(res);
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return res;
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}
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}
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