90 lines
2.9 KiB
Java
90 lines
2.9 KiB
Java
/*
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* Copyright 2012 dorkbox, llc
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package dorkbox.build.util;
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import java.security.ProtectionDomain;
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import java.util.Iterator;
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import java.util.Map;
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import java.util.Map.Entry;
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import java.util.concurrent.ConcurrentHashMap;
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public class ByteClassloader extends java.lang.ClassLoader {
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private Map<String, byte[]> bytes = new ConcurrentHashMap<String, byte[]>();
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private Map<String, Class<?>> classes = new ConcurrentHashMap<String, Class<?>>();
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private final ProtectionDomain domain;
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public ByteClassloader(ClassLoader classloader) {
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super(classloader);
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this.domain = this.getClass().getProtectionDomain();
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}
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public final void saveBytes(String name, byte[] bytes) {
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// this defines our class, and saves it in our cache -- so that findClass() will work
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if (this.bytes != null) {
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this.bytes.put(name, bytes);
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}
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}
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@Override
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public Class<?> loadClass(String name) throws ClassNotFoundException {
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return loadClass(name, false);
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}
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// check OURSELVES first, then check our parent.
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@Override
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protected Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {
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if (this.bytes != null) {
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byte[] classBytes = this.bytes.get(name);
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if (classBytes != null) {
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// have to make sure that the package is properly setup.
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int i = -1;
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String packageName = name;
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while ((i = name.indexOf('.', i)) > 0) {
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packageName = name.substring(0, i++);
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if (getPackage(packageName) == null) {
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definePackage(packageName, null, null, null, null, null, null, null);
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}
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}
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Class<?> clazz = defineClass(name, classBytes, 0, classBytes.length, this.domain);
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if (resolve) {
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resolveClass(clazz);
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}
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// cache our classes that we create
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this.classes.put(name, clazz);
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return clazz;
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}
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}
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Class<?> c = this.classes.get(name);
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if (c != null) {
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return c;
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}
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return getParent().loadClass(name);
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}
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Iterator<Entry<String, byte[]>> getBytesIterator() {
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return this.bytes.entrySet().iterator();
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}
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} |