89 lines
2.9 KiB
Java
89 lines
2.9 KiB
Java
/*
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* Copyright (c) 2013, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code 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
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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package metaspace.stressHierarchy.common.classloader;
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import java.net.URLClassLoader;
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import java.net.URL;
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import java.util.HashSet;
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import java.util.Set;
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import metaspace.stressHierarchy.common.generateHierarchy.NodeDescriptor;
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/**
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* This classloader tries to load each class itself before forwarding to parent.
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* Also it stores loaded classes and class names.
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*
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*/
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public class StressClassloader extends URLClassLoader {
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private final Set<Class<?>> loadedClasses = new HashSet<Class<?>>();
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private final Set<String> loadedClassesNames = new HashSet<String>();
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private String className;
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private byte[] bytecode;
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public StressClassloader(NodeDescriptor nodeDescriptor,
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StressClassloader parentClassLoader) {
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super(new URL[] {}, parentClassLoader);
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this.className = nodeDescriptor.className;
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this.bytecode = nodeDescriptor.bytecode;
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}
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public Set<Class<?>> getLoadedClasses() {
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return loadedClasses;
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}
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public Set<String> getLoadedClassNames() {
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return loadedClassesNames;
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}
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@Override
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public Class<?> loadClass(String name) throws ClassNotFoundException {
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if (loadedClassesNames.contains(name)) {
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throw new RuntimeException("Classloader " + toString() + " loads class " + name + " second time! ");
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}
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Class<?> alreadyLoaded = findLoadedClass(name);
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if (alreadyLoaded != null) {
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return alreadyLoaded;
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}
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if (className.equals(name)) {
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Class<?> clazz = defineClass(name, bytecode, 0, bytecode.length);
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loadedClasses.add(clazz);
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loadedClassesNames.add(clazz.getName());
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return clazz;
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} else {
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return super.loadClass(name);
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}
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}
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@Override
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public String toString() {
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return "StressClassloader@" + className;
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}
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}
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