140 lines
4.8 KiB
Java
140 lines
4.8 KiB
Java
/*
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* Copyright (c) 2013, 2017, 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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/*
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* @test
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* @bug 8004970
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* @summary Lambda serialization in the presence of class loaders
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* @run main LambdaClassLoaderSerialization
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* @author Peter Levart
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*/
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.io.ObjectInputStream;
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import java.io.ObjectOutputStream;
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import java.io.Serializable;
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public class LambdaClassLoaderSerialization {
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public interface SerializableRunnable extends Runnable, Serializable {}
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public static class MyCode implements SerializableRunnable {
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private byte[] serialize(Object o) {
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ByteArrayOutputStream baos;
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try (
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ObjectOutputStream oos =
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new ObjectOutputStream(baos = new ByteArrayOutputStream())
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) {
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oos.writeObject(o);
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}
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catch (IOException e) {
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throw new RuntimeException(e);
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}
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return baos.toByteArray();
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}
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private <T> T deserialize(byte[] bytes) {
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try (
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ObjectInputStream ois =
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new ObjectInputStream(new ByteArrayInputStream(bytes))
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) {
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return (T) ois.readObject();
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}
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catch (IOException | ClassNotFoundException e) {
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throw new RuntimeException(e);
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}
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}
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@Override
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public void run() {
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System.out.println(" this: " + this);
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SerializableRunnable deSerializedThis = deserialize(serialize(this));
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System.out.println(" deSerializedThis: " + deSerializedThis);
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SerializableRunnable runnable = () -> {System.out.println("HELLO");};
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System.out.println(" runnable: " + runnable);
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SerializableRunnable deSerializedRunnable = deserialize(serialize(runnable));
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System.out.println("deSerializedRunnable: " + deSerializedRunnable);
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}
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}
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public static void main(String[] args) throws Exception {
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ClassLoader myCl = new MyClassLoader(
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LambdaClassLoaderSerialization.class.getClassLoader()
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);
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Class<?> myCodeClass = Class.forName(
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LambdaClassLoaderSerialization.class.getName() + "$MyCode",
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true,
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myCl
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);
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Runnable myCode = (Runnable) myCodeClass.newInstance();
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myCode.run();
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}
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static class MyClassLoader extends ClassLoader {
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MyClassLoader(ClassLoader parent) {
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super(parent);
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}
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@Override
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protected Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {
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if (name.indexOf('.') < 0) {
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synchronized (getClassLoadingLock(name)) {
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Class<?> c = findLoadedClass(name);
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if (c == null) {
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c = findClass(name);
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}
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if (resolve) {
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resolveClass(c);
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}
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return c;
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}
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} else {
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return super.loadClass(name, resolve);
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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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String path = name.replace('.', '/').concat(".class");
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try (InputStream is = getResourceAsStream(path)) {
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if (is != null) {
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byte[] bytes = is.readAllBytes();
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return defineClass(name, bytes, 0, bytes.length);
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} else {
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throw new ClassNotFoundException(name);
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}
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}
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catch (IOException e) {
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throw new ClassNotFoundException(name, e);
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}
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}
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}
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}
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