| /* |
| * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| /* |
| @test |
| @bug 8004970 |
| @summary Lambda serialization in the presence of class loaders |
| @author Peter Levart |
| */ |
| |
| import java.io.ByteArrayInputStream; |
| import java.io.ByteArrayOutputStream; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.ObjectInputStream; |
| import java.io.ObjectOutputStream; |
| import java.io.Serializable; |
| import java.util.Arrays; |
| |
| public class LambdaClassLoaderSerialization { |
| |
| public interface SerializableRunnable extends Runnable, Serializable {} |
| |
| public static class MyCode implements SerializableRunnable { |
| |
| private byte[] serialize(Object o) { |
| ByteArrayOutputStream baos; |
| try ( |
| ObjectOutputStream oos = |
| new ObjectOutputStream(baos = new ByteArrayOutputStream()) |
| ) { |
| oos.writeObject(o); |
| } |
| catch (IOException e) { |
| throw new RuntimeException(e); |
| } |
| return baos.toByteArray(); |
| } |
| |
| private <T> T deserialize(byte[] bytes) { |
| try ( |
| ObjectInputStream ois = |
| new ObjectInputStream(new ByteArrayInputStream(bytes)) |
| ) { |
| return (T) ois.readObject(); |
| } |
| catch (IOException | ClassNotFoundException e) { |
| throw new RuntimeException(e); |
| } |
| } |
| |
| @Override |
| public void run() { |
| System.out.println(" this: " + this); |
| |
| SerializableRunnable deSerializedThis = deserialize(serialize(this)); |
| System.out.println(" deSerializedThis: " + deSerializedThis); |
| |
| SerializableRunnable runnable = () -> {System.out.println("HELLO");}; |
| System.out.println(" runnable: " + runnable); |
| |
| SerializableRunnable deSerializedRunnable = deserialize(serialize(runnable)); |
| System.out.println("deSerializedRunnable: " + deSerializedRunnable); |
| } |
| } |
| |
| public static void main(String[] args) throws Exception { |
| ClassLoader myCl = new MyClassLoader( |
| LambdaClassLoaderSerialization.class.getClassLoader() |
| ); |
| Class<?> myCodeClass = Class.forName( |
| LambdaClassLoaderSerialization.class.getName() + "$MyCode", |
| true, |
| myCl |
| ); |
| Runnable myCode = (Runnable) myCodeClass.newInstance(); |
| myCode.run(); |
| } |
| |
| static class MyClassLoader extends ClassLoader { |
| MyClassLoader(ClassLoader parent) { |
| super(parent); |
| } |
| |
| @Override |
| protected Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException { |
| if (name.indexOf('.') < 0) { |
| synchronized (getClassLoadingLock(name)) { |
| Class<?> c = findLoadedClass(name); |
| if (c == null) { |
| c = findClass(name); |
| } |
| if (resolve) { |
| resolveClass(c); |
| } |
| return c; |
| } |
| } else { |
| return super.loadClass(name, resolve); |
| } |
| } |
| |
| @Override |
| protected Class<?> findClass(String name) throws ClassNotFoundException { |
| String path = name.replace('.', '/').concat(".class"); |
| try (InputStream is = getResourceAsStream(path)) { |
| if (is != null) { |
| byte[] bytes = readFully(is); |
| return defineClass(name, bytes, 0, bytes.length); |
| } else { |
| throw new ClassNotFoundException(name); |
| } |
| } |
| catch (IOException e) { |
| throw new ClassNotFoundException(name, e); |
| } |
| } |
| |
| static byte[] readFully(InputStream is) throws IOException { |
| byte[] output = {}; |
| int pos = 0; |
| while (true) { |
| int bytesToRead; |
| if (pos >= output.length) { // Only expand when there's no room |
| bytesToRead = output.length + 1024; |
| if (output.length < pos + bytesToRead) { |
| output = Arrays.copyOf(output, pos + bytesToRead); |
| } |
| } else { |
| bytesToRead = output.length - pos; |
| } |
| int cc = is.read(output, pos, bytesToRead); |
| if (cc < 0) { |
| if (output.length != pos) { |
| output = Arrays.copyOf(output, pos); |
| } |
| break; |
| } |
| pos += cc; |
| } |
| return output; |
| } |
| } |
| } |