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/*
* Copyright (c) 2013, 2017, 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
* @run main LambdaClassLoaderSerialization
* @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;
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 = is.readAllBytes();
return defineClass(name, bytes, 0, bytes.length);
} else {
throw new ClassNotFoundException(name);
}
}
catch (IOException e) {
throw new ClassNotFoundException(name, e);
}
}
}
}
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