1 /* 2 * Copyright (c) 2013, 2017, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 /* 25 * @test 26 * @bug 8004970 27 * @summary Lambda serialization in the presence of class loaders 28 * @run main LambdaClassLoaderSerialization 29 * @author Peter Levart 30 */ 31 32 import java.io.ByteArrayInputStream; 33 import java.io.ByteArrayOutputStream; 34 import java.io.IOException; 35 import java.io.InputStream; 36 import java.io.ObjectInputStream; 37 import java.io.ObjectOutputStream; 38 import java.io.Serializable; 39 40 public class LambdaClassLoaderSerialization { 41 42 public interface SerializableRunnable extends Runnable, Serializable {} 43 44 public static class MyCode implements SerializableRunnable { 45 serialize(Object o)46 private byte[] serialize(Object o) { 47 ByteArrayOutputStream baos; 48 try ( 49 ObjectOutputStream oos = 50 new ObjectOutputStream(baos = new ByteArrayOutputStream()) 51 ) { 52 oos.writeObject(o); 53 } 54 catch (IOException e) { 55 throw new RuntimeException(e); 56 } 57 return baos.toByteArray(); 58 } 59 deserialize(byte[] bytes)60 private <T> T deserialize(byte[] bytes) { 61 try ( 62 ObjectInputStream ois = 63 new ObjectInputStream(new ByteArrayInputStream(bytes)) 64 ) { 65 return (T) ois.readObject(); 66 } 67 catch (IOException | ClassNotFoundException e) { 68 throw new RuntimeException(e); 69 } 70 } 71 72 @Override run()73 public void run() { 74 System.out.println(" this: " + this); 75 76 SerializableRunnable deSerializedThis = deserialize(serialize(this)); 77 System.out.println(" deSerializedThis: " + deSerializedThis); 78 79 SerializableRunnable runnable = () -> {System.out.println("HELLO");}; 80 System.out.println(" runnable: " + runnable); 81 82 SerializableRunnable deSerializedRunnable = deserialize(serialize(runnable)); 83 System.out.println("deSerializedRunnable: " + deSerializedRunnable); 84 } 85 } 86 main(String[] args)87 public static void main(String[] args) throws Exception { 88 ClassLoader myCl = new MyClassLoader( 89 LambdaClassLoaderSerialization.class.getClassLoader() 90 ); 91 Class<?> myCodeClass = Class.forName( 92 LambdaClassLoaderSerialization.class.getName() + "$MyCode", 93 true, 94 myCl 95 ); 96 Runnable myCode = (Runnable) myCodeClass.newInstance(); 97 myCode.run(); 98 } 99 100 static class MyClassLoader extends ClassLoader { MyClassLoader(ClassLoader parent)101 MyClassLoader(ClassLoader parent) { 102 super(parent); 103 } 104 105 @Override loadClass(String name, boolean resolve)106 protected Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException { 107 if (name.indexOf('.') < 0) { 108 synchronized (getClassLoadingLock(name)) { 109 Class<?> c = findLoadedClass(name); 110 if (c == null) { 111 c = findClass(name); 112 } 113 if (resolve) { 114 resolveClass(c); 115 } 116 return c; 117 } 118 } else { 119 return super.loadClass(name, resolve); 120 } 121 } 122 123 @Override findClass(String name)124 protected Class<?> findClass(String name) throws ClassNotFoundException { 125 String path = name.replace('.', '/').concat(".class"); 126 try (InputStream is = getResourceAsStream(path)) { 127 if (is != null) { 128 byte[] bytes = is.readAllBytes(); 129 return defineClass(name, bytes, 0, bytes.length); 130 } else { 131 throw new ClassNotFoundException(name); 132 } 133 } 134 catch (IOException e) { 135 throw new ClassNotFoundException(name, e); 136 } 137 } 138 } 139 } 140