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 * @library /lib/testlibrary 29 * @build jdk.testlibrary.IOUtils 30 * @run main LambdaClassLoaderSerialization 31 * @author Peter Levart 32 */ 33 34 import java.io.ByteArrayInputStream; 35 import java.io.ByteArrayOutputStream; 36 import java.io.IOException; 37 import java.io.InputStream; 38 import java.io.ObjectInputStream; 39 import java.io.ObjectOutputStream; 40 import java.io.Serializable; 41 42 public class LambdaClassLoaderSerialization { 43 44 public interface SerializableRunnable extends Runnable, Serializable {} 45 46 public static class MyCode implements SerializableRunnable { 47 48 private byte[] serialize(Object o) { 49 ByteArrayOutputStream baos; 50 try ( 51 ObjectOutputStream oos = 52 new ObjectOutputStream(baos = new ByteArrayOutputStream()) 53 ) { 54 oos.writeObject(o); 55 } 56 catch (IOException e) { 57 throw new RuntimeException(e); 58 } 59 return baos.toByteArray(); 60 } 61 62 private <T> T deserialize(byte[] bytes) { 63 try ( 64 ObjectInputStream ois = 65 new ObjectInputStream(new ByteArrayInputStream(bytes)) 66 ) { 67 return (T) ois.readObject(); 68 } 69 catch (IOException | ClassNotFoundException e) { 70 throw new RuntimeException(e); 71 } 72 } 73 74 @Override 75 public void run() { 76 System.out.println(" this: " + this); 77 78 SerializableRunnable deSerializedThis = deserialize(serialize(this)); 79 System.out.println(" deSerializedThis: " + deSerializedThis); 80 81 SerializableRunnable runnable = () -> {System.out.println("HELLO");}; 82 System.out.println(" runnable: " + runnable); 83 84 SerializableRunnable deSerializedRunnable = deserialize(serialize(runnable)); 85 System.out.println("deSerializedRunnable: " + deSerializedRunnable); 86 } 87 } 88 89 public static void main(String[] args) throws Exception { 90 ClassLoader myCl = new MyClassLoader( 91 LambdaClassLoaderSerialization.class.getClassLoader() 92 ); 93 Class<?> myCodeClass = Class.forName( 94 LambdaClassLoaderSerialization.class.getName() + "$MyCode", 95 true, 96 myCl 97 ); 98 Runnable myCode = (Runnable) myCodeClass.newInstance(); 99 myCode.run(); 100 } 101 102 static class MyClassLoader extends ClassLoader { 103 MyClassLoader(ClassLoader parent) { 104 super(parent); 105 } 106 107 @Override 108 protected Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException { 109 if (name.indexOf('.') < 0) { 110 synchronized (getClassLoadingLock(name)) { 111 Class<?> c = findLoadedClass(name); 112 if (c == null) { 113 c = findClass(name); 114 } 115 if (resolve) { 116 resolveClass(c); 117 } 118 return c; 119 } 120 } else { 121 return super.loadClass(name, resolve); 122 } 123 } 124 125 @Override 126 protected Class<?> findClass(String name) throws ClassNotFoundException { 127 String path = name.replace('.', '/').concat(".class"); 128 try (InputStream is = getResourceAsStream(path)) { 129 if (is != null) { 130 byte[] bytes = is.readAllBytes(); 131 return defineClass(name, bytes, 0, bytes.length); 132 } else { 133 throw new ClassNotFoundException(name); 134 } 135 } 136 catch (IOException e) { 137 throw new ClassNotFoundException(name, e); 138 } 139 } 140 } 141 }