1 /*
   2  * Copyright (c) 2013, 2014, 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 import java.util.Arrays;
  42 
  43 import jdk.testlibrary.IOUtils;
  44 
  45 public class LambdaClassLoaderSerialization {
  46 
  47     public interface SerializableRunnable extends Runnable, Serializable {}
  48 
  49     public static class MyCode implements SerializableRunnable {
  50 
  51         private byte[] serialize(Object o) {
  52             ByteArrayOutputStream baos;
  53             try (
  54                 ObjectOutputStream oos =
  55                     new ObjectOutputStream(baos = new ByteArrayOutputStream())
  56             ) {
  57                 oos.writeObject(o);
  58             }
  59             catch (IOException e) {
  60                 throw new RuntimeException(e);
  61             }
  62             return baos.toByteArray();
  63         }
  64 
  65         private <T> T deserialize(byte[] bytes) {
  66             try (
  67                 ObjectInputStream ois =
  68                     new ObjectInputStream(new ByteArrayInputStream(bytes))
  69             ) {
  70                 return (T) ois.readObject();
  71             }
  72             catch (IOException | ClassNotFoundException e) {
  73                 throw new RuntimeException(e);
  74             }
  75         }
  76 
  77         @Override
  78         public void run() {
  79             System.out.println("                this: " + this);
  80 
  81             SerializableRunnable deSerializedThis = deserialize(serialize(this));
  82             System.out.println("    deSerializedThis: " + deSerializedThis);
  83 
  84             SerializableRunnable runnable = () -> {System.out.println("HELLO");};
  85             System.out.println("            runnable: " + runnable);
  86 
  87             SerializableRunnable deSerializedRunnable = deserialize(serialize(runnable));
  88             System.out.println("deSerializedRunnable: " + deSerializedRunnable);
  89         }
  90     }
  91 
  92     public static void main(String[] args) throws Exception {
  93         ClassLoader myCl = new MyClassLoader(
  94             LambdaClassLoaderSerialization.class.getClassLoader()
  95         );
  96         Class<?> myCodeClass = Class.forName(
  97             LambdaClassLoaderSerialization.class.getName() + "$MyCode",
  98             true,
  99             myCl
 100         );
 101         Runnable myCode = (Runnable) myCodeClass.newInstance();
 102         myCode.run();
 103     }
 104 
 105     static class MyClassLoader extends ClassLoader {
 106         MyClassLoader(ClassLoader parent) {
 107             super(parent);
 108         }
 109 
 110         @Override
 111         protected Class<?> loadClass(String name, boolean resolve) throws ClassNotFoundException {
 112             if (name.indexOf('.') < 0) {
 113                 synchronized (getClassLoadingLock(name)) {
 114                     Class<?> c = findLoadedClass(name);
 115                     if (c == null) {
 116                         c = findClass(name);
 117                     }
 118                     if (resolve) {
 119                         resolveClass(c);
 120                     }
 121                     return c;
 122                 }
 123             } else {
 124                 return super.loadClass(name, resolve);
 125             }
 126         }
 127 
 128         @Override
 129         protected Class<?> findClass(String name) throws ClassNotFoundException {
 130             String path = name.replace('.', '/').concat(".class");
 131             try (InputStream is = getResourceAsStream(path)) {
 132                 if (is != null) {
 133                     byte[] bytes = IOUtils.readFully(is);
 134                     return defineClass(name, bytes, 0, bytes.length);
 135                 } else {
 136                     throw new ClassNotFoundException(name);
 137                 }
 138             }
 139             catch (IOException e) {
 140                 throw new ClassNotFoundException(name, e);
 141             }
 142         }
 143     }
 144 }