1 /* 2 * Copyright (c) 2005, 2015, 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 6783290 27 * @summary Test correct reading of an empty Descriptor. 28 * @author Jaroslav Bachorik 29 * @modules java.management 30 * @run clean SerializationTest1 31 * @run build SerializationTest1 32 * @run main SerializationTest1 33 */ 34 35 import java.io.*; 36 import javax.management.*; 37 38 public class SerializationTest1 { 39 public static void main(String[] args) throws Exception { 40 MBeanInfo mi1 = new MBeanInfo("", 41 "", 42 new MBeanAttributeInfo[]{}, 43 new MBeanConstructorInfo[]{}, 44 new MBeanOperationInfo[]{}, 45 new MBeanNotificationInfo[]{}, 46 ImmutableDescriptor.EMPTY_DESCRIPTOR); 47 48 test(mi1); 49 50 MBeanFeatureInfo mfi2 = new MBeanFeatureInfo("", 51 "", 52 ImmutableDescriptor.EMPTY_DESCRIPTOR); 53 54 test(mfi2); 55 } 56 57 public static void test(Object obj) throws Exception { 58 ByteArrayOutputStream baos = new ByteArrayOutputStream(); 59 ObjectOutputStream oos = new ObjectOutputStream(baos); 60 oos.writeObject(obj); 61 62 final boolean[] failed = new boolean[]{false}; 63 ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray()); 64 final ObjectInputStream ois = new ObjectInputStream(bais) { 65 protected Class<?> resolveClass(ObjectStreamClass desc) throws IOException, ClassNotFoundException { 66 System.out.println("*** " + desc.getName()); 67 if (desc.getName().equals("[Ljava.lang.Object;")) { // javax.management.Descriptor fields 68 Thread.dumpStack(); 69 for(StackTraceElement e : Thread.currentThread().getStackTrace()) { // checking for the deserialization location 70 if (e.getMethodName().equals("skipCustomData")) { // indicates the presence of unread values from the custom object serialization 71 failed[0] = true; 72 } 73 } 74 } 75 return super.resolveClass(desc); //To change body of generated methods, choose Tools | Templates. 76 } 77 }; 78 Object newObj = ois.readObject(); 79 80 if (failed[0]) { 81 throw new RuntimeException("Zero-length descriptor not read back"); 82 } 83 } 84 }