1 /* 2 * Copyright (c) 1999, 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 4190323 27 * @summary EMPTY_SET, EMPTY_LIST, and the collections returned by 28 * nCopies and singleton were spec'd to be serializable, but weren't. 29 */ 30 31 import java.io.*; 32 import java.util.*; 33 34 public class Ser { main(String[] args)35 public static void main(String[] args) throws Exception { 36 37 try { 38 ByteArrayOutputStream bos = new ByteArrayOutputStream(); 39 ObjectOutputStream out = new ObjectOutputStream(bos); 40 out.writeObject(Collections.EMPTY_SET); 41 out.flush(); 42 ObjectInputStream in = new ObjectInputStream( 43 new ByteArrayInputStream(bos.toByteArray())); 44 45 if (!Collections.EMPTY_SET.equals(in.readObject())) 46 throw new RuntimeException("empty set Ser/Deser failure."); 47 } catch (Exception e) { 48 throw new RuntimeException("Failed to serialize empty set:" + e); 49 } 50 51 try { 52 ByteArrayOutputStream bos = new ByteArrayOutputStream(); 53 ObjectOutputStream out = new ObjectOutputStream(bos); 54 out.writeObject(Collections.EMPTY_LIST); 55 out.flush(); 56 ObjectInputStream in = new ObjectInputStream( 57 new ByteArrayInputStream(bos.toByteArray())); 58 59 if (!Collections.EMPTY_LIST.equals(in.readObject())) 60 throw new RuntimeException("empty list Ser/Deser failure."); 61 } catch (Exception e) { 62 throw new RuntimeException("Failed to serialize empty list:" + e); 63 } 64 65 try { 66 ByteArrayOutputStream bos = new ByteArrayOutputStream(); 67 ObjectOutputStream out = new ObjectOutputStream(bos); 68 Set gumby = Collections.singleton("gumby"); 69 out.writeObject(gumby); 70 out.flush(); 71 ObjectInputStream in = new ObjectInputStream( 72 new ByteArrayInputStream(bos.toByteArray())); 73 74 if (!gumby.equals(in.readObject())) 75 throw new RuntimeException("Singleton Ser/Deser failure."); 76 } catch (Exception e) { 77 throw new RuntimeException("Failed to serialize singleton:" + e); 78 } 79 80 try { 81 ByteArrayOutputStream bos = new ByteArrayOutputStream(); 82 ObjectOutputStream out = new ObjectOutputStream(bos); 83 List gumbies = Collections.nCopies(50, "gumby"); 84 out.writeObject(gumbies); 85 out.flush(); 86 ObjectInputStream in = new ObjectInputStream( 87 new ByteArrayInputStream(bos.toByteArray())); 88 89 if (!gumbies.equals(in.readObject())) 90 throw new RuntimeException("nCopies Ser/Deser failure."); 91 } catch (Exception e) { 92 throw new RuntimeException("Failed to serialize nCopies:" + e); 93 } 94 } 95 } 96