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 package test.java.util.Collections; 32 33 import java.io.ByteArrayInputStream; 34 import java.io.ByteArrayOutputStream; 35 import java.io.ObjectInputStream; 36 import java.io.ObjectOutputStream; 37 import java.util.Collections; 38 import java.util.List; 39 import java.util.Set; 40 41 public class Ser { main(String[] args)42 public static void main(String[] args) throws Exception { 43 44 try { 45 ByteArrayOutputStream bos = new ByteArrayOutputStream(); 46 ObjectOutputStream out = new ObjectOutputStream(bos); 47 out.writeObject(Collections.EMPTY_SET); 48 out.flush(); 49 ObjectInputStream in = new ObjectInputStream( 50 new ByteArrayInputStream(bos.toByteArray())); 51 52 if (!Collections.EMPTY_SET.equals(in.readObject())) 53 throw new RuntimeException("empty set Ser/Deser failure."); 54 } catch (Exception e) { 55 throw new RuntimeException("Failed to serialize empty set:" + e); 56 } 57 58 try { 59 ByteArrayOutputStream bos = new ByteArrayOutputStream(); 60 ObjectOutputStream out = new ObjectOutputStream(bos); 61 out.writeObject(Collections.EMPTY_LIST); 62 out.flush(); 63 ObjectInputStream in = new ObjectInputStream( 64 new ByteArrayInputStream(bos.toByteArray())); 65 66 if (!Collections.EMPTY_LIST.equals(in.readObject())) 67 throw new RuntimeException("empty list Ser/Deser failure."); 68 } catch (Exception e) { 69 throw new RuntimeException("Failed to serialize empty list:" + e); 70 } 71 72 try { 73 ByteArrayOutputStream bos = new ByteArrayOutputStream(); 74 ObjectOutputStream out = new ObjectOutputStream(bos); 75 Set gumby = Collections.singleton("gumby"); 76 out.writeObject(gumby); 77 out.flush(); 78 ObjectInputStream in = new ObjectInputStream( 79 new ByteArrayInputStream(bos.toByteArray())); 80 81 if (!gumby.equals(in.readObject())) 82 throw new RuntimeException("Singleton Ser/Deser failure."); 83 } catch (Exception e) { 84 throw new RuntimeException("Failed to serialize singleton:" + e); 85 } 86 87 try { 88 ByteArrayOutputStream bos = new ByteArrayOutputStream(); 89 ObjectOutputStream out = new ObjectOutputStream(bos); 90 List gumbies = Collections.nCopies(50, "gumby"); 91 out.writeObject(gumbies); 92 out.flush(); 93 ObjectInputStream in = new ObjectInputStream( 94 new ByteArrayInputStream(bos.toByteArray())); 95 96 if (!gumbies.equals(in.readObject())) 97 throw new RuntimeException("nCopies Ser/Deser failure."); 98 } catch (Exception e) { 99 throw new RuntimeException("Failed to serialize nCopies:" + e); 100 } 101 } 102 } 103