1 /* 2 * Copyright (c) 2013, 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 import java.io.ByteArrayInputStream; 25 import java.io.ByteArrayOutputStream; 26 import java.io.IOException; 27 import java.io.ObjectInputStream; 28 import java.io.ObjectOutputStream; 29 import java.util.HashSet; 30 import java.util.Random; 31 import java.util.concurrent.ThreadLocalRandom; 32 33 /* 34 * @test 35 * @bug 8016252 36 * @summary Verify that a serialized HashSet may successfully be deserialized. 37 */ 38 public class Serialization { 39 40 private static final int NUM_SETS = 43; 41 private static final int MAX_CAPACITY = 257; 42 private static final float MAX_LOAD_FACTOR = 100.0F; 43 44 private static final Random rnd = ThreadLocalRandom.current(); 45 46 private static HashSet<Integer> createHashSet() { 47 int capacity = rnd.nextInt(MAX_CAPACITY); 48 float loadFactor = Float.MIN_VALUE + rnd.nextFloat()*MAX_LOAD_FACTOR; 49 HashSet<Integer> hashSet = new HashSet<Integer>(capacity, loadFactor); 50 float multiplier = 2*rnd.nextFloat(); // range [0,2] 51 int size = (int)(capacity*loadFactor*multiplier); 52 for (int i = 0; i < size; i++) { 53 hashSet.add(rnd.nextInt()); 54 } 55 return hashSet; 56 } 57 58 private static HashSet<Integer> serDeser(HashSet<Integer> hashSet) throws IOException, ClassNotFoundException { 59 ByteArrayOutputStream baos = new ByteArrayOutputStream(); 60 ObjectOutputStream oos = new ObjectOutputStream(baos); 61 oos.writeObject(hashSet); 62 oos.flush(); 63 64 ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray()); 65 ObjectInputStream ois = new ObjectInputStream(bais); 66 HashSet<Integer> result = (HashSet<Integer>)ois.readObject(); 67 68 oos.close(); 69 ois.close(); 70 71 return result; 72 } 73 74 private static void printHashSet(HashSet<Integer> hashSet) { 75 System.err.println("Size: "+hashSet.size()); 76 for (Object o : hashSet) { 77 System.err.println(o); 78 } 79 } 80 81 public static void main(String[] args) { 82 int failures = 0; 83 84 for (int i = 0; i < NUM_SETS; i++) { 85 HashSet<Integer> hashSet = createHashSet(); 86 87 HashSet<Integer> result = null; 88 try { 89 result = serDeser(hashSet); 90 } catch (IOException ioe) { 91 System.err.println(ioe); 92 failures++; 93 } catch (ClassNotFoundException cnfe) { 94 System.err.println(cnfe); 95 failures++; 96 } 97 98 if (!hashSet.equals(result)) { 99 System.err.println("Unequal HashSets!"); 100 printHashSet(hashSet); 101 System.err.println(); 102 failures++; 103 } 104 } 105 106 if (failures != 0) { 107 throw new RuntimeException("HashSet/Serialzation failed with "+ 108 failures+" failures!"); 109 } 110 } 111 }