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 * @key randomness 38 */ 39 public class Serialization { 40 41 private static final int NUM_SETS = 43; 42 private static final int MAX_CAPACITY = 257; 43 private static final float MAX_LOAD_FACTOR = 100.0F; 44 45 private static final Random rnd = ThreadLocalRandom.current(); 46 47 private static HashSet<Integer> createHashSet() { 48 int capacity = rnd.nextInt(MAX_CAPACITY); 49 float loadFactor = Float.MIN_VALUE + rnd.nextFloat()*MAX_LOAD_FACTOR; 50 HashSet<Integer> hashSet = new HashSet<Integer>(capacity, loadFactor); 51 float multiplier = 2*rnd.nextFloat(); // range [0,2] 52 int size = (int)(capacity*loadFactor*multiplier); 53 for (int i = 0; i < size; i++) { 54 hashSet.add(rnd.nextInt()); 55 } 56 return hashSet; 57 } 58 59 private static HashSet<Integer> serDeser(HashSet<Integer> hashSet) throws IOException, ClassNotFoundException { 60 ByteArrayOutputStream baos = new ByteArrayOutputStream(); 61 ObjectOutputStream oos = new ObjectOutputStream(baos); 62 oos.writeObject(hashSet); 63 oos.flush(); 64 65 ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray()); 66 ObjectInputStream ois = new ObjectInputStream(bais); 67 HashSet<Integer> result = (HashSet<Integer>)ois.readObject(); 68 69 oos.close(); 70 ois.close(); 71 72 return result; 73 } 74 75 private static void printHashSet(HashSet<Integer> hashSet) { 76 System.err.println("Size: "+hashSet.size()); 77 for (Object o : hashSet) { 78 System.err.println(o); 79 } 80 } 81 82 public static void main(String[] args) { 83 int failures = 0; 84 85 for (int i = 0; i < NUM_SETS; i++) { 86 HashSet<Integer> hashSet = createHashSet(); 87 88 HashSet<Integer> result = null; 89 try { 90 result = serDeser(hashSet); 91 } catch (IOException ioe) { 92 System.err.println(ioe); 93 failures++; 94 } catch (ClassNotFoundException cnfe) { 95 System.err.println(cnfe); 96 failures++; 97 } 98 99 if (!hashSet.equals(result)) { 100 System.err.println("Unequal HashSets!"); 101 printHashSet(hashSet); 102 System.err.println(); 103 failures++; 104 } 105 } 106 107 if (failures != 0) { 108 throw new RuntimeException("HashSet/Serialzation failed with "+ 109 failures+" failures!"); 110 } 111 } 112 }