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/*
* Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.HashSet;
import java.util.Random;
import java.util.concurrent.ThreadLocalRandom;
/*
* @test
* @bug 8016252
* @summary Verify that a serialized HashSet may successfully be deserialized.
* @key randomness
*/
public class Serialization {
private static final int NUM_SETS = 43;
private static final int MAX_CAPACITY = 257;
private static final float MAX_LOAD_FACTOR = 100.0F;
private static final Random rnd = ThreadLocalRandom.current();
private static HashSet<Integer> createHashSet() {
int capacity = rnd.nextInt(MAX_CAPACITY);
float loadFactor = Float.MIN_VALUE + rnd.nextFloat()*MAX_LOAD_FACTOR;
HashSet<Integer> hashSet = new HashSet<Integer>(capacity, loadFactor);
float multiplier = 2*rnd.nextFloat(); // range [0,2]
int size = (int)(capacity*loadFactor*multiplier);
for (int i = 0; i < size; i++) {
hashSet.add(rnd.nextInt());
}
return hashSet;
}
private static HashSet<Integer> serDeser(HashSet<Integer> hashSet) throws IOException, ClassNotFoundException {
ByteArrayOutputStream baos = new ByteArrayOutputStream();
ObjectOutputStream oos = new ObjectOutputStream(baos);
oos.writeObject(hashSet);
oos.flush();
ByteArrayInputStream bais = new ByteArrayInputStream(baos.toByteArray());
ObjectInputStream ois = new ObjectInputStream(bais);
HashSet<Integer> result = (HashSet<Integer>)ois.readObject();
oos.close();
ois.close();
return result;
}
private static void printHashSet(HashSet<Integer> hashSet) {
System.err.println("Size: "+hashSet.size());
for (Object o : hashSet) {
System.err.println(o);
}
}
public static void main(String[] args) {
int failures = 0;
for (int i = 0; i < NUM_SETS; i++) {
HashSet<Integer> hashSet = createHashSet();
HashSet<Integer> result = null;
try {
result = serDeser(hashSet);
} catch (IOException ioe) {
System.err.println(ioe);
failures++;
} catch (ClassNotFoundException cnfe) {
System.err.println(cnfe);
failures++;
}
if (!hashSet.equals(result)) {
System.err.println("Unequal HashSets!");
printHashSet(hashSet);
System.err.println();
failures++;
}
}
if (failures != 0) {
throw new RuntimeException("HashSet/Serialzation failed with "+
failures+" failures!");
}
}
}
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