/*

 * Copyright (c) 2006, 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.

 */

/*

 * @test

 * @bug 6404711

 * @summary Check capacity management

 * @author Martin Buchholz

 */

import java.io.*;

import java.util.*;

public class StickySize {

    static void equalClones(BitSet s, int expectedSize) {

        equal(expectedSize, clone(s).size());

        equal(expectedSize, serialClone(s).size());

        equal(expectedSize, s.size());

        equal(clone(s), serialClone(s));

    }

    private static void realMain(String[] args) {

        BitSet s;

        s = new BitSet();       // non-sticky

        equal(s.size(), 64);

        equalClones(s, 0);

        s.set(3*64);

        s.set(7*64);

        equal(s.size(), 8*64);

        equalClones(s, 8*64);

        s.clear(7*64);

        equal(s.size(), 8*64);

        equalClones(s, 4*64);

        s = new BitSet(8*64);   // sticky

        equalClones(s, 8*64);

        s.set(3*64);

        s.set(7*64);

        equalClones(s, 8*64);

        s.clear(7*64);

        equalClones(s, 8*64);

        equalClones(clone(s), 8*64);

        equalClones(serialClone(s), 8*64);

        s.set(17*64);           // Expand beyond sticky size

        equalClones(s, 18*64);

        s.clear(17*64);

        equalClones(s, 4*64);

    }

    static BitSet clone(BitSet s) {

        return (BitSet) s.clone();

    }

    //--------------------- Infrastructure ---------------------------

    static volatile int passed = 0, failed = 0;

    static void pass() {passed++;}

    static void fail() {failed++; Thread.dumpStack();}

    static void fail(String msg) {System.out.println(msg); fail();}

    static void unexpected(Throwable t) {failed++; t.printStackTrace();}

    static void check(boolean cond) {if (cond) pass(); else fail();}

    static void equal(Object x, Object y) {

        if (x == null ? y == null : x.equals(y)) pass();

        else fail(x + " not equal to " + y);}

    public static void main(String[] args) throws Throwable {

        try {realMain(args);} catch (Throwable t) {unexpected(t);}

        System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);

        if (failed > 0) throw new AssertionError("Some tests failed");}

    static byte[] serializedForm(Object obj) {

        try {

            ByteArrayOutputStream baos = new ByteArrayOutputStream();

            new ObjectOutputStream(baos).writeObject(obj);

            return baos.toByteArray();

        } catch (IOException e) { throw new RuntimeException(e); }}

    static Object readObject(byte[] bytes)

        throws IOException, ClassNotFoundException {

        InputStream is = new ByteArrayInputStream(bytes);

        return new ObjectInputStream(is).readObject();}

    @SuppressWarnings("unchecked")

    static <T> T serialClone(T obj) {

        try { return (T) readObject(serializedForm(obj)); }

        catch (Exception e) { throw new RuntimeException(e); }}

}