1/*
2 * Copyright (c) 2006, 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 6404711
27 * @summary Check capacity management
28 * @author Martin Buchholz
29 */
30
31import java.io.*;
32import java.util.*;
33
34public class StickySize {
35    static void equalClones(BitSet s, int expectedSize) {
36        equal(expectedSize, clone(s).size());
37        equal(expectedSize, serialClone(s).size());
38        equal(expectedSize, s.size());
39        equal(clone(s), serialClone(s));
40    }
41
42    private static void realMain(String[] args) {
43        BitSet s;
44
45        s = new BitSet();       // non-sticky
46        equal(s.size(), 64);
47        equalClones(s, 0);
48        s.set(3*64);
49        s.set(7*64);
50        equal(s.size(), 8*64);
51        equalClones(s, 8*64);
52        s.clear(7*64);
53        equal(s.size(), 8*64);
54        equalClones(s, 4*64);
55
56        s = new BitSet(8*64);   // sticky
57        equalClones(s, 8*64);
58        s.set(3*64);
59        s.set(7*64);
60        equalClones(s, 8*64);
61        s.clear(7*64);
62        equalClones(s, 8*64);
63        equalClones(clone(s), 8*64);
64        equalClones(serialClone(s), 8*64);
65        s.set(17*64);           // Expand beyond sticky size
66        equalClones(s, 18*64);
67        s.clear(17*64);
68        equalClones(s, 4*64);
69    }
70
71    static BitSet clone(BitSet s) {
72        return (BitSet) s.clone();
73    }
74
75    //--------------------- Infrastructure ---------------------------
76    static volatile int passed = 0, failed = 0;
77    static void pass() {passed++;}
78    static void fail() {failed++; Thread.dumpStack();}
79    static void fail(String msg) {System.out.println(msg); fail();}
80    static void unexpected(Throwable t) {failed++; t.printStackTrace();}
81    static void check(boolean cond) {if (cond) pass(); else fail();}
82    static void equal(Object x, Object y) {
83        if (x == null ? y == null : x.equals(y)) pass();
84        else fail(x + " not equal to " + y);}
85    public static void main(String[] args) throws Throwable {
86        try {realMain(args);} catch (Throwable t) {unexpected(t);}
87        System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
88        if (failed > 0) throw new AssertionError("Some tests failed");}
89    static byte[] serializedForm(Object obj) {
90        try {
91            ByteArrayOutputStream baos = new ByteArrayOutputStream();
92            new ObjectOutputStream(baos).writeObject(obj);
93            return baos.toByteArray();
94        } catch (IOException e) { throw new RuntimeException(e); }}
95    static Object readObject(byte[] bytes)
96        throws IOException, ClassNotFoundException {
97        InputStream is = new ByteArrayInputStream(bytes);
98        return new ObjectInputStream(is).readObject();}
99    @SuppressWarnings("unchecked")
100    static <T> T serialClone(T obj) {
101        try { return (T) readObject(serializedForm(obj)); }
102        catch (Exception e) { throw new RuntimeException(e); }}
103}
104