0N/A/*
2362N/A * Copyright (c) 2003, 2007, Oracle and/or its affiliates. All rights reserved.
0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
0N/A *
0N/A * This code is free software; you can redistribute it and/or modify it
0N/A * under the terms of the GNU General Public License version 2 only, as
0N/A * published by the Free Software Foundation.
0N/A *
0N/A * This code is distributed in the hope that it will be useful, but WITHOUT
0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
0N/A * version 2 for more details (a copy is included in the LICENSE file that
0N/A * accompanied this code).
0N/A *
0N/A * You should have received a copy of the GNU General Public License version
0N/A * 2 along with this work; if not, write to the Free Software Foundation,
0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
0N/A *
2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
2362N/A * or visit www.oracle.com if you need additional information or have any
2362N/A * questions.
0N/A */
0N/A
0N/A/*
0N/A * @test
0N/A * @bug 4809442 6366832 4974878 6372554 4890211 6483125
0N/A * @summary Basic test for Collections.reverseOrder
0N/A * @author Josh Bloch, Martin Buchholz
0N/A */
0N/A
0N/Aimport java.util.*;
0N/Aimport java.io.*;
0N/A
0N/Apublic class ReverseOrder2 {
0N/A final static int N = 100;
0N/A
0N/A static void realMain(String[] args) throws Throwable {
0N/A check(Collections.reverseOrder()
0N/A == Collections.reverseOrder(null));
0N/A
0N/A check(Collections.reverseOrder()
0N/A == reincarnate(Collections.reverseOrder()));
0N/A
0N/A check(Collections.reverseOrder(Collections.reverseOrder(cmp))
0N/A == cmp);
0N/A
0N/A equal(Collections.reverseOrder(cmp),
0N/A Collections.reverseOrder(cmp));
0N/A
0N/A equal(Collections.reverseOrder(cmp).hashCode(),
0N/A Collections.reverseOrder(cmp).hashCode());
0N/A
0N/A check(Collections.reverseOrder(cmp).hashCode() !=
0N/A cmp.hashCode());
0N/A
0N/A test(new ArrayList<String>());
0N/A test(new LinkedList<String>());
0N/A test2(new ArrayList<Integer>());
0N/A test2(new LinkedList<Integer>());
0N/A }
0N/A
0N/A static void test(List<String> list) {
0N/A for (int i = 0; i < N; i++)
0N/A list.add(String.valueOf(i));
0N/A Collections.shuffle(list);
0N/A Collections.sort(list, Collections.reverseOrder(cmp));
0N/A equal(list, golden);
0N/A }
0N/A
0N/A private static Comparator<String> cmp = new Comparator<String> () {
0N/A public int compare(String s1, String s2) {
0N/A int i1 = Integer.parseInt(s1);
0N/A int i2 = Integer.parseInt(s2);
0N/A return (i1 < i2 ? Integer.MIN_VALUE : (i1 == i2 ? 0 : 1));
0N/A }
0N/A };
0N/A
0N/A private final static List<String> golden = new ArrayList<String>(N);
0N/A static {
0N/A for (int i = N-1; i >= 0; i--)
0N/A golden.add(String.valueOf(i));
0N/A }
0N/A
0N/A static void test2(List<Integer> list) {
0N/A for (int i = 0; i < N; i++)
0N/A list.add(i);
0N/A Collections.shuffle(list);
0N/A Collections.sort(list, Collections.reverseOrder(null));
0N/A equal(list, golden2);
0N/A }
0N/A
0N/A private final static List<Integer> golden2 = new ArrayList<Integer>(N);
0N/A static {
0N/A for (int i = N-1; i >= 0; i--)
0N/A golden2.add(i);
0N/A }
0N/A
0N/A //--------------------- Infrastructure ---------------------------
0N/A static volatile int passed = 0, failed = 0;
0N/A static void pass() {passed++;}
0N/A static void fail() {failed++; Thread.dumpStack();}
0N/A static void fail(String msg) {System.out.println(msg); fail();}
0N/A static void unexpected(Throwable t) {failed++; t.printStackTrace();}
0N/A static void check(boolean cond) {if (cond) pass(); else fail();}
0N/A static void equal(Object x, Object y) {
0N/A if (x == null ? y == null : x.equals(y)) pass();
0N/A else fail(x + " not equal to " + y);}
0N/A public static void main(String[] args) throws Throwable {
0N/A try {realMain(args);} catch (Throwable t) {unexpected(t);}
0N/A System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
0N/A if (failed > 0) throw new AssertionError("Some tests failed");}
0N/A static byte[] serializedForm(Object obj) {
0N/A try {
0N/A ByteArrayOutputStream baos = new ByteArrayOutputStream();
0N/A new ObjectOutputStream(baos).writeObject(obj);
0N/A return baos.toByteArray();
0N/A } catch (IOException e) {throw new RuntimeException(e);}}
0N/A static Object readObject(byte[] bytes)
0N/A throws IOException, ClassNotFoundException {
0N/A InputStream is = new ByteArrayInputStream(bytes);
0N/A return new ObjectInputStream(is).readObject();}
0N/A @SuppressWarnings("unchecked")
0N/A static <T> T reincarnate(T obj) {
0N/A try {return (T) readObject(serializedForm(obj));}
0N/A catch (Exception e) {throw new RuntimeException(e);}}
0N/A}