0N/A/*
2362N/A * Copyright (c) 2005, 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 5018254
0N/A * @summary Test null-allowing Comparators
0N/A * @author Martin Buchholz
0N/A */
0N/A
0N/Aimport java.util.*;
0N/Aimport java.util.concurrent.*;
0N/A
0N/Apublic class NullAtEnd {
0N/A static volatile int passed = 0, failed = 0;
0N/A
0N/A static void fail(String msg) {
0N/A failed++;
0N/A new AssertionError(msg).printStackTrace();
0N/A }
0N/A
0N/A static void pass() {
0N/A passed++;
0N/A }
0N/A
0N/A static void unexpected(Throwable t) {
0N/A failed++;
0N/A t.printStackTrace();
0N/A }
0N/A
0N/A static void check(boolean condition, String msg) {
0N/A if (condition)
0N/A passed++;
0N/A else
0N/A fail(msg);
0N/A }
0N/A
0N/A static void check(boolean condition) {
0N/A check(condition, "Assertion failure");
0N/A }
0N/A
0N/A private static boolean eq(Object x, Object y) {
0N/A return x == null ? y == null : x.equals(y);
0N/A }
0N/A
0N/A private static final Comparator<String> NULL_AT_END
0N/A = new Comparator<String>() {
0N/A /**
0N/A * Allows for nulls. Null is greater than anything non-null.
0N/A */
0N/A public int compare(String x, String y) {
0N/A if (x == null && y == null) return 0;
0N/A if (x == null && y != null) return 1;
0N/A if (x != null && y == null) return -1;
0N/A return x.compareTo(y);
0N/A }
0N/A };
0N/A
0N/A public static void main(String[] args) {
0N/A try {
0N/A SortedMap<String,String> m1
0N/A = new TreeMap<String,String>(NULL_AT_END);
0N/A check(eq(m1.put("a", "a"), null));
0N/A check(eq(m1.put("b", "b"), null));
0N/A check(eq(m1.put("c", "c"), null));
0N/A check(eq(m1.put(null, "d"), null));
0N/A
0N/A SortedMap<String,String> m2 = new TreeMap<String,String>(m1);
0N/A
0N/A check(eq(m1.lastKey(), null));
0N/A check(eq(m1.get(m1.lastKey()), "d"));
0N/A check(eq(m1.remove(m1.lastKey()), "d"));
0N/A check(eq(m1.lastKey(), "c"));
0N/A
0N/A check(eq(m2.entrySet().toString(), "[a=a, b=b, c=c, null=d]"));
0N/A
0N/A SortedMap<String,String> m3 = m2.tailMap("b");
0N/A
0N/A check(eq(m3.lastKey(), null));
0N/A check(eq(m3.get(m3.lastKey()), "d"));
0N/A check(eq(m3.remove(m3.lastKey()), "d"));
0N/A check(eq(m3.lastKey(), "c"));
0N/A
0N/A } catch (Throwable t) { unexpected(t); }
0N/A
0N/A System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
0N/A if (failed > 0) throw new Error("Some tests failed");
0N/A }
0N/A}