0N/A/*
0N/A * Copyright (c) 2006, 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 *
0N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
0N/A * or visit www.oracle.com if you need additional information or have any
0N/A * questions.
0N/A */
0N/A
0N/A/*
0N/A * @test
0N/A * @bug 6467933
0N/A * @summary Test proper handling of comparators permitting nulls
0N/A * @author Martin Buchholz
0N/A */
0N/A
0N/Aimport java.util.*;
0N/Aimport java.util.concurrent.*;
0N/Aimport java.util.concurrent.atomic.*;
0N/Aimport java.lang.reflect.*;
0N/A
0N/A@SuppressWarnings("unchecked")
0N/Apublic class NullPermissiveComparator {
0N/A
0N/A static void equal(Map m, String s) {
0N/A equal(m.toString(), s);
0N/A }
0N/A
0N/A static void realMain(String[] args) throws Throwable {
0N/A final Comparator nullLow = new Comparator() {
0N/A public int compare(Object x, Object y) {
0N/A return x == y ? 0 :
0N/A x == null ? -1 :
0N/A y == null ? 1 :
0N/A ((Comparable)x).compareTo(y); }};
0N/A
0N/A final Comparator nullHigh = new Comparator() {
0N/A public int compare(Object x, Object y) {
0N/A return x == y ? 0 :
0N/A x == null ? 1 :
0N/A y == null ? -1 :
0N/A ((Comparable)x).compareTo(y); }};
0N/A
0N/A TreeMap m = new TreeMap(nullLow);
0N/A
0N/A m.put("a", "A");
0N/A m.put("b", "B");
0N/A m.put("c", "C");
0N/A
0N/A equal(m, "{a=A, b=B, c=C}");
0N/A equal(m.headMap("b"), "{a=A}");
0N/A equal(m.tailMap("b"), "{b=B, c=C}");
0N/A equal(m.headMap(null), "{}");
0N/A equal(m.tailMap(null), "{a=A, b=B, c=C}");
0N/A
0N/A m.put(null, "NULL");
0N/A
0N/A equal(m, "{null=NULL, a=A, b=B, c=C}");
0N/A equal(m.headMap("b"), "{null=NULL, a=A}");
0N/A equal(m.tailMap("b"), "{b=B, c=C}");
0N/A equal(m.headMap(null), "{}");
0N/A equal(m.tailMap(null), "{null=NULL, a=A, b=B, c=C}");
0N/A
0N/A m = new TreeMap(nullHigh);
0N/A
0N/A m.put("a", "A");
0N/A m.put("b", "B");
0N/A m.put("c", "C");
0N/A
0N/A equal(m, "{a=A, b=B, c=C}");
0N/A equal(m.headMap("b"), "{a=A}");
0N/A equal(m.tailMap("b"), "{b=B, c=C}");
0N/A equal(m.headMap(null), "{a=A, b=B, c=C}");
0N/A equal(m.tailMap(null), "{}");
0N/A
0N/A m.put(null, "NULL");
0N/A
0N/A equal(m, "{a=A, b=B, c=C, null=NULL}");
0N/A equal(m.headMap("b"), "{a=A}");
0N/A equal(m.tailMap("b"), "{b=B, c=C, null=NULL}");
0N/A equal(m.headMap(null), "{a=A, b=B, c=C}");
0N/A equal(m.tailMap(null), "{null=NULL}");
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}
0N/A