113 lines
4.0 KiB
Java
113 lines
4.0 KiB
Java
/*
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* Copyright (c) 2006, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test
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* @bug 6467933
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* @summary Test proper handling of comparators permitting nulls
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* @author Martin Buchholz
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*/
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import java.util.Comparator;
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import java.util.Map;
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import java.util.TreeMap;
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@SuppressWarnings("unchecked")
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public class NullPermissiveComparator {
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static void equal(Map m, String s) {
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equal(m.toString(), s);
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}
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static void realMain(String[] args) throws Throwable {
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final Comparator nullLow = new Comparator() {
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public int compare(Object x, Object y) {
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return x == y ? 0 :
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x == null ? -1 :
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y == null ? 1 :
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((Comparable)x).compareTo(y); }};
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final Comparator nullHigh = new Comparator() {
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public int compare(Object x, Object y) {
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return x == y ? 0 :
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x == null ? 1 :
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y == null ? -1 :
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((Comparable)x).compareTo(y); }};
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TreeMap m = new TreeMap(nullLow);
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m.put("a", "A");
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m.put("b", "B");
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m.put("c", "C");
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equal(m, "{a=A, b=B, c=C}");
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equal(m.headMap("b"), "{a=A}");
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equal(m.tailMap("b"), "{b=B, c=C}");
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equal(m.headMap(null), "{}");
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equal(m.tailMap(null), "{a=A, b=B, c=C}");
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m.put(null, "NULL");
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equal(m, "{null=NULL, a=A, b=B, c=C}");
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equal(m.headMap("b"), "{null=NULL, a=A}");
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equal(m.tailMap("b"), "{b=B, c=C}");
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equal(m.headMap(null), "{}");
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equal(m.tailMap(null), "{null=NULL, a=A, b=B, c=C}");
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m = new TreeMap(nullHigh);
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m.put("a", "A");
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m.put("b", "B");
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m.put("c", "C");
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equal(m, "{a=A, b=B, c=C}");
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equal(m.headMap("b"), "{a=A}");
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equal(m.tailMap("b"), "{b=B, c=C}");
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equal(m.headMap(null), "{a=A, b=B, c=C}");
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equal(m.tailMap(null), "{}");
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m.put(null, "NULL");
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equal(m, "{a=A, b=B, c=C, null=NULL}");
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equal(m.headMap("b"), "{a=A}");
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equal(m.tailMap("b"), "{b=B, c=C, null=NULL}");
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equal(m.headMap(null), "{a=A, b=B, c=C}");
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equal(m.tailMap(null), "{null=NULL}");
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}
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//--------------------- Infrastructure ---------------------------
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static volatile int passed = 0, failed = 0;
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static void pass() {passed++;}
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static void fail() {failed++; Thread.dumpStack();}
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static void fail(String msg) {System.out.println(msg); fail();}
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static void unexpected(Throwable t) {failed++; t.printStackTrace();}
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static void check(boolean cond) {if (cond) pass(); else fail();}
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static void equal(Object x, Object y) {
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if (x == null ? y == null : x.equals(y)) pass();
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else fail(x + " not equal to " + y);}
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public static void main(String[] args) throws Throwable {
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try {realMain(args);} catch (Throwable t) {unexpected(t);}
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System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
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if (failed > 0) throw new AssertionError("Some tests failed");}
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}
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