util/Map/Get.java

/*
 * Copyright (c) 2005, 2012, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

/*
 * @test
 * @bug 6306829
 * @summary Verify assertions in get() javadocs
 * @author Martin Buchholz
 */

import java.util.HashMap;
import java.util.Hashtable;
import java.util.IdentityHashMap;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Objects;
import java.util.SortedMap;
import java.util.TreeMap;
import java.util.WeakHashMap;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.ConcurrentSkipListMap;

public class Get {

    private static void realMain(String[] args) throws Throwable {
        testMap(new Hashtable<Character,Boolean>());
        testMap(new HashMap<Character,Boolean>());
        testMap(new IdentityHashMap<Character,Boolean>());
        testMap(new LinkedHashMap<Character,Boolean>());
        testMap(new ConcurrentHashMap<Character,Boolean>());
        testMap(new WeakHashMap<Character,Boolean>());
        testMap(new TreeMap<Character,Boolean>());
        testMap(new ConcurrentSkipListMap<Character,Boolean>());
    }

    private static void put(Map<Character,Boolean> m,
                            Character key, Boolean value,
                            Boolean oldValue) {
        if (oldValue != null) {
            check("containsValue(oldValue)", m.containsValue(oldValue));
            check("values.contains(oldValue)", m.values().contains(oldValue));
        }
        equal(m.put(key, value), oldValue);
        equal(m.get(key), value);
        check("containsKey", m.containsKey(key));
        check("keySet.contains", m.keySet().contains(key));
        check("containsValue", m.containsValue(value));
        check("values.contains",  m.values().contains(value));
        check("!isEmpty", ! m.isEmpty());
    }

    private static void testMap(Map<Character,Boolean> m) {
        // We verify following assertions in get(Object) method javadocs
        boolean permitsNullKeys = (! (m instanceof ConcurrentMap ||
                                      m instanceof Hashtable     ||
                                      m instanceof SortedMap));
        boolean permitsNullValues = (! (m instanceof ConcurrentMap ||
                                        m instanceof Hashtable));
        boolean usesIdentity = m instanceof IdentityHashMap;

        System.err.println(m.getClass());
        put(m, 'A', true,  null);
        put(m, 'A', false, true);       // Guaranteed identical by JLS
        put(m, 'B', true,  null);
        put(m, new Character('A'), false, usesIdentity ? null : false);
        if (permitsNullKeys) {
            try {
                put(m, null, true,  null);
                put(m, null, false, true);
            }
            catch (Throwable t) { unexpected(m.getClass().getName(), t); }
        } else {
            try { m.get(null); fail(m.getClass().getName() + " did not reject null key"); }
            catch (NullPointerException e) {}
            catch (Throwable t) { unexpected(m.getClass().getName(), t); }

            try { m.put(null, true); fail(m.getClass().getName() + " did not reject null key"); }
            catch (NullPointerException e) {}
            catch (Throwable t) { unexpected(m.getClass().getName(), t); }
        }
        if (permitsNullValues) {
            try {
                put(m, 'C', null, null);
                put(m, 'C', true, null);
                put(m, 'C', null, true);
            }
            catch (Throwable t) { unexpected(m.getClass().getName(), t); }
        } else {
            try { m.put('A', null); fail(m.getClass().getName() + " did not reject null key"); }
            catch (NullPointerException e) {}
            catch (Throwable t) { unexpected(m.getClass().getName(), t); }

            try { m.put('C', null); fail(m.getClass().getName() + " did not reject null key"); }
            catch (NullPointerException e) {}
            catch (Throwable t) { unexpected(m.getClass().getName(), t); }
        }
    }

    //--------------------- Infrastructure ---------------------------
    static volatile int passed = 0, failed = 0;
    static void pass() { passed++; }
    static void fail() { failed++; new Error("Failure").printStackTrace(System.err); }
    static void fail(String msg) { failed++; new Error("Failure: " + msg).printStackTrace(System.err); }
    static void unexpected(String msg, Throwable t) { System.err.println("Unexpected: " + msg); unexpected(t); }
    static void unexpected(Throwable t) { failed++; t.printStackTrace(System.err); }
    static void check(boolean cond) { if (cond) pass(); else fail(); }
    static void check(String desc, boolean cond) { if (cond) pass(); else fail(desc); }
    static void equal(Object x, Object y) {
        if (Objects.equals(x,y)) pass(); else fail(x + " not equal to " + y);
    }

    public static void main(String[] args) throws Throwable {
        try { realMain(args); } catch (Throwable t) { unexpected(t); }

        System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
        if (failed > 0) throw new Error("Some tests failed");
    }
}
Revision:	1.5
Committed:	Sun Aug 18 01:05:34 2019 UTC (4 years, 9 months ago) by jsr166
Branch:	MAIN
CVS Tags:	HEAD
Changes since 1.4:	+2 -2 lines
Log Message:	fix more errorprone [UnnecessaryParentheses] warnings
#	Content
1	/*
2	* Copyright (c) 2005, 2012, 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 6306829
27	* @summary Verify assertions in get() javadocs
28	* @author Martin Buchholz
29	*/
30
31	import java.util.HashMap;
32	import java.util.Hashtable;
33	import java.util.IdentityHashMap;
34	import java.util.LinkedHashMap;
35	import java.util.Map;
36	import java.util.Objects;
37	import java.util.SortedMap;
38	import java.util.TreeMap;
39	import java.util.WeakHashMap;
40	import java.util.concurrent.ConcurrentHashMap;
41	import java.util.concurrent.ConcurrentMap;
42	import java.util.concurrent.ConcurrentSkipListMap;
43
44	public class Get {
45
46	private static void realMain(String[] args) throws Throwable {
47	testMap(new Hashtable<Character,Boolean>());
48	testMap(new HashMap<Character,Boolean>());
49	testMap(new IdentityHashMap<Character,Boolean>());
50	testMap(new LinkedHashMap<Character,Boolean>());
51	testMap(new ConcurrentHashMap<Character,Boolean>());
52	testMap(new WeakHashMap<Character,Boolean>());
53	testMap(new TreeMap<Character,Boolean>());
54	testMap(new ConcurrentSkipListMap<Character,Boolean>());
55	}
56
57	private static void put(Map<Character,Boolean> m,
58	Character key, Boolean value,
59	Boolean oldValue) {
60	if (oldValue != null) {
61	check("containsValue(oldValue)", m.containsValue(oldValue));
62	check("values.contains(oldValue)", m.values().contains(oldValue));
63	}
64	equal(m.put(key, value), oldValue);
65	equal(m.get(key), value);
66	check("containsKey", m.containsKey(key));
67	check("keySet.contains", m.keySet().contains(key));
68	check("containsValue", m.containsValue(value));
69	check("values.contains", m.values().contains(value));
70	check("!isEmpty", ! m.isEmpty());
71	}
72
73	private static void testMap(Map<Character,Boolean> m) {
74	// We verify following assertions in get(Object) method javadocs
75	boolean permitsNullKeys = (! (m instanceof ConcurrentMap \|\|
76	m instanceof Hashtable \|\|
77	m instanceof SortedMap));
78	boolean permitsNullValues = (! (m instanceof ConcurrentMap \|\|
79	m instanceof Hashtable));
80	boolean usesIdentity = m instanceof IdentityHashMap;
81
82	System.err.println(m.getClass());
83	put(m, 'A', true, null);
84	put(m, 'A', false, true); // Guaranteed identical by JLS
85	put(m, 'B', true, null);
86	put(m, new Character('A'), false, usesIdentity ? null : false);
87	if (permitsNullKeys) {
88	try {
89	put(m, null, true, null);
90	put(m, null, false, true);
91	}
92	catch (Throwable t) { unexpected(m.getClass().getName(), t); }
93	} else {
94	try { m.get(null); fail(m.getClass().getName() + " did not reject null key"); }
95	catch (NullPointerException e) {}
96	catch (Throwable t) { unexpected(m.getClass().getName(), t); }
97
98	try { m.put(null, true); fail(m.getClass().getName() + " did not reject null key"); }
99	catch (NullPointerException e) {}
100	catch (Throwable t) { unexpected(m.getClass().getName(), t); }
101	}
102	if (permitsNullValues) {
103	try {
104	put(m, 'C', null, null);
105	put(m, 'C', true, null);
106	put(m, 'C', null, true);
107	}
108	catch (Throwable t) { unexpected(m.getClass().getName(), t); }
109	} else {
110	try { m.put('A', null); fail(m.getClass().getName() + " did not reject null key"); }
111	catch (NullPointerException e) {}
112	catch (Throwable t) { unexpected(m.getClass().getName(), t); }
113
114	try { m.put('C', null); fail(m.getClass().getName() + " did not reject null key"); }
115	catch (NullPointerException e) {}
116	catch (Throwable t) { unexpected(m.getClass().getName(), t); }
117	}
118	}
119
120	//--------------------- Infrastructure ---------------------------
121	static volatile int passed = 0, failed = 0;
122	static void pass() { passed++; }
123	static void fail() { failed++; new Error("Failure").printStackTrace(System.err); }
124	static void fail(String msg) { failed++; new Error("Failure: " + msg).printStackTrace(System.err); }
125	static void unexpected(String msg, Throwable t) { System.err.println("Unexpected: " + msg); unexpected(t); }
126	static void unexpected(Throwable t) { failed++; t.printStackTrace(System.err); }
127	static void check(boolean cond) { if (cond) pass(); else fail(); }
128	static void check(String desc, boolean cond) { if (cond) pass(); else fail(desc); }
129	static void equal(Object x, Object y) {
130	if (Objects.equals(x,y)) pass(); else fail(x + " not equal to " + y);
131	}
132
133	public static void main(String[] args) throws Throwable {
134	try { realMain(args); } catch (Throwable t) { unexpected(t); }
135
136	System.out.printf("%nPassed = %d, failed = %d%n%n", passed, failed);
137	if (failed > 0) throw new Error("Some tests failed");
138	}
139	}