Mercurial > hg > truffle

comparison graal/com.oracle.max.base/src/com/sun/max/collect/IdentityHashMapping.java @ 3733:e233f5660da4

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Added Java files from Maxine project.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Sat, 17 Dec 2011 19:59:18 +0100
parents
children bc8527f3071c
comparison
equal deleted inserted replaced
3732:3e2e8b8abdaf 3733:e233f5660da4
1 /*
2 * Copyright (c) 2007, 2011, 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 package com.sun.max.collect;
24
25 import java.util.*;
26
27 /**
28 */
29 public class IdentityHashMapping<K, V> implements Mapping<K, V> {
30
31 private final Map<K, V> delegate;
32
33 public IdentityHashMapping() {
34 delegate = new IdentityHashMap<K, V>();
35 }
36
37 public IdentityHashMapping(int expectedMaxSize) {
38 delegate = new IdentityHashMap<K, V>(expectedMaxSize);
39 }
40
41 public synchronized V put(K key, V value) {
42 return delegate.put(key, value);
43 }
44
45 public synchronized V get(K key) {
46 final V value = delegate.get(key);
47 return value;
48 }
49
50 public synchronized boolean containsKey(K key) {
51 return delegate.containsKey(key);
52 }
53
54 public int length() {
55 return delegate.size();
56 }
57
58 public void clear() {
59 delegate.clear();
60 }
61
62 public V remove(K key) {
63 return delegate.remove(key);
64 }
65
66 public IterableWithLength<K> keys() {
67 return new IterableWithLength<K>() {
68
69 public int size() {
70 return delegate.size();
71 }
72
73 public Iterator<K> iterator() {
74 return delegate.keySet().iterator();
75 }
76 };
77 }
78
79 public IterableWithLength<V> values() {
80 return new IterableWithLength<V>() {
81
82 public int size() {
83 return delegate.size();
84 }
85
86 public Iterator<V> iterator() {
87 return delegate.values().iterator();
88 }
89 };
90 }
91
92 }