Mercurial > hg > truffle
annotate graal/com.oracle.max.base/src/com/sun/max/collect/IdentityHashMapping.java @ 3733:e233f5660da4
Added Java files from Maxine project.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Sat, 17 Dec 2011 19:59:18 +0100 |
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children | bc8527f3071c |
rev | line source |
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Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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1 /* |
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2 * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 */ |
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23 package com.sun.max.collect; |
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24 |
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25 import java.util.*; |
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26 |
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27 /** |
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28 */ |
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29 public class IdentityHashMapping<K, V> implements Mapping<K, V> { |
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30 |
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31 private final Map<K, V> delegate; |
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32 |
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33 public IdentityHashMapping() { |
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34 delegate = new IdentityHashMap<K, V>(); |
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35 } |
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36 |
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37 public IdentityHashMapping(int expectedMaxSize) { |
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38 delegate = new IdentityHashMap<K, V>(expectedMaxSize); |
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39 } |
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40 |
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41 public synchronized V put(K key, V value) { |
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42 return delegate.put(key, value); |
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43 } |
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44 |
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45 public synchronized V get(K key) { |
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46 final V value = delegate.get(key); |
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47 return value; |
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48 } |
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49 |
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50 public synchronized boolean containsKey(K key) { |
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51 return delegate.containsKey(key); |
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52 } |
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53 |
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54 public int length() { |
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55 return delegate.size(); |
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56 } |
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57 |
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58 public void clear() { |
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59 delegate.clear(); |
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60 } |
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61 |
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62 public V remove(K key) { |
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63 return delegate.remove(key); |
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64 } |
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65 |
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66 public IterableWithLength<K> keys() { |
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67 return new IterableWithLength<K>() { |
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68 |
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69 public int size() { |
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70 return delegate.size(); |
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71 } |
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72 |
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73 public Iterator<K> iterator() { |
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74 return delegate.keySet().iterator(); |
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75 } |
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76 }; |
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77 } |
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78 |
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79 public IterableWithLength<V> values() { |
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80 return new IterableWithLength<V>() { |
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81 |
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82 public int size() { |
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83 return delegate.size(); |
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84 } |
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85 |
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86 public Iterator<V> iterator() { |
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87 return delegate.values().iterator(); |
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88 } |
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89 }; |
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90 } |
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91 |
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92 } |