Mercurial > hg > truffle
annotate graal/com.oracle.max.base/src/com/sun/max/collect/LinkedIdentityHashMap.java @ 4240:394424b7df1a
Disabled certain DaCapo tests for fastdebug testing in the gate.
author | Doug Simon <doug.simon@oracle.com> |
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date | Fri, 06 Jan 2012 18:35:39 +0100 |
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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 import com.sun.max.*; |
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28 |
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29 /** |
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30 */ |
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31 public class LinkedIdentityHashMap<K, V> extends IdentityHashMap<K, V> implements Iterable<K> { |
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32 |
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33 /** |
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34 * |
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35 */ |
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36 private static final long serialVersionUID = -8084814503481369783L; |
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37 private final LinkedList<K> order = new LinkedList<>(); |
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38 |
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39 public LinkedIdentityHashMap() { |
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40 } |
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41 |
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42 public LinkedIdentityHashMap(int expectedMaxSize) { |
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43 super(expectedMaxSize); |
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44 } |
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45 |
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46 @Override |
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47 public V put(K key, V value) { |
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48 final V oldValue = super.put(key, value); |
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49 if (oldValue == null) { |
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50 if (value != null) { |
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51 order.add(key); |
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52 } |
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53 } else { |
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54 if (value == null) { |
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55 order.remove(key); |
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56 } |
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57 } |
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58 return oldValue; |
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59 } |
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60 |
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61 public Iterator<K> iterator() { |
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62 return order.iterator(); |
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63 } |
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64 |
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65 public K first() { |
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66 return order.getFirst(); |
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67 } |
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68 |
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69 public K last() { |
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70 return order.getLast(); |
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71 } |
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72 |
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73 @Override |
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74 public boolean equals(Object other) { |
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75 if (other instanceof LinkedIdentityHashMap) { |
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76 final LinkedIdentityHashMap map = (LinkedIdentityHashMap) other; |
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77 if (order.size() != map.order.size()) { |
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78 return false; |
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79 } |
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80 final Iterator iterator = map.order.iterator(); |
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81 for (K key : order) { |
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82 if (key != iterator.next() || !get(key).equals(map.get(key))) { |
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83 return false; |
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84 } |
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85 } |
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86 return true; |
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87 } |
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88 return false; |
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89 } |
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90 |
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91 @Override |
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92 public int hashCode() { |
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93 return order.hashCode(); |
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94 } |
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95 |
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96 @Override |
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97 public LinkedIdentityHashMap<K, V> clone() { |
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98 return Utils.cast(super.clone()); |
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99 } |
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100 |
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101 public Collection<K> toCollection() { |
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102 return keySet(); |
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103 } |
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104 } |