Mercurial > hg > truffle
annotate graal/com.oracle.max.base/src/com/sun/max/collect/HashEntryChainedHashMapping.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 /** |
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26 * A chained hash table whose {@linkplain HashEntry entries} record the hash of the key. This can provide better |
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27 * performance improvement when the cost of computing the key's hash code is high. |
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28 */ |
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29 public class HashEntryChainedHashMapping<K, V> extends ChainedHashMapping<K, V> { |
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30 |
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31 public static class HashEntry<K, V> extends DefaultEntry<K, V> { |
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32 |
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33 final int hashOfKey; |
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34 |
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35 public HashEntry(int hashOfKey, K key, V value, Entry<K, V> next) { |
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36 super(key, value, next); |
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37 this.hashOfKey = hashOfKey; |
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38 } |
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39 } |
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40 |
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41 /** |
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42 * Creates a chained hash table whose entries record the hash of the key. |
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43 * |
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44 * @param equivalence |
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45 * the semantics of key comparison and hashing. If {@code null}, then {@link HashEquality} is used. |
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46 * @param initialCapacity |
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47 * the initial capacity of the table |
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48 */ |
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49 public HashEntryChainedHashMapping(HashEquivalence<K> equivalence, int initialCapacity) { |
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50 super(equivalence, initialCapacity); |
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51 } |
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52 |
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53 /** |
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54 * Creates a chained hash table with {@linkplain HashEquality equality} key semantics whose entries record the hash |
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55 * of the key. |
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56 * |
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57 * @param initialCapacity |
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58 * the initial capacity of the table |
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59 */ |
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60 public HashEntryChainedHashMapping(int initialCapacity) { |
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61 super(initialCapacity); |
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62 } |
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63 |
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64 /** |
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65 * Creates a chained hash table with an initial capacity of {@value ChainedHashMapping#DEFAULT_INITIAL_CAPACITY} |
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66 * whose entries record the hash of the key. |
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67 * |
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68 * @param equivalence |
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69 * the semantics of key comparison and hashing. If {@code null}, then {@link HashEquality} is used. |
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70 */ |
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71 public HashEntryChainedHashMapping(HashEquivalence<K> equivalence) { |
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72 super(equivalence); |
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73 } |
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74 |
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75 /** |
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76 * Creates a chained hash table with {@linkplain HashEquality equality} key semantics and an initial capacity of |
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77 * {@value ChainedHashMapping#DEFAULT_INITIAL_CAPACITY} whose entries record the hash of the key. |
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78 */ |
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79 public HashEntryChainedHashMapping() { |
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80 super(); |
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81 } |
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82 |
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83 @Override |
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84 protected Entry<K, V> createEntry(int hashOfKey, K key, V value, Entry<K, V> next) { |
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85 return new HashEntryChainedHashMapping.HashEntry<>(hashOfKey, key, value, next); |
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86 } |
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87 |
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88 @Override |
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89 protected boolean matches(Entry<K, V> entry, K key, int hashForKey) { |
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90 final K entryKey = entry.key(); |
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91 return entryKey == key || (hashForKey == ((HashEntryChainedHashMapping.HashEntry) entry).hashOfKey && key.equals(entryKey)); |
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92 } |
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93 } |