Mercurial > hg > truffle
annotate graal/com.oracle.max.base/src/com/sun/max/collect/PoolSet.java @ 4184:fa6b78681c54
Added copyright check to the gate.
author | Doug Simon <doug.simon@oracle.com> |
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date | Tue, 03 Jan 2012 12:37:31 +0100 |
parents | bc8527f3071c |
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rev | line source |
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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 * A representation for a subset of objects in a {@linkplain Pool pool}. The recommended mechanism for creating a pool |
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29 * set is by calling {@link #noneOf(Pool)}, {@link #allOf(Pool)}, {@link #of(Pool, PoolObject[])} or |
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30 * {@link #of(Pool, PoolObject, PoolObject...)}. These methods ensure that the most efficient and compact pool set |
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31 * object is created based on the length of the underlying pool. |
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32 */ |
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33 public abstract class PoolSet<T extends PoolObject> implements Cloneable, Iterable<T> { |
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34 |
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35 protected final Pool<T> pool; |
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36 |
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37 protected PoolSet(Pool<T> pool) { |
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38 this.pool = pool; |
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39 } |
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40 |
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41 /** |
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42 * Gets the number of objects in this set. |
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43 */ |
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44 public abstract int size(); |
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45 |
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46 /** |
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47 * Adds a value to this set. The value must be in the {@linkplain #pool() underlying pool}. |
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48 */ |
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49 public abstract void add(T value); |
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50 |
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51 /** |
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52 * Determines if a given value is in this set. The value must be in the {@linkplain #pool() underlying pool}. |
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53 */ |
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54 public abstract boolean contains(T value); |
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55 |
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56 /** |
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57 * Determines if this set contains all the values present in a given set. |
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58 */ |
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59 public boolean containsAll(PoolSet<T> others) { |
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60 for (T value : others) { |
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61 if (!contains(value)) { |
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62 return false; |
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63 } |
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64 } |
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65 return true; |
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66 } |
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67 |
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68 /** |
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69 * Removes a given value from this set. The value must be in the {@linkplain #pool() underlying pool}. |
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70 * |
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71 * @return true if this set contained {@code value} |
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72 */ |
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73 public abstract boolean remove(T value); |
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74 |
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75 /** |
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76 * Removes an arbitrary value from this set. The value must be in the {@linkplain #pool() underlying pool}. |
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77 * |
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78 * @throws NoSuchElementException if this set is empty |
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79 */ |
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80 public abstract T removeOne() throws NoSuchElementException; |
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81 |
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82 /** |
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83 * Gets the pool containing the values that are in or may be added to this set. |
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84 */ |
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85 public Pool<T> pool() { |
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86 return pool; |
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87 } |
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88 |
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89 /** |
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90 * Clears all entries from this set. |
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91 */ |
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92 public abstract void clear(); |
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93 |
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94 /** |
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95 * Adds all entries from the pool to this set. |
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96 * |
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97 * @return this set |
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98 */ |
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99 public abstract PoolSet<T> addAll(); |
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100 |
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101 /** |
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102 * Adds all entries from another pool set to this set. |
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103 */ |
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104 public void or(PoolSet<T> others) { |
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105 for (T element : others) { |
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106 add(element); |
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107 } |
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108 } |
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109 |
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110 /** |
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111 * Removes all the entries from this set that are not in a given set. |
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112 */ |
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113 public abstract void and(PoolSet<T> others); |
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114 |
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115 /** |
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116 * Creates a copy of this pool set. The copy has the same pool object as this pool set. |
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117 */ |
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118 @Override |
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119 public abstract PoolSet<T> clone(); |
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120 |
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121 /** |
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122 * @return true if there are no values in this set |
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123 */ |
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124 public abstract boolean isEmpty(); |
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125 |
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126 /** |
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127 * @see #toString(PoolSet) |
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128 */ |
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129 @Override |
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130 public String toString() { |
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131 return toString(this); |
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132 } |
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133 |
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134 public T[] toArray(T[] a) { |
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135 assert a.length == size(); |
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136 int i = 0; |
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137 for (T element : this) { |
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138 a[i++] = element; |
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139 } |
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140 return a; |
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141 } |
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142 |
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143 /** |
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144 * Creates an empty pool set for a given pool. |
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145 * |
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146 * @param <T> the type of objects in {@code pool} |
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147 * @param pool the pool of objects that the returned set provides a view upon |
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148 * @return an empty pool set that can be subsequently modified to contain objects from {@code pool} |
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149 */ |
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150 public static <T extends PoolObject> PoolSet<T> noneOf(Pool<T> pool) { |
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151 if (pool.length() <= PoolSet64.MAX_POOL_SIZE) { |
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152 return new PoolSet64<>(pool); |
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153 } |
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154 if (pool.length() <= PoolSet128.MAX_POOL_SIZE) { |
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155 return new PoolSet128<>(pool); |
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156 } |
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157 return new PoolBitSet<>(pool); |
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158 } |
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159 |
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160 /** |
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161 * Creates a pool set initially containing all the objects in a given pool. |
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162 * |
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163 * @param <T> the type of objects in {@code pool} |
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164 * @param pool the pool of objects that the returned set provides a view upon |
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165 * @return a pool set containing all the objects in {@code pool} |
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166 */ |
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167 public static <T extends PoolObject> PoolSet<T> allOf(Pool<T> pool) { |
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168 return noneOf(pool).addAll(); |
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169 } |
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170 |
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171 /** |
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172 * Creates a pool set initially containing one or more objects from a given pool. |
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173 * |
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174 * @param <T> the type of objects in {@code pool} |
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175 * @param <S> the type of objects that can be added to the pool by this method |
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176 * @param pool the pool of objects that the returned set provides a view upon |
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177 * @param first an object that will be in the returned set |
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178 * @param rest zero or more objects that will be in the returned set |
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179 * @return a pool set containing {@code first} and all the objects in {@code rest} |
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180 */ |
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181 @SafeVarargs |
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182 public static <T extends PoolObject, S extends T> PoolSet<T> of(Pool<T> pool, S first, S... rest) { |
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183 final PoolSet<T> poolSet = noneOf(pool); |
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184 poolSet.add(first); |
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185 for (T object : rest) { |
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186 poolSet.add(object); |
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187 } |
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188 return poolSet; |
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189 } |
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190 |
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191 /** |
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192 * Creates a pool set initially containing all the objects specified by a given array that are also in a given pool. |
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193 * |
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194 * @param <T> the type of objects in {@code pool} |
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195 * @param <S> the type of objects that can be added to the pool by this method |
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196 * @param pool the pool of objects that the returned set provides a view upon |
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197 * @param objects zero or more objects that will be in the returned set |
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198 * @return a pool set containing all the objects in {@code objects} |
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199 */ |
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200 public static <T extends PoolObject, S extends T> PoolSet<T> of(Pool<T> pool, S[] objects) { |
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201 final PoolSet<T> poolSet = noneOf(pool); |
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202 for (T object : objects) { |
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203 poolSet.add(object); |
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204 } |
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205 return poolSet; |
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206 } |
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207 |
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208 /** |
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209 * Adds all objects returned by a given iterable's iterator to a given pool set. |
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210 * |
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211 * @param <T> the type of objects in {@code poolSet} |
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212 * @param poolSet the set to which the objects are added |
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213 * @param elements a collection of objects |
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214 */ |
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215 public static <T extends PoolObject> void addAll(PoolSet<T> poolSet, Iterable<T> elements) { |
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216 for (T element : elements) { |
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217 poolSet.add(element); |
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218 } |
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219 } |
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220 |
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221 public static <T extends PoolObject> boolean match(PoolSet<T> poolSet1, PoolSet<T> poolSet2) { |
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222 if (!poolSet1.pool().equals(poolSet2.pool())) { |
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223 return false; |
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224 } |
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225 final Iterator<T> iterator1 = poolSet1.iterator(); |
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226 final Iterator<T> iterator2 = poolSet2.iterator(); |
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227 while (iterator1.hasNext() && iterator2.hasNext()) { |
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228 if (!iterator1.next().equals(iterator2.next())) { |
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229 return false; |
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230 } |
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231 } |
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232 return iterator1.hasNext() == iterator2.hasNext(); |
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233 } |
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234 |
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235 /** |
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236 * Gets a string representation of a given pool set. The returned string is delimited by "{" and "}". For each |
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237 * object in the given pool set, its {@code toString()} representation is added to the string followed by ", " if it |
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238 * is not the last object in the set. |
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239 * |
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240 * @param poolSet a pool set for which a string representation is required |
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241 */ |
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242 public static String toString(PoolSet poolSet) { |
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243 String s = "{"; |
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244 String delimiter = ""; |
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245 for (Object value : poolSet) { |
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246 s += delimiter + value; |
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247 delimiter = ", "; |
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248 } |
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249 s += "}"; |
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250 return s; |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
251 } |
e233f5660da4
Added Java files from Maxine project.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
diff
changeset
|
252 } |