Mercurial > hg > blitz_stable
annotate src/EDU/oswego/cs/dl/util/concurrent/SyncList.java @ 28:bc579f24eaf5
Added tag Version 2.1 for changeset 511648fa4d64
author | Dan Creswell <dan.creswell@gmail.com> |
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date | Mon, 04 Jan 2010 13:01:11 +0000 |
parents | 3dc0c5604566 |
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0
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1 /* |
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2 File: SyncList.java |
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3 |
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4 Originally written by Doug Lea and released into the public domain. |
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5 This may be used for any purposes whatsoever without acknowledgment. |
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6 Thanks for the assistance and support of Sun Microsystems Labs, |
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7 and everyone contributing, testing, and using this code. |
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8 |
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9 History: |
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10 Date Who What |
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11 1Aug1998 dl Create public version |
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12 */ |
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13 |
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14 package EDU.oswego.cs.dl.util.concurrent; |
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15 import java.util.*; |
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16 |
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17 /** |
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18 * SyncLists wrap Sync-based control around java.util.Lists. |
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19 * They support the following additional reader operations over |
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20 * SyncCollection: hashCode, equals, get, indexOf, lastIndexOf, |
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21 * subList. They support additional writer operations remove(int), |
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22 * set(int), add(int), addAll(int). The corresponding listIterators |
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23 * and are similarly extended. |
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24 * <p>[<a href="http://gee.cs.oswego.edu/dl/classes/EDU/oswego/cs/dl/util/concurrent/intro.html"> Introduction to this package. </a>] |
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25 * @see SyncCollection |
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26 **/ |
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27 |
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28 |
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29 public class SyncList extends SyncCollection implements List { |
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30 |
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31 /** |
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32 * Create a new SyncList protecting the given collection, |
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33 * and using the given sync to control both reader and writer methods. |
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34 * Common, reasonable choices for the sync argument include |
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35 * Mutex, ReentrantLock, and Semaphores initialized to 1. |
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36 **/ |
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37 public SyncList(List list, Sync sync) { |
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38 super (list, sync); |
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39 } |
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40 |
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41 /** |
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42 * Create a new SyncList protecting the given list, |
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43 * and using the given ReadWriteLock to control reader and writer methods. |
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44 **/ |
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45 public SyncList(List list, ReadWriteLock rwl) { |
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46 super (list, rwl.readLock(), rwl.writeLock()); |
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47 } |
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48 |
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49 /** |
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50 * Create a new SyncList protecting the given list, |
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51 * and using the given pair of locks to control reader and writer methods. |
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52 **/ |
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53 public SyncList(List list, Sync readLock, Sync writeLock) { |
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54 super(list, readLock, writeLock); |
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55 } |
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56 |
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57 |
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58 protected List baseList() { |
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59 return (List)c_; |
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60 } |
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61 |
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62 |
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63 public int hashCode() { |
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64 boolean wasInterrupted = beforeRead(); |
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65 try { |
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66 return c_.hashCode(); |
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67 } |
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68 finally { |
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69 afterRead(wasInterrupted); |
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70 } |
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71 } |
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72 |
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73 public boolean equals(Object o) { |
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74 boolean wasInterrupted = beforeRead(); |
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75 try { |
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76 return c_.equals(o); |
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77 } |
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78 finally { |
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79 afterRead(wasInterrupted); |
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80 } |
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81 } |
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82 |
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83 public Object get(int index) { |
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84 boolean wasInterrupted = beforeRead(); |
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85 try { |
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86 return baseList().get(index); |
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87 } |
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88 finally { |
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89 afterRead(wasInterrupted); |
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90 } |
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91 } |
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92 |
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93 public int indexOf(Object o) { |
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94 boolean wasInterrupted = beforeRead(); |
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95 try { |
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96 return baseList().indexOf(o); |
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97 } |
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98 finally { |
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99 afterRead(wasInterrupted); |
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100 } |
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101 } |
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102 |
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103 |
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104 public int lastIndexOf(Object o) { |
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105 boolean wasInterrupted = beforeRead(); |
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106 try { |
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107 return baseList().lastIndexOf(o); |
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108 } |
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109 finally { |
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110 afterRead(wasInterrupted); |
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111 } |
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112 } |
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113 |
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114 |
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115 |
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116 public List subList(int fromIndex, int toIndex) { |
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117 boolean wasInterrupted = beforeRead(); |
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118 try { |
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119 return new SyncList(baseList().subList(fromIndex, toIndex), rd_, wr_); |
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120 } |
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121 finally { |
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122 afterRead(wasInterrupted); |
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123 } |
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124 } |
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125 |
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126 public Object set(int index, Object o) { |
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127 try { |
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128 wr_.acquire(); |
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129 try { |
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130 return baseList().set(index, o); |
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131 } |
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132 finally { |
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133 wr_.release(); |
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134 } |
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135 } |
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136 catch (InterruptedException ex) { |
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137 Thread.currentThread().interrupt(); |
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138 throw new UnsupportedOperationException(); |
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139 } |
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140 } |
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141 |
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142 |
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143 public Object remove(int index) { |
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144 try { |
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145 wr_.acquire(); |
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146 try { |
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147 return baseList().remove(index); |
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148 } |
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149 finally { |
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150 wr_.release(); |
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151 } |
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152 } |
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153 catch (InterruptedException ex) { |
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154 Thread.currentThread().interrupt(); |
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155 throw new UnsupportedOperationException(); |
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156 } |
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157 } |
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158 |
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159 public void add(int index, Object o) { |
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160 try { |
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161 wr_.acquire(); |
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162 try { |
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163 baseList().add(index, o); |
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164 } |
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165 finally { |
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166 wr_.release(); |
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167 } |
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168 } |
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169 catch (InterruptedException ex) { |
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170 Thread.currentThread().interrupt(); |
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171 throw new UnsupportedOperationException(); |
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172 } |
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173 } |
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174 |
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175 public boolean addAll(int index, Collection coll) { |
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176 try { |
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177 wr_.acquire(); |
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178 try { |
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179 return baseList().addAll(index, coll); |
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180 } |
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181 finally { |
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182 wr_.release(); |
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183 } |
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184 } |
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185 catch (InterruptedException ex) { |
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186 Thread.currentThread().interrupt(); |
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187 throw new UnsupportedOperationException(); |
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188 } |
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189 } |
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190 |
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191 public ListIterator unprotectedListIterator() { |
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192 boolean wasInterrupted = beforeRead(); |
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193 try { |
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194 return baseList().listIterator(); |
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195 } |
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196 finally { |
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197 afterRead(wasInterrupted); |
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198 } |
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199 } |
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200 |
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201 public ListIterator listIterator() { |
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202 boolean wasInterrupted = beforeRead(); |
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203 try { |
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204 return new SyncCollectionListIterator(baseList().listIterator()); |
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205 } |
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206 finally { |
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207 afterRead(wasInterrupted); |
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208 } |
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209 } |
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210 |
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211 public ListIterator unprotectedListIterator(int index) { |
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212 boolean wasInterrupted = beforeRead(); |
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213 try { |
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214 return baseList().listIterator(index); |
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215 } |
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216 finally { |
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217 afterRead(wasInterrupted); |
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218 } |
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219 } |
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220 |
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221 public ListIterator listIterator(int index) { |
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222 boolean wasInterrupted = beforeRead(); |
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223 try { |
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224 return new SyncCollectionListIterator(baseList().listIterator(index)); |
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225 } |
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226 finally { |
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227 afterRead(wasInterrupted); |
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228 } |
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229 } |
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230 |
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231 |
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232 public class SyncCollectionListIterator extends SyncCollectionIterator implements ListIterator { |
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233 |
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234 SyncCollectionListIterator(Iterator baseIterator) { |
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235 super(baseIterator); |
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236 } |
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237 |
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238 protected ListIterator baseListIterator() { |
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239 return (ListIterator)(baseIterator_); |
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240 } |
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241 |
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242 public boolean hasPrevious() { |
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243 boolean wasInterrupted = beforeRead(); |
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244 try { |
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245 return baseListIterator().hasPrevious(); |
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246 } |
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247 finally { |
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248 afterRead(wasInterrupted); |
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249 } |
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250 } |
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251 |
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252 public Object previous() { |
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253 boolean wasInterrupted = beforeRead(); |
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254 try { |
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255 return baseListIterator().previous(); |
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256 } |
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257 finally { |
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258 afterRead(wasInterrupted); |
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259 } |
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260 } |
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261 |
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262 public int nextIndex() { |
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263 boolean wasInterrupted = beforeRead(); |
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264 try { |
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265 return baseListIterator().nextIndex(); |
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266 } |
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267 finally { |
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268 afterRead(wasInterrupted); |
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269 } |
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270 } |
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271 |
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272 |
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273 public int previousIndex() { |
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274 boolean wasInterrupted = beforeRead(); |
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275 try { |
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276 return baseListIterator().previousIndex(); |
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277 } |
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278 finally { |
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279 afterRead(wasInterrupted); |
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280 } |
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281 } |
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282 |
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283 |
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284 public void set(Object o) { |
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285 try { |
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286 wr_.acquire(); |
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287 try { |
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288 baseListIterator().set(o); |
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289 } |
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290 finally { |
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291 wr_.release(); |
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292 } |
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293 } |
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294 catch (InterruptedException ex) { |
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295 Thread.currentThread().interrupt(); |
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296 throw new UnsupportedOperationException(); |
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297 } |
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298 } |
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299 |
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300 public void add(Object o) { |
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301 try { |
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302 wr_.acquire(); |
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303 try { |
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304 baseListIterator().add(o); |
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305 } |
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306 finally { |
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307 wr_.release(); |
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308 } |
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309 } |
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310 catch (InterruptedException ex) { |
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311 Thread.currentThread().interrupt(); |
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312 throw new UnsupportedOperationException(); |
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313 } |
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314 } |
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315 |
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316 |
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317 } |
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318 |
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319 } |
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320 |
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321 |