Mercurial > hg > Members > kono > jpf-core
annotate src/main/gov/nasa/jpf/vm/ChoiceGenerator.java @ 34:49be04cc6389 default tip java9-try
cyclic dependency ...
author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
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date | Tue, 19 Dec 2017 11:21:23 +0900 |
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1 /* |
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2 * Copyright (C) 2014, United States Government, as represented by the |
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3 * Administrator of the National Aeronautics and Space Administration. |
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4 * All rights reserved. |
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5 * |
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6 * The Java Pathfinder core (jpf-core) platform is licensed under the |
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7 * Apache License, Version 2.0 (the "License"); you may not use this file except |
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8 * in compliance with the License. You may obtain a copy of the License at |
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9 * |
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10 * http://www.apache.org/licenses/LICENSE-2.0. |
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11 * |
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12 * Unless required by applicable law or agreed to in writing, software |
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13 * distributed under the License is distributed on an "AS IS" BASIS, |
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14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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15 * See the License for the specific language governing permissions and |
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16 * limitations under the License. |
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17 */ |
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18 package gov.nasa.jpf.vm; |
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19 |
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20 import gov.nasa.jpf.util.ObjectList; |
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21 |
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22 import java.util.Comparator; |
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23 |
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24 /** |
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25 * generic interface for configurable choice generators |
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26 */ |
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27 public interface ChoiceGenerator<T> extends Cloneable { |
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28 |
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29 //--- the basic ChoiceGenerator interface, mostly used by SystemState |
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30 |
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31 T getNextChoice(); |
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32 |
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33 Class<T> getChoiceType(); |
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34 |
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35 boolean hasMoreChoices(); |
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36 |
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37 /** |
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38 * to be called before the first advance(). Can be used in implementors to |
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39 * initialize choices from context (similar to what listeners can do from |
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40 * choiceGeneratorSet() notifications) |
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41 */ |
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42 void setCurrent(); |
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43 |
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44 /** |
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45 * advance to the next choice. This is the only method that really |
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46 * advances our enumeration |
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47 */ |
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48 void advance(); |
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49 |
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50 void advance(int nChoices); |
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51 |
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52 void select(int nChoice); |
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53 |
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54 boolean isDone(); |
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55 |
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56 void setDone(); |
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57 |
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58 boolean isProcessed(); |
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59 |
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60 /** |
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61 * this has to reset the CG to its initial state, which includes resetting |
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62 * 'isDone' |
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63 */ |
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64 void reset(); |
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65 |
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66 int getTotalNumberOfChoices(); |
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67 |
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68 int getProcessedNumberOfChoices(); |
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69 |
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70 |
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71 // choice getters. Note that not all CGs need to support them since |
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72 // there is no requirement that CGs compute finite choice sets upon creation |
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73 |
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74 T getChoice(int i); |
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75 T[] getAllChoices(); |
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76 T[] getProcessedChoices(); |
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77 T[] getUnprocessedChoices(); |
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78 |
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79 ChoiceGenerator<?> getPreviousChoiceGenerator(); |
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80 |
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81 int getNumberOfParents(); |
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82 |
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83 /** |
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84 * turn the order of choices random (if it isn't already). Only |
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85 * drawback of this generic method (which might be a decorator |
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86 * factory) is that our type layer (e.g. IntChoiceGenerator) |
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87 * has to guarantee type safety. But hey - this is the first case where |
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88 * we can use covariant return types! |
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89 * |
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90 * NOTES: |
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91 * - this method may alter this ChoiceGenerator and return that or return |
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92 * a new "decorated" version. |
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93 * - random data can be read from the "Random random" field in this class. |
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94 */ |
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95 ChoiceGenerator<T> randomize(); |
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96 |
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97 ChoiceGenerator<?> clone() throws CloneNotSupportedException; |
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98 |
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99 ChoiceGenerator<?> deepClone() throws CloneNotSupportedException; |
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100 |
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101 String getId(); |
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102 |
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103 int getIdRef(); |
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104 |
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105 void setIdRef(int idRef); |
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106 |
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107 void setId(String id); |
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108 |
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109 boolean isSchedulingPoint(); |
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110 |
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111 //--- the getters and setters for the CG creation info |
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112 void setThreadInfo(ThreadInfo ti); |
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113 |
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114 ThreadInfo getThreadInfo(); |
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115 |
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116 void setInsn(Instruction insn); |
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117 |
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118 Instruction getInsn(); |
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119 |
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120 void setContext(ThreadInfo tiCreator); |
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121 |
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122 void setStateId (int stateId); |
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123 |
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124 int getStateId (); |
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125 |
0
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126 String getSourceLocation(); |
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127 |
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128 boolean supportsReordering(); |
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129 |
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130 /** |
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131 * reorder according to a user provided comparator |
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132 * @returns instance to reordered CG of same choice type, |
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133 * null if not supported by particular CG subclass |
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134 * |
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135 * Note: this should only be called before the first advance, since it |
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136 * can reset the CG enumeration status |
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137 */ |
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138 ChoiceGenerator<T> reorder (Comparator<T> comparator); |
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139 |
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140 void setPreviousChoiceGenerator(ChoiceGenerator<?> cg); |
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141 |
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142 |
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143 void setCascaded(); |
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144 |
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145 boolean isCascaded(); |
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146 |
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147 <T extends ChoiceGenerator<?>> T getPreviousChoiceGeneratorOfType(Class<T> cls); |
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148 |
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149 /** |
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150 * returns the prev CG if it was registered for the same insn |
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151 */ |
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152 ChoiceGenerator<?> getCascadedParent(); |
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153 |
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154 /** |
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155 * return array with all cascaded parents and this CG, in registration order |
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156 */ |
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157 ChoiceGenerator<?>[] getCascade(); |
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158 |
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159 /** |
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160 * return array with all parents and this CG, in registration order |
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161 */ |
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162 ChoiceGenerator<?>[] getAll(); |
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163 |
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164 /** |
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165 * return array with all CGs (including this one) of given 'cgType', in registration order |
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166 */ |
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167 <C extends ChoiceGenerator<?>> C[] getAllOfType(Class<C> cgType); |
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168 |
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169 |
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170 //--- the generic attribute API |
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171 boolean hasAttr(); |
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172 |
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173 boolean hasAttr(Class<?> attrType); |
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174 |
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175 /** |
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176 * this returns all of them - use either if you know there will be only |
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177 * one attribute at a time, or check/process result with ObjectList |
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178 */ |
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179 Object getAttr(); |
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180 |
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181 /** |
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182 * this replaces all of them - use only if you know |
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183 * - there will be only one attribute at a time |
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184 * - you obtained the value you set by a previous getXAttr() |
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185 * - you constructed a multi value list with ObjectList.createList() |
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186 */ |
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187 void setAttr(Object a); |
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188 |
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189 void addAttr(Object a); |
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190 |
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191 void removeAttr(Object a); |
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192 |
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193 void replaceAttr(Object oldAttr, Object newAttr); |
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194 |
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195 /** |
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196 * this only returns the first attr of this type, there can be more |
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197 * if you don't use client private types or the provided type is too general |
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198 */ |
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199 <A> A getAttr(Class<A> attrType); |
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200 |
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201 <A> A getNextAttr(Class<A> attrType, Object prev); |
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202 |
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203 ObjectList.Iterator attrIterator(); |
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204 |
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205 <A> ObjectList.TypedIterator<A> attrIterator(Class<A> attrType); |
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206 |
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207 } |