Mercurial > hg > Members > kono > jpf-core

annotate src/main/gov/nasa/jpf/vm/choice/TypedObjectChoice.java @ 34:49be04cc6389 default tip java9-try

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cyclic dependency ...
author Shinji KONO <kono@ie.u-ryukyu.ac.jp>
date Tue, 19 Dec 2017 11:21:23 +0900
parents cd7880ab73c7
children
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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
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19 package gov.nasa.jpf.vm.choice;
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20
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21 import gov.nasa.jpf.Config;
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22 import gov.nasa.jpf.vm.*;
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23
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24 import java.util.ArrayList;
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25
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26 /**
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27 * a choice generator that enumerates the set of all objects of a certain type. This
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28 * is a replacement for the old 'Verify.randomObject'
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29 */
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30 public class TypedObjectChoice extends ChoiceGeneratorBase<Integer> implements ReferenceChoiceGenerator {
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31
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32 // the requested object type
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33 protected String type;
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34
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35 // the object references
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36 protected int[] values;
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37
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38 // our enumeration state
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39 protected int count;
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40
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41
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42 public TypedObjectChoice (Config conf, String id) {
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43 super(id);
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44
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45 Heap heap = VM.getVM().getHeap();
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46
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47 type = conf.getString(id + ".type");
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48 if (type == null) {
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49 throw conf.exception("missing 'type' property for TypedObjectChoice " + id);
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50 }
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51
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52 ArrayList<ElementInfo> list = new ArrayList<ElementInfo>();
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53
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54 for ( ElementInfo ei : heap.liveObjects()) {
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55 ClassInfo ci = ei.getClassInfo();
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56 if (ci.isInstanceOf(type)) {
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57 list.add(ei);
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58 }
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59 }
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61 if (conf.getBoolean(id + ".include_null", true)){
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62 list.add(null);
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63 }
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64
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65 values = new int[list.size()];
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66 int i = 0;
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67 for ( ElementInfo ei : list) {
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68 if (ei != null) {
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69 values[i++] = ei.getObjectRef();
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70 } else {
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71 values[i++] = MJIEnv.NULL;
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72 }
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73 }
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74
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75 count = -1;
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76 }
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77
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78 @Override
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79 public Integer getChoice (int idx){
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80 if (idx >= 0 && idx < values.length){
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81 return values[idx];
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82 } else {
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83 throw new IllegalArgumentException("choice index out of range: " + idx);
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84 }
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85 }
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86
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87
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88 @Override
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89 public void advance () {
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90 count++;
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91 }
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92
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93 @Override
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94 public int getProcessedNumberOfChoices () {
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95 return count+1;
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96 }
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97
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98 @Override
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99 public int getTotalNumberOfChoices () {
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100 return values.length;
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101 }
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102
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103 @Override
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104 public boolean hasMoreChoices () {
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105 return !isDone && (count < values.length-1);
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106 }
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107
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108 @Override
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109 public void reset () {
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110 count = -1;
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111
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112 isDone = false;
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113 }
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114
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115 @Override
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116 public Integer getNextChoice () {
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117 if ((count >= 0) && (count < values.length)) {
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118 return new Integer(values[count]);
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119 } else {
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120 return new Integer(-1);
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121 }
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122 }
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123
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124 @Override
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125 public String toString() {
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126 StringBuilder sb = new StringBuilder("TypedObjectChoice [id=");
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127 sb.append(id);
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128 sb.append(",type=");
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129 sb.append(type);
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130 sb.append(",values=");
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131 for (int i=0; i< values.length; i++) {
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132 if (i>0) {
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133 sb.append(',');
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134 }
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135 if (i == count) {
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136 sb.append("=>");
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137 }
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138 sb.append(values[i]);
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139 }
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140 sb.append(']');
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141
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142 return sb.toString();
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143 }
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144
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145 @Override
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146 public TypedObjectChoice randomize() {
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147 for (int i = values.length - 1; i > 0; i--) {
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148 int j = random.nextInt(i + 1);
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149 int tmp = values[i];
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150 values[i] = values[j];
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151 values[j] = tmp;
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152 }
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153 return this;
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154 }
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155
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156 @Override
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157 public Class<Integer> getChoiceType() {
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158 return Integer.class;
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159 }
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160 }