Mercurial > hg > Members > kono > jpf-core
annotate src/main/gov/nasa/jpf/vm/Verify.java @ 3:fdc263e5806b
added inverse matching in StringSetMatcher. Since this is not easy to do in regexes, it's at the next hight level in StringSetMatcher
added a optional CG accessor interface (geChoice(i), getAllChoices(), getProcessedChoices() getUnprocessedChoices()) that can be used from listeners and peers to enumerate/analyse choice sets. Note that not all CGs have to support this as there is no requirement that CGs actually use pre-computed choice sets. The low level accessor is getChoice(i), ChoiceGeneratorBase provides generic (not very efficient) set accessor implementations. Note that ChoiceGeneratorBase.getChoice() has to be overridden in subclasses in order to support choice enumeration, the default impl is just there so that we don't break subclass compilation
author | Peter Mehlitz <Peter.C.Mehlitz@nasa.gov> |
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date | Tue, 03 Feb 2015 08:49:33 -0800 |
parents | f6886b2bda4a |
children | caa0924e093d |
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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 java.io.FileInputStream; |
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21 import java.io.FileOutputStream; |
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22 import java.io.ObjectInputStream; |
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23 import java.io.ObjectOutputStream; |
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24 import java.util.BitSet; |
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25 import java.util.Random; |
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26 |
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27 |
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28 /** |
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29 * Verify is the programmatic interface of JPF that can be used from inside of |
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30 * applications. In order to enable programs to run outside of the JPF |
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31 * environment, we provide (mostly empty) bodies for the methods that are |
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32 * otherwise intercepted by the native peer class |
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33 */ |
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34 public class Verify { |
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35 static final int MAX_COUNTERS = 10; |
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36 static int[] counter; // only here so that we don't pull in all JPF classes at RT |
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37 |
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38 private static Random random; |
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39 |
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40 /* |
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41 * only set if this was used from within a JPF context. This is mainly to |
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42 * enable encapsulation of JPF specific types so that they only get |
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43 * pulled in on demand, and we otherwise can still use the same Verify class |
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44 * for JPF-external execution. We use a class object to make sure it doesn't |
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45 * get recycled once JPF is terminated. |
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46 */ |
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47 static Class<?> peer; |
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48 |
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49 private static Random getRandom() { |
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50 if (random == null) { |
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51 random = new Random(42); |
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52 } |
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53 return random; |
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54 } |
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55 |
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56 /* |
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57 * register the peer class, which is only done from within a JPF execution |
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58 * context. Be aware of that this migh actually load the real Verify class. |
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59 * The sequence usually is |
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60 * JPF(Verify) -> VM(JPF_gov_nasa_jpf_vm_Verify) -> VM(Verify) |
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61 */ |
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62 public static void setPeerClass (Class<?> cls) { |
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63 peer = cls; |
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64 } |
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65 |
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66 // note this is NOT marked native because we might also call it from host VM code |
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67 // (beware that Verify is a different class there!). When executed by JPF, |
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68 // this is an MJI method |
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69 public static int getCounter (int id) { |
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70 if (peer != null) { |
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71 // this is executed if we are in a JPF context |
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72 return JPF_gov_nasa_jpf_vm_Verify.getCounter__I__I(null, 0, id); |
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73 } else { |
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74 if (counter == null) { |
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75 counter = new int[id >= MAX_COUNTERS ? (id+1) : MAX_COUNTERS]; |
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76 } |
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77 if ((id < 0) || (id >= counter.length)) { |
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78 return 0; |
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79 } |
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80 |
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81 return counter[id]; |
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82 } |
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83 } |
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84 |
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85 public static void resetCounter (int id) { |
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86 if (peer != null){ |
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87 JPF_gov_nasa_jpf_vm_Verify.resetCounter__I__V(null, 0, id); |
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88 } else { |
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89 if ((counter != null) && (id >= 0) && (id < counter.length)) { |
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90 counter[id] = 0; |
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91 } |
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92 } |
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93 } |
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94 |
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95 public static void setCounter (int id, int val) { |
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96 if (peer != null){ |
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97 JPF_gov_nasa_jpf_vm_Verify.setCounter__II__V(null, 0, id, val); |
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98 } else { |
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99 if ((counter != null) && (id >= 0) && (id < counter.length)) { |
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100 counter[id] = val; |
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101 } |
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102 } |
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103 } |
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104 |
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105 |
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106 public static int incrementCounter (int id) { |
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107 if (peer != null){ |
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108 return JPF_gov_nasa_jpf_vm_Verify.incrementCounter__I__I(null, 0, id); |
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109 } else { |
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110 if (counter == null) { |
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111 counter = new int[(id >= MAX_COUNTERS) ? id+1 : MAX_COUNTERS]; |
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112 } else if (id >= counter.length) { |
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113 int[] newCounter = new int[id+1]; |
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114 System.arraycopy(counter, 0, newCounter, 0, counter.length); |
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115 counter = newCounter; |
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116 } |
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117 |
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118 if ((id >= 0) && (id < counter.length)) { |
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119 return ++counter[id]; |
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120 } |
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121 |
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122 return 0; |
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123 } |
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124 } |
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125 |
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126 public static final int NO_VALUE = -1; |
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127 |
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128 public static void putValue (String key, int value) { |
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129 throw new UnsupportedOperationException("putValue requires JPF execution"); |
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130 } |
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131 |
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132 public static int getValue (String key) { |
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133 throw new UnsupportedOperationException("getValue requires JPF execution"); |
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134 } |
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135 |
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136 // same mechanism and purpose as the counters, but with BitSets, which is |
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137 // more convenient if we have a lot of different events to check |
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138 |
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139 static BitSet[] bitSets; |
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140 |
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141 private static void checkBitSetId(int id) { |
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142 if (bitSets == null) { |
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143 bitSets = new BitSet[id + 1]; |
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144 } else if (id >= bitSets.length) { |
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145 BitSet[] newBitSets = new BitSet[id + 1]; |
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146 System.arraycopy(bitSets, 0, newBitSets, 0, bitSets.length); |
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147 bitSets = newBitSets; |
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148 } |
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149 |
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150 if (bitSets[id] == null) { |
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151 bitSets[id] = new BitSet(); |
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152 } |
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153 } |
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154 |
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155 |
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156 public static void setBitInBitSet(int id, int bit, boolean value) { |
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157 if (peer != null){ |
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158 // this is executed if we did run JPF |
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159 JPF_gov_nasa_jpf_vm_Verify.setBitInBitSet__IIZ__V(null, 0, id, bit, value); |
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160 } else { |
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161 // this is executed if we run this without previously executing JPF |
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162 checkBitSetId(id); |
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163 bitSets[id].set(bit, value); |
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164 } |
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165 } |
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166 |
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167 public static boolean getBitInBitSet(int id, int bit) { |
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168 if (peer != null){ |
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169 // this is executed if we did run JPF |
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170 return JPF_gov_nasa_jpf_vm_Verify.getBitInBitSet__II__Z(null, 0, id, bit); |
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171 |
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172 } else { |
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173 // this is executed if we run this without previously executing JPF |
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174 checkBitSetId(id); |
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175 return bitSets[id].get(bit); |
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176 } |
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177 } |
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178 |
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179 /** |
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180 * Adds a comment to the error trace, which will be printed and saved. |
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181 */ |
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182 public static void addComment (String s) {} |
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183 |
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184 /** |
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185 * Backwards compatibility START |
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186 * @deprecated use "assert cond : msg" |
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187 */ |
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188 @Deprecated |
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189 public static void assertTrue (String s, boolean cond) { |
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190 if (!cond) { |
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191 System.out.println(s); |
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192 assertTrue(cond); |
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193 } |
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194 } |
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195 |
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196 /** |
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197 * Checks that the condition is true. |
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198 * @deprecated use 'assert' directly |
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199 */ |
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200 @Deprecated |
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201 public static void assertTrue (boolean cond) { |
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202 if (!cond) { |
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203 throw new AssertionError("Verify.assertTrue failed"); |
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204 } |
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205 } |
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206 |
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207 public static void atLabel (String label) {} |
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208 |
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209 public static void atLabel (int label) {} |
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210 |
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211 /** |
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212 * Marks the beginning of an atomic block. |
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213 * THIS IS EVIL, DON'T USE IT FOR OPTIMIZATION - THAT'S WHAT POR IS FOR! |
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214 * (it's mostly here to support model classes that need to execute atomic) |
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215 */ |
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216 public static void beginAtomic () {} |
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217 |
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218 /** |
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219 * Marks the end of an atomic block. |
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220 * EVIL - see beginAtomic() |
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221 */ |
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222 public static void endAtomic () {} |
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223 |
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224 public static void boring (boolean cond) {} |
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225 |
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226 public static void busyWait (long duration) { |
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227 // this gets only executed outside of JPF |
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228 while (duration > 0) { |
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229 duration--; |
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230 } |
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231 } |
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232 |
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233 public static boolean isCalledFromClass (String refClsName) { |
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234 Throwable t = new Throwable(); |
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235 StackTraceElement[] st = t.getStackTrace(); |
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236 |
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237 if (st.length < 3) { |
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238 // main() or run() |
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239 return false; |
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240 } |
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241 |
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242 try { |
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243 Class<?> refClazz = Class.forName(refClsName); |
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244 Class<?> callClazz = Class.forName(st[2].getClassName()); |
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245 |
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246 return (refClazz.isAssignableFrom(callClazz)); |
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247 |
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248 } catch (ClassNotFoundException cfnx) { |
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249 return false; |
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250 } |
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251 } |
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252 |
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253 public static void ignoreIf (boolean cond) {} |
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254 |
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255 public static void instrumentPoint (String label) {} |
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256 |
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257 public static void instrumentPointDeep (String label) {} |
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258 |
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259 public static void instrumentPointDeepRecur (String label, int depth) {} |
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260 |
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261 public static void interesting (boolean cond) {} |
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262 |
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263 public static void breakTransition (String reason) {} |
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264 |
1
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265 /** for testing and debugging purposes */ |
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266 public static int breakTransition (String reason, int min, int max) { |
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267 return -1; |
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268 } |
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269 |
0
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270 /** |
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271 * simple debugging aids to imperatively print the current path output of the SUT |
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272 * (to be used with vm.path_output) |
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273 */ |
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274 public static void printPathOutput(String msg) {} |
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275 public static void printPathOutput(boolean cond, String msg) {} |
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276 |
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277 public static void threadPrint (String s) { |
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278 System.out.print( Thread.currentThread().getName()); |
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279 System.out.print(": "); |
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280 System.out.print(s); |
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281 } |
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282 |
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283 public static void threadPrintln (String s) { |
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284 threadPrint(s); |
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285 System.out.println(); |
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286 } |
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287 |
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288 public static void print (String s) { |
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289 System.out.print(s); |
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290 } |
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291 |
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292 public static void println (String s) { |
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293 System.out.println(s); |
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294 } |
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295 |
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296 public static void print (String s, int i) { |
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297 System.out.print(s + " : " + i); |
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298 } |
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299 |
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300 public static void print (String s, boolean b) { |
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301 System.out.print(s + " : " + b); |
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302 } |
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303 |
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304 public static void println() { |
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305 System.out.println(); |
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306 } |
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307 |
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308 /** |
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309 * this is to avoid StringBuilders |
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310 */ |
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311 public static void print (String... args){ |
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312 for (String s : args){ |
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313 System.out.print(s); |
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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 * note - these are mostly for debugging purposes (to see if attributes get |
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319 * propagated correctly, w/o having to write a listener), since attributes are |
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320 * supposed to be created at the native side, and hence can't be accessed from |
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321 * the application |
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322 */ |
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323 |
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324 //--- use these if you know there are single attributes |
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325 public static void setFieldAttribute (Object o, String fieldName, int val) {} |
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326 public static int getFieldAttribute (Object o, String fieldName) { return 0; } |
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327 |
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328 //--- use these for multiple attributes |
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329 public static void addFieldAttribute (Object o, String fieldName, int val) {} |
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330 public static int[] getFieldAttributes (Object o, String fieldName) { return new int[0]; } |
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331 |
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332 public static void setLocalAttribute (String varName, int val) {} |
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333 public static int getLocalAttribute (String varName) { return 0; } |
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334 |
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335 public static void addLocalAttribute (String varName, int val) {} |
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336 public static int[] getLocalAttributes (String varName) { return new int[0]; } |
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337 |
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338 public static void setElementAttribute (Object arr, int idx, int val){} |
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339 public static int getElementAttribute (Object arr, int idx) { return 0; } |
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340 |
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341 public static void addElementAttribute (Object arr, int idx, int val){} |
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342 public static int[] getElementAttributes (Object arr, int idx) { return new int[0]; } |
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343 |
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344 public static void setObjectAttribute (Object o, int val) {} |
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345 public static int getObjectAttribute (Object o) { return 0; } |
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346 |
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347 public static void addObjectAttribute (Object o, int val) {} |
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348 public static int[] getObjectAttributes (Object o) { return new int[0]; } |
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349 |
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350 |
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351 /** |
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352 * this is the new boolean choice generator. Since there's no real |
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353 * heuristic involved with boolean values, we skip the id (it's a |
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354 * hardwired "boolean") |
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355 */ |
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356 public static boolean getBoolean () { |
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357 // just executed when not running inside JPF, native otherwise |
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358 return ((System.currentTimeMillis() & 1) != 0); |
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359 } |
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360 |
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361 /** |
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362 * new boolean choice generator that also tells jpf which value to |
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363 * use first by default in a search. |
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364 */ |
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365 public static boolean getBoolean (boolean falseFirst) { |
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366 // this is only executed when not running JPF |
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367 return getBoolean(); |
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368 } |
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369 |
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370 |
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371 /** |
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372 * Returns int nondeterministically between (and including) min and max. |
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373 */ |
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374 public static int getInt (int min, int max) { |
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375 // this is only executed when not running JPF, native otherwise |
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376 return getRandom().nextInt((max-min+1)) + min; |
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377 } |
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378 |
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379 public static int getIntFromList (int... values){ |
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380 if (values != null && values.length > 0) { |
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381 int i = getRandom().nextInt(values.length); |
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382 return values[i]; |
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383 } else { |
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384 return getRandom().nextInt(); |
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385 } |
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386 } |
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387 |
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388 public static Object getObject (String key) { |
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389 return "?"; |
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390 } |
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391 |
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392 /** |
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393 * this is the API for int value choice generators. 'id' is used to identify |
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394 * both the corresponding ChoiceGenerator subclass, and the application specific |
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395 * ctor parameters from the normal JPF configuration mechanism |
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396 */ |
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397 public static int getInt (String key){ |
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398 // this is only executed when not running JPF, native otherwise |
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399 return getRandom().nextInt(); |
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400 } |
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401 |
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402 /** |
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403 * this is the API for double value choice generators. 'id' is used to identify |
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404 * both the corresponding ChoiceGenerator subclass, and the application specific |
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405 * ctor parameters from the normal JPF configuration mechanism |
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406 */ |
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407 public static double getDouble (String key){ |
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408 // this is only executed when not running JPF, native otherwise |
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409 return getRandom().nextDouble(); |
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410 } |
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411 |
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412 public static double getDoubleFromList (double... values){ |
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413 if (values != null && values.length > 0) { |
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414 int i = getRandom().nextInt(values.length); |
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415 return values[i]; |
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416 } else { |
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417 return getRandom().nextDouble(); |
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418 } |
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419 } |
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420 |
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421 public static long getLongFromList (long...values){ |
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422 if (values != null && values.length > 0) { |
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423 int i = getRandom().nextInt(values.length); |
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424 return values[i]; |
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425 } else { |
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426 return getRandom().nextLong(); |
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427 } |
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428 } |
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429 |
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430 public static float getFloatFromList (float...values){ |
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431 if (values != null && values.length > 0) { |
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432 int i = getRandom().nextInt(values.length); |
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433 return values[i]; |
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434 } else { |
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435 return getRandom().nextFloat(); |
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436 } |
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437 } |
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438 |
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439 |
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440 /** |
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441 * Returns a random number between 0 and max inclusive. |
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442 */ |
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443 public static int random (int max) { |
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444 // this is only executed when not running JPF |
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445 return getRandom().nextInt(max + 1); |
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446 } |
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447 |
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448 /** |
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449 * Returns a random boolean value, true or false. Note this gets |
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450 * handled by the native peer, and is just here to enable running |
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451 * instrumented applications w/o JPF |
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452 */ |
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453 public static boolean randomBool () { |
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454 // this is only executed when not running JPF |
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455 return getRandom().nextBoolean(); |
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456 } |
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457 |
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458 public static long currentTimeMillis () { |
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459 return System.currentTimeMillis(); |
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460 } |
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461 |
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462 // Backwards compatibility START |
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463 public static Object randomObject (String type) { |
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464 return null; |
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465 } |
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466 |
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467 public static boolean isRunningInJPF() { |
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468 return false; |
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469 } |
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470 |
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471 /** |
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472 * USE CAREFULLY - returns true if the virtual machine this code is |
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473 * running under is doing state matching. This can be used as a hint |
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474 * as to whether data structures (that are known to be correct!) |
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475 * should be configured to use a canonical representation. For example, |
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476 * <pre><code> |
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477 * Vector v = new Vector(); |
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478 * v.add(obj1); |
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479 * if (Verify.getBoolean()) { |
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480 * v.addAll(eleventyBillionObjectCollection); |
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481 * v.setSize(1); |
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482 * } |
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483 * // compare states here |
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484 * </code></pre> |
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485 * To the programmer, the states are (almost certainly) the same. To |
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486 * the VM, they could be different (capacity inside the Vector). For |
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487 * the sake of speed, Vector does not store things canonically, but this |
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488 * can cause (probably mild) state explosion if matching states. If |
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489 * you know whether states are being matched, you can choose the right |
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490 * structure--as long as those structures aren't what you're looking for |
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491 * bugs in! |
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492 */ |
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493 public static boolean vmIsMatchingStates() { |
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494 return false; |
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495 } |
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496 |
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497 public static void storeTrace (String fileName, String comment) { |
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498 // intercepted in NativePeer |
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499 } |
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500 |
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501 public static void storeTraceIf (boolean cond, String fileName, String comment) { |
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502 if (cond) { |
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503 storeTrace(fileName, comment); |
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504 } |
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505 } |
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506 |
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507 public static void storeTraceAndTerminate (String fileName, String comment) { |
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508 storeTrace(fileName, comment); |
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509 terminateSearch(); |
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510 } |
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511 |
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512 public static void storeTraceAndTerminateIf (boolean cond, String fileName, String comment) { |
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513 if (cond) { |
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514 storeTrace(fileName, comment); |
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515 terminateSearch(); |
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516 } |
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517 } |
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518 |
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519 public static boolean isTraceReplay () { |
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520 return false; // native |
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521 } |
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522 |
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523 public static boolean isShared (Object o){ |
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524 return false; // native |
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525 } |
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526 |
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527 public static void setShared (Object o, boolean isShared) { |
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528 // native |
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529 } |
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530 |
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531 public static void freezeSharedness (Object o, boolean freeze) { |
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532 // native |
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533 } |
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534 |
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535 public static void terminateSearch () { |
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parents:
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536 // native |
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537 } |
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538 |
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539 public static void setProperties (String... p) { |
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parents:
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540 // native |
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541 } |
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542 |
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543 public static String getProperty (String key) { |
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544 // native |
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545 return null; |
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546 } |
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547 |
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548 public static <T> T createFromJSON(Class<T> clazz, String json){ |
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549 return null; |
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550 } |
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551 |
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552 public static void writeObjectToFile(Object object, String fileName) { |
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553 try { |
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554 FileOutputStream fso = new FileOutputStream(fileName); |
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555 ObjectOutputStream oos = new ObjectOutputStream(fso); |
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556 oos.writeObject(object); |
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557 oos.flush(); |
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558 oos.close(); |
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559 |
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560 } catch (Exception ex) { |
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561 throw new RuntimeException(ex); |
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|
562 } |
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|
563 |
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|
564 } |
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|
565 |
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566 public static <T> T readObjectFromFile(Class<T> clazz, String fileName) { |
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|
567 try |
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diff
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|
568 { |
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|
569 FileInputStream fis = new FileInputStream(fileName); |
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570 ObjectInputStream ois = new ObjectInputStream(fis); |
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|
571 |
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572 Object read = ois.readObject(); |
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|
573 |
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574 return (T) read; |
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parents:
diff
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|
575 |
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diff
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576 } |
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577 catch (Exception ex) { |
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parents:
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578 throw new RuntimeException(ex); |
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|
579 } |
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parents:
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580 |
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|
581 } |
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582 |
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|
583 |
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|
584 //--- model logging support |
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diff
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|
585 |
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parents:
diff
changeset
|
586 /* |
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parents:
diff
changeset
|
587 * we add these here so that we don't need to pull in any java.util.logging classes |
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588 * Note - these need to be kept in sync with our native peer |
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parents:
diff
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|
589 */ |
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590 public static final int SEVERE = 1; |
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parents:
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591 public static final int WARNING = 2; |
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diff
changeset
|
592 public static final int INFO = 3; |
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parents:
diff
changeset
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593 public static final int FINE = 4; |
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parents:
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|
594 public static final int FINER = 5; |
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parents:
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changeset
|
595 public static final int FINEST = 6; |
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parents:
diff
changeset
|
596 |
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parents:
diff
changeset
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597 public static void log( String loggerId, int logLevel, String msg){ |
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parents:
diff
changeset
|
598 System.err.println(msg); |
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parents:
diff
changeset
|
599 } |
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parents:
diff
changeset
|
600 |
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parents:
diff
changeset
|
601 // to avoid construction of strings on the model side |
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parents:
diff
changeset
|
602 public static void log( String loggerId, int logLevel, String msg, String arg){ |
61d41facf527
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parents:
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changeset
|
603 System.err.println(msg); |
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parents:
diff
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|
604 } |
61d41facf527
initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff
changeset
|
605 |
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff
changeset
|
606 public static void log( String loggerId, int logLevel, String format, Object... args){ |
61d41facf527
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parents:
diff
changeset
|
607 System.err.printf(format, args); |
61d41facf527
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parents:
diff
changeset
|
608 } |
61d41facf527
initial v8 import (history reset)
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parents:
diff
changeset
|
609 |
61d41facf527
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parents:
diff
changeset
|
610 |
61d41facf527
initial v8 import (history reset)
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parents:
diff
changeset
|
611 } |