Mercurial > hg > Members > kono > jpf-core
annotate src/main/gov/nasa/jpf/search/heuristic/RandomHeuristic.java @ 0:61d41facf527
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author | Peter Mehlitz <Peter.C.Mehlitz@nasa.gov> |
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date | Fri, 23 Jan 2015 10:14:01 -0800 |
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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.search.heuristic; |
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19 |
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20 import gov.nasa.jpf.Config; |
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21 import gov.nasa.jpf.vm.VM; |
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22 |
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23 import java.util.Random; |
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24 |
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25 |
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26 /** |
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27 * heuristic state prioritizer that returns random priority values |
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28 */ |
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29 public class RandomHeuristic extends SimplePriorityHeuristic { |
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30 |
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31 protected Random random; |
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32 |
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33 public RandomHeuristic (Config config, VM vm) { |
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34 super(config,vm); |
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35 |
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36 random = new Random( config.getInt("choice.seed", 42)); |
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37 } |
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38 |
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39 @Override |
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40 protected int computeHeuristicValue () { |
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41 return java.lang.Math.abs(random.nextInt()); |
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42 } |
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43 } |