Mercurial > hg > Members > kono > jpf-core

annotate src/main/gov/nasa/jpf/vm/choice/DoubleThresholdGenerator.java @ 0:61d41facf527

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author Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
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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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
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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.choice;
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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.ChoiceGeneratorBase;
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22 import gov.nasa.jpf.vm.DoubleChoiceGenerator;
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23
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24 /**
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25 * ChoiceGenerator instance that produces a simple 3 value enumeration
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26 *
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27 */
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28 public class DoubleThresholdGenerator extends ChoiceGeneratorBase<Double> implements DoubleChoiceGenerator {
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29
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30 protected double[] values = new double[3];
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31 protected int count;
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32
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33 public DoubleThresholdGenerator(Config conf, String id) {
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34 super(id);
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35
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36 values[0] = conf.getDouble(id + ".low");
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37 values[1] = conf.getDouble(id + ".threshold");
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38 values[2] = conf.getDouble(id + ".high");
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39 count = -1;
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40 }
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41
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42 @Override
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43 public void reset () {
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44 count = -1;
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45
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46 isDone = false;
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47 }
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48
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49 @Override
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50 public boolean hasMoreChoices () {
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51 return !isDone && (count < 2);
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52 }
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53
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54 @Override
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55 public Double getNextChoice () {
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56 if (count >=0) {
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57 return new Double(values[count]);
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58 } else {
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59 return new Double(values[0]);
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60 }
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61 }
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62
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63 @Override
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64 public void advance () {
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65 if (count < 2)
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66 count++;
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67 }
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68
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69 @Override
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70 public int getTotalNumberOfChoices () {
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71 return 3;
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72 }
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73
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74 @Override
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75 public int getProcessedNumberOfChoices () {
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76 return count + 1;
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77 }
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78
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79 @Override
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80 public String toString() {
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81 StringBuilder sb = new StringBuilder(getClass().getName());
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82 sb.append("[id=\"");
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83 sb.append(id);
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84 sb.append("\",");
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85
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86 for (int i=0; i<3; i++) {
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87 if (count == i) {
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88 sb.append(MARKER);
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89 }
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90 sb.append(values[i]);
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91 if (count < 2) {
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92 sb.append(',');
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93 }
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94 }
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95 sb.append(']');
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96 return sb.toString();
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97 }
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98
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99 @Override
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100 public DoubleThresholdGenerator randomize () {
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101 for (int i = values.length - 1; i > 0; i--) {
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102 int j = random.nextInt(i + 1);
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103 double tmp = values[i];
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104 values[i] = values[j];
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105 values[j] = tmp;
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106 }
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107 return this;
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108 }
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109
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110 @Override
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111 public Class<Double> getChoiceType() {
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112 return Double.class;
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113 }
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114 }