Mercurial > hg > Members > kono > jpf-core

comparison src/main/gov/nasa/jpf/search/heuristic/RandomHeuristic.java @ 0:61d41facf527

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initial v8 import (history reset)
author Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
date Fri, 23 Jan 2015 10:14:01 -0800
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1 /*
2 * Copyright (C) 2014, United States Government, as represented by the
3 * Administrator of the National Aeronautics and Space Administration.
4 * All rights reserved.
5 *
6 * The Java Pathfinder core (jpf-core) platform is licensed under the
7 * Apache License, Version 2.0 (the "License"); you may not use this file except
8 * in compliance with the License. You may obtain a copy of the License at
9 *
10 * http://www.apache.org/licenses/LICENSE-2.0.
11 *
12 * Unless required by applicable law or agreed to in writing, software
13 * distributed under the License is distributed on an "AS IS" BASIS,
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
15 * See the License for the specific language governing permissions and
16 * limitations under the License.
17 */
18 package gov.nasa.jpf.search.heuristic;
19
20 import gov.nasa.jpf.Config;
21 import gov.nasa.jpf.vm.VM;
22
23 import java.util.Random;
24
25
26 /**
27 * heuristic state prioritizer that returns random priority values
28 */
29 public class RandomHeuristic extends SimplePriorityHeuristic {
30
31 protected Random random;
32
33 public RandomHeuristic (Config config, VM vm) {
34 super(config,vm);
35
36 random = new Random( config.getInt("choice.seed", 42));
37 }
38
39 @Override
40 protected int computeHeuristicValue () {
41 return java.lang.Math.abs(random.nextInt());
42 }
43 }