Last change
on this file since 99 was
93,
checked in by sherbold, 13 years ago
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- moved generation of all possible sequences of a fixed length from de.ugoe.cs.eventbench.coverage.CoverageCalculator? to de.ugoe.cs.eventbench.models.IStochasticProcess
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-
Property svn:mime-type set to
text/plain
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File size:
993 bytes
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1 | package de.ugoe.cs.eventbench.models;
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2 |
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3 | import java.util.LinkedList;
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4 | import java.util.List;
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5 | import java.util.Random;
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6 |
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7 | import de.ugoe.cs.eventbench.data.Event;
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8 |
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9 | public class DeterministicFiniteAutomaton extends FirstOrderMarkovModel {
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10 |
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11 | /**
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12 | * Id for object serialization.
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13 | */
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14 | private static final long serialVersionUID = 1L;
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15 |
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16 | public DeterministicFiniteAutomaton(Random r) {
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17 | super(r);
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18 | }
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19 |
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20 | @Override
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21 | public double getProbability(List<? extends Event<?>> context, Event<?> symbol) {
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22 | double result = 0.0d;
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23 |
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24 | List<Event<?>> contextCopy;
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25 | if( context.size()>=trieOrder ) {
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26 | contextCopy = new LinkedList<Event<?>>(context.subList(context.size()-trieOrder+1, context.size()));
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27 | } else {
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28 | contextCopy = new LinkedList<Event<?>>(context);
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29 | }
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30 |
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31 |
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32 | List<Event<?>> followers = trie.getFollowingSymbols(contextCopy);
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33 |
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34 | if( followers.size()!=0 && followers.contains(symbol) ) {
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35 | result = 1.0d / followers.size();
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36 | }
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37 |
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38 | return result;
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39 | }
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40 |
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41 | }
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