1 | /*
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2 | Copyright 2006 by Sean Luke
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3 | Licensed under the Academic Free License version 3.0
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4 | See the file "LICENSE" for more information
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5 | */
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6 |
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7 |
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8 | package ec.app.edge.func;
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9 | import ec.*;
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10 | import ec.app.edge.*;
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11 | import ec.gp.*;
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12 | import ec.util.*;
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13 |
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14 | /*
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15 | * Double.java
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16 | *
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17 | * Created: Wed Nov 3 18:26:37 1999
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18 | * By: Sean Luke
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19 | */
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20 |
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21 | /**
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22 | * @author Sean Luke
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23 | * @version 1.0
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24 | */
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25 |
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26 | public class Double extends GPNode
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27 | {
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28 | public String toString() { return "double"; }
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29 |
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30 | public void checkConstraints(final EvolutionState state,
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31 | final int tree,
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32 | final GPIndividual typicalIndividual,
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33 | final Parameter individualBase)
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34 | {
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35 | super.checkConstraints(state,tree,typicalIndividual,individualBase);
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36 | if (children.length!=2)
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37 | state.output.error("Incorrect number of children for node " +
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38 | toStringForError() + " at " +
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39 | individualBase);
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40 | }
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41 |
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42 | public void eval(final EvolutionState state,
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43 | final int thread,
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44 | final GPData input,
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45 | final ADFStack stack,
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46 | final GPIndividual individual,
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47 | final Problem problem)
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48 | {
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49 | int edge = ((EdgeData)(input)).edge;
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50 | Edge prob = (Edge)problem;
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51 |
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52 | if (prob.from.length==prob.numEdges) // we're full, need to expand
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53 | {
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54 | int[] from_ = new int[prob.numEdges*2];
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55 | int[] to_ = new int[prob.numEdges*2];
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56 | int[] reading_ = new int[prob.numEdges*2];
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57 | System.arraycopy(prob.from,0,from_,0,prob.from.length);
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58 | System.arraycopy(prob.to,0,to_,0,prob.to.length);
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59 | System.arraycopy(prob.reading,0,reading_,0,prob.reading.length);
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60 | prob.from = from_;
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61 | prob.to = to_;
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62 | prob.reading = reading_;
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63 | }
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64 |
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65 | int newedge = prob.numEdges;
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66 | prob.numEdges++;
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67 | prob.from[newedge] = prob.from[edge];
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68 | prob.to[newedge] = prob.to[edge];
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69 | prob.reading[newedge] = prob.reading[edge];
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70 |
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71 | // pass the original edge down the left child
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72 |
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73 | children[0].eval(state,thread,input,stack,individual,problem);
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74 |
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75 | // reset input for right child
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76 | ((EdgeData)(input)).edge = newedge;
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77 |
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78 | // pass the new edge down the right child
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79 |
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80 | children[1].eval(state,thread,input,stack,individual,problem);
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81 | }
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82 | }
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83 |
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84 |
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85 |
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