1 | //------------------------------------------------------------------------------------------------- |
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2 | // Module : $RCSfile: DefaultSequenceDetectionRule.java,v $ |
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3 | // Version : $Revision: 0.0 $ $Author: patrick $ $Date: 18.03.2012 $ |
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4 | // Project : TaskTreeCreator |
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5 | // Creation : 2012 by patrick |
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6 | // Copyright : Patrick Harms, 2012 |
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7 | //------------------------------------------------------------------------------------------------- |
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8 | package de.ugoe.cs.quest.tasktrees.temporalrelation; |
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9 | |
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10 | import de.ugoe.cs.quest.tasktrees.treeifc.InteractionTask; |
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11 | import de.ugoe.cs.quest.tasktrees.treeifc.Sequence; |
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12 | import de.ugoe.cs.quest.tasktrees.treeifc.TaskTreeBuilder; |
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13 | import de.ugoe.cs.quest.tasktrees.treeifc.TaskTreeNode; |
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14 | import de.ugoe.cs.quest.tasktrees.treeifc.TaskTreeNodeFactory; |
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15 | |
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16 | //------------------------------------------------------------------------------------------------- |
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17 | /** |
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18 | * TODO comment |
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19 | * |
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20 | * @version $Revision: $ $Date: 18.03.2012$ |
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21 | * @author 2012, last modified by $Author: patrick$ |
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22 | */ |
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23 | //------------------------------------------------------------------------------------------------- |
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24 | public class DefaultSequenceDetectionRule implements TemporalRelationshipRule |
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25 | { |
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26 | |
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27 | //----------------------------------------------------------------------------------------------- |
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28 | /* (non-Javadoc) |
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29 | * @see de.ugoe.cs.tasktree.temporalrelation.TemporalRelationshipRule#apply(TaskTreeNode, TaskTreeBuilder, TaskTreeNodeFactory) |
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30 | */ |
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31 | //----------------------------------------------------------------------------------------------- |
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32 | @Override |
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33 | public RuleApplicationResult apply(TaskTreeNode parent, |
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34 | TaskTreeBuilder builder, |
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35 | TaskTreeNodeFactory nodeFactory, |
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36 | boolean finalize) |
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37 | { |
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38 | if (!(parent instanceof Sequence)) |
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39 | { |
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40 | return null; |
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41 | } |
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42 | |
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43 | RuleApplicationResult result = new RuleApplicationResult(); |
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44 | int sequenceStartingIndex = -1; |
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45 | |
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46 | int index = 0; |
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47 | while (index < parent.getChildren().size()) |
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48 | { |
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49 | TaskTreeNode child = parent.getChildren().get(index); |
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50 | |
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51 | if (child instanceof InteractionTask) |
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52 | { |
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53 | if (((InteractionTask) child).getInteraction().finishesLogicalSequence() && |
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54 | (sequenceStartingIndex > -1)) |
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55 | { |
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56 | // There are several situations in which this implementation may cause infinite |
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57 | // loops. This is because the rule manager will reapply rules until |
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58 | // no rule is applied anymore. A sequence identified in a first iteration will |
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59 | // be identified as a sequence also in a second iteration. As an example |
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60 | // many sequences start with an interaction starting that sequence and end |
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61 | // with an interaction ending that sequence. This will be reidentified as further |
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62 | // subsequence. It must therefore be assured, that a sequence, that was once |
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63 | // identified is not reidentified in a further application of the rule. For this, |
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64 | // the implementation performs a kind of dry run. It creates a list of children |
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65 | // that would belong to an identified sequence. Only if this list is not a |
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66 | // reidentification then a new sequence is created and added to the parent. If it |
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67 | // is a reidentification can be identified, if the list of children will contain |
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68 | // all children of the parent, or if the list of children only consists of one |
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69 | // sequence. Further, an identified sequence must at least have one child. |
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70 | if (((sequenceStartingIndex != 0) || (index != (parent.getChildren().size() - 1))) && |
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71 | (((index - sequenceStartingIndex) > 0) || |
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72 | (((index - sequenceStartingIndex) == 0) && |
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73 | (!((InteractionTask) child).getInteraction().startsLogicalSequence())))) |
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74 | { |
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75 | boolean allNewChildrenAreSequences = true; |
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76 | |
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77 | for (int j = sequenceStartingIndex; ((allNewChildrenAreSequences) && (j < index)); j++) |
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78 | { |
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79 | allNewChildrenAreSequences &= (parent.getChildren().get(j) instanceof Sequence); |
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80 | } |
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81 | |
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82 | if (!allNewChildrenAreSequences) |
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83 | { |
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84 | Sequence sequence = nodeFactory.createNewSequence(); |
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85 | |
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86 | for (int j = sequenceStartingIndex; j < index; j++) |
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87 | { |
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88 | builder.addChild(sequence, parent.getChildren().get(sequenceStartingIndex)); |
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89 | builder.removeChild((Sequence) parent, sequenceStartingIndex); |
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90 | } |
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91 | |
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92 | if (!((InteractionTask) child).getInteraction().startsLogicalSequence()) |
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93 | { |
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94 | builder.addChild(sequence, parent.getChildren().get(sequenceStartingIndex)); |
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95 | builder.removeChild((Sequence) parent, sequenceStartingIndex); |
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96 | } |
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97 | |
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98 | builder.addChild((Sequence) parent, sequenceStartingIndex, sequence); |
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99 | |
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100 | result.addNewlyCreatedParentNode(sequence); |
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101 | result.setRuleApplicationStatus(RuleApplicationStatus.RULE_APPLICATION_FINISHED); |
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102 | return result; |
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103 | } |
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104 | } |
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105 | } |
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106 | |
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107 | if (((InteractionTask) child).getInteraction().startsLogicalSequence()) |
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108 | { |
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109 | sequenceStartingIndex = index; |
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110 | } |
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111 | } |
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112 | |
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113 | index++; |
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114 | } |
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115 | |
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116 | if (sequenceStartingIndex >= 0) |
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117 | { |
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118 | result.setRuleApplicationStatus(RuleApplicationStatus.RULE_APPLICATION_FEASIBLE); |
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119 | } |
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120 | |
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121 | return result; |
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122 | } |
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123 | |
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124 | } |
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