1 | // Copyright 2012 Georg-August-Universität Göttingen, Germany |
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2 | // |
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3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
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4 | // you may not use this file except in compliance with the License. |
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5 | // You may obtain a copy of the License at |
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6 | // |
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7 | // http://www.apache.org/licenses/LICENSE-2.0 |
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8 | // |
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9 | // Unless required by applicable law or agreed to in writing, software |
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10 | // distributed under the License is distributed on an "AS IS" BASIS, |
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11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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12 | // See the License for the specific language governing permissions and |
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13 | // limitations under the License. |
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14 | |
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15 | package de.ugoe.cs.autoquest.tasktrees.temporalrelation; |
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16 | |
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17 | import java.util.ArrayList; |
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18 | import java.util.Collections; |
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19 | import java.util.Comparator; |
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20 | import java.util.HashMap; |
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21 | import java.util.HashSet; |
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22 | import java.util.Iterator; |
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23 | import java.util.LinkedList; |
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24 | import java.util.List; |
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25 | import java.util.Map; |
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26 | import java.util.Set; |
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27 | import java.util.logging.Level; |
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28 | |
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29 | import de.ugoe.cs.autoquest.tasktrees.alignment.algorithms.Match; |
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30 | import de.ugoe.cs.autoquest.tasktrees.alignment.algorithms.MatchOccurence; |
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31 | import de.ugoe.cs.autoquest.tasktrees.alignment.algorithms.NumberSequence; |
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32 | import de.ugoe.cs.autoquest.tasktrees.alignment.matrix.PairwiseAlignmentGenerator; |
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33 | import de.ugoe.cs.autoquest.tasktrees.alignment.matrix.PairwiseAlignmentStorage; |
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34 | import de.ugoe.cs.autoquest.tasktrees.alignment.matrix.ObjectDistanceSubstitionMatrix; |
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35 | import de.ugoe.cs.autoquest.tasktrees.taskequality.TaskEquality; |
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36 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IIteration; |
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37 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IIterationInstance; |
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38 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IOptional; |
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39 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ISelection; |
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40 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ISelectionInstance; |
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41 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ISequence; |
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42 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ISequenceInstance; |
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43 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITask; |
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44 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskBuilder; |
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45 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskFactory; |
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46 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstance; |
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47 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstanceList; |
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48 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IUserSession; |
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49 | import de.ugoe.cs.autoquest.usageprofiles.SymbolMap; |
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50 | import de.ugoe.cs.util.StopWatch; |
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51 | import de.ugoe.cs.util.console.Console; |
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52 | |
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53 | /** |
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54 | * <p> |
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55 | * This class implements the major rule for creating task trees based on a set |
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56 | * of recorded user sessions. For this, it first harmonizes all tasks. This |
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57 | * eases later comparison. Then it searches the sessions for iterations and |
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58 | * replaces them accordingly. Then it searches for sub sequences being the |
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59 | * longest and occurring most often. For each found sub sequence, it replaces |
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60 | * the occurrences by creating appropriate {@link ISequence}s. Afterwards, again |
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61 | * searches for iterations and then again for sub sequences until no more |
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62 | * replacements are done. |
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63 | * </p> |
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64 | * <p> |
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65 | * |
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66 | * |
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67 | * @author Patrick Harms |
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68 | */ |
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69 | class SequenceForTaskDetectionRuleAlignment implements ISessionScopeRule { |
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70 | |
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71 | /** |
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72 | * <p> |
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73 | * the task factory to be used for creating substructures for the temporal |
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74 | * relationships identified during rul application |
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75 | * </p> |
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76 | */ |
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77 | private ITaskFactory taskFactory; |
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78 | /** |
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79 | * <p> |
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80 | * the task builder to be used for creating substructures for the temporal |
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81 | * relationships identified during rule application |
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82 | * </p> |
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83 | */ |
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84 | private ITaskBuilder taskBuilder; |
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85 | |
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86 | /** |
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87 | * <p> |
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88 | * the task handling strategy to be used for comparing tasks for |
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89 | * preparation, i.e., before the tasks are harmonized |
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90 | * </p> |
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91 | */ |
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92 | private TaskHandlingStrategy preparationTaskHandlingStrategy; |
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93 | |
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94 | /** |
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95 | * <p> |
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96 | * the task handling strategy to be used for comparing tasks during |
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97 | * iteration detection i.e., after the tasks are harmonized |
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98 | * </p> |
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99 | */ |
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100 | private TaskHandlingStrategy identityTaskHandlingStrategy; |
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101 | |
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102 | /** |
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103 | * <p> |
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104 | * instantiates the rule and initializes it with a task equality to be |
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105 | * considered when comparing tasks as well as a task factory and builder to |
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106 | * be used for creating task structures. |
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107 | * </p> |
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108 | * |
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109 | * @param minimalTaskEquality |
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110 | * the task equality to be considered when comparing tasks |
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111 | * @param taskFactory |
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112 | * the task factory to be used for creating substructures |
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113 | * @param taskBuilder |
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114 | * the task builder to be used for creating substructures |
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115 | */ |
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116 | |
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117 | SequenceForTaskDetectionRuleAlignment(TaskEquality minimalTaskEquality, |
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118 | ITaskFactory taskFactory, ITaskBuilder taskBuilder) { |
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119 | this.taskFactory = taskFactory; |
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120 | this.taskBuilder = taskBuilder; |
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121 | |
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122 | this.preparationTaskHandlingStrategy = new TaskHandlingStrategy( |
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123 | minimalTaskEquality); |
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124 | this.identityTaskHandlingStrategy = new TaskHandlingStrategy( |
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125 | TaskEquality.IDENTICAL); |
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126 | |
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127 | } |
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128 | |
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129 | /* |
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130 | * (non-Javadoc) |
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131 | * |
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132 | * @see java.lang.Object#toString() |
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133 | */ |
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134 | @Override |
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135 | public String toString() { |
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136 | return "SequenceForTaskDetectionRuleAlignment"; |
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137 | } |
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138 | |
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139 | /* |
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140 | * (non-Javadoc) |
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141 | * |
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142 | * @see |
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143 | * de.ugoe.cs.autoquest.tasktrees.temporalrelation.ISessionScopeRule#apply |
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144 | * (java.util.List) |
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145 | */ |
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146 | @Override |
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147 | public RuleApplicationResult apply(List<IUserSession> sessions) { |
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148 | RuleApplicationData appData = new RuleApplicationData(sessions); |
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149 | |
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150 | // this is the real rule application. Loop while something is replaced. |
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151 | SymbolMap<ITaskInstance, ITask> uniqueTasks = harmonizeEventTaskInstancesModel(appData); |
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152 | |
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153 | // Generate a substitution matrix between all occurring events. |
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154 | Console.traceln(Level.INFO, "generating substitution matrix"); |
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155 | ObjectDistanceSubstitionMatrix submat = new ObjectDistanceSubstitionMatrix( |
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156 | uniqueTasks, 6, -3); |
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157 | submat.generate(); |
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158 | |
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159 | // Generate pairwise alignments |
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160 | Console.traceln(Level.INFO, "generating pairwise alignments"); |
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161 | LinkedList<Match> matchseqs = new LinkedList<Match>(); |
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162 | PairwiseAlignmentStorage alignments = PairwiseAlignmentGenerator |
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163 | .generate(appData.getNumberSequences(), submat, 9); |
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164 | |
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165 | // Retrieve all matches reached a specific threshold |
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166 | Console.traceln(Level.INFO, "retrieving significant sequence pieces"); |
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167 | for (int i = 0; i < appData.getNumberSequences().size(); i++) { |
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168 | Console.traceln( |
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169 | Level.FINEST, |
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170 | "retrieving significant sequence pieces: " |
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171 | + Math.round((float) i |
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172 | / (float) appData.getNumberSequences() |
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173 | .size() * 100) + "%"); |
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174 | for (int j = 0; j < appData.getNumberSequences().size(); j++) { |
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175 | if (i != j) { |
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176 | matchseqs.addAll(alignments.get(i, j).getMatches()); |
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177 | } |
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178 | } |
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179 | } |
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180 | Console.traceln(Level.FINEST, |
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181 | "retrieving significant sequence pieces: 100%"); |
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182 | Console.traceln(Level.INFO, "searching for patterns occuring most"); |
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183 | |
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184 | // search each match in every other sequence |
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185 | for (Iterator<Match> it = matchseqs.iterator(); it.hasNext();) { |
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186 | Match pattern = it.next(); |
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187 | |
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188 | // Skip sequences with more 0 events (scrolls) than other events. |
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189 | // Both of the pattern sequences are equally long, so the zero |
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190 | // counts just need to be smaller than the length of one sequence |
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191 | if (pattern.getFirstSequence().eventCount(0) |
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192 | + pattern.getSecondSequence().eventCount(0) + 1 > pattern |
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193 | .getFirstSequence().size()) |
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194 | continue; |
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195 | |
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196 | for (int j = 0; j < appData.getNumberSequences().size(); j++) { |
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197 | LinkedList<Integer> startpositions = appData |
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198 | .getNumberSequences().get(j).containsPattern(pattern); |
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199 | if (startpositions.size() > 0) { |
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200 | for (Iterator<Integer> jt = startpositions.iterator(); jt |
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201 | .hasNext();) { |
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202 | int start = jt.next(); |
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203 | pattern.addOccurence(new MatchOccurence(start, start |
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204 | + pattern.size(), j)); |
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205 | } |
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206 | |
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207 | } |
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208 | } |
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209 | } |
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210 | |
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211 | Console.traceln(Level.INFO, "sorting results"); |
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212 | // Sort results to get the most occurring results |
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213 | Comparator<Match> comparator = new Comparator<Match>() { |
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214 | public int compare(Match m1, Match m2) { |
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215 | return m2.occurenceCount() - m1.occurenceCount(); |
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216 | |
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217 | } |
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218 | }; |
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219 | Collections.sort(matchseqs, comparator); |
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220 | |
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221 | HashMap<Integer, List<MatchOccurence>> replacedOccurences = new HashMap<Integer, List<MatchOccurence>>(); |
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222 | // Replace matches in the sessions |
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223 | for (int i = 0; i < matchseqs.size(); i++) { |
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224 | // Every pattern consists of 2 sequences, therefore the minimum |
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225 | // occurrences here is 2. |
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226 | // We just need the sequences also occurring in other sequences as |
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227 | // well |
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228 | if (matchseqs.get(i).occurenceCount() > 2) { |
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229 | |
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230 | ISequence task = matchAsSequence(appData, matchseqs.get(i)); |
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231 | invalidOccurence: for (Iterator<MatchOccurence> it = matchseqs |
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232 | .get(i).getOccurences().iterator(); it.hasNext();) { |
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233 | MatchOccurence oc = it.next(); |
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234 | /* |
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235 | System.out.println("Trying to replace sequence: "); |
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236 | matchseqs.get(i).getFirstSequence().printSequence(); |
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237 | matchseqs.get(i).getSecondSequence().printSequence(); |
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238 | System.out.println(" in session number: " |
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239 | + (oc.getSequenceId() + 1) |
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240 | + " at position " |
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241 | + (oc.getStartindex()) |
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242 | + "-" |
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243 | + oc.getEndindex()); |
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244 | System.out.println(); |
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245 | */ |
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246 | |
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247 | // System.out.println("Printing session: "); |
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248 | //for (int j = 0; j < sessions.get(oc.getSequenceId()).size(); j++) { |
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249 | // System.out.println(j + ": " |
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250 | // + sessions.get(oc.getSequenceId()).get(j)); |
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251 | //} |
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252 | |
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253 | // Check if nothing has been replaced in the sequence we |
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254 | // want to replace |
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255 | if (replacedOccurences.get(oc.getSequenceId()) == null) { |
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256 | replacedOccurences.put(oc.getSequenceId(), |
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257 | new LinkedList<MatchOccurence>()); |
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258 | } else { |
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259 | // check if we have any replaced occurence with indexes |
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260 | // smaller than ours. If so, we need to adjust our start |
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261 | // and endpoints |
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262 | // of the replacement. |
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263 | // Also do a check if we have replaced this specific |
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264 | // MatchOccurence in this sequence already. Jump to the |
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265 | // next occurence if this is the case. |
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266 | // This is no more neccessary once the matches are |
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267 | // harmonized. |
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268 | for (Iterator<MatchOccurence> jt = replacedOccurences |
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269 | .get(oc.getSequenceId()).iterator(); jt |
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270 | .hasNext();) { |
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271 | MatchOccurence tmpOC = jt.next(); |
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272 | |
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273 | if (oc.getStartindex() >= tmpOC.getStartindex() && oc.getStartindex()<=tmpOC.getEndindex()) { |
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274 | continue invalidOccurence; |
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275 | } |
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276 | if (oc.getEndindex()>=tmpOC.getStartindex()) { |
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277 | continue invalidOccurence; |
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278 | |
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279 | } |
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280 | else if (oc.getStartindex()>tmpOC.getEndindex()) { |
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281 | int diff = tmpOC.getEndindex() |
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282 | - tmpOC.getStartindex(); |
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283 | // Just to be sure. |
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284 | if (diff > 0) { |
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285 | oc.setStartindex(oc.getStartindex() - diff+1); |
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286 | oc.setEndindex(oc.getEndindex() - diff+1); |
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287 | } else { |
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288 | Console.traceln(Level.WARNING, |
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289 | "End index of a Match before start. This should never happen"); |
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290 | } |
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291 | } |
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292 | } |
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293 | } |
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294 | ISequenceInstance sequenceInstances = RuleUtils |
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295 | .createNewSubSequenceInRange( |
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296 | sessions.get(oc.getSequenceId()), |
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297 | oc.getStartindex(), oc.getEndindex(), task, |
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298 | taskFactory, taskBuilder); |
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299 | // Adjust the length of the match regarding to the length of |
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300 | // instance. (OptionalInstances may be shorter) |
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301 | oc.setEndindex(oc.getStartindex() |
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302 | + sequenceInstances.size() |
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303 | - RuleUtils.missedOptionals); |
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304 | replacedOccurences.get(oc.getSequenceId()).add(oc); |
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305 | } |
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306 | } |
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307 | } |
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308 | |
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309 | alignments = null; |
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310 | |
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311 | do { |
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312 | |
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313 | appData.getStopWatch().start("whole loop"); // |
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314 | detectAndReplaceIterations(appData); |
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315 | |
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316 | appData.getStopWatch().start("task replacement"); // |
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317 | // detectAndReplaceTasks(appData); // |
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318 | appData.getStopWatch().stop("task replacement"); // |
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319 | appData.getStopWatch().stop("whole loop"); |
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320 | |
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321 | appData.getStopWatch().dumpStatistics(System.out); // |
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322 | appData.getStopWatch().reset(); |
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323 | |
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324 | } while (appData.detectedAndReplacedTasks()); |
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325 | |
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326 | Console.println("created " |
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327 | + appData.getResult().getNewlyCreatedTasks().size() |
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328 | + " new tasks and " |
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329 | + appData.getResult().getNewlyCreatedTaskInstances().size() |
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330 | + " appropriate instances\n"); |
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331 | |
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332 | if ((appData.getResult().getNewlyCreatedTasks().size() > 0) |
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333 | || (appData.getResult().getNewlyCreatedTaskInstances().size() > 0)) { |
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334 | appData.getResult().setRuleApplicationStatus( |
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335 | RuleApplicationStatus.FINISHED); |
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336 | } |
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337 | |
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338 | return appData.getResult(); |
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339 | } |
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340 | |
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341 | |
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342 | /** |
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343 | * <p> |
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344 | * harmonizes the event task instances by unifying tasks. This is done, as |
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345 | * initially the event tasks being equal with respect to the considered task |
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346 | * equality are distinct objects. The comparison of these distinct objects |
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347 | * is more time consuming than comparing the object references. |
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348 | * </p> |
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349 | * |
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350 | * @param appData |
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351 | * the rule application data combining all data used for applying |
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352 | * this rule |
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353 | * @return Returns the unique tasks symbol map |
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354 | */ |
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355 | private SymbolMap<ITaskInstance, ITask> harmonizeEventTaskInstancesModel( |
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356 | RuleApplicationData appData) { |
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357 | Console.traceln(Level.INFO, |
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358 | "harmonizing task model of event task instances"); |
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359 | appData.getStopWatch().start("harmonizing event tasks"); |
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360 | |
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361 | SymbolMap<ITaskInstance, ITask> uniqueTasks = preparationTaskHandlingStrategy |
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362 | .createSymbolMap(); |
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363 | TaskInstanceComparator comparator = preparationTaskHandlingStrategy |
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364 | .getTaskComparator(); |
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365 | |
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366 | int unifiedTasks = 0; |
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367 | ITask task; |
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368 | List<IUserSession> sessions = appData.getSessions(); |
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369 | for (int j = 0; j < sessions.size(); j++) { |
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370 | IUserSession session = sessions.get(j); |
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371 | |
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372 | NumberSequence templist = new NumberSequence(session.size()); |
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373 | |
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374 | for (int i = 0; i < session.size(); i++) { |
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375 | ITaskInstance taskInstance = session.get(i); |
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376 | task = uniqueTasks.getValue(taskInstance); |
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377 | |
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378 | if (task == null) { |
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379 | uniqueTasks.addSymbol(taskInstance, taskInstance.getTask()); |
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380 | templist.getSequence()[i] = taskInstance.getTask().getId(); |
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381 | |
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382 | } else { |
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383 | taskBuilder.setTask(taskInstance, task); |
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384 | templist.getSequence()[i] = task.getId(); |
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385 | unifiedTasks++; |
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386 | } |
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387 | appData.getNumber2Task().put(templist.getSequence()[i], |
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388 | taskInstance.getTask()); |
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389 | |
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390 | // if(j==1) { |
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391 | // System.out.println(i + ": TaskID: " + |
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392 | // taskInstance.getTask().getId()+ " Numbersequence: " + |
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393 | // templist.getSequence()[i]); |
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394 | // } |
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395 | |
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396 | } |
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397 | // Each NumberSequence is identified by its id, beginning to count |
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398 | // at zero |
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399 | templist.setId(j); |
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400 | appData.getNumberSequences().add(templist); |
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401 | comparator.clearBuffers(); |
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402 | } |
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403 | |
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404 | appData.getStopWatch().stop("harmonizing event tasks"); |
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405 | Console.traceln(Level.INFO, "harmonized " + unifiedTasks |
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406 | + " task occurrences (still " + uniqueTasks.size() |
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407 | + " different tasks)"); |
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408 | |
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409 | appData.getStopWatch().dumpStatistics(System.out); |
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410 | appData.getStopWatch().reset(); |
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411 | return uniqueTasks; |
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412 | } |
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413 | |
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414 | /** |
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415 | * <p> |
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416 | * searches for direct iterations of single tasks in all sequences and |
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417 | * replaces them with {@link IIteration}s, respectively appropriate |
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418 | * instances. Also all single occurrences of a task that is iterated |
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419 | * somewhen are replaced with iterations to have again an efficient way for |
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420 | * task comparisons. |
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421 | * </p> |
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422 | * |
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423 | * @param appData |
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424 | * the rule application data combining all data used for applying |
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425 | * this rule |
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426 | */ |
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427 | private void detectAndReplaceIterations(RuleApplicationData appData) { |
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428 | Console.traceln(Level.FINE, "detecting iterations"); |
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429 | appData.getStopWatch().start("detecting iterations"); |
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430 | |
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431 | List<IUserSession> sessions = appData.getSessions(); |
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432 | |
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433 | Set<ITask> iteratedTasks = searchIteratedTasks(sessions); |
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434 | |
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435 | if (iteratedTasks.size() > 0) { |
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436 | replaceIterationsOf(iteratedTasks, sessions, appData); |
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437 | } |
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438 | |
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439 | appData.getStopWatch().stop("detecting iterations"); |
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440 | Console.traceln(Level.INFO, "replaced " + iteratedTasks.size() |
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441 | + " iterated tasks"); |
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442 | } |
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443 | |
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444 | /** |
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445 | * <p> |
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446 | * searches the provided sessions for task iterations. If a task is |
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447 | * iterated, it is added to the returned set. |
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448 | * </p> |
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449 | * |
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450 | * @param the |
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451 | * session to search for iterations in |
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452 | * |
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453 | * @return a set of tasks being iterated somewhere |
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454 | */ |
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455 | private Set<ITask> searchIteratedTasks(List<IUserSession> sessions) { |
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456 | Set<ITask> iteratedTasks = new HashSet<ITask>(); |
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457 | for (IUserSession session : sessions) { |
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458 | for (int i = 0; i < (session.size() - 1); i++) { |
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459 | // we prepared the task instances to refer to unique tasks, if |
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460 | // they are treated |
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461 | // as equal. Therefore, we just compare the identity of the |
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462 | // tasks of the task |
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463 | // instances |
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464 | if (session.get(i).getTask() == session.get(i + 1).getTask()) { |
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465 | iteratedTasks.add(session.get(i).getTask()); |
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466 | } |
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467 | } |
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468 | } |
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469 | |
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470 | return iteratedTasks; |
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471 | } |
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472 | |
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473 | /** |
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474 | * <p> |
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475 | * replaces all occurrences of all tasks provided in the set with iterations |
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476 | * </p> |
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477 | * |
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478 | * @param iteratedTasks |
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479 | * the tasks to be replaced with iterations |
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480 | * @param sessions |
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481 | * the sessions in which the tasks are to be replaced |
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482 | * @param appData |
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483 | * the rule application data combining all data used for applying |
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484 | * this rule |
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485 | */ |
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486 | private void replaceIterationsOf(Set<ITask> iteratedTasks, |
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487 | List<IUserSession> sessions, RuleApplicationData appData) { |
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488 | Map<ITask, IIteration> iterations = new HashMap<ITask, IIteration>(); |
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489 | Map<IIteration, List<IIterationInstance>> iterationInstances = new HashMap<IIteration, List<IIterationInstance>>(); |
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490 | |
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491 | for (ITask iteratedTask : iteratedTasks) { |
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492 | IIteration iteration = taskFactory.createNewIteration(); |
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493 | iterations.put(iteratedTask, iteration); |
---|
494 | iterationInstances.put(iteration, |
---|
495 | new LinkedList<IIterationInstance>()); |
---|
496 | } |
---|
497 | |
---|
498 | IIterationInstance iterationInstance; |
---|
499 | |
---|
500 | for (IUserSession session : sessions) { |
---|
501 | int index = 0; |
---|
502 | iterationInstance = null; |
---|
503 | |
---|
504 | while (index < session.size()) { |
---|
505 | // we prepared the task instances to refer to unique tasks, if |
---|
506 | // they are treated |
---|
507 | // as equal. Therefore, we just compare the identity of the |
---|
508 | // tasks of the task |
---|
509 | // instances |
---|
510 | ITask currentTask = session.get(index).getTask(); |
---|
511 | IIteration iteration = iterations.get(currentTask); |
---|
512 | if (iteration != null) { |
---|
513 | if ((iterationInstance == null) |
---|
514 | || (iterationInstance.getTask() != iteration)) { |
---|
515 | iterationInstance = taskFactory |
---|
516 | .createNewTaskInstance(iteration); |
---|
517 | iterationInstances.get(iteration) |
---|
518 | .add(iterationInstance); |
---|
519 | taskBuilder.addTaskInstance(session, index, |
---|
520 | iterationInstance); |
---|
521 | index++; |
---|
522 | } |
---|
523 | |
---|
524 | taskBuilder.addChild(iterationInstance, session.get(index)); |
---|
525 | taskBuilder.removeTaskInstance(session, index); |
---|
526 | } else { |
---|
527 | if (iterationInstance != null) { |
---|
528 | iterationInstance = null; |
---|
529 | } |
---|
530 | index++; |
---|
531 | } |
---|
532 | } |
---|
533 | } |
---|
534 | |
---|
535 | for (Map.Entry<IIteration, List<IIterationInstance>> entry : iterationInstances |
---|
536 | .entrySet()) { |
---|
537 | harmonizeIterationInstancesModel(entry.getKey(), entry.getValue()); |
---|
538 | } |
---|
539 | } |
---|
540 | |
---|
541 | ISequence matchAsSequence(RuleApplicationData appData, Match m) { |
---|
542 | |
---|
543 | ISequence sequence = taskFactory.createNewSequence(); |
---|
544 | |
---|
545 | int[] first = m.getFirstSequence().getSequence(); |
---|
546 | int[] second = m.getSecondSequence().getSequence(); |
---|
547 | |
---|
548 | // Both sequences of a match are equally long |
---|
549 | for (int i = 0; i < m.getFirstSequence().size(); i++) { |
---|
550 | |
---|
551 | // Two gaps aligned to each other: Have not seen it happening so |
---|
552 | // far, just to handle it |
---|
553 | if (first[i] == -1 && second[i] == -1) { |
---|
554 | // TODO: Do nothing? |
---|
555 | } |
---|
556 | // Both events are equal, we can simply add the task referring to |
---|
557 | // the number |
---|
558 | else if (first[i] == second[i]) { |
---|
559 | taskBuilder.addChild(sequence, |
---|
560 | appData.getNumber2Task().get(first[i])); |
---|
561 | } |
---|
562 | // We have a gap in the first sequence, we need to add the task of |
---|
563 | // the second sequence as optional |
---|
564 | else if (first[i] == -1 && second[i] != -1) { |
---|
565 | IOptional optional = taskFactory.createNewOptional(); |
---|
566 | taskBuilder.setMarkedTask(optional, appData.getNumber2Task() |
---|
567 | .get(second[i])); |
---|
568 | taskBuilder.addChild(sequence, optional); |
---|
569 | } |
---|
570 | // We have a gap in the second sequence, we need to add the task of |
---|
571 | // the first sequence as optional |
---|
572 | else if (first[i] != -1 && second[i] == -1) { |
---|
573 | IOptional optional = taskFactory.createNewOptional(); |
---|
574 | taskBuilder.setMarkedTask(optional, appData.getNumber2Task() |
---|
575 | .get(first[i])); |
---|
576 | taskBuilder.addChild(sequence, optional); |
---|
577 | } |
---|
578 | // Both tasks are unequal, we need to insert a selection here |
---|
579 | else { |
---|
580 | ISelection selection = taskFactory.createNewSelection(); |
---|
581 | taskBuilder.addChild(selection, |
---|
582 | appData.getNumber2Task().get(first[i])); |
---|
583 | taskBuilder.addChild(selection, |
---|
584 | appData.getNumber2Task().get(second[i])); |
---|
585 | taskBuilder.addChild(sequence, selection); |
---|
586 | } |
---|
587 | } |
---|
588 | |
---|
589 | // TODO: Debug output |
---|
590 | /* |
---|
591 | * for (int i =0;i<sequence.getChildren().size();i++) { |
---|
592 | * System.out.println(sequence.getChildren().get(i)); |
---|
593 | * |
---|
594 | * if(sequence.getChildren().get(i).getType() == "selection") { for(int |
---|
595 | * j=0; j< ((ISelection) |
---|
596 | * sequence.getChildren().get(i)).getChildren().size();j++) { |
---|
597 | * System.out.println("\t" +((ISelection) |
---|
598 | * sequence.getChildren().get(i)).getChildren().get(j)); } } } |
---|
599 | */ |
---|
600 | return sequence; |
---|
601 | } |
---|
602 | |
---|
603 | /** |
---|
604 | * <p> |
---|
605 | * TODO clarify why this is done |
---|
606 | * </p> |
---|
607 | */ |
---|
608 | private void harmonizeIterationInstancesModel(IIteration iteration, |
---|
609 | List<IIterationInstance> iterationInstances) { |
---|
610 | List<ITask> iteratedTaskVariants = new LinkedList<ITask>(); |
---|
611 | TaskInstanceComparator comparator = preparationTaskHandlingStrategy |
---|
612 | .getTaskComparator(); |
---|
613 | |
---|
614 | // merge the lexically different variants of iterated task to a unique |
---|
615 | // list |
---|
616 | for (IIterationInstance iterationInstance : iterationInstances) { |
---|
617 | for (ITaskInstance executionVariant : iterationInstance) { |
---|
618 | ITask candidate = executionVariant.getTask(); |
---|
619 | |
---|
620 | boolean found = false; |
---|
621 | for (ITask taskVariant : iteratedTaskVariants) { |
---|
622 | if (comparator.areLexicallyEqual(taskVariant, candidate)) { |
---|
623 | taskBuilder.setTask(executionVariant, taskVariant); |
---|
624 | found = true; |
---|
625 | break; |
---|
626 | } |
---|
627 | } |
---|
628 | |
---|
629 | if (!found) { |
---|
630 | iteratedTaskVariants.add(candidate); |
---|
631 | } |
---|
632 | } |
---|
633 | } |
---|
634 | |
---|
635 | // if there are more than one lexically different variant of iterated |
---|
636 | // tasks, adapt the |
---|
637 | // iteration model to be a selection of different variants. In this case |
---|
638 | // also adapt |
---|
639 | // the generated iteration instances to correctly contain selection |
---|
640 | // instances. If there |
---|
641 | // is only one variant of an iterated task, simply set this as the |
---|
642 | // marked task of the |
---|
643 | // iteration. In this case, the instances can be preserved as is |
---|
644 | if (iteratedTaskVariants.size() > 1) { |
---|
645 | ISelection selection = taskFactory.createNewSelection(); |
---|
646 | |
---|
647 | for (ITask variant : iteratedTaskVariants) { |
---|
648 | taskBuilder.addChild(selection, variant); |
---|
649 | } |
---|
650 | |
---|
651 | taskBuilder.setMarkedTask(iteration, selection); |
---|
652 | |
---|
653 | for (IIterationInstance instance : iterationInstances) { |
---|
654 | for (int i = 0; i < instance.size(); i++) { |
---|
655 | ISelectionInstance selectionInstance = taskFactory |
---|
656 | .createNewTaskInstance(selection); |
---|
657 | taskBuilder.setChild(selectionInstance, instance.get(i)); |
---|
658 | taskBuilder.setTaskInstance(instance, i, selectionInstance); |
---|
659 | } |
---|
660 | } |
---|
661 | } else { |
---|
662 | taskBuilder.setMarkedTask(iteration, iteratedTaskVariants.get(0)); |
---|
663 | } |
---|
664 | } |
---|
665 | |
---|
666 | /** |
---|
667 | * TODO go on commenting |
---|
668 | * |
---|
669 | * @param appData |
---|
670 | * the rule application data combining all data used for applying |
---|
671 | * this rule |
---|
672 | */ |
---|
673 | private void detectAndReplaceTasks(RuleApplicationData appData) { |
---|
674 | Console.traceln(Level.FINE, "detecting and replacing tasks"); |
---|
675 | appData.getStopWatch().start("detecting tasks"); |
---|
676 | |
---|
677 | // getSequencesOccuringMostOften(appData); |
---|
678 | |
---|
679 | appData.getStopWatch().stop("detecting tasks"); |
---|
680 | appData.getStopWatch().start("replacing tasks"); |
---|
681 | |
---|
682 | replaceSequencesOccurringMostOften(appData); |
---|
683 | |
---|
684 | appData.getStopWatch().stop("replacing tasks"); |
---|
685 | |
---|
686 | // Console.traceln(Level.INFO, "detected and replaced " |
---|
687 | // + appData.getLastFoundTasks().size() + " tasks occuring " |
---|
688 | // + appData.getLastFoundTasks().getOccurrenceCount() + " times"); |
---|
689 | } |
---|
690 | |
---|
691 | /** |
---|
692 | * @param appData |
---|
693 | * the rule application data combining all data used for applying |
---|
694 | * this rule |
---|
695 | */ |
---|
696 | private void replaceSequencesOccurringMostOften(RuleApplicationData appData) { |
---|
697 | appData.detectedAndReplacedTasks(false); |
---|
698 | |
---|
699 | /* |
---|
700 | * Console.traceln(Level.FINER, "replacing tasks occurrences"); |
---|
701 | * |
---|
702 | * for (List<ITaskInstance> task : appData.getLastFoundTasks()) { |
---|
703 | * ISequence sequence = taskFactory.createNewSequence(); |
---|
704 | * |
---|
705 | * Console.traceln(Level.FINEST, "replacing " + sequence.getId() + ": " |
---|
706 | * + task); |
---|
707 | * |
---|
708 | * List<ISequenceInstance> sequenceInstances = replaceTaskOccurrences( |
---|
709 | * task, appData.getSessions(), sequence); |
---|
710 | * |
---|
711 | * harmonizeSequenceInstancesModel(sequence, sequenceInstances, |
---|
712 | * task.size()); appData.detectedAndReplacedTasks(appData |
---|
713 | * .detectedAndReplacedTasks() || (sequenceInstances.size() > 0)); |
---|
714 | * |
---|
715 | * if (sequenceInstances.size() < appData.getLastFoundTasks() |
---|
716 | * .getOccurrenceCount()) { Console.traceln(Level.FINE, sequence.getId() |
---|
717 | * + ": replaced task only " + sequenceInstances.size() + |
---|
718 | * " times instead of expected " + appData.getLastFoundTasks() |
---|
719 | * .getOccurrenceCount()); } } |
---|
720 | */ |
---|
721 | } |
---|
722 | |
---|
723 | /** |
---|
724 | * |
---|
725 | */ |
---|
726 | private void harmonizeSequenceInstancesModel(ISequence sequence, |
---|
727 | List<ISequenceInstance> sequenceInstances, int sequenceLength) { |
---|
728 | TaskInstanceComparator comparator = preparationTaskHandlingStrategy |
---|
729 | .getTaskComparator(); |
---|
730 | |
---|
731 | // ensure for each subtask that lexically different variants are |
---|
732 | // preserved |
---|
733 | for (int subTaskIndex = 0; subTaskIndex < sequenceLength; subTaskIndex++) { |
---|
734 | List<ITask> subTaskVariants = new LinkedList<ITask>(); |
---|
735 | |
---|
736 | for (ISequenceInstance sequenceInstance : sequenceInstances) { |
---|
737 | ITask candidate = sequenceInstance.get(subTaskIndex).getTask(); |
---|
738 | |
---|
739 | boolean found = false; |
---|
740 | |
---|
741 | for (int i = 0; i < subTaskVariants.size(); i++) { |
---|
742 | if (comparator.areLexicallyEqual(subTaskVariants.get(i), |
---|
743 | candidate)) { |
---|
744 | taskBuilder.setTask(sequenceInstance.get(subTaskIndex), |
---|
745 | subTaskVariants.get(i)); |
---|
746 | |
---|
747 | found = true; |
---|
748 | break; |
---|
749 | } |
---|
750 | } |
---|
751 | |
---|
752 | if (!found) { |
---|
753 | subTaskVariants.add(candidate); |
---|
754 | } |
---|
755 | } |
---|
756 | |
---|
757 | // if there are more than one lexically different variant of the sub |
---|
758 | // task at |
---|
759 | // the considered position, adapt the sequence model at that |
---|
760 | // position to have |
---|
761 | // a selection of the different variants. In this case also adapt |
---|
762 | // the |
---|
763 | // generated sequence instances to correctly contain selection |
---|
764 | // instances. If |
---|
765 | // there is only one variant of sub tasks at the given position, |
---|
766 | // simply set |
---|
767 | // this variant as the sub task of the selection. In this case, the |
---|
768 | // instances |
---|
769 | // can be preserved as is |
---|
770 | if (subTaskVariants.size() > 1) { |
---|
771 | ISelection selection = taskFactory.createNewSelection(); |
---|
772 | |
---|
773 | for (ITask variant : subTaskVariants) { |
---|
774 | taskBuilder.addChild(selection, variant); |
---|
775 | } |
---|
776 | |
---|
777 | taskBuilder.addChild(sequence, selection); |
---|
778 | |
---|
779 | for (ISequenceInstance instance : sequenceInstances) { |
---|
780 | ISelectionInstance selectionInstance = taskFactory |
---|
781 | .createNewTaskInstance(selection); |
---|
782 | taskBuilder.setChild(selectionInstance, |
---|
783 | instance.get(subTaskIndex)); |
---|
784 | taskBuilder.setTaskInstance(instance, subTaskIndex, |
---|
785 | selectionInstance); |
---|
786 | } |
---|
787 | } else if (subTaskVariants.size() == 1) { |
---|
788 | taskBuilder.addChild(sequence, subTaskVariants.get(0)); |
---|
789 | } |
---|
790 | } |
---|
791 | } |
---|
792 | |
---|
793 | /** |
---|
794 | * @param tree |
---|
795 | */ |
---|
796 | private List<ISequenceInstance> replaceTaskOccurrences( |
---|
797 | List<ITaskInstance> task, List<IUserSession> sessions, |
---|
798 | ISequence temporalTaskModel) { |
---|
799 | List<ISequenceInstance> sequenceInstances = new LinkedList<ISequenceInstance>(); |
---|
800 | |
---|
801 | for (IUserSession session : sessions) { |
---|
802 | int index = -1; |
---|
803 | |
---|
804 | do { |
---|
805 | index = getSubListIndex(session, task, ++index); |
---|
806 | |
---|
807 | if (index > -1) { |
---|
808 | sequenceInstances.add(RuleUtils |
---|
809 | .createNewSubSequenceInRange(session, index, index |
---|
810 | + task.size() - 1, temporalTaskModel, |
---|
811 | taskFactory, taskBuilder)); |
---|
812 | } |
---|
813 | } while (index > -1); |
---|
814 | } |
---|
815 | |
---|
816 | return sequenceInstances; |
---|
817 | } |
---|
818 | |
---|
819 | /** |
---|
820 | * @param trie |
---|
821 | * @param object |
---|
822 | * @return |
---|
823 | */ |
---|
824 | private int getSubListIndex(ITaskInstanceList list, |
---|
825 | List<ITaskInstance> subList, int startIndex) { |
---|
826 | boolean matchFound; |
---|
827 | int result = -1; |
---|
828 | |
---|
829 | for (int i = startIndex; i <= list.size() - subList.size(); i++) { |
---|
830 | matchFound = true; |
---|
831 | |
---|
832 | for (int j = 0; j < subList.size(); j++) { |
---|
833 | // we prepared the task instances to refer to unique tasks, if |
---|
834 | // they are treated |
---|
835 | // as equal. Therefore, we just compare the identity of the |
---|
836 | // tasks of the task |
---|
837 | // instances |
---|
838 | if (list.get(i + j).getTask() != subList.get(j).getTask()) { |
---|
839 | matchFound = false; |
---|
840 | break; |
---|
841 | } |
---|
842 | } |
---|
843 | |
---|
844 | if (matchFound) { |
---|
845 | result = i; |
---|
846 | break; |
---|
847 | } |
---|
848 | } |
---|
849 | |
---|
850 | return result; |
---|
851 | } |
---|
852 | |
---|
853 | /** |
---|
854 | * |
---|
855 | */ |
---|
856 | private static class RuleApplicationData { |
---|
857 | |
---|
858 | private HashMap<Integer, ITask> number2task; |
---|
859 | |
---|
860 | private ArrayList<NumberSequence> numberseqs; |
---|
861 | |
---|
862 | /** |
---|
863 | * |
---|
864 | */ |
---|
865 | private List<IUserSession> sessions; |
---|
866 | |
---|
867 | /** |
---|
868 | * |
---|
869 | */ |
---|
870 | private boolean detectedAndReplacedTasks; |
---|
871 | |
---|
872 | /** |
---|
873 | * |
---|
874 | */ |
---|
875 | private RuleApplicationResult result; |
---|
876 | |
---|
877 | /** |
---|
878 | * |
---|
879 | */ |
---|
880 | private StopWatch stopWatch; |
---|
881 | |
---|
882 | /** |
---|
883 | * |
---|
884 | */ |
---|
885 | private RuleApplicationData(List<IUserSession> sessions) { |
---|
886 | this.sessions = sessions; |
---|
887 | numberseqs = new ArrayList<NumberSequence>(); |
---|
888 | number2task = new HashMap<Integer, ITask>(); |
---|
889 | stopWatch = new StopWatch(); |
---|
890 | result = new RuleApplicationResult(); |
---|
891 | } |
---|
892 | |
---|
893 | /** |
---|
894 | * @return the tree |
---|
895 | */ |
---|
896 | private List<IUserSession> getSessions() { |
---|
897 | return sessions; |
---|
898 | } |
---|
899 | |
---|
900 | private ArrayList<NumberSequence> getNumberSequences() { |
---|
901 | return numberseqs; |
---|
902 | } |
---|
903 | |
---|
904 | /** |
---|
905 | * |
---|
906 | */ |
---|
907 | private void detectedAndReplacedTasks(boolean detectedAndReplacedTasks) { |
---|
908 | this.detectedAndReplacedTasks = detectedAndReplacedTasks; |
---|
909 | } |
---|
910 | |
---|
911 | /** |
---|
912 | * |
---|
913 | */ |
---|
914 | private boolean detectedAndReplacedTasks() { |
---|
915 | return detectedAndReplacedTasks; |
---|
916 | } |
---|
917 | |
---|
918 | /** |
---|
919 | * @return the result |
---|
920 | */ |
---|
921 | private RuleApplicationResult getResult() { |
---|
922 | return result; |
---|
923 | } |
---|
924 | |
---|
925 | /** |
---|
926 | * @return the stopWatch |
---|
927 | */ |
---|
928 | private StopWatch getStopWatch() { |
---|
929 | return stopWatch; |
---|
930 | } |
---|
931 | |
---|
932 | private HashMap<Integer, ITask> getNumber2Task() { |
---|
933 | return number2task; |
---|
934 | } |
---|
935 | |
---|
936 | } |
---|
937 | |
---|
938 | } |
---|