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 | |
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18 | import java.util.ArrayList; |
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19 | import java.util.HashMap; |
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20 | import java.util.HashSet; |
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21 | import java.util.Iterator; |
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22 | import java.util.LinkedList; |
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23 | import java.util.List; |
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24 | import java.util.Map; |
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25 | import java.util.Set; |
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26 | import java.util.logging.Level; |
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27 | |
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28 | import de.ugoe.cs.autoquest.tasktrees.alignment.algorithms.AlignmentAlgorithm; |
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29 | import de.ugoe.cs.autoquest.tasktrees.alignment.algorithms.AlignmentAlgorithmFactory; |
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30 | import de.ugoe.cs.autoquest.tasktrees.alignment.algorithms.NumberSequence; |
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31 | import de.ugoe.cs.autoquest.tasktrees.alignment.matrix.PairwiseAlignmentGenerator; |
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32 | import de.ugoe.cs.autoquest.tasktrees.alignment.matrix.PairwiseAlignmentStorage; |
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33 | import de.ugoe.cs.autoquest.tasktrees.alignment.matrix.ObjectDistanceSubstitionMatrix; |
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34 | import de.ugoe.cs.autoquest.tasktrees.alignment.pal.tree.UPGMAAligningTree; |
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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.ISelection; |
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39 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ISelectionInstance; |
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40 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ISequence; |
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41 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ISequenceInstance; |
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42 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITask; |
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43 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskBuilder; |
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44 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskFactory; |
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45 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstance; |
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46 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstanceList; |
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47 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IUserSession; |
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48 | import de.ugoe.cs.autoquest.usageprofiles.SymbolMap; |
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49 | import de.ugoe.cs.autoquest.usageprofiles.TrieProcessor; |
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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 an trie generation, i.e., after the tasks are |
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98 | * harmonized |
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99 | * </p> |
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100 | */ |
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101 | private TaskHandlingStrategy identityTaskHandlingStrategy;; |
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102 | |
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103 | private ArrayList<NumberSequence> numberseqs; |
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104 | |
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105 | /** |
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106 | * <p> |
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107 | * instantiates the rule and initializes it with a task equality to be |
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108 | * considered when comparing tasks as well as a task factory and builder to |
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109 | * be used for creating task structures. |
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110 | * </p> |
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111 | * |
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112 | * @param minimalTaskEquality |
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113 | * the task equality to be considered when comparing tasks |
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114 | * @param taskFactory |
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115 | * the task factory to be used for creating substructures |
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116 | * @param taskBuilder |
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117 | * the task builder to be used for creating substructures |
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118 | */ |
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119 | |
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120 | SequenceForTaskDetectionRuleAlignment(TaskEquality minimalTaskEquality, |
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121 | ITaskFactory taskFactory, ITaskBuilder taskBuilder) { |
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122 | this.taskFactory = taskFactory; |
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123 | this.taskBuilder = taskBuilder; |
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124 | |
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125 | this.preparationTaskHandlingStrategy = new TaskHandlingStrategy( |
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126 | minimalTaskEquality); |
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127 | this.identityTaskHandlingStrategy = new TaskHandlingStrategy( |
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128 | TaskEquality.IDENTICAL); |
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129 | numberseqs = new ArrayList<NumberSequence>(); |
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130 | |
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131 | } |
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132 | |
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133 | /* |
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134 | * (non-Javadoc) |
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135 | * |
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136 | * @see java.lang.Object#toString() |
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137 | */ |
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138 | @Override |
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139 | public String toString() { |
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140 | return "SequenceForTaskDetectionRuleAlignment"; |
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141 | } |
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142 | |
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143 | /* |
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144 | * (non-Javadoc) |
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145 | * |
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146 | * @see |
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147 | * de.ugoe.cs.autoquest.tasktrees.temporalrelation.ISessionScopeRule#apply |
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148 | * (java.util.List) |
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149 | */ |
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150 | @Override |
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151 | public RuleApplicationResult apply(List<IUserSession> sessions) { |
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152 | RuleApplicationData appData = new RuleApplicationData(sessions); |
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153 | |
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154 | // this is the real rule application. Loop while something is replaced. |
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155 | SymbolMap<ITaskInstance, ITask> uniqueTasks = harmonizeEventTaskInstancesModel(appData); |
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156 | |
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157 | ObjectDistanceSubstitionMatrix submat = new ObjectDistanceSubstitionMatrix( |
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158 | uniqueTasks, 5); |
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159 | submat.generate(); |
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160 | |
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161 | |
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162 | PairwiseAlignmentStorage alignments = PairwiseAlignmentGenerator.generate(numberseqs,submat); |
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163 | |
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164 | |
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165 | System.out.println(alignments.getDistanceMatrix()); |
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166 | //UPGMAAligningTree guidetree = new UPGMAAligningTree(numberseqs, alignments,submat); |
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167 | |
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168 | |
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169 | |
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170 | |
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171 | /* |
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172 | do { |
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173 | |
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174 | // appData.getStopWatch().start("whole loop"); |
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175 | // detectAndReplaceIterations(appData); |
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176 | |
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177 | // appData.getStopWatch().start("task replacement"); |
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178 | // detectAndReplaceTasks(appData); |
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179 | // appData.getStopWatch().stop("task replacement"); |
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180 | // appData.getStopWatch().stop("whole loop"); |
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181 | |
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182 | // appData.getStopWatch().dumpStatistics(System.out); |
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183 | // appData.getStopWatch().reset(); |
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184 | |
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185 | } while (appData.detectedAndReplacedTasks()); */ |
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186 | |
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187 | Console.println("created " |
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188 | + appData.getResult().getNewlyCreatedTasks().size() |
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189 | + " new tasks and " |
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190 | + appData.getResult().getNewlyCreatedTaskInstances().size() |
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191 | + " appropriate instances\n"); |
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192 | |
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193 | if ((appData.getResult().getNewlyCreatedTasks().size() > 0) |
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194 | || (appData.getResult().getNewlyCreatedTaskInstances().size() > 0)) { |
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195 | appData.getResult().setRuleApplicationStatus( |
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196 | RuleApplicationStatus.FINISHED); |
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197 | } |
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198 | |
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199 | return appData.getResult(); |
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200 | } |
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201 | |
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202 | /** |
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203 | * <p> |
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204 | * harmonizes the event task instances by unifying tasks. This is done, as |
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205 | * initially the event tasks being equal with respect to the considered task |
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206 | * equality are distinct objects. The comparison of these distinct objects |
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207 | * is more time consuming than comparing the object references. |
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208 | * </p> |
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209 | * |
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210 | * @param appData |
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211 | * the rule application data combining all data used for applying |
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212 | * this rule |
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213 | * @return Returns the unique tasks symbol map |
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214 | */ |
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215 | private SymbolMap<ITaskInstance, ITask> harmonizeEventTaskInstancesModel( |
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216 | RuleApplicationData appData) { |
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217 | Console.traceln(Level.INFO, |
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218 | "harmonizing task model of event task instances"); |
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219 | appData.getStopWatch().start("harmonizing event tasks"); |
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220 | |
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221 | SymbolMap<ITaskInstance, ITask> uniqueTasks = preparationTaskHandlingStrategy |
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222 | .createSymbolMap(); |
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223 | TaskInstanceComparator comparator = preparationTaskHandlingStrategy |
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224 | .getTaskComparator(); |
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225 | |
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226 | int unifiedTasks = 0; |
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227 | ITask task; |
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228 | List<IUserSession> sessions = appData.getSessions(); |
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229 | int sessionNo = 0; |
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230 | numberseqs = new ArrayList<NumberSequence>(); |
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231 | for (IUserSession session : sessions) { |
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232 | Console.traceln(Level.FINE, "handling " + (++sessionNo) + ". " |
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233 | + session); |
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234 | NumberSequence templist = new NumberSequence(session.size()); |
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235 | |
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236 | for (int i = 0; i < session.size(); i++) { |
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237 | ITaskInstance taskInstance = session.get(i); |
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238 | task = uniqueTasks.getValue(taskInstance); |
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239 | |
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240 | if (task == null) { |
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241 | uniqueTasks.addSymbol(taskInstance, taskInstance.getTask()); |
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242 | templist.getSequence()[i] = taskInstance.getTask().getId(); |
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243 | } else { |
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244 | taskBuilder.setTask(taskInstance, task); |
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245 | templist.getSequence()[i] = task.getId(); |
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246 | unifiedTasks++; |
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247 | } |
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248 | } |
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249 | numberseqs.add(templist); |
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250 | comparator.clearBuffers(); |
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251 | } |
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252 | |
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253 | appData.getStopWatch().stop("harmonizing event tasks"); |
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254 | Console.traceln(Level.INFO, "harmonized " + unifiedTasks |
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255 | + " task occurrences (still " + uniqueTasks.size() |
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256 | + " different tasks)"); |
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257 | |
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258 | appData.getStopWatch().dumpStatistics(System.out); |
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259 | appData.getStopWatch().reset(); |
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260 | return uniqueTasks; |
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261 | } |
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262 | |
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263 | /** |
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264 | * <p> |
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265 | * searches for direct iterations of single tasks in all sequences and |
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266 | * replaces them with {@link IIteration}s, respectively appropriate |
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267 | * instances. Also all single occurrences of a task that is iterated |
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268 | * somewhen are replaced with iterations to have again an efficient way for |
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269 | * task comparisons. |
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270 | * </p> |
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271 | * |
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272 | * @param appData |
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273 | * the rule application data combining all data used for applying |
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274 | * this rule |
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275 | */ |
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276 | private void detectAndReplaceIterations(RuleApplicationData appData) { |
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277 | Console.traceln(Level.FINE, "detecting iterations"); |
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278 | appData.getStopWatch().start("detecting iterations"); |
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279 | |
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280 | List<IUserSession> sessions = appData.getSessions(); |
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281 | |
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282 | Set<ITask> iteratedTasks = searchIteratedTasks(sessions); |
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283 | |
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284 | if (iteratedTasks.size() > 0) { |
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285 | replaceIterationsOf(iteratedTasks, sessions, appData); |
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286 | } |
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287 | |
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288 | appData.getStopWatch().stop("detecting iterations"); |
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289 | Console.traceln(Level.INFO, "replaced " + iteratedTasks.size() |
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290 | + " iterated tasks"); |
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291 | } |
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292 | |
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293 | /** |
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294 | * <p> |
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295 | * searches the provided sessions for task iterations. If a task is |
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296 | * iterated, it is added to the returned set. |
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297 | * </p> |
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298 | * |
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299 | * @param the |
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300 | * session to search for iterations in |
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301 | * |
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302 | * @return a set of tasks being iterated somewhere |
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303 | */ |
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304 | private Set<ITask> searchIteratedTasks(List<IUserSession> sessions) { |
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305 | Set<ITask> iteratedTasks = new HashSet<ITask>(); |
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306 | for (IUserSession session : sessions) { |
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307 | for (int i = 0; i < (session.size() - 1); i++) { |
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308 | // we prepared the task instances to refer to unique tasks, if |
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309 | // they are treated |
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310 | // as equal. Therefore, we just compare the identity of the |
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311 | // tasks of the task |
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312 | // instances |
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313 | if (session.get(i).getTask() == session.get(i + 1).getTask()) { |
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314 | iteratedTasks.add(session.get(i).getTask()); |
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315 | } |
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316 | } |
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317 | } |
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318 | |
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319 | return iteratedTasks; |
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320 | } |
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321 | |
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322 | /** |
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323 | * <p> |
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324 | * replaces all occurrences of all tasks provided in the set with iterations |
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325 | * </p> |
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326 | * |
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327 | * @param iteratedTasks |
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328 | * the tasks to be replaced with iterations |
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329 | * @param sessions |
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330 | * the sessions in which the tasks are to be replaced |
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331 | * @param appData |
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332 | * the rule application data combining all data used for applying |
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333 | * this rule |
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334 | */ |
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335 | private void replaceIterationsOf(Set<ITask> iteratedTasks, |
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336 | List<IUserSession> sessions, RuleApplicationData appData) { |
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337 | Map<ITask, IIteration> iterations = new HashMap<ITask, IIteration>(); |
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338 | Map<IIteration, List<IIterationInstance>> iterationInstances = new HashMap<IIteration, List<IIterationInstance>>(); |
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339 | |
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340 | for (ITask iteratedTask : iteratedTasks) { |
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341 | IIteration iteration = taskFactory.createNewIteration(); |
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342 | iterations.put(iteratedTask, iteration); |
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343 | iterationInstances.put(iteration, |
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344 | new LinkedList<IIterationInstance>()); |
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345 | } |
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346 | |
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347 | IIterationInstance iterationInstance; |
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348 | |
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349 | for (IUserSession session : sessions) { |
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350 | int index = 0; |
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351 | iterationInstance = null; |
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352 | |
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353 | while (index < session.size()) { |
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354 | // we prepared the task instances to refer to unique tasks, if |
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355 | // they are treated |
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356 | // as equal. Therefore, we just compare the identity of the |
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357 | // tasks of the task |
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358 | // instances |
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359 | ITask currentTask = session.get(index).getTask(); |
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360 | IIteration iteration = iterations.get(currentTask); |
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361 | if (iteration != null) { |
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362 | if ((iterationInstance == null) |
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363 | || (iterationInstance.getTask() != iteration)) { |
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364 | iterationInstance = taskFactory |
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365 | .createNewTaskInstance(iteration); |
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366 | iterationInstances.get(iteration) |
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367 | .add(iterationInstance); |
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368 | taskBuilder.addTaskInstance(session, index, |
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369 | iterationInstance); |
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370 | index++; |
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371 | } |
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372 | |
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373 | taskBuilder.addChild(iterationInstance, session.get(index)); |
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374 | taskBuilder.removeTaskInstance(session, index); |
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375 | } else { |
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376 | if (iterationInstance != null) { |
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377 | iterationInstance = null; |
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378 | } |
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379 | index++; |
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380 | } |
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381 | } |
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382 | } |
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383 | |
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384 | for (Map.Entry<IIteration, List<IIterationInstance>> entry : iterationInstances |
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385 | .entrySet()) { |
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386 | harmonizeIterationInstancesModel(entry.getKey(), entry.getValue()); |
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387 | } |
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388 | } |
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389 | |
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390 | /** |
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391 | * <p> |
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392 | * TODO clarify why this is done |
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393 | * </p> |
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394 | */ |
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395 | private void harmonizeIterationInstancesModel(IIteration iteration, |
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396 | List<IIterationInstance> iterationInstances) { |
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397 | List<ITask> iteratedTaskVariants = new LinkedList<ITask>(); |
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398 | TaskInstanceComparator comparator = preparationTaskHandlingStrategy |
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399 | .getTaskComparator(); |
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400 | |
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401 | // merge the lexically different variants of iterated task to a unique |
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402 | // list |
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403 | for (IIterationInstance iterationInstance : iterationInstances) { |
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404 | for (ITaskInstance executionVariant : iterationInstance) { |
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405 | ITask candidate = executionVariant.getTask(); |
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406 | |
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407 | boolean found = false; |
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408 | for (ITask taskVariant : iteratedTaskVariants) { |
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409 | if (comparator.areLexicallyEqual(taskVariant, candidate)) { |
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410 | taskBuilder.setTask(executionVariant, taskVariant); |
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411 | found = true; |
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412 | break; |
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413 | } |
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414 | } |
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415 | |
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416 | if (!found) { |
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417 | iteratedTaskVariants.add(candidate); |
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418 | } |
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419 | } |
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420 | } |
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421 | |
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422 | // if there are more than one lexically different variant of iterated |
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423 | // tasks, adapt the |
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424 | // iteration model to be a selection of different variants. In this case |
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425 | // also adapt |
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426 | // the generated iteration instances to correctly contain selection |
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427 | // instances. If there |
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428 | // is only one variant of an iterated task, simply set this as the |
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429 | // marked task of the |
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430 | // iteration. In this case, the instances can be preserved as is |
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431 | if (iteratedTaskVariants.size() > 1) { |
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432 | ISelection selection = taskFactory.createNewSelection(); |
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433 | |
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434 | for (ITask variant : iteratedTaskVariants) { |
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435 | taskBuilder.addChild(selection, variant); |
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436 | } |
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437 | |
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438 | taskBuilder.setMarkedTask(iteration, selection); |
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439 | |
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440 | for (IIterationInstance instance : iterationInstances) { |
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441 | for (int i = 0; i < instance.size(); i++) { |
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442 | ISelectionInstance selectionInstance = taskFactory |
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443 | .createNewTaskInstance(selection); |
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444 | taskBuilder.setChild(selectionInstance, instance.get(i)); |
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445 | taskBuilder.setTaskInstance(instance, i, selectionInstance); |
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446 | } |
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447 | } |
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448 | } else { |
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449 | taskBuilder.setMarkedTask(iteration, iteratedTaskVariants.get(0)); |
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450 | } |
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451 | } |
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452 | |
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453 | /** |
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454 | * TODO go on commenting |
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455 | * |
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456 | * @param appData |
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457 | * the rule application data combining all data used for applying |
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458 | * this rule |
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459 | */ |
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460 | private void detectAndReplaceTasks(RuleApplicationData appData) { |
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461 | Console.traceln(Level.FINE, "detecting and replacing tasks"); |
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462 | appData.getStopWatch().start("detecting tasks"); |
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463 | |
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464 | getSequencesOccuringMostOften(appData); |
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465 | |
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466 | appData.getStopWatch().stop("detecting tasks"); |
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467 | appData.getStopWatch().start("replacing tasks"); |
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468 | |
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469 | replaceSequencesOccurringMostOften(appData); |
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470 | |
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471 | appData.getStopWatch().stop("replacing tasks"); |
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472 | Console.traceln(Level.INFO, "detected and replaced " |
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473 | + appData.getLastFoundTasks().size() + " tasks occuring " |
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474 | + appData.getLastFoundTasks().getOccurrenceCount() + " times"); |
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475 | } |
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476 | |
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477 | /** |
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478 | * @param appData |
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479 | * the rule application data combining all data used for applying |
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480 | * this rule |
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481 | */ |
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482 | private void getSequencesOccuringMostOften(RuleApplicationData appData) { |
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483 | Console.traceln(Level.FINE, "determining most prominent tasks"); |
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484 | |
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485 | Tasks tasks; |
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486 | boolean createNewTrie = (appData.getLastTrie() == null) |
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487 | || appData.detectedAndReplacedTasks(); // tree has changed |
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488 | |
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489 | do { |
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490 | if (createNewTrie) { |
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491 | createNewTrie(appData); |
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492 | } |
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493 | |
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494 | MaxCountAndLongestTasksFinder finder = new MaxCountAndLongestTasksFinder(); |
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495 | appData.getLastTrie().process(finder); |
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496 | |
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497 | tasks = finder.getFoundTasks(); |
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498 | |
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499 | createNewTrie = false; |
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500 | |
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501 | for (List<ITaskInstance> task : tasks) { |
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502 | if (task.size() >= appData.getTrainedSequenceLength()) { |
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503 | // Trie must be recreated with a longer sequence length to |
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504 | // be sure that |
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505 | // the found sequences occurring most often are found in |
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506 | // their whole length |
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507 | appData.setTrainedSequenceLength(appData |
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508 | .getTrainedSequenceLength() + 1); |
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509 | createNewTrie = true; |
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510 | break; |
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511 | } |
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512 | } |
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513 | } while (createNewTrie); |
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514 | |
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515 | // create a normal trie for comparison |
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516 | /* |
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517 | * System.out.println("creating test trie for comparison"); |
---|
518 | * |
---|
519 | * appData.getStopWatch().start("testtrie"); Trie<ITaskInstance> trie = |
---|
520 | * new Trie<ITaskInstance>(identityTaskComparator); |
---|
521 | * |
---|
522 | * for (IUserSession session : appData.getSessions()) { |
---|
523 | * trie.train(session.getExecutedTasks(), |
---|
524 | * appData.getTrainedSequenceLength()); } |
---|
525 | * |
---|
526 | * appData.getStopWatch().stop("testtrie"); |
---|
527 | * |
---|
528 | * MaxCountAndLongestTasksFinder finder = new |
---|
529 | * MaxCountAndLongestTasksFinder(); trie.process(finder); |
---|
530 | * |
---|
531 | * boolean allTasksEqual = finder.getFoundTasks().size() == |
---|
532 | * tasks.size(); |
---|
533 | * |
---|
534 | * allTasksEqual &= finder.getFoundTasks().occurrenceCount == |
---|
535 | * tasks.occurrenceCount; |
---|
536 | * |
---|
537 | * for (List<ITaskInstance> task1 : finder.getFoundTasks()) { boolean |
---|
538 | * foundTask = false; for (List<ITaskInstance> task2 : tasks) { boolean |
---|
539 | * tasksEqual = false; if (task1.size() == task2.size()) { tasksEqual = |
---|
540 | * true; for (int i = 0; i < task1.size(); i++) { if |
---|
541 | * (!identityTaskComparator.equals(task1.get(i).getTask(), |
---|
542 | * task2.get(i).getTask())) { tasksEqual = false; } } } |
---|
543 | * |
---|
544 | * if (tasksEqual) { foundTask = true; break; } } |
---|
545 | * |
---|
546 | * if (!foundTask) { System.out.println("different is " + task1); |
---|
547 | * allTasksEqual = false; break; } } |
---|
548 | * |
---|
549 | * if (!allTasksEqual) { System.out.println(finder.getFoundTasks()); |
---|
550 | * System.out.println(tasks); |
---|
551 | * |
---|
552 | * throw new |
---|
553 | * IllegalArgumentException("both tries calculated different subsequences" |
---|
554 | * ); } |
---|
555 | * |
---|
556 | * /*TrieStatisticsDumper dumper = new TrieStatisticsDumper(); |
---|
557 | * appData.getLastTrie().process(dumper); dumper.dumpCounters(); |
---|
558 | */ |
---|
559 | |
---|
560 | appData.setLastFoundTasks(tasks); |
---|
561 | |
---|
562 | Console.traceln(Level.FINE, "found " |
---|
563 | + appData.getLastFoundTasks().size() + " tasks " + "occurring " |
---|
564 | + appData.getLastFoundTasks().getOccurrenceCount() + " times"); |
---|
565 | } |
---|
566 | |
---|
567 | /** |
---|
568 | * @param appData |
---|
569 | * the rule application data combining all data used for applying |
---|
570 | * this rule |
---|
571 | */ |
---|
572 | private void createNewTrie(RuleApplicationData appData) { |
---|
573 | Console.traceln( |
---|
574 | Level.FINER, |
---|
575 | "training trie with a maximum sequence length of " |
---|
576 | + appData.getTrainedSequenceLength()); |
---|
577 | |
---|
578 | appData.getStopWatch().start("training trie"); |
---|
579 | |
---|
580 | // we prepared the task instances to refer to unique tasks, if they are |
---|
581 | // treated |
---|
582 | // as equal. Therefore, we just compare the identity of the tasks of the |
---|
583 | // task |
---|
584 | // instances |
---|
585 | appData.setLastTrie(new TaskInstanceTrie(identityTaskHandlingStrategy)); |
---|
586 | |
---|
587 | appData.getLastTrie().trainSessions(appData.getSessions(), |
---|
588 | appData.getTrainedSequenceLength()); |
---|
589 | |
---|
590 | appData.getStopWatch().stop("training trie"); |
---|
591 | } |
---|
592 | |
---|
593 | /** |
---|
594 | * @param appData |
---|
595 | * the rule application data combining all data used for applying |
---|
596 | * this rule |
---|
597 | */ |
---|
598 | private void replaceSequencesOccurringMostOften(RuleApplicationData appData) { |
---|
599 | appData.detectedAndReplacedTasks(false); |
---|
600 | |
---|
601 | if ((appData.getLastFoundTasks().size() > 0) |
---|
602 | && (appData.getLastFoundTasks().getOccurrenceCount() > 1)) { |
---|
603 | Console.traceln(Level.FINER, "replacing tasks occurrences"); |
---|
604 | |
---|
605 | for (List<ITaskInstance> task : appData.getLastFoundTasks()) { |
---|
606 | ISequence sequence = taskFactory.createNewSequence(); |
---|
607 | |
---|
608 | Console.traceln(Level.FINEST, "replacing " + sequence.getId() |
---|
609 | + ": " + task); |
---|
610 | |
---|
611 | List<ISequenceInstance> sequenceInstances = replaceTaskOccurrences( |
---|
612 | task, appData.getSessions(), sequence); |
---|
613 | |
---|
614 | harmonizeSequenceInstancesModel(sequence, sequenceInstances, |
---|
615 | task.size()); |
---|
616 | appData.detectedAndReplacedTasks(appData |
---|
617 | .detectedAndReplacedTasks() |
---|
618 | || (sequenceInstances.size() > 0)); |
---|
619 | |
---|
620 | if (sequenceInstances.size() < appData.getLastFoundTasks() |
---|
621 | .getOccurrenceCount()) { |
---|
622 | Console.traceln(Level.FINE, |
---|
623 | sequence.getId() |
---|
624 | + ": replaced task only " |
---|
625 | + sequenceInstances.size() |
---|
626 | + " times instead of expected " |
---|
627 | + appData.getLastFoundTasks() |
---|
628 | .getOccurrenceCount()); |
---|
629 | } |
---|
630 | } |
---|
631 | } |
---|
632 | |
---|
633 | } |
---|
634 | |
---|
635 | /** |
---|
636 | * |
---|
637 | */ |
---|
638 | private void harmonizeSequenceInstancesModel(ISequence sequence, |
---|
639 | List<ISequenceInstance> sequenceInstances, int sequenceLength) { |
---|
640 | TaskInstanceComparator comparator = preparationTaskHandlingStrategy |
---|
641 | .getTaskComparator(); |
---|
642 | |
---|
643 | // ensure for each subtask that lexically different variants are |
---|
644 | // preserved |
---|
645 | for (int subTaskIndex = 0; subTaskIndex < sequenceLength; subTaskIndex++) { |
---|
646 | List<ITask> subTaskVariants = new LinkedList<ITask>(); |
---|
647 | |
---|
648 | for (ISequenceInstance sequenceInstance : sequenceInstances) { |
---|
649 | ITask candidate = sequenceInstance.get(subTaskIndex).getTask(); |
---|
650 | |
---|
651 | boolean found = false; |
---|
652 | |
---|
653 | for (int i = 0; i < subTaskVariants.size(); i++) { |
---|
654 | if (comparator.areLexicallyEqual(subTaskVariants.get(i), |
---|
655 | candidate)) { |
---|
656 | taskBuilder.setTask(sequenceInstance.get(subTaskIndex), |
---|
657 | subTaskVariants.get(i)); |
---|
658 | |
---|
659 | found = true; |
---|
660 | break; |
---|
661 | } |
---|
662 | } |
---|
663 | |
---|
664 | if (!found) { |
---|
665 | subTaskVariants.add(candidate); |
---|
666 | } |
---|
667 | } |
---|
668 | |
---|
669 | // if there are more than one lexically different variant of the sub |
---|
670 | // task at |
---|
671 | // the considered position, adapt the sequence model at that |
---|
672 | // position to have |
---|
673 | // a selection of the different variants. In this case also adapt |
---|
674 | // the |
---|
675 | // generated sequence instances to correctly contain selection |
---|
676 | // instances. If |
---|
677 | // there is only one variant of sub tasks at the given position, |
---|
678 | // simply set |
---|
679 | // this variant as the sub task of the selection. In this case, the |
---|
680 | // instances |
---|
681 | // can be preserved as is |
---|
682 | if (subTaskVariants.size() > 1) { |
---|
683 | ISelection selection = taskFactory.createNewSelection(); |
---|
684 | |
---|
685 | for (ITask variant : subTaskVariants) { |
---|
686 | taskBuilder.addChild(selection, variant); |
---|
687 | } |
---|
688 | |
---|
689 | taskBuilder.addChild(sequence, selection); |
---|
690 | |
---|
691 | for (ISequenceInstance instance : sequenceInstances) { |
---|
692 | ISelectionInstance selectionInstance = taskFactory |
---|
693 | .createNewTaskInstance(selection); |
---|
694 | taskBuilder.setChild(selectionInstance, |
---|
695 | instance.get(subTaskIndex)); |
---|
696 | taskBuilder.setTaskInstance(instance, subTaskIndex, |
---|
697 | selectionInstance); |
---|
698 | } |
---|
699 | } else if (subTaskVariants.size() == 1) { |
---|
700 | taskBuilder.addChild(sequence, subTaskVariants.get(0)); |
---|
701 | } |
---|
702 | } |
---|
703 | } |
---|
704 | |
---|
705 | /** |
---|
706 | * @param tree |
---|
707 | */ |
---|
708 | private List<ISequenceInstance> replaceTaskOccurrences( |
---|
709 | List<ITaskInstance> task, List<IUserSession> sessions, |
---|
710 | ISequence temporalTaskModel) { |
---|
711 | List<ISequenceInstance> sequenceInstances = new LinkedList<ISequenceInstance>(); |
---|
712 | |
---|
713 | for (IUserSession session : sessions) { |
---|
714 | int index = -1; |
---|
715 | |
---|
716 | do { |
---|
717 | index = getSubListIndex(session, task, ++index); |
---|
718 | |
---|
719 | if (index > -1) { |
---|
720 | sequenceInstances.add(RuleUtils |
---|
721 | .createNewSubSequenceInRange(session, index, index |
---|
722 | + task.size() - 1, temporalTaskModel, |
---|
723 | taskFactory, taskBuilder)); |
---|
724 | } |
---|
725 | } while (index > -1); |
---|
726 | } |
---|
727 | |
---|
728 | return sequenceInstances; |
---|
729 | } |
---|
730 | |
---|
731 | /** |
---|
732 | * @param trie |
---|
733 | * @param object |
---|
734 | * @return |
---|
735 | */ |
---|
736 | private int getSubListIndex(ITaskInstanceList list, |
---|
737 | List<ITaskInstance> subList, int startIndex) { |
---|
738 | boolean matchFound; |
---|
739 | int result = -1; |
---|
740 | |
---|
741 | for (int i = startIndex; i <= list.size() - subList.size(); i++) { |
---|
742 | matchFound = true; |
---|
743 | |
---|
744 | for (int j = 0; j < subList.size(); j++) { |
---|
745 | // we prepared the task instances to refer to unique tasks, if |
---|
746 | // they are treated |
---|
747 | // as equal. Therefore, we just compare the identity of the |
---|
748 | // tasks of the task |
---|
749 | // instances |
---|
750 | if (list.get(i + j).getTask() != subList.get(j).getTask()) { |
---|
751 | matchFound = false; |
---|
752 | break; |
---|
753 | } |
---|
754 | } |
---|
755 | |
---|
756 | if (matchFound) { |
---|
757 | result = i; |
---|
758 | break; |
---|
759 | } |
---|
760 | } |
---|
761 | |
---|
762 | return result; |
---|
763 | } |
---|
764 | |
---|
765 | /** |
---|
766 | * @param trie |
---|
767 | * @param object |
---|
768 | * @return |
---|
769 | */ |
---|
770 | private int getSubListIndex(List<ITaskInstance> list, |
---|
771 | List<ITaskInstance> subList, int startIndex) { |
---|
772 | boolean matchFound; |
---|
773 | int result = -1; |
---|
774 | |
---|
775 | for (int i = startIndex; i <= list.size() - subList.size(); i++) { |
---|
776 | matchFound = true; |
---|
777 | |
---|
778 | for (int j = 0; j < subList.size(); j++) { |
---|
779 | // we prepared the task instances to refer to unique tasks, if |
---|
780 | // they are treated |
---|
781 | // as equal. Therefore, we just compare the identity of the |
---|
782 | // tasks of the task |
---|
783 | // instances |
---|
784 | if (list.get(i + j) != subList.get(j)) { |
---|
785 | matchFound = false; |
---|
786 | break; |
---|
787 | } |
---|
788 | } |
---|
789 | |
---|
790 | if (matchFound) { |
---|
791 | result = i; |
---|
792 | break; |
---|
793 | } |
---|
794 | } |
---|
795 | |
---|
796 | return result; |
---|
797 | } |
---|
798 | |
---|
799 | /** |
---|
800 | * @author Patrick Harms |
---|
801 | */ |
---|
802 | private class MaxCountAndLongestTasksFinder implements |
---|
803 | TrieProcessor<ITaskInstance> { |
---|
804 | |
---|
805 | /** |
---|
806 | * |
---|
807 | */ |
---|
808 | private int currentCount; |
---|
809 | |
---|
810 | /** |
---|
811 | * |
---|
812 | */ |
---|
813 | private List<List<ITaskInstance>> foundTasks = new LinkedList<List<ITaskInstance>>(); |
---|
814 | |
---|
815 | /** |
---|
816 | * |
---|
817 | */ |
---|
818 | public MaxCountAndLongestTasksFinder() { |
---|
819 | super(); |
---|
820 | this.currentCount = 0; |
---|
821 | } |
---|
822 | |
---|
823 | /* |
---|
824 | * (non-Javadoc) |
---|
825 | * |
---|
826 | * @see |
---|
827 | * de.ugoe.cs.autoquest.usageprofiles.TrieProcessor#process(java.util |
---|
828 | * .List, int) |
---|
829 | */ |
---|
830 | @Override |
---|
831 | public TrieProcessor.Result process(List<ITaskInstance> foundTask, |
---|
832 | int count) { |
---|
833 | if (foundTask.size() < 2) { |
---|
834 | // ignore single tasks |
---|
835 | return TrieProcessor.Result.CONTINUE; |
---|
836 | } |
---|
837 | |
---|
838 | if (count < 2) { |
---|
839 | // ignore singular occurrences |
---|
840 | return TrieProcessor.Result.SKIP_NODE; |
---|
841 | } |
---|
842 | |
---|
843 | if (this.currentCount > count) { |
---|
844 | // ignore this children of this task, as they may have only |
---|
845 | // smaller counts than |
---|
846 | // the already found tasks |
---|
847 | return TrieProcessor.Result.SKIP_NODE; |
---|
848 | } |
---|
849 | |
---|
850 | if (this.currentCount < count) { |
---|
851 | // the provided task occurs more often that all tasks found so |
---|
852 | // far. |
---|
853 | // clear all found tasks and use the new count as the one |
---|
854 | // searched for |
---|
855 | foundTasks.clear(); |
---|
856 | this.currentCount = count; |
---|
857 | } |
---|
858 | |
---|
859 | if (this.currentCount == count) { |
---|
860 | // the task is of interest. Sort it into the other found tasks |
---|
861 | // so that |
---|
862 | // the longest come first |
---|
863 | boolean added = false; |
---|
864 | for (int i = 0; i < foundTasks.size(); i++) { |
---|
865 | if (foundTasks.get(i).size() < foundTask.size()) { |
---|
866 | // defensive copy |
---|
867 | foundTasks.add(i, new LinkedList<ITaskInstance>( |
---|
868 | foundTask)); // defensive copy |
---|
869 | added = true; |
---|
870 | break; |
---|
871 | } |
---|
872 | } |
---|
873 | |
---|
874 | if (!added) { |
---|
875 | foundTasks.add(new LinkedList<ITaskInstance>(foundTask)); // defensive |
---|
876 | // copy |
---|
877 | } |
---|
878 | } |
---|
879 | |
---|
880 | return TrieProcessor.Result.CONTINUE; |
---|
881 | } |
---|
882 | |
---|
883 | /** |
---|
884 | * @return |
---|
885 | */ |
---|
886 | public Tasks getFoundTasks() { |
---|
887 | removePermutationsOfShorterTasks(); |
---|
888 | return new Tasks(currentCount, foundTasks); |
---|
889 | } |
---|
890 | |
---|
891 | /** |
---|
892 | * |
---|
893 | */ |
---|
894 | private void removePermutationsOfShorterTasks() { |
---|
895 | // now iterate the sorted list and for each task remove all other |
---|
896 | // tasks that are shorter |
---|
897 | // (i.e. come later in the sorted list) and that represent a subpart |
---|
898 | // of the task |
---|
899 | for (int i = 0; i < foundTasks.size(); i++) { |
---|
900 | for (int j = i + 1; j < foundTasks.size();) { |
---|
901 | if (foundTasks.get(j).size() < foundTasks.get(i).size()) { |
---|
902 | // found a task that is a potential subtask. Check for |
---|
903 | // this and remove the |
---|
904 | // subtask if needed |
---|
905 | List<ITaskInstance> longTask = foundTasks.get(i); |
---|
906 | List<ITaskInstance> shortTask = foundTasks.get(j); |
---|
907 | |
---|
908 | if (getSubListIndex(longTask, shortTask, 0) > -1) { |
---|
909 | foundTasks.remove(j); |
---|
910 | } else { |
---|
911 | j++; |
---|
912 | } |
---|
913 | } else { |
---|
914 | j++; |
---|
915 | } |
---|
916 | } |
---|
917 | } |
---|
918 | } |
---|
919 | |
---|
920 | } |
---|
921 | |
---|
922 | // /** |
---|
923 | // * @author Patrick Harms |
---|
924 | // */ |
---|
925 | // private class TrieStatisticsDumper implements |
---|
926 | // TrieProcessor<ITaskInstance> { |
---|
927 | // |
---|
928 | // /** |
---|
929 | // * |
---|
930 | // */ |
---|
931 | // private Map<Integer, Integer> counters = new HashMap<Integer, Integer>(); |
---|
932 | // |
---|
933 | // /* (non-Javadoc) |
---|
934 | // * @see |
---|
935 | // de.ugoe.cs.autoquest.usageprofiles.TrieProcessor#process(java.util.List, |
---|
936 | // int) |
---|
937 | // */ |
---|
938 | // @Override |
---|
939 | // public TrieProcessor.Result process(List<ITaskInstance> subsequence, int |
---|
940 | // count) { |
---|
941 | // if (subsequence.size() == 1) { |
---|
942 | // Integer value = counters.get(count); |
---|
943 | // |
---|
944 | // if (value == null) { |
---|
945 | // value = 0; |
---|
946 | // } |
---|
947 | // |
---|
948 | // counters.put(count, value + 1); |
---|
949 | // |
---|
950 | // return TrieProcessor.Result.CONTINUE; |
---|
951 | // } |
---|
952 | // else { |
---|
953 | // // ignore singular occurrences |
---|
954 | // return TrieProcessor.Result.SKIP_NODE; |
---|
955 | // } |
---|
956 | // } |
---|
957 | // |
---|
958 | // /** |
---|
959 | // * @return |
---|
960 | // */ |
---|
961 | // public void dumpCounters() { |
---|
962 | // int dumpedCounters = 0; |
---|
963 | // |
---|
964 | // int count = 1; |
---|
965 | // while (dumpedCounters < counters.size()) { |
---|
966 | // Integer value = counters.get(count++); |
---|
967 | // if (value != null) { |
---|
968 | // System.out.println(value + " symbols occurred " + count + " times"); |
---|
969 | // dumpedCounters++; |
---|
970 | // } |
---|
971 | // } |
---|
972 | // } |
---|
973 | // |
---|
974 | // } |
---|
975 | |
---|
976 | /** |
---|
977 | * |
---|
978 | */ |
---|
979 | private static class RuleApplicationData { |
---|
980 | |
---|
981 | /** |
---|
982 | * |
---|
983 | */ |
---|
984 | private List<IUserSession> sessions; |
---|
985 | |
---|
986 | /** |
---|
987 | * |
---|
988 | */ |
---|
989 | private TaskInstanceTrie lastTrie; |
---|
990 | |
---|
991 | /** |
---|
992 | * default and minimum trained sequence length is 3 |
---|
993 | */ |
---|
994 | private int trainedSequenceLength = 3; |
---|
995 | |
---|
996 | /** |
---|
997 | * |
---|
998 | */ |
---|
999 | private Tasks lastFoundTasks = new Tasks(Integer.MAX_VALUE, null); |
---|
1000 | |
---|
1001 | /** |
---|
1002 | * |
---|
1003 | */ |
---|
1004 | private boolean detectedAndReplacedTasks; |
---|
1005 | |
---|
1006 | /** |
---|
1007 | * |
---|
1008 | */ |
---|
1009 | private RuleApplicationResult result = new RuleApplicationResult(); |
---|
1010 | |
---|
1011 | /** |
---|
1012 | * |
---|
1013 | */ |
---|
1014 | private StopWatch stopWatch = new StopWatch(); |
---|
1015 | |
---|
1016 | /** |
---|
1017 | * |
---|
1018 | */ |
---|
1019 | private RuleApplicationData(List<IUserSession> sessions) { |
---|
1020 | this.sessions = sessions; |
---|
1021 | } |
---|
1022 | |
---|
1023 | /** |
---|
1024 | * @return the tree |
---|
1025 | */ |
---|
1026 | private List<IUserSession> getSessions() { |
---|
1027 | return sessions; |
---|
1028 | } |
---|
1029 | |
---|
1030 | /** |
---|
1031 | * @param lastTrie |
---|
1032 | * the lastTrie to set |
---|
1033 | */ |
---|
1034 | private void setLastTrie(TaskInstanceTrie lastTrie) { |
---|
1035 | this.lastTrie = lastTrie; |
---|
1036 | } |
---|
1037 | |
---|
1038 | /** |
---|
1039 | * @return the lastTrie |
---|
1040 | */ |
---|
1041 | private TaskInstanceTrie getLastTrie() { |
---|
1042 | return lastTrie; |
---|
1043 | } |
---|
1044 | |
---|
1045 | /** |
---|
1046 | * @param trainedSequenceLength |
---|
1047 | * the trainedSequenceLength to set |
---|
1048 | */ |
---|
1049 | private void setTrainedSequenceLength(int trainedSequenceLength) { |
---|
1050 | this.trainedSequenceLength = trainedSequenceLength; |
---|
1051 | } |
---|
1052 | |
---|
1053 | /** |
---|
1054 | * @return the trainedSequenceLength |
---|
1055 | */ |
---|
1056 | private int getTrainedSequenceLength() { |
---|
1057 | return trainedSequenceLength; |
---|
1058 | } |
---|
1059 | |
---|
1060 | /** |
---|
1061 | * @param lastFoundSequences |
---|
1062 | * the lastFoundSequences to set |
---|
1063 | */ |
---|
1064 | private void setLastFoundTasks(Tasks lastFoundSequences) { |
---|
1065 | this.lastFoundTasks = lastFoundSequences; |
---|
1066 | } |
---|
1067 | |
---|
1068 | /** |
---|
1069 | * @return the lastFoundSequences |
---|
1070 | */ |
---|
1071 | private Tasks getLastFoundTasks() { |
---|
1072 | return lastFoundTasks; |
---|
1073 | } |
---|
1074 | |
---|
1075 | /** |
---|
1076 | * |
---|
1077 | */ |
---|
1078 | private void detectedAndReplacedTasks(boolean detectedAndReplacedTasks) { |
---|
1079 | this.detectedAndReplacedTasks = detectedAndReplacedTasks; |
---|
1080 | } |
---|
1081 | |
---|
1082 | /** |
---|
1083 | * |
---|
1084 | */ |
---|
1085 | private boolean detectedAndReplacedTasks() { |
---|
1086 | return detectedAndReplacedTasks; |
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1087 | } |
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1088 | |
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1089 | /** |
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1090 | * @return the result |
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1091 | */ |
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1092 | private RuleApplicationResult getResult() { |
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1093 | return result; |
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1094 | } |
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1095 | |
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1096 | /** |
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1097 | * @return the stopWatch |
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1098 | */ |
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1099 | private StopWatch getStopWatch() { |
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1100 | return stopWatch; |
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1101 | } |
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1102 | |
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1103 | } |
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1104 | |
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1105 | /** |
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1106 | * @author Patrick Harms |
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1107 | */ |
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1108 | private static class Tasks implements Iterable<List<ITaskInstance>> { |
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1109 | |
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1110 | /** |
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1111 | * |
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1112 | */ |
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1113 | private int occurrenceCount; |
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1114 | |
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1115 | /** |
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1116 | * |
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1117 | */ |
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1118 | private List<List<ITaskInstance>> sequences; |
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1119 | |
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1120 | /** |
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1121 | * @param occurrenceCount |
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1122 | * @param sequences |
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1123 | */ |
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1124 | private Tasks(int occurrenceCount, List<List<ITaskInstance>> sequences) { |
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1125 | super(); |
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1126 | this.occurrenceCount = occurrenceCount; |
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1127 | this.sequences = sequences; |
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1128 | } |
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1129 | |
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1130 | /** |
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1131 | * @return |
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1132 | */ |
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1133 | private int getOccurrenceCount() { |
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1134 | return occurrenceCount; |
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1135 | } |
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1136 | |
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1137 | /** |
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1138 | * @return |
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1139 | */ |
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1140 | private int size() { |
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1141 | return this.sequences.size(); |
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1142 | } |
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1143 | |
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1144 | /** |
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1145 | * |
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1146 | */ |
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1147 | |
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1148 | /* |
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1149 | * (non-Javadoc) |
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1150 | * |
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1151 | * @see java.lang.Iterable#iterator() |
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1152 | */ |
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1153 | @Override |
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1154 | public Iterator<List<ITaskInstance>> iterator() { |
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1155 | return this.sequences.iterator(); |
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1156 | } |
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1157 | |
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1158 | /* |
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1159 | * (non-Javadoc) |
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1160 | * |
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1161 | * @see java.lang.Object#toString() |
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1162 | */ |
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1163 | @Override |
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1164 | public String toString() { |
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1165 | StringBuffer result = new StringBuffer(); |
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1166 | result.append(this.occurrenceCount); |
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1167 | result.append(" occurrences:\n"); |
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1168 | |
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1169 | for (List<ITaskInstance> task : sequences) { |
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1170 | result.append(task); |
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1171 | result.append("\n"); |
---|
1172 | } |
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1173 | |
---|
1174 | return result.toString(); |
---|
1175 | } |
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1176 | |
---|
1177 | } |
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1178 | |
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1179 | // methods for internal testing |
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1180 | // private void checkMatchingOfSessions(List<List<Event>> flattenedSessions, |
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1181 | // List<IUserSession> sessions, |
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1182 | // String when) |
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1183 | // { |
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1184 | // List<List<Event>> currentFlattenedSessions = flattenSessions(sessions); |
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1185 | // if (flattenedSessions.size() != currentFlattenedSessions.size()) { |
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1186 | // System.out.println("################## number of sessions changed after " |
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1187 | // + when); |
---|
1188 | // } |
---|
1189 | // else { |
---|
1190 | // for (int i = 0; i < flattenedSessions.size(); i++) { |
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1191 | // List<Event> expected = flattenedSessions.get(i); |
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1192 | // List<Event> current = currentFlattenedSessions.get(i); |
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1193 | // |
---|
1194 | // if (expected.size() != current.size()) { |
---|
1195 | // System.out.println |
---|
1196 | // ("################## length of session " + i + " changed after " + when); |
---|
1197 | // } |
---|
1198 | // else { |
---|
1199 | // for (int j = 0; j < expected.size(); j++) { |
---|
1200 | // if (!expected.get(j).equals(current.get(j))) { |
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1201 | // System.out.println("################## event " + j + " of session " + |
---|
1202 | // i + " changed after " + when); |
---|
1203 | // } |
---|
1204 | // } |
---|
1205 | // } |
---|
1206 | // } |
---|
1207 | // } |
---|
1208 | // } |
---|
1209 | // |
---|
1210 | // private List<List<Event>> flattenSessions(List<IUserSession> sessions) { |
---|
1211 | // List<List<Event>> flattenedSessions = new ArrayList<List<Event>>(); |
---|
1212 | // for (IUserSession session : sessions) { |
---|
1213 | // List<Event> flattenedUserSession = new ArrayList<Event>(); |
---|
1214 | // flatten(session, flattenedUserSession); |
---|
1215 | // flattenedSessions.add(flattenedUserSession); |
---|
1216 | // } |
---|
1217 | // |
---|
1218 | // return flattenedSessions; |
---|
1219 | // } |
---|
1220 | // |
---|
1221 | // private void flatten(IUserSession iUserSession, List<Event> |
---|
1222 | // flattenedUserSession) { |
---|
1223 | // for (ITaskInstance instance : iUserSession) { |
---|
1224 | // flatten(instance, flattenedUserSession); |
---|
1225 | // } |
---|
1226 | // } |
---|
1227 | // |
---|
1228 | // private void flatten(ITaskInstance instance, List<Event> |
---|
1229 | // flattenedUserSession) { |
---|
1230 | // if (instance instanceof ITaskInstanceList) { |
---|
1231 | // for (ITaskInstance child : (ITaskInstanceList) instance) { |
---|
1232 | // flatten(child, flattenedUserSession); |
---|
1233 | // } |
---|
1234 | // } |
---|
1235 | // else if (instance instanceof ISelectionInstance) { |
---|
1236 | // flatten(((ISelectionInstance) instance).getChild(), |
---|
1237 | // flattenedUserSession); |
---|
1238 | // } |
---|
1239 | // else if (instance instanceof IOptionalInstance) { |
---|
1240 | // flatten(((IOptionalInstance) instance).getChild(), flattenedUserSession); |
---|
1241 | // } |
---|
1242 | // else if (instance instanceof IEventTaskInstance) { |
---|
1243 | // flattenedUserSession.add(((IEventTaskInstance) instance).getEvent()); |
---|
1244 | // } |
---|
1245 | // } |
---|
1246 | |
---|
1247 | } |
---|