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.List; |
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19 | import java.util.logging.Level; |
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20 | |
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21 | import de.ugoe.cs.autoquest.eventcore.guimodel.IDialog; |
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22 | import de.ugoe.cs.autoquest.eventcore.guimodel.IFrame; |
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23 | import de.ugoe.cs.autoquest.eventcore.guimodel.IGUIElement; |
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24 | import de.ugoe.cs.autoquest.tasktrees.taskequality.TaskEquality; |
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25 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskBuilder; |
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26 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskFactory; |
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27 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IUserSession; |
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28 | import de.ugoe.cs.util.console.Console; |
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29 | |
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30 | /** |
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31 | * TODO update comment |
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32 | * |
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33 | * <p> |
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34 | * This class is responsible for applying temporal relationship rules on a task tree. Through this, |
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35 | * a flat task tree is restructured to have more depth but to include more temporal relationships |
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36 | * between tasks which are not only a major sequence. I.e. through the application of the |
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37 | * rules iterations and selections of tasks are detected. Which kind of temporal relations |
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38 | * between tasks are detected depends on the {@link ITaskInstanceScopeRule}s known to |
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39 | * this class. |
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40 | * </p> |
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41 | * <p>The class holds references to the appropriate {@link ITaskInstanceScopeRule}s and calls |
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42 | * their {@link ITaskInstanceScopeRule#apply(de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstance)} |
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43 | * method for each task in the task tree it is needed for. The general behavior of this class is |
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44 | * the following: |
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45 | * </p> |
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46 | * <ol> |
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47 | * <li> |
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48 | * An instance of this class is created using the constructor and calling the |
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49 | * {@link #init()} method afterwards |
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50 | * </li> |
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51 | * <li> |
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52 | * then the {@link #applyTaskDetectionRule(List, TaskEquality, int)} |
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53 | * method is called for a so far unstructured task |
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54 | * </li> |
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55 | * <li> |
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56 | * the class iterates its internal list of rules and calls their |
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57 | * {@link ITaskInstanceScopeRule#apply(ITask, ITaskBuilder, ITaskFactory, boolean)} |
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58 | * method. |
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59 | * </li> |
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60 | * <li> |
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61 | * the class evaluates the rule application result |
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62 | * <ul> |
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63 | * <li> |
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64 | * if a rule returns a rule application result that is null, the next rule is tried |
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65 | * </li> |
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66 | * <li> |
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67 | * if a rule returns that it would be feasible if more data was available and the rule |
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68 | * application shall not be finalized (see finalize parameter of the applyRules method) |
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69 | * the rule application is broken up |
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70 | * </li> |
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71 | * <li> |
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72 | * if a rule returns, that it was applied, the same rule is applied again until it returns |
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73 | * null or feasible. For each newly created parent task provided in the rule application |
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74 | * result, the {@link #applyRules(ITask, ITaskBuilder, ITaskFactory, boolean)} |
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75 | * method is called. |
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76 | * </li> |
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77 | * </ul> |
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78 | * </li> |
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79 | * </ol> |
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80 | * <p> |
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81 | * Through this, all rules are tried to be applied at least once to the provided parent task and |
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82 | * all parent tasks created during the rule application. |
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83 | * </p> |
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84 | * |
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85 | * @author Patrick Harms |
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86 | */ |
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87 | public class TemporalRelationshipRuleManager { |
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88 | |
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89 | /** |
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90 | * <p> |
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91 | * the task factory to be used during rule application |
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92 | * </p> |
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93 | */ |
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94 | private ITaskFactory taskFactory; |
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95 | |
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96 | /** |
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97 | * <p> |
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98 | * the task builder to be used during rule application |
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99 | * </p> |
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100 | */ |
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101 | private ITaskBuilder taskBuilder; |
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102 | |
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103 | /** |
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104 | * <p> |
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105 | * initialize the manager |
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106 | * </p> |
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107 | * |
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108 | * @param taskFactory the task factory to be used for instantiating new task tree |
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109 | * tasks during rule application |
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110 | * @param taskBuilder the task builder to be used for linking tasks |
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111 | * with each other during rule application |
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112 | */ |
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113 | public TemporalRelationshipRuleManager(ITaskFactory taskFactory, ITaskBuilder taskBuilder) { |
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114 | super(); |
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115 | this.taskFactory = taskFactory; |
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116 | this.taskBuilder = taskBuilder; |
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117 | } |
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118 | |
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119 | /** |
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120 | * <p> |
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121 | * initialized the temporal relationship rule manager by instantiating the known rules and |
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122 | * providing them with a reference to the task equality manager or other information they need. |
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123 | * </p> |
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124 | */ |
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125 | public void init() { |
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126 | List<Class<? extends IGUIElement>> frameFilter = |
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127 | new ArrayList<Class<? extends IGUIElement>>(); |
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128 | frameFilter.add(IFrame.class); |
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129 | frameFilter.add(IDialog.class); |
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130 | //frameFilter.add(ICanvas.class); |
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131 | } |
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132 | |
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133 | /** |
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134 | * <p> |
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135 | * applies only the known rules for task detection, i.e., currently only the sequence for task |
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136 | * detection rule |
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137 | * </p> |
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138 | * |
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139 | * @param sessions the sessions to be processed |
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140 | */ |
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141 | public void applyTaskDetectionRule(List<IUserSession> sessions, |
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142 | TaskEquality minimalTaskEquality, |
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143 | int minimumSequenceCoverage) |
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144 | { |
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145 | ISessionScopeRule[] rules = new ISessionScopeRule[] { |
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146 | new SequenceForTaskDetectionRule(minimalTaskEquality, taskFactory, taskBuilder, |
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147 | minimumSequenceCoverage) |
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148 | }; |
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149 | |
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150 | applyRules(rules, sessions, ""); |
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151 | } |
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152 | |
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153 | /** |
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154 | * <p> |
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155 | * applies only the known rules for task merging, i.e., currently only the condense similar task |
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156 | * rule |
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157 | * </p> |
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158 | * |
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159 | * @param sessions the sessions to be processed |
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160 | */ |
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161 | public void applyTaskMergingRule(List<IUserSession> sessions) { |
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162 | ISessionScopeRule[] rules = new ISessionScopeRule[] { |
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163 | new CondenseSimilarTasksRule |
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164 | (TaskEquality.SEMANTICALLY_EQUAL, taskFactory, taskBuilder) |
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165 | }; |
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166 | |
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167 | applyRules(rules, sessions, ""); |
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168 | } |
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169 | |
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170 | /** |
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171 | * <p> |
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172 | * applies the known rules to the provided parent task. For the creation of further tasks, |
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173 | * the provided builder and task factory are utilized. If the finalize parameter is true, the |
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174 | * rule application is finalized as far as possible without waiting for further data. If it is |
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175 | * false, the rule application is broken up at the first rule returning, that its application |
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176 | * would be feasible. The method calls itself for each parent task created through the rule |
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177 | * application. In this case, the finalize parameter is always true. |
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178 | * </p> |
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179 | * |
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180 | * @param parent the parent task to apply the rules on |
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181 | * @param finalize used to indicate, if the rule application shall break up if a rule would |
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182 | * be feasible if further data was available, or not. |
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183 | * @param logIndent simply used for logging purposes to indent the log messages depending |
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184 | * on the recursion depth of calling this method. |
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185 | */ |
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186 | private int applyRules(ISessionScopeRule[] rules, |
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187 | List<IUserSession> sessions, |
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188 | String logIndent) |
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189 | { |
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190 | Console.traceln |
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191 | (Level.FINER, logIndent + "applying rules for " + sessions.size() + " sessions"); |
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192 | |
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193 | int noOfRuleApplications = 0; |
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194 | |
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195 | for (ISessionScopeRule rule : rules) { |
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196 | RuleApplicationResult result; |
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197 | do { |
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198 | Console.traceln(Level.FINER, logIndent + "trying rule " + rule); |
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199 | result = rule.apply(sessions); |
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200 | |
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201 | if ((result != null) && |
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202 | (result.getRuleApplicationStatus() == RuleApplicationStatus.FINISHED)) |
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203 | { |
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204 | Console.traceln(Level.FINE, logIndent + "applied rule " + rule); |
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205 | noOfRuleApplications++; |
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206 | |
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207 | //dumpTask(parent, ""); |
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208 | } |
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209 | } |
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210 | while ((result != null) && |
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211 | (result.getRuleApplicationStatus() == RuleApplicationStatus.FINISHED)); |
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212 | |
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213 | } |
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214 | |
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215 | if (noOfRuleApplications <= 0) { |
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216 | Console.traceln(Level.FINE, logIndent + "no rules applied --> no temporal " + |
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217 | "relationship generated"); |
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218 | } |
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219 | |
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220 | return noOfRuleApplications; |
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221 | } |
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222 | |
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223 | /** |
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224 | * |
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225 | */ |
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226 | /*private void dumpTask(ITask task, String indent) { |
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227 | StringBuffer message = new StringBuffer(); |
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228 | message.append(indent); |
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229 | message.append(task); |
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230 | if (task.getDescription() != null) { |
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231 | message.append('('); |
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232 | message.append(task.getDescription()); |
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233 | message.append(')'); |
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234 | } |
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235 | |
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236 | Console.traceln(Level.FINER, message.toString()); |
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237 | |
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238 | if ((task.getChildren() != null) && (task.getChildren().size() > 0)) { |
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239 | for (ITask child : task.getChildren()) { |
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240 | dumpTask(child, indent + " "); |
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241 | } |
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242 | } |
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243 | }*/ |
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244 | |
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245 | } |
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