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.treeimpl; |
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16 | |
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17 | import java.util.Arrays; |
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18 | import java.util.Collection; |
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19 | import java.util.Collections; |
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20 | import java.util.HashMap; |
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21 | import java.util.List; |
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22 | import java.util.Map; |
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23 | |
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24 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IEventTask; |
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25 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IEventTaskInstance; |
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26 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IIteration; |
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27 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IIterationInstance; |
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28 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IMarkingTemporalRelationship; |
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29 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IOptional; |
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30 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IOptionalInstance; |
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31 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ISelection; |
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32 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ISelectionInstance; |
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33 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IStructuringTemporalRelationship; |
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34 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITask; |
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35 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstance; |
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36 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstanceList; |
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37 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskModel; |
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38 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInfo; |
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39 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IUserSession; |
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40 | import de.ugoe.cs.autoquest.tasktrees.treeifc.TaskMetric; |
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41 | |
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42 | /** |
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43 | * <p> |
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44 | * this is the default implementation of the interface {@link ITaskModel}. It |
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45 | * does not do anything fancy except implementing the interface. It also |
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46 | * calculates on initialisations the measures for diverse metrics of the task |
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47 | * belonging to the model |
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48 | * </p> |
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49 | * |
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50 | * @author Patrick Harms |
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51 | */ |
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52 | class TaskModel implements ITaskModel { |
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53 | |
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54 | /** |
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55 | * <p> |
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56 | * the index of task infos used internally. The index is created once and |
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57 | * while that filled with task infos for each observed task containing all |
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58 | * measures for metrics belonging to the tasks. |
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59 | * </p> |
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60 | * |
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61 | * @author Patrick Harms |
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62 | */ |
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63 | private static class TaskModelIndex { |
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64 | |
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65 | /** |
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66 | * <p> |
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67 | * the tasks contained in the user session belonging to the model as |
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68 | * well as statistical infos about them |
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69 | * </p> |
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70 | */ |
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71 | private final Map<ITask, TaskInfo> taskMap = new HashMap<ITask, TaskInfo>(); |
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72 | |
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73 | /** |
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74 | * <p> |
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75 | * internal convenience method to build the task model during |
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76 | * initialization |
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77 | * </p> |
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78 | */ |
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79 | private void ensureTaskInfo(ITask task, ITask context) { |
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80 | ensureTaskInfo(task, context, 0, 0); |
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81 | |
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82 | if (task instanceof IStructuringTemporalRelationship) { |
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83 | for (final ITask child : ((IStructuringTemporalRelationship) task) |
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84 | .getChildren()) { |
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85 | ensureTaskInfo(child, task); |
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86 | } |
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87 | } else if (task instanceof IMarkingTemporalRelationship) { |
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88 | ensureTaskInfo( |
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89 | ((IMarkingTemporalRelationship) task).getMarkedTask(), |
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90 | task); |
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91 | } |
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92 | |
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93 | } |
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94 | |
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95 | /** |
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96 | * <p> |
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97 | * internal convenience method to build the task model during |
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98 | * initialization. Adds a new task info object to the map for the |
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99 | * provided task and fills it with measures. If there are already some |
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100 | * task infos for the task, the contained measures are updated according |
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101 | * to the parameters. |
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102 | * </p> |
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103 | */ |
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104 | private void ensureTaskInfo(ITask task, ITask context, |
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105 | int eventTaskInstancesCovered, int depth) { |
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106 | TaskInfo taskInfo = taskMap.get(task); |
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107 | |
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108 | if (taskInfo == null) { |
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109 | taskInfo = new TaskInfo(task); |
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110 | taskInfo.addMeasure(TaskMetric.COUNT); |
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111 | taskInfo.addMeasure(TaskMetric.EVENT_COVERAGE); |
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112 | taskInfo.addMeasure(TaskMetric.DEPTH); |
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113 | taskMap.put(task, taskInfo); |
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114 | |
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115 | taskInfo.setCount(TaskMetric.DEPTH, null, getDepth(task)); |
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116 | } |
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117 | |
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118 | taskInfo.increaseCount(TaskMetric.COUNT, context, 1); |
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119 | taskInfo.increaseCount(TaskMetric.EVENT_COVERAGE, context, |
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120 | eventTaskInstancesCovered); |
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121 | |
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122 | taskInfo.setCount(TaskMetric.DEPTH, context, depth); |
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123 | } |
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124 | |
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125 | /** |
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126 | * <p> |
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127 | * internal convenience method to calculate the maximum depth of a task |
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128 | * </p> |
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129 | */ |
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130 | private int getDepth(ITask task) { |
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131 | if (task instanceof IMarkingTemporalRelationship) { |
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132 | return getDepth(((IMarkingTemporalRelationship) task) |
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133 | .getMarkedTask()) + 1; |
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134 | } else if (task instanceof IStructuringTemporalRelationship) { |
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135 | int maxDepth = 0; |
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136 | |
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137 | for (final ITask child : ((IStructuringTemporalRelationship) task) |
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138 | .getChildren()) { |
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139 | maxDepth = Math.max(maxDepth, getDepth(child)); |
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140 | } |
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141 | |
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142 | return maxDepth + 1; |
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143 | } else { |
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144 | // event tasks |
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145 | return 1; |
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146 | } |
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147 | } |
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148 | |
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149 | /** |
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150 | * <p> |
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151 | * called on initialization to fill the index with infos about the given |
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152 | * task instance as well as to calculate the appropriate metrics |
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153 | * </p> |
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154 | */ |
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155 | private int[] handleTaskInstance(ITaskInstance taskInstance, |
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156 | ITask context) { |
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157 | int eventTaskInstancesCovered = 0; |
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158 | int depth = 0; |
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159 | |
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160 | if (taskInstance instanceof ITaskInstanceList) { |
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161 | for (final ITaskInstance child : (ITaskInstanceList) taskInstance) { |
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162 | final int[] measures = handleTaskInstance(child, |
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163 | taskInstance.getTask()); |
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164 | eventTaskInstancesCovered += measures[0]; |
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165 | depth = Math.max(depth, measures[1]); |
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166 | } |
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167 | |
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168 | if ((((ITaskInstanceList) taskInstance).size() == 0) |
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169 | && (taskInstance instanceof IIterationInstance)) { |
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170 | // ensure also empty task infos for unselected variants |
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171 | ensureTaskInfo( |
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172 | ((IIteration) taskInstance.getTask()) |
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173 | .getMarkedTask(), |
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174 | context); |
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175 | } |
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176 | } else if (taskInstance instanceof ISelectionInstance) { |
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177 | final ITaskInstance child = ((ISelectionInstance) taskInstance) |
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178 | .getChild(); |
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179 | final int[] measures = handleTaskInstance(child, |
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180 | taskInstance.getTask()); |
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181 | eventTaskInstancesCovered += measures[0]; |
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182 | depth = Math.max(depth, measures[1]); |
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183 | |
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184 | // ensure also empty task infos for unselected variants |
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185 | for (final ITask otherChildTask : ((ISelection) taskInstance |
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186 | .getTask()).getChildren()) { |
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187 | ensureTaskInfo(otherChildTask, context); |
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188 | } |
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189 | } else if (taskInstance instanceof IOptionalInstance) { |
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190 | final ITaskInstance child = ((IOptionalInstance) taskInstance) |
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191 | .getChild(); |
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192 | if (child != null) { |
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193 | final int[] measures = handleTaskInstance(child, |
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194 | taskInstance.getTask()); |
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195 | eventTaskInstancesCovered += measures[0]; |
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196 | depth = Math.max(depth, measures[1]); |
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197 | } else { |
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198 | // ensure also empty task infos for unselected variants |
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199 | ensureTaskInfo( |
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200 | ((IOptional) taskInstance.getTask()) |
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201 | .getMarkedTask(), |
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202 | context); |
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203 | } |
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204 | } else if (taskInstance instanceof IEventTaskInstance) { |
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205 | eventTaskInstancesCovered = 1; |
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206 | } |
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207 | |
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208 | depth++; |
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209 | |
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210 | ensureTaskInfo(taskInstance.getTask(), context, |
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211 | eventTaskInstancesCovered, depth); |
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212 | |
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213 | return new int[] { eventTaskInstancesCovered, depth }; |
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214 | } |
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215 | |
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216 | /** |
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217 | * |
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218 | */ |
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219 | /* |
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220 | * private void dumpToCSV(PrintStream out) { |
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221 | * out.println("taskid;depth;count;eventcoverage;eventcoverageratio"); |
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222 | * |
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223 | * for (Map.Entry<ITask, TaskInfo> entry : taskMap.entrySet()) { |
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224 | * out.print(entry.getKey().getId()); out.print(';'); |
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225 | * out.print(entry.getValue().getMeasureValue(TaskMetric.DEPTH)); |
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226 | * out.print(';'); |
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227 | * out.print(entry.getValue().getMeasureValue(TaskMetric.COUNT)); |
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228 | * out.print(';'); |
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229 | * out.print(entry.getValue().getMeasureValue(TaskMetric. |
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230 | * EVENT_COVERAGE)); out.print(';'); |
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231 | * out.print(entry.getValue().getMeasureValue |
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232 | * (TaskMetric.EVENT_COVERAGE_RATIO)); out.println(); } } |
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233 | */ |
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234 | |
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235 | } |
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236 | |
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237 | /** |
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238 | * <p> |
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239 | * default serial version UID |
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240 | * </p> |
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241 | */ |
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242 | private static final long serialVersionUID = 1L; |
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243 | |
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244 | /** |
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245 | * <p> |
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246 | * all metrics calculated by this type of task model |
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247 | * </p> |
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248 | */ |
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249 | private static final TaskMetric[] taskMetrics = new TaskMetric[] { |
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250 | TaskMetric.COUNT, TaskMetric.DEPTH, TaskMetric.EVENT_COVERAGE, |
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251 | TaskMetric.EVENT_COVERAGE_RATIO, TaskMetric.EVENT_COVERAGE_QUANTILE }; |
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252 | |
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253 | /** |
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254 | * <p> |
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255 | * the user sessions belonging to the model |
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256 | * </p> |
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257 | */ |
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258 | private final List<IUserSession> userSessions; |
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259 | |
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260 | /** |
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261 | * <p> |
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262 | * index for effectively accessing the model and calculating statistics |
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263 | * about it |
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264 | * </p> |
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265 | */ |
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266 | private transient TaskModelIndex index = null; |
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267 | |
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268 | /** |
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269 | * <p> |
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270 | * initializes the task model with the user sessions out of which the tasks |
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271 | * are extracted |
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272 | * </p> |
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273 | * |
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274 | * @param userSessions |
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275 | * as described |
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276 | */ |
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277 | TaskModel(List<IUserSession> userSessions) { |
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278 | if ((userSessions == null) || (userSessions.size() == 0)) { |
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279 | throw new IllegalArgumentException("user sessions must not be null"); |
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280 | } |
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281 | |
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282 | this.userSessions = userSessions; |
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283 | } |
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284 | |
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285 | /* |
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286 | * (non-Javadoc) |
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287 | * |
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288 | * @see java.lang.Object#clone() |
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289 | */ |
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290 | @Override |
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291 | public TaskModel clone() { |
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292 | return new TaskModel(userSessions); |
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293 | } |
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294 | |
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295 | /** |
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296 | * <p> |
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297 | * internal convenience method that initializes the internal index and |
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298 | * calculates all measures for metrics available for the tasks |
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299 | * </p> |
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300 | */ |
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301 | private synchronized void ensureInitialized() { |
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302 | if (index == null) { |
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303 | index = new TaskModelIndex(); |
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304 | |
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305 | for (final IUserSession session : this.userSessions) { |
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306 | for (final ITaskInstance taskInstance : session) { |
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307 | index.handleTaskInstance(taskInstance, null); |
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308 | } |
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309 | } |
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310 | |
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311 | // count all events covered |
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312 | int allEventsCovered = 0; |
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313 | final Collection<ITask> tasks = getTasks(); |
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314 | for (final ITask task : tasks) { |
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315 | if (task instanceof IEventTask) { |
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316 | allEventsCovered += task.getInstances().size(); |
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317 | } |
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318 | } |
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319 | |
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320 | final int[] eventCoverageRatios = new int[tasks.size()]; |
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321 | int i = 0; |
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322 | |
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323 | // add some further measures |
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324 | for (final ITask task : tasks) { |
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325 | final TaskInfo info = index.taskMap.get(task); |
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326 | info.addMeasure(TaskMetric.EVENT_COVERAGE_RATIO); |
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327 | |
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328 | final int coveredEvents = info |
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329 | .getMeasureValue(TaskMetric.EVENT_COVERAGE); |
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330 | int coverageRatio = 0; |
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331 | |
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332 | if (allEventsCovered > 0) { |
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333 | coverageRatio = (coveredEvents * 1000) / allEventsCovered; |
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334 | } |
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335 | |
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336 | eventCoverageRatios[i++] = coverageRatio; |
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337 | info.setCount(TaskMetric.EVENT_COVERAGE_RATIO, null, |
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338 | coverageRatio); |
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339 | } |
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340 | |
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341 | Arrays.sort(eventCoverageRatios); |
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342 | |
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343 | // add some further measures |
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344 | for (final ITask task : tasks) { |
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345 | final TaskInfo info = index.taskMap.get(task); |
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346 | info.addMeasure(TaskMetric.EVENT_COVERAGE_QUANTILE); |
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347 | int quantile = Arrays.binarySearch(eventCoverageRatios, |
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348 | info.getMeasureValue(TaskMetric.EVENT_COVERAGE_RATIO)); |
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349 | |
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350 | quantile = (1000 * quantile) / eventCoverageRatios.length; |
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351 | |
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352 | info.setCount(TaskMetric.EVENT_COVERAGE_QUANTILE, null, |
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353 | quantile); |
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354 | } |
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355 | |
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356 | // index.dumpToCSV(System.out); |
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357 | /* |
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358 | * try { OutputStream stream = new FileOutputStream(new |
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359 | * File("tasks.csv")); index.dumpToCSV(new PrintStream(stream)); |
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360 | * stream.close(); } catch (FileNotFoundException e) { |
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361 | * e.printStackTrace(); } |
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362 | */ |
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363 | } |
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364 | |
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365 | } |
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366 | |
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367 | /* |
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368 | * (non-Javadoc) |
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369 | * |
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370 | * @see de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskModel#getAllMetrics() |
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371 | */ |
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372 | @Override |
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373 | public TaskMetric[] getAllMetrics() { |
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374 | return taskMetrics; |
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375 | } |
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376 | |
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377 | /* |
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378 | * (non-Javadoc) |
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379 | * |
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380 | * @see de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskModel#getTaskInfo(ITask) |
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381 | */ |
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382 | @Override |
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383 | public ITaskInfo getTaskInfo(ITask task) { |
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384 | ensureInitialized(); |
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385 | return index.taskMap.get(task); |
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386 | } |
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387 | |
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388 | /* |
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389 | * (non-Javadoc) |
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390 | * |
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391 | * @see de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskModel#getTasks() |
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392 | */ |
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393 | @Override |
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394 | public Collection<ITask> getTasks() { |
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395 | ensureInitialized(); |
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396 | return Collections.unmodifiableCollection(index.taskMap.keySet()); |
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397 | } |
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398 | |
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399 | /* |
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400 | * (non-Javadoc) |
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401 | * |
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402 | * @see de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskModel#getUserSessions() |
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403 | */ |
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404 | @Override |
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405 | public List<IUserSession> getUserSessions() { |
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406 | ensureInitialized(); |
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407 | return Collections.unmodifiableList(userSessions); |
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408 | } |
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409 | |
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410 | } |
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