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 de.ugoe.cs.autoquest.tasktrees.taskequality.TaskEquality; |
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18 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstance; |
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19 | import de.ugoe.cs.autoquest.usageprofiles.SymbolComparator; |
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20 | import de.ugoe.cs.autoquest.usageprofiles.SymbolMap; |
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21 | import de.ugoe.cs.autoquest.usageprofiles.SymbolStrategy; |
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22 | |
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23 | /** |
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24 | * <p> |
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25 | * concrete implementation of a symbol strategy required in the creation of a |
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26 | * {@link de.ugoe.cs.autoquest.usageprofiles.Trie}. The strategy can be parameterized with a |
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27 | * considered task equality. It uses task instance comparators to perform task comparison. |
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28 | * It creates task specific symbol maps, which are {@link TaskSymbolIdentityMap} and |
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29 | * {@link TaskSymbolBucketedMap} depending on the level of considered task equality. |
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30 | * </p> |
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31 | * |
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32 | * @author Patrick Harms |
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33 | */ |
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34 | public class TaskHandlingStrategy implements SymbolStrategy<ITaskInstance> { |
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35 | |
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36 | /** */ |
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37 | private static final long serialVersionUID = 1L; |
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38 | |
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39 | /** |
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40 | * <p> |
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41 | * the level of task equality considered in this task handling strategy |
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42 | * </p> |
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43 | */ |
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44 | private TaskEquality consideredEquality; |
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45 | |
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46 | /** |
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47 | * <p> |
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48 | * the comparator used for task comparisons |
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49 | * </p> |
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50 | */ |
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51 | private TaskInstanceComparator comparator; |
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52 | |
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53 | /** |
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54 | * <p> |
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55 | * initializes this strategy with a task equality to be considered for task comparisons |
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56 | * g</p> |
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57 | * |
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58 | * @param consideredEquality the task equality to be considered for task comparisons |
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59 | */ |
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60 | public TaskHandlingStrategy(TaskEquality consideredEquality) { |
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61 | this.consideredEquality = consideredEquality; |
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62 | |
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63 | if (this.consideredEquality == TaskEquality.IDENTICAL) { |
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64 | comparator = new TaskIdentityComparator(); |
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65 | } |
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66 | else { |
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67 | comparator = new TaskInstanceComparator(this.consideredEquality); |
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68 | } |
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69 | } |
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70 | |
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71 | /* (non-Javadoc) |
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72 | * @see de.ugoe.cs.autoquest.usageprofiles.SymbolStrategy#getSymbolComparator() |
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73 | */ |
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74 | @Override |
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75 | public SymbolComparator<ITaskInstance> getSymbolComparator() { |
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76 | return comparator; |
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77 | } |
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78 | |
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79 | /** |
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80 | * <p> |
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81 | * convenience method to have a correctly typed return value as alternative to |
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82 | * {@link #getSymbolComparator()}; |
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83 | * </p> |
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84 | */ |
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85 | public TaskInstanceComparator getTaskComparator() { |
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86 | return comparator; |
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87 | } |
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88 | |
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89 | /* (non-Javadoc) |
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90 | * @see de.ugoe.cs.autoquest.usageprofiles.SymbolStrategy#createSymbolMap() |
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91 | */ |
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92 | @Override |
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93 | public <V> SymbolMap<ITaskInstance, V> createSymbolMap() { |
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94 | if (consideredEquality == TaskEquality.IDENTICAL) { |
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95 | return new TaskSymbolIdentityMap<V>(); |
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96 | } |
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97 | else { |
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98 | return new TaskSymbolBucketedMap<V>(comparator); |
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99 | } |
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100 | } |
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101 | |
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102 | /* (non-Javadoc) |
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103 | * @see de.ugoe.cs.autoquest.usageprofiles.SymbolStrategy#copySymbolMap(SymbolMap) |
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104 | */ |
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105 | @Override |
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106 | public <V> SymbolMap<ITaskInstance, V> copySymbolMap(SymbolMap<ITaskInstance, V> other) { |
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107 | if (consideredEquality == TaskEquality.IDENTICAL) { |
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108 | return new TaskSymbolIdentityMap<V>(other); |
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109 | } |
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110 | else { |
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111 | return new TaskSymbolBucketedMap<V>(comparator); |
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112 | } |
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113 | } |
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114 | |
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115 | } |
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