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.treeifc; |
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16 | |
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17 | /** |
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18 | * <p> |
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19 | * Default implementation for a task instance visitor performing a traversal of the instances |
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20 | * </p> |
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21 | * |
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22 | * @author Patrick Harms |
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23 | */ |
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24 | public class DefaultTaskInstanceTraversingVisitor implements ITaskInstanceVisitor { |
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25 | |
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26 | /* (non-Javadoc) |
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27 | * @see de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstanceVisitor#visit(IEventTaskInstance) |
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28 | */ |
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29 | @Override |
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30 | public void visit(IEventTaskInstance eventTaskInstance) { |
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31 | // do nothing |
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32 | } |
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33 | |
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34 | /* (non-Javadoc) |
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35 | * @see de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstanceVisitor#visit(IIterationInstance) |
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36 | */ |
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37 | @Override |
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38 | public void visit(IIterationInstance iterationInstance) { |
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39 | visit((ITaskInstanceList) iterationInstance); |
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40 | } |
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41 | |
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42 | /* (non-Javadoc) |
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43 | * @see de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstanceVisitor#visit(IOptionalInstance) |
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44 | */ |
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45 | @Override |
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46 | public void visit(IOptionalInstance optionalInstance) { |
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47 | if (optionalInstance.getChild() != null) { |
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48 | optionalInstance.getChild().accept(this); |
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49 | } |
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50 | } |
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51 | |
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52 | /* (non-Javadoc) |
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53 | * @see de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstanceVisitor#visit(ISelectionInstance) |
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54 | */ |
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55 | @Override |
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56 | public void visit(ISelectionInstance selectionInstance) { |
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57 | selectionInstance.getChild().accept(this); |
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58 | } |
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59 | |
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60 | /* (non-Javadoc) |
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61 | * @see de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstanceVisitor#visit(ISequenceInstance) |
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62 | */ |
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63 | @Override |
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64 | public void visit(ISequenceInstance sequenceInstance) { |
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65 | visit((ITaskInstanceList) sequenceInstance); |
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66 | } |
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67 | |
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68 | /* (non-Javadoc) |
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69 | * @see de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstanceVisitor#visit(ITaskInstance) |
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70 | */ |
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71 | @Override |
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72 | public void visit(ITaskInstance taskInstance) { |
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73 | if (taskInstance instanceof IEventTaskInstance) { |
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74 | visit((IEventTaskInstance) taskInstance); |
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75 | } |
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76 | else if (taskInstance instanceof IIterationInstance) { |
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77 | visit((IIterationInstance) taskInstance); |
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78 | } |
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79 | else if (taskInstance instanceof IOptionalInstance) { |
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80 | visit((IOptionalInstance) taskInstance); |
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81 | } |
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82 | else if (taskInstance instanceof ISelectionInstance) { |
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83 | visit((ISelectionInstance) taskInstance); |
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84 | } |
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85 | else if (taskInstance instanceof ISequenceInstance) { |
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86 | visit((ISequenceInstance) taskInstance); |
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87 | } |
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88 | } |
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89 | |
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90 | |
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91 | /** |
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92 | * <p> |
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93 | * common implementation for traversing task instance lists. |
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94 | * </p> |
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95 | * |
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96 | * @param taskInstanceList the task instance list to be traversed |
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97 | */ |
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98 | public void visit(ITaskInstanceList taskInstanceList) { |
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99 | for (ITaskInstance child : taskInstanceList) { |
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100 | child.accept(this); |
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101 | } |
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102 | } |
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103 | } |
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