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 de.ugoe.cs.autoquest.tasktrees.treeifc.IOptional; |
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18 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IOptionalInstance; |
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19 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITask; |
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20 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstance; |
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21 | |
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22 | /** |
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23 | * <p> |
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24 | * Default implementation of {@link IOptionalInstance}. |
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25 | * </p> |
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26 | * |
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27 | * @author Patrick Harms |
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28 | */ |
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29 | class OptionalInstance extends TaskInstance implements IOptionalInstance { |
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30 | |
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31 | /** |
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32 | * <p> |
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33 | * default serial version UID |
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34 | * </p> |
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35 | */ |
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36 | private static final long serialVersionUID = 1L; |
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37 | |
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38 | /** |
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39 | * <p> |
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40 | * the child of this task instance if any |
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41 | * </p> |
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42 | */ |
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43 | private ITaskInstance child; |
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44 | |
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45 | /** |
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46 | * <p> |
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47 | * initializes this instance with the respective task model |
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48 | * </p> |
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49 | * |
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50 | * @param task the task of which this is an instance |
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51 | */ |
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52 | OptionalInstance(ITask task) { |
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53 | super(task); |
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54 | } |
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55 | |
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56 | /* (non-Javadoc) |
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57 | * @see de.ugoe.cs.autoquest.tasktrees.treeifc.IOptionalInstance#getChild() |
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58 | */ |
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59 | @Override |
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60 | public ITaskInstance getChild() { |
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61 | return child; |
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62 | } |
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63 | |
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64 | /* (non-Javadoc) |
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65 | * @see de.ugoe.cs.autoquest.tasktrees.treeifc.IOptionalInstance#getOptional() |
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66 | */ |
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67 | @Override |
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68 | public IOptional getOptional() { |
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69 | return (IOptional) super.getTask(); |
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70 | } |
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71 | |
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72 | /* (non-Javadoc) |
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73 | * @see de.ugoe.cs.autoquest.tasktrees.treeimpl.ISequenceInstance#clone() |
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74 | */ |
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75 | @Override |
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76 | public synchronized IOptionalInstance clone() { |
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77 | OptionalInstance clone = (OptionalInstance) super.clone(); |
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78 | |
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79 | if (child != null) { |
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80 | clone.child = child.clone(); |
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81 | } |
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82 | |
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83 | return clone; |
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84 | } |
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85 | |
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86 | /** |
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87 | * <p> |
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88 | * used to set the child of this task instance |
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89 | * </p> |
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90 | * |
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91 | * @param child the new child of this instance |
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92 | */ |
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93 | void setChild(ITaskInstance child) { |
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94 | if (child instanceof IOptionalInstance) { |
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95 | throw new IllegalArgumentException("the child of an optional can not be an optional"); |
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96 | } |
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97 | |
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98 | this.child = child; |
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99 | } |
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100 | |
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101 | } |
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