[1294] | 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.Collections; |
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| 18 | import java.util.Iterator; |
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| 19 | import java.util.LinkedList; |
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| 20 | import java.util.List; |
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| 21 | |
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[1414] | 22 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IIterationInstance; |
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[1294] | 23 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ISequence; |
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| 24 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ISequenceInstance; |
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| 25 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstance; |
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| 26 | |
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| 27 | /** |
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| 28 | * <p> |
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[1414] | 29 | * Default implementation of {@link IIterationInstance}. |
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[1294] | 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 | class SequenceInstance extends TaskInstance implements ISequenceInstance { |
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| 35 | |
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| 36 | /** |
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| 37 | * <p> |
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| 38 | * default serial version UID |
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| 39 | * </p> |
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| 40 | */ |
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| 41 | private static final long serialVersionUID = 1L; |
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| 42 | |
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| 43 | /** |
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| 44 | * <p> |
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| 45 | * the children of this task instance which are task instances, as well |
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| 46 | * </p> |
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| 47 | */ |
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| 48 | private List<ITaskInstance> children; |
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| 49 | |
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| 50 | /** |
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| 51 | * <p> |
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[1414] | 52 | * initializes this instance with the respective task model |
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[1294] | 53 | * </p> |
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| 54 | * |
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[1414] | 55 | * @param task the task of which this is an instance |
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[1294] | 56 | */ |
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| 57 | SequenceInstance(ISequence task) { |
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| 58 | super(task); |
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| 59 | } |
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| 60 | |
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| 61 | /* (non-Javadoc) |
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| 62 | * @see de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstance#getChildren() |
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| 63 | */ |
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| 64 | public synchronized List<ITaskInstance> getChildren() { |
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| 65 | if (children == null) { |
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| 66 | children = new LinkedList<ITaskInstance>(); |
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| 67 | } |
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| 68 | |
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| 69 | return Collections.unmodifiableList(children); |
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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.treeifc.ITaskInstanceList#get(int) |
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| 74 | */ |
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| 75 | @Override |
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| 76 | public ITaskInstance get(int index) { |
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| 77 | if (children == null) { |
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| 78 | throw new IndexOutOfBoundsException(Integer.toString(index)); |
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| 79 | } |
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| 80 | else { |
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| 81 | return children.get(index); |
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| 82 | } |
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| 83 | } |
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| 84 | |
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| 85 | /* (non-Javadoc) |
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| 86 | * @see de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstanceList#size() |
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| 87 | */ |
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| 88 | @Override |
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| 89 | public int size() { |
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| 90 | if (children == null) { |
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| 91 | return 0; |
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| 92 | } |
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| 93 | else { |
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| 94 | return children.size(); |
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| 95 | } |
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| 96 | } |
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| 97 | |
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| 98 | /* (non-Javadoc) |
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| 99 | * @see java.lang.Iterable#iterator() |
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| 100 | */ |
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| 101 | @Override |
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| 102 | public Iterator<ITaskInstance> iterator() { |
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| 103 | return getChildren().iterator(); |
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| 104 | } |
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| 105 | |
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| 106 | /* (non-Javadoc) |
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| 107 | * @see de.ugoe.cs.autoquest.tasktrees.treeifc.ISequenceInstance#getSequence() |
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| 108 | */ |
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| 109 | @Override |
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| 110 | public ISequence getSequence() { |
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| 111 | return (ISequence) super.getTask(); |
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| 112 | } |
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| 113 | |
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| 114 | /* (non-Javadoc) |
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| 115 | * @see de.ugoe.cs.autoquest.tasktrees.treeimpl.ISequenceInstance#clone() |
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| 116 | */ |
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| 117 | @Override |
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| 118 | public synchronized ISequenceInstance clone() { |
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| 119 | SequenceInstance clone = (SequenceInstance) super.clone(); |
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| 120 | |
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| 121 | if (children != null) { |
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| 122 | clone.children = new LinkedList<ITaskInstance>(); |
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| 123 | |
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| 124 | for (ITaskInstance child : children) { |
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| 125 | clone.children.add(child.clone()); |
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| 126 | } |
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| 127 | } |
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| 128 | |
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| 129 | return clone; |
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| 130 | } |
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| 131 | |
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| 132 | /** |
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| 133 | * <p> |
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| 134 | * used to add a child to this task instance |
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| 135 | * </p> |
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| 136 | * |
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| 137 | * @param child the new child of this instance |
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| 138 | */ |
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| 139 | synchronized void addChild(ITaskInstance child) { |
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| 140 | if (children == null) { |
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| 141 | children = new LinkedList<ITaskInstance>(); |
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| 142 | } |
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| 143 | |
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| 144 | children.add(child); |
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| 145 | } |
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| 146 | |
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| 147 | /** |
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| 148 | * <p> |
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| 149 | * used to add a child to this task instance at a specific position |
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| 150 | * </p> |
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| 151 | * |
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| 152 | * @param index the position of the new child in the list of children |
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| 153 | * @param child the new child of this instance |
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| 154 | */ |
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| 155 | synchronized void addChild(int index, ITaskInstance child) { |
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| 156 | if (children == null) { |
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| 157 | children = new LinkedList<ITaskInstance>(); |
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| 158 | } |
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| 159 | |
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| 160 | children.add(index, child); |
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| 161 | } |
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| 162 | |
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| 163 | /** |
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| 164 | * <p> |
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| 165 | * removes a child from this task instance at a specific position |
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| 166 | * </p> |
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| 167 | * |
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| 168 | * @param index the position of the child to be removed |
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| 169 | * |
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[1414] | 170 | * @return the child removed from the children of this instance |
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[1294] | 171 | */ |
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| 172 | synchronized ITaskInstance removeChild(int index) { |
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| 173 | if (children != null) { |
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| 174 | return children.remove(index); |
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| 175 | } |
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| 176 | else { |
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| 177 | throw new IllegalArgumentException |
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| 178 | ("this task instance does not have children that can be removed"); |
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| 179 | } |
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| 180 | } |
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| 181 | |
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| 182 | } |
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