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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22 | import de.ugoe.cs.autoquest.tasktrees.treeifc.IIterationInstance; |
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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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29 | * Default implementation of {@link IIterationInstance}. |
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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 | 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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52 | * initializes this instance with the respective task model |
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53 | * </p> |
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54 | * |
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55 | * @param task the task of which this is an instance |
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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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170 | * @return the child removed from the children of this instance |
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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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