[1146] | 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.ITask; |
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| 23 | import de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstance; |
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| 24 |
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| 25 | /**
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| 26 | * TODO comment
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| 27 | *
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| 28 | * @version $Revision: $ $Date: $
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| 29 | * @author 2011, last modified by $Author: $
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| 30 | */
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| 31 | class TaskInstance implements ITaskInstance { |
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| 32 |
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| 33 | /** */ |
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| 34 | private static final long serialVersionUID = 1L; |
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| 35 | |
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| 36 | /** */
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| 37 | private static int temporalId = 0;
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| 38 | |
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| 39 | /** */ |
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| 40 | private ITask task; |
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| 41 |
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| 42 | /** */
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| 43 | private int id;
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| 44 |
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| 45 | /** children */
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| 46 | private List<ITaskInstance> children;
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| 47 |
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| 48 | /**
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| 49 | *
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| 50 | */
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| 51 | TaskInstance(ITask task) {
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| 52 | this.task = task;
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| 53 | id = getNewId();
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| 54 | }
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| 55 |
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| 56 | /**
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| 57 | * TODO: comment
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| 58 | *
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| 59 | * @return
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| 60 | */
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| 61 | private static synchronized int getNewId() {
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| 62 | if (temporalId == Integer.MAX_VALUE) {
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| 63 | temporalId = 0;
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| 64 | }
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| 65 |
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| 66 | return temporalId++;
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| 67 | }
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| 68 |
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| 69 | /* (non-Javadoc) |
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| 70 | * @see de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstance#getTask() |
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| 71 | */ |
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| 72 | @Override
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| 73 | public ITask getTask() {
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| 74 | return task;
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| 75 | }
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| 76 |
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| 77 | /* (non-Javadoc) |
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| 78 | * @see de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstance#getChildren() |
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| 79 | */ |
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| 80 | public synchronized List<ITaskInstance> getChildren() {
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| 81 | if (children == null) {
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| 82 | children = new LinkedList<ITaskInstance>();
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| 83 | }
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| 84 |
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| 85 | return Collections.unmodifiableList(children);
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| 86 | }
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| 87 |
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| 88 | /* (non-Javadoc) |
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| 89 | * @see de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstanceList#get(int) |
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| 90 | */ |
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| 91 | @Override |
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| 92 | public ITaskInstance get(int index) { |
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| 93 | if (children == null) { |
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| 94 | throw new IndexOutOfBoundsException(Integer.toString(index)); |
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| 95 | } |
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| 96 | else { |
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| 97 | return children.get(index); |
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| 98 | } |
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| 99 | } |
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| 100 | |
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| 101 | /* (non-Javadoc) |
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| 102 | * @see de.ugoe.cs.autoquest.tasktrees.treeifc.ITaskInstanceList#size() |
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| 103 | */ |
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| 104 | @Override |
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| 105 | public int size() { |
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| 106 | if (children == null) { |
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| 107 | return 0; |
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| 108 | } |
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| 109 | else { |
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| 110 | return children.size(); |
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| 111 | } |
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| 112 | } |
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| 113 | |
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| 114 | /* (non-Javadoc) |
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| 115 | * @see java.lang.Iterable#iterator() |
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| 116 | */ |
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| 117 | @Override |
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| 118 | public Iterator<ITaskInstance> iterator() { |
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| 119 | return getChildren().iterator(); |
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| 120 | } |
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| 121 | |
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| 122 | /*
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| 123 | * (non-Javadoc)
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| 124 | *
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| 125 | * @see de.ugoe.cs.autoquest.tasktrees.treeifc.TaskTreeNode#equals(TaskTreeNode)
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| 126 | */
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| 127 | @Override
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| 128 | public boolean equals(ITaskInstance taskInstance) {
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| 129 | // task instances are only equal if they are identical or if they have the same id |
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| 130 | // (may happen, if they are cloned) |
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| 131 | return (this == taskInstance) || (this.hashCode() == taskInstance.hashCode()); |
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| 132 | }
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| 133 |
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| 134 | /*
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| 135 | * (non-Javadoc)
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| 136 | *
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| 137 | * @see java.lang.Object#hashCode()
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| 138 | */
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| 139 | @Override
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| 140 | public synchronized int hashCode() {
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| 141 | return id;
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| 142 | }
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| 143 |
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| 144 | /*
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| 145 | * (non-Javadoc)
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| 146 | *
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| 147 | * @see java.lang.Object#toString()
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| 148 | */
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| 149 | @Override
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| 150 | public synchronized String toString() { |
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| 151 | StringBuffer result = new StringBuffer(); |
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| 152 | result.append("task "); |
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| 153 | result.append(task.getId()); |
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| 154 | result.append(" (instance "); |
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| 155 | result.append(id); |
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| 156 | |
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| 157 | if (task.getDescription() != null) { |
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| 158 | result.append(", "); |
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| 159 | result.append(task.getDescription()); |
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| 160 | } |
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| 161 | |
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| 162 | if (children != null) { |
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| 163 | result.append(", "); |
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| 164 | result.append(children.size()); |
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| 165 | result.append(" children"); |
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| 166 | } |
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| 167 | |
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| 168 | result.append(')'); |
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| 169 | return result.toString();
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| 170 | }
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| 171 | |
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| 172 | /* |
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| 173 | * (non-Javadoc) |
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| 174 | * |
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| 175 | * @see java.lang.Object#clone() |
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| 176 | */ |
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| 177 | @Override |
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| 178 | public synchronized ITaskInstance clone() { |
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| 179 | TaskInstance clone = null; |
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| 180 | try { |
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| 181 | clone = (TaskInstance) super.clone(); |
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| 182 | |
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| 183 | if (children != null) { |
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| 184 | clone.children = new LinkedList<ITaskInstance>(); |
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| 185 | |
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| 186 | for (ITaskInstance child : children) { |
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| 187 | clone.children.add(child.clone()); |
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| 188 | } |
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| 189 | } |
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| 190 | |
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| 191 | } |
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| 192 | catch (CloneNotSupportedException e) { |
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| 193 | // this should never happen. Therefore simply dump the exception |
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| 194 | e.printStackTrace(); |
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| 195 | } |
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| 196 | |
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| 197 | return clone; |
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| 198 | } |
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| 199 |
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| 200 | /**
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| 201 | *
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| 202 | */
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| 203 | synchronized void addChild(ITaskInstance child) {
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| 204 | if (children == null) {
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| 205 | children = new LinkedList<ITaskInstance>();
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| 206 | }
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| 207 |
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| 208 | children.add(child);
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| 209 | }
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| 210 |
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| 211 | /**
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| 212 | *
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| 213 | */
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| 214 | synchronized void addChild(int index, ITaskInstance child) {
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| 215 | if (children == null) {
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| 216 | children = new LinkedList<ITaskInstance>();
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| 217 | }
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| 218 |
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| 219 | children.add(index, child);
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| 220 | }
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| 221 |
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| 222 | /**
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| 223 | * TODO: comment
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| 224 | *
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| 225 | * @param i
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| 226 | * @return
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| 227 | */
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| 228 | synchronized ITaskInstance removeChild(int index) {
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| 229 | if (children != null) { |
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| 230 | return children.remove(index); |
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| 231 | } |
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| 232 | else { |
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| 233 | throw new IllegalArgumentException |
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| 234 | ("this task instance does not have children that can be removed"); |
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| 235 | }
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| 236 | } |
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| 237 | |
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| 238 | /** |
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| 239 | * @param task the task to set |
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| 240 | */ |
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| 241 | void setTask(ITask task) { |
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| 242 | this.task = task; |
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| 243 | }
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| 244 |
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| 245 | }
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