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1 package org.columba.core.tagging;
2
3 import java.awt.Color  ;
4 import java.io.File ;
5 import java.util.Hashtable ;
6 import java.util.Iterator ;
7 import java.util.List ;
8 import java.util.UUID ;
9 import java.util.logging.Logger ;
10
11 import javax.swing.event.EventListenerList ;
12
13 import org.columba.api.exception.StoreException;
14 import org.columba.core.config.DefaultConfigDirectory;
15 import org.columba.core.config.XmlConfig;
16 import org.columba.core.tagging.api.ITag;
17 import org.columba.core.tagging.api.ITagEvent;
18 import org.columba.core.tagging.api.ITagListener;
19 import org.columba.core.tagging.api.ITagManager;
20 import org.jdom.Document;
21 import org.jdom.Element;
22
23
29 public class TagManager implements ITagManager {
30
31 private static final String TAGS = "tags";
32
33 private static final String TAG = "tag";
34
35 private static final String DESCRIPTION = "description";
36
37 private static final String COLOR = "color";
38
39 private static final String NAME = "name";
40
41 private static final String ID = "id";
42
43
44 private static final Logger LOG = Logger
45 .getLogger("org.columba.core.tagging.TagManager");
46
47 public static Hashtable <String , ITag> map = new Hashtable <String , ITag>();
48
49 protected EventListenerList listenerList = new EventListenerList ();
50
51 static private TagManager instance;
52
53 private Document document;
54
55 private MyXmlConfig xmlConfig;
56
57
60 protected TagManager() {
61
62 File file = DefaultConfigDirectory.getInstance().getCurrentPath();
63 File tagFile = new File (file, "tags.xml");
64
65 xmlConfig = new MyXmlConfig(tagFile);
69
70 document = xmlConfig.load();
71
72 loadModel(document);
74 }
75
76 public static TagManager getInstance() {
77 if (instance == null) {
78 synchronized (TagManager.class) {
79 if (instance == null)
80 instance = new TagManager();
81 }
82 }
83 return instance;
84 }
85
86
89 private void loadModel(Document document) {
90 Element tagsElement = null;
91 if (document.hasRootElement())
92 tagsElement = document.getRootElement();
93 else {
94 tagsElement = new Element("tags");
95 document.setRootElement(tagsElement);
96 }
97
98 List <Element> list = tagsElement.getChildren();
99 Iterator <Element> it = list.listIterator();
100 while (it.hasNext()) {
101 Element tagElement = it.next();
102 Tag tag = new Tag(tagElement.getAttributeValue(TagManager.ID),
103 tagElement.getAttributeValue(TagManager.NAME));
104 if (tagElement.getAttributeValue(TagManager.COLOR) != null) {
105 String colorString = tagElement
106 .getAttributeValue(TagManager.COLOR);
107 int rgb = Integer.parseInt(colorString);
108 tag.setColor(new Color (rgb));
109 }
110 if (tagElement.getAttributeValue(TagManager.DESCRIPTION) != null) {
111 String description = tagElement
112 .getAttributeValue(TagManager.DESCRIPTION);
113 tag.setDescription(description);
114 }
115
116 map.put(tag.getId(), tag);
117 }
118 }
119
120
123 private void saveModel(Document document) {
124 Element tagsElement = document.getRootElement();
125
126 if (tagsElement == null) {
128 tagsElement = new Element(TagManager.TAGS);
129 document.setRootElement(tagsElement);
130 }
131
132 tagsElement.removeContent();
134
135 Iterator <ITag> it = getAllTags();
136 while (it.hasNext()) {
137 ITag tag = it.next();
138 Element tagElement = new Element(TagManager.TAG);
139 tagElement.setAttribute(TagManager.ID, tag.getId());
140 tagElement.setAttribute(TagManager.NAME, tag.getName());
141 if (tag.getColor() != null) {
142 int rgb = tag.getColor().getRGB();
143 tagElement
144 .setAttribute(TagManager.COLOR, Integer.toString(rgb));
145 }
146
147 if ( tag.getDescription() != null) {
148 tagElement.setAttribute("description", tag.getDescription());
149 }
150
151 tagsElement.addContent(tagElement);
152 }
153 }
154
155
158 public ITag addTag(String name) throws StoreException {
159 if ((name == null) || (name.trim().length() == 0))
161 throw new IllegalArgumentException ("name == null");
162
163 String uuid = UUID.randomUUID().toString();
165 ITag tag = new Tag(uuid, name);
166
167 if (map.containsKey(uuid))
169 throw new IllegalArgumentException ("duplicate key " + uuid);
170
171 map.put(tag.getId(), tag);
172
173 fireTagAddedEvent(tag.getId());
175
176 return tag;
177 }
178
179
182 public Iterator <ITag> getAllTags() {
183 return map.values().iterator();
184 }
185
186
189 public ITag getTag(String id) {
190 return map.get(id);
191 }
192
193
196 public void removeTag(String id) throws StoreException {
197 map.remove(id);
198
199 fireTagDeletedEvent(id);
201 }
202
203
206 public void replaceTag(ITag tag) throws StoreException {
207 if (tag == null)
208 throw new IllegalArgumentException ("tag == null");
209
210 map.put(tag.getId(), tag);
212
213 fireTagChangedEvent(tag.getId());
215 }
216
217
218
219
222 public void addTagListener(ITagListener l) {
223 listenerList.add(ITagListener.class, l);
224
225 }
226
227
230 public void removeTagListener(ITagListener l) {
231 listenerList.remove(ITagListener.class, l);
232 }
233
234
237 protected void fireTagChangedEvent(String id) {
238 ITagEvent e = new TagEvent(this, id);
239 Object [] listeners = listenerList.getListenerList();
241
242 for (int i = listeners.length - 2; i >= 0; i -= 2) {
245 if (listeners[i] == ITagListener.class) {
246 ((ITagListener) listeners[i + 1]).tagChanged(e);
247 }
248 }
249 }
250
251
254 protected void fireTagAddedEvent(String id) {
255 ITagEvent e = new TagEvent(this, id);
256 Object [] listeners = listenerList.getListenerList();
258
259 for (int i = listeners.length - 2; i >= 0; i -= 2) {
262 if (listeners[i] == ITagListener.class) {
263 ((ITagListener) listeners[i + 1]).tagAdded(e);
264 }
265 }
266 }
267
268
271 protected void fireTagDeletedEvent(String id) {
272 ITagEvent e = new TagEvent(this, id);
273
274 Object [] listeners = listenerList.getListenerList();
276
277 for (int i = listeners.length - 2; i >= 0; i -= 2) {
280 if (listeners[i] == ITagListener.class) {
281 ((ITagListener) listeners[i + 1]).tagDeleted(e);
282 }
283 }
284 }
285
286 class MyXmlConfig extends XmlConfig {
287
288 public MyXmlConfig(File xmlFile) {
289 super(xmlFile, null);
290 }
291
292 @Override
293 protected void transformModelToDocument(Document document) {
294 saveModel(document);
295 }
296
297 }
298 }
299 |
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