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1
30 package com.genimen.djeneric.web.renderers.tree;
31
32 import java.util.ArrayList  ;
33 import java.util.HashMap ;
34 import java.util.StringTokenizer ;
35
36 import org.w3c.dom.DOMException ;
37 import org.w3c.dom.Document ;
38 import org.w3c.dom.Element ;
39
40 import com.genimen.djeneric.language.Messages;
41 import com.genimen.djeneric.repository.DjSession;
42 import com.genimen.djeneric.repository.exceptions.DjenericException;
43 import com.genimen.djeneric.structure.ExtentUsage;
44 import com.genimen.djeneric.util.DjStatusDisplayer;
45
46 public abstract class AbstractWebNode
47 {
48 public static final int MAX_NESTED_LEVEL = 25;
49 private static int _uidCounter = 1;
50
51 protected boolean _alreadyLoaded = false;
52 protected ExtentUsage _extentUsageBasedOn;
53 protected DjStatusDisplayer _statusDisplayer = null;
54 AbstractWebNode _parent = null;
55 ArrayList _children = new ArrayList ();
56 boolean _expanded = false;
57 private String _uid;
58 private String _path;
59 DjSession _session;
60
61 public AbstractWebNode(DjSession session)
62 {
63 _session = session;
64 _uid = String.valueOf(_uidCounter++);
65 if (_uidCounter > 999999999) _uidCounter = 1;
66 }
67
68 public abstract Element asXml(Document doc) throws DOMException , DjenericException;
69
70 public abstract void reload() throws DjenericException;
71
72 public abstract void delete() throws Exception ;
73
74 public abstract void setExpanded(boolean expand) throws DjenericException;
75
76 public void setExtentUsage(ExtentUsage usage)
77 {
78 _extentUsageBasedOn = usage;
79 }
80
81 public void setStatusMessage(String msg, boolean informative)
82 {
83 if (_statusDisplayer != null)
84 {
85 _statusDisplayer.setStatusMessage(msg, informative);
86 }
87 }
88
89 public ExtentUsage getExtentUsage()
90 {
91 return _extentUsageBasedOn;
92 }
93
94 public String toString()
95 {
96 if (_extentUsageBasedOn != null) return _extentUsageBasedOn.getTitle();
97 return "Model";
98 }
99
100 public AbstractWebNode getParent()
101 {
102 return _parent;
103 }
104
105 public void insertAsChild(AbstractWebNode node)
106 {
107 _children.add(node);
108 node.setParent(this);
109 }
110
111 public void setParent(AbstractWebNode node)
112 {
113 _parent = node;
114 _path = null;
116 }
117
118 public void reloadParent() throws Exception
119 {
120 AbstractWebNode p = getParent();
121 if (p != null) p.reload();
122 }
123
124 protected void expandAll(int level) throws DjenericException
125 {
126 if (level >= MAX_NESTED_LEVEL)
127 {
128 setStatusMessage(Messages.getString("DjenericTreeNode.MaximumNested", String.valueOf(MAX_NESTED_LEVEL)), true);
129 }
130 else
131 {
132
133 setExpanded(true);
134
135 for (int i = 0; i < getChildCount(); i++)
136 {
137 getChildAt(i).expandAll(level + 1);
138 }
139 }
140 }
141
142 public AbstractWebNode getChildAt(int i)
143 {
144 return (AbstractWebNode) _children.get(i);
145 }
146
147 public int getChildCount()
148 {
149 return _children.size();
150 }
151
152 public void collapseAll() throws DjenericException
153 {
154 setExpanded(false);
155
156 for (int i = 0; i < getChildCount(); i++)
157 {
158 getChildAt(i).collapseAll();
159 }
160 }
161
162 public boolean canDelete() throws DjenericException
163 {
164 return getExtentUsage() != null && getExtentUsage().isDeleteAllowed() && getSession().canDelete();
165 }
166
167 public boolean canCreate() throws DjenericException
168 {
169 if (getExtentUsage() == null) return false;
170
171 return getExtentUsage() != null && getExtentUsage().isInsertAllowed() && canEdit() && getSession().canCreate();
172 }
173
174 public boolean canFilter() throws DjenericException
175 {
176 return false;
177 }
178
179 public boolean canEdit() throws DjenericException
180 {
181 return getExtentUsage() != null && getExtentUsage().getEditor() != null && getSession().canModify();
182 }
183
184 public void filter() throws DjenericException
185 {
186 throw new DjenericException(Messages.getString("DjenericTreeNode.CanNotFilter"));
188 }
189
190 public AbstractWebNode getNode(String path)
191 {
192 StringTokenizer st = new StringTokenizer (path, "/");
193 return selectNode(st);
194 }
195
196 protected AbstractWebNode selectNode(StringTokenizer st)
197 {
198 if (!st.hasMoreElements())
199 {
200 return this;
201 }
202
203 while (st.hasMoreElements())
204 {
205 String currentNodeUid = st.nextToken();
206
207 for (int i = 0; i < getChildCount(); i++)
208 {
209 if (currentNodeUid.equals(getChildAt(i).getUid()))
210 {
211 return getChildAt(i).selectNode(st);
212 }
213 }
214 }
215 return null;
216 }
217
218 public boolean canCopy() throws DjenericException
219 {
220 return false;
221 }
222
223 public boolean canExport() throws DjenericException
224 {
225 return false;
226 }
227
228 protected void collectParameters(HashMap parentIds)
229 {
230 if (getParent() != null) getParent().collectParameters(parentIds);
231 }
232
233 public HashMap getParameters()
234 {
235 HashMap result = new HashMap ();
236 collectParameters(result);
237 return result;
238 }
239
240 public DjStatusDisplayer getStatusDisplayer()
241 {
242 return _statusDisplayer;
243 }
244
245 public void setStatusDisplayer(DjStatusDisplayer statusDisplayer)
246 {
247 _statusDisplayer = statusDisplayer;
248 }
249
250 public boolean isExpanded()
251 {
252 return _expanded;
253 }
254
255 public void expandPath() throws DjenericException
256 {
257 setExpanded(true);
258 if (getParent() != null) getParent().expandPath();
259 }
260
261 public void removeAllChildren()
262 {
263 _children.clear();
264
265 }
266
267 public void removeChild(AbstractWebNode node)
268 {
269 _children.remove(node);
270
271 }
272
273 protected String getUid()
274 {
275 return _uid;
276 }
277
278 public String getPath()
279 {
280 if (_path != null) return _path;
281 if (getParent() != null)
282 {
283 _path = getParent().getPath() + "/" + _uid;
284 }
285 else
286 {
287 _path = "";
289 }
290
291 return _path;
292 }
293
294 public boolean isExpandable()
295 {
296 return (_alreadyLoaded && getChildCount() > 0) || getExtentUsage().getDetailRelationCount() > 0 || !_alreadyLoaded;
297 }
298
299 public DjSession getSession()
300 {
301 return _session;
302 }
303
304 public void expandAll() throws DjenericException
305 {
306 expandAll(0);
307 }
308
309 } |
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