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30 package com.genimen.djeneric.repository;
31
32 import com.genimen.djeneric.language.Messages;
33 import com.genimen.djeneric.repository.exceptions.CatalogException;
34 import com.genimen.djeneric.repository.exceptions.DjenericException;
35 import com.genimen.djeneric.util.DjLogger;
36
37 public class DjRelation implements Cloneable 
38 {
39 public static final int ONE_TO_MANY = 0;
40 public static final int ONE_TO_ONE = 1;
41
42 String _name;
43 DjExtent _detailExtent;
44 DjExtent _masterExtent;
45 DjProperty _detailProperty;
46 DjRestriction _restriction = null;
47 boolean _isContainedRelation;
48 int _unicity = ONE_TO_MANY;
49 String _restrictionExpression = "";
50 String _description;
51 long _internalId;
52
53 public DjRelation(String name, DjExtent masterExtent, DjExtent detailExtent, DjProperty detailProperty,
54 boolean isContainedRelation, String description)
55 {
56 _internalId = DjPersistenceManager.getNextInternalId();
57 _name = name;
58 _masterExtent = masterExtent;
59 _detailExtent = detailExtent;
60 _detailProperty = detailProperty;
61 _isContainedRelation = isContainedRelation;
62 _description = description;
63 }
64
65 public String toString()
66 {
67 StringBuffer result = new StringBuffer (100);
68 if (_masterExtent != null) result.append(_masterExtent.toString());
69 else result.append("null");
70
71 result.append("-<");
72
73 if (_detailExtent != null) result.append(_detailExtent.toString());
74 else result.append("null");
75
76 result.append(".");
77
78 if (_detailProperty != null) result.append(_detailProperty.toString());
79 else result.append("null");
80
81 result.append(" ");
82
83 if (_name != null) result.append("(" + _name + ")");
84
85 return result.toString();
86 }
87
88 public boolean equals(Object other)
89 {
90 if (!(other instanceof DjRelation)) return false;
91 DjRelation rd = (DjRelation) other;
92
93 String detailPropertyName1 = "";
94 if (_detailProperty != null) detailPropertyName1 = _detailProperty.getName();
95
96 String detailPropertyName2 = "";
97 if (rd._detailProperty != null) detailPropertyName2 = rd._detailProperty.getName();
98
99 return _detailExtent == rd._detailExtent && _masterExtent == rd._masterExtent
100 && detailPropertyName1.equals(detailPropertyName2);
101 }
102
103 public int hashCode()
104 {
105 String detailPropertyName = "";
106 if (_detailProperty != null) detailPropertyName = _detailProperty.getName();
107
108 return detailPropertyName.hashCode();
109 }
110
111 public Object clone()
112 {
113 DjRelation nr = new DjRelation(getName(), getMasterExtent(), getDetailExtent(), getDetailProperty(),
114 isDetailsContained(), getDescription());
115 setInternalId(getInternalId());
116
117 try
118 {
119 copyPropertiesInto(nr);
120 }
121 catch (Exception x)
122 {
123 DjLogger.log(x);
124 throw new RuntimeException ("Internal error: DjRelation.clone() failed");
125 }
126 return nr;
127 }
128
129 protected void copyPropertiesInto(DjRelation nr)
130 {
131 nr.setName(getName());
132 nr.setDetailExtent(getDetailExtent());
133 nr.setMasterExtent(getMasterExtent());
134 nr.setDetailProperty(getDetailProperty());
135 nr.setDetailsContained(isDetailsContained());
136 nr.setRestrictionExpression(getRestrictionExpression());
137 nr.setDescription(getDescription());
138 nr.setUnicity(getUnicity());
139 nr._internalId = _internalId;
140 }
141
142 public DjRestriction getRestriction() throws CatalogException
143 {
144 if (_restriction == null)
145 {
146 if (_restrictionExpression.trim().length() > 0)
147 {
148 _restriction = new DjRestriction(this, _restrictionExpression);
149 }
150 }
151 return _restriction;
152 }
153
154 public void validateRestriction() throws CatalogException
155 {
156 setRestrictionExpression(getRestrictionExpression());
157 getRestriction();
158 }
159
160 public long getInternalId()
161 {
162 return _internalId;
163 }
164
165 protected void setInternalId(long internalId)
166 {
167 _internalId = internalId;
168 }
169
170 public String getName()
171 {
172 return _name;
173 }
174
175 public String getObjectNameSingular()
176 {
177 return _detailExtent.getNameSingular();
178 }
179
180 public String getObjectNamePlural()
181 {
182 return _detailExtent.getNamePlural();
183 }
184
185 public String getObjectType()
186 {
187 return _detailExtent.getName();
188 }
189
190 public String getDescription()
191 {
192 return _description;
193 }
194
195 public DjExtent getMasterExtent()
196 {
197 return _masterExtent;
198 }
199
200 public DjExtent getDetailExtent()
201 {
202 return _detailExtent;
203 }
204
205 public DjProperty getDetailProperty()
206 {
207 return _detailProperty;
208 }
209
210 public boolean isDetailsContained()
211 {
212 return _isContainedRelation;
213 }
214
215 public void setDescription(String description)
216 {
217 _description = description;
218 }
219
220 public void setDetailProperty(DjProperty detailProperty)
221 {
222 _detailProperty = detailProperty;
223 }
224
225 public void setDetailProperty(String detailPropertyName) throws DjenericException
226 {
227 _detailProperty = _detailExtent.getProperty(detailPropertyName);
228 }
229
230 public void setDetailsContained(boolean detailsContained)
231 {
232 _isContainedRelation = detailsContained;
233 }
234
235 public void setDetailExtent(DjExtent detailExtent)
236 {
237 _detailExtent = detailExtent;
238 try
239 {
240 if (_detailExtent.hasProperty(_detailProperty.getName()) && _detailProperty.getExtent() != _detailExtent)
241 {
242 _detailProperty = _detailExtent.getProperty(_detailProperty.getName());
245 }
246 }
247 catch (Exception x)
248 {
249 }
252 }
253
254 public void setMasterExtent(DjExtent masterExtent)
255 {
256 _masterExtent = masterExtent;
257 }
258
259 public void setName(String name)
260 {
261 _name = name;
262 }
263
264 public String getRestrictionExpression()
265 {
266 return _restrictionExpression;
267 }
268
269 public void setRestrictionExpression(String restrictionExpression)
270 {
271 if (_restriction != null) _restriction.unregister();
272 _restriction = null;
273 if (restrictionExpression == null) restrictionExpression = "";
274 _restrictionExpression = restrictionExpression.trim();
275 }
276
277 protected void validate(DjPersistenceManager mgr, boolean strictChecking) throws CatalogException
278 {
279 if (_masterExtent == null) throw new CatalogException(Messages.getString("DjRelation.MasterNotSet", getName()));
280 if (_detailExtent == null) throw new CatalogException(Messages.getString("DjRelation.DetailNotSet", _masterExtent
281 .getName()
282 + "."
283 + getName()));
284 if (_detailProperty == null) throw new CatalogException(Messages.getString("DjRelation.DetailPropNotSet",
285 _masterExtent.getName() + "."
286 + getName()));
287
288 if (getName().trim().length() == 0) throw new CatalogException(Messages.getString("DjRelation.RelnameNull",
289 _masterExtent.getName() + "."
290 + getName()));
291
292 if (strictChecking) if (!DjPersistenceManager.isValidName(getName()))
293 {
294 throw new CatalogException(Messages.getString("DjRelation.InvalidName", getDetailExtent().getName() + "."
295 + getName()));
296 }
297
298 if (!_masterExtent.getTypeName().equals(_detailExtent.getTypeName())) try
300 {
301 mgr.getType(_masterExtent.getTypeName());
302 }
303 catch (Exception x)
304 {
305 throw new CatalogException(Messages.getString("DjRelation.InvalidMaster", getName(), _masterExtent.getTypeName()));
306 }
307
308 try
309 {
310 DjProperty col = _detailExtent.getPropertyByInternalId(_detailProperty._internalId);
311 _detailProperty = col;
312 }
313 catch (Exception x)
314 {
315 _masterExtent.removeDetailRelation(this);
317 DjLogger.log(Messages.getString("DjRelation.DetailPropDeleted", _masterExtent.getName() + "." + getName()));
318 return;
319 }
320
321 try
323 {
324 if (strictChecking) validateRestriction();
325 }
326 catch (CatalogException x)
327 {
328 throw new CatalogException(Messages.getString("global.Restriction", _masterExtent.getName() + "." + getName(), x
329 .getMessage()));
330 }
331
332 DjRelation[] otherRels = mgr.getRelationsForProperty(_detailExtent.getName(), _detailProperty.getName());
333 if (otherRels.length > 1)
334 {
335 String rels = "";
337 for (int i = 0; i < otherRels.length; i++)
338 {
339 if (i != 0) rels += " " + Messages.getString("global.and") + " ";
340 rels += Messages.getString("DjRelation.Relation") + " " + otherRels[i].getMasterExtent().getName() + "."
341 + otherRels[i].getName();
342 }
343 throw new CatalogException(Messages.getString("DjRelation.MultiMapping", rels, _detailProperty.getName()));
344 }
345 if (!_detailExtent.hasProperty(_detailProperty.getName()))
346 {
347 throw new CatalogException(Messages.getString("DjRelation.InvalidDetailProp", getName(), _masterExtent.getName(),
348 _detailExtent.getName(), _detailProperty.getName(), _detailExtent
349 .getName()));
350 }
351 _detailProperty.setType(_masterExtent);
352
354 if (strictChecking)
355 {
356 try
358 {
359 getRestriction();
360 }
361 catch (CatalogException ce)
362 {
363 throw new CatalogException(Messages.getString("global.InvalidRestriction", _detailExtent.getName() + "."
364 + getName(), ce.getMessage()));
365 }
366 }
367 }
368
369 public int getUnicity()
370 {
371 return _unicity;
372 }
373
374 public void setUnicity(int unicity)
375 {
376 _unicity = unicity;
377 }
378
379 public boolean isOneToOne()
380 {
381 return _unicity == ONE_TO_ONE;
382 }
383
384 public boolean isOneToMany()
385 {
386 return _unicity == ONE_TO_MANY;
387 }
388 } |
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