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1
22 package org.jboss.xb.binding.sunday.unmarshalling;
23
24 import java.util.Collections  ;
25 import java.util.HashSet ;
26 import java.util.Set ;
27 import java.util.List ;
28 import java.util.ArrayList ;
29 import java.util.Collection ;
30 import javax.xml.namespace.QName ;
31 import org.jboss.xb.binding.JBossXBRuntimeException;
32 import org.xml.sax.Attributes ;
33
34
35
39 public class ChoiceBinding
40 extends ModelGroupBinding
41 {
42 private List choices = Collections.EMPTY_LIST;
43
44 public ChoiceBinding(SchemaBinding schema)
45 {
46 super(schema);
47 }
48
49 public ElementBinding getArrayItem()
50 {
51 return null;
52 }
53
54 public void addParticle(ParticleBinding particle)
55 {
56 switch(choices.size())
57 {
58 case 0:
59 choices = Collections.singletonList(particle);
60 break;
61 case 1:
62 choices = new ArrayList (choices);
63 default:
64 choices.add(particle);
65 }
66
67 super.addParticle(particle);
68 }
69
70 public Collection getParticles()
71 {
72 return Collections.unmodifiableCollection(choices);
73 }
74
75 public Cursor newCursor(ParticleBinding particle)
76 {
77 return new Cursor(particle)
78 {
79 private int pos = -1;
80 private ElementBinding element;
81 private int occurence;
82
83 public ParticleBinding getCurrentParticle()
84 {
85 if(pos < 0)
86 {
87 throw new JBossXBRuntimeException(
88 "The cursor has not been positioned yet! startElement should be called."
89 );
90 }
91 return (ParticleBinding)choices.get(pos);
92 }
93
94 public ElementBinding getElement()
95 {
96 if(pos < 0)
97 {
98 throw new JBossXBRuntimeException(
99 "The cursor has not been positioned yet! startElement should be called."
100 );
101 }
102 return element;
103 }
104
105 public boolean isPositioned()
106 {
107 return pos != -1;
108 }
109
110 public void endElement(QName qName)
111 {
112 if(element == null || !element.getQName().equals(qName))
113 {
114 throw new JBossXBRuntimeException("Failed to process endElement for " + qName +
115 " since the current element is " + (element == null ? "null" : element.getQName().toString())
116 );
117 }
118
119 if(trace)
120 {
121 log.trace("endElement " + qName + " in " + getModelGroup());
122 }
123 }
124
125 public int getOccurence()
126 {
127 return occurence;
128 }
129
130 protected List startElement(QName qName, Attributes atts, Set passedGroups, List groupStack, boolean required)
131 {
132 if(trace)
133 {
134 StringBuffer sb = new StringBuffer ();
135 sb.append("startElement " + qName + " in " + getModelGroup() + ", " + choices.size() + ": ");
136
137 for(int i = 0; i < choices.size(); ++i)
138 {
139 ParticleBinding particle = (ParticleBinding)choices.get(i);
140 Object o = particle.getTerm();
141 if(o instanceof ElementBinding)
142 {
143 sb.append(((ElementBinding)o).getQName());
144 }
145 else if(o instanceof SequenceBinding)
146 {
147 sb.append("sequence");
148 }
149 else if(o instanceof ChoiceBinding)
150 {
151 sb.append("choice");
152 }
153 else if(o instanceof AllBinding)
154 {
155 sb.append("all");
156 }
157
158 sb.append(" ");
159 }
160 sb.append("]");
161 log.trace(sb.toString());
162 }
163
164 int i = pos;
165 if(pos >= 0)
166 {
167 ParticleBinding particle = getCurrentParticle();
168 if(particle.getMaxOccursUnbounded() ||
169 occurence < particle.getMinOccurs() ||
170 occurence < particle.getMaxOccurs())
171 {
172 --i;
173 }
174 }
175
176 while(i < choices.size() - 1)
179 {
180 ParticleBinding particle = (ParticleBinding)choices.get(++i);
181 Object item = particle.getTerm();
182 if(item instanceof ElementBinding)
183 {
184 ElementBinding element = (ElementBinding)item;
185 if(qName.equals(element.getQName()))
186 {
187 if(pos == i)
188 {
189 ++occurence;
190 }
191 else
192 {
193 pos = i;
194 occurence = 1;
195 }
196 groupStack = addItem(groupStack, this);
197 this.element = element;
198
199 if(trace)
200 {
201 log.trace("found " + qName + " in " + getModelGroup());
202 }
203 break;
204 }
205 }
206 else if(item instanceof ModelGroupBinding)
207 {
208 ModelGroupBinding modelGroup = (ModelGroupBinding)item;
209 if(!passedGroups.contains(modelGroup))
210 {
211 switch(passedGroups.size())
212 {
213 case 0:
214 passedGroups = Collections.singleton(this);
215 break;
216 case 1:
217 passedGroups = new HashSet (passedGroups);
218 default:
219 passedGroups.add(this);
220 }
221
222 int groupStackSize = groupStack.size();
223 groupStack = modelGroup.newCursor(particle).startElement(
224 qName, atts, passedGroups, groupStack, particle.isRequired(occurence)
225 );
226
227 if(groupStackSize != groupStack.size())
228 {
229 if(pos != i)
230 {
231 pos = i;
232 occurence = 1;
233 }
234 else
235 {
236 ++occurence;
237 }
238 groupStack = addItem(groupStack, this);
239 element = null;
240 break;
241 }
242 }
243 }
244 else if(item instanceof WildcardBinding)
245 {
246 WildcardBinding wildcard = (WildcardBinding)item;
247 element = wildcard.getElement(qName, atts);
248 if(element != null)
249 {
250 if(pos != i)
251 {
252 pos = i;
253 occurence = 1;
254 }
255 else
256 {
257 ++occurence;
258 }
259 groupStack = addItem(groupStack, this);
260 break;
261 }
262 }
263 }
264
265 if(trace)
266 {
267 if(i == choices.size())
268 {
269 log.trace(qName + " not found in " + getModelGroup());
270 }
271 else
272 {
273 log.trace("leaving " + getModelGroup() + " i=" + i + ", pos=" + pos);
274 }
275 }
276
277 return groupStack;
278 }
279
280 protected ElementBinding getElement(QName qName, Attributes atts, Set passedGroups, boolean ignoreWildcards)
281 {
282 return getElement(choices, qName, atts, passedGroups, ignoreWildcards);
283 }
284 };
285 }
286
287 protected boolean mayStartWith(QName qName, Set set)
288 {
289 boolean result = false;
290 for(int i = 0; i < choices.size(); ++i)
291 {
292 ParticleBinding particle = (ParticleBinding)choices.get(i);
293 Object item = particle.getTerm();
294 if(item instanceof ElementBinding)
295 {
296 ElementBinding element = (ElementBinding)item;
297 if(qName.equals(element.getQName()))
298 {
299 result = true;
300 break;
301 }
302 }
303 else if(item instanceof ModelGroupBinding)
304 {
305 ModelGroupBinding modelGroup = (ModelGroupBinding)item;
306 if(!set.contains(modelGroup))
307 {
308 switch(set.size())
309 {
310 case 0:
311 set = Collections.singleton(this);
312 break;
313 case 1:
314 set = new HashSet (set);
315 default:
316 set.add(this);
317 }
318
319 result = modelGroup.mayStartWith(qName, set);
320
321 if(result)
322 {
323 break;
324 }
325 }
326 }
327 else
328 {
329 throw new JBossXBRuntimeException("Unexpected item type in model group: " + item);
330 }
331 }
332
333 return result;
334 }
335 }
336 |
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