146 private NGCCEventReceiver currentHandler;
147
148 public int replace( NGCCEventReceiver o, NGCCEventReceiver n ) {
149 if(o!=currentHandler)
150 throw new IllegalStateException(); // bug of RelaxNGCC
151 currentHandler = n;
152
153 return 0; // we only have one thread.
154 }
155
156 /**
157 * Processes buffered text.
158 *
159 * This method will be called by the start/endElement event to process
160 * buffered text as a text event.
161 *
162 * <p>
163 * Whitespace handling is a tricky business. Consider the following
164 * schema fragment:
165 *
166 * <xmp>
167 * <element name="foo">
168 * <choice>
169 * <element name="bar"><empty/></element>
170 * <text/>
171 * </choice>
172 * </element>
173 * </xmp>
174 *
175 * Assume we hit the following instance:
176 * <xmp>
177 * <foo> <bar/></foo>
178 * </xmp>
179 *
180 * Then this first space needs to be ignored (for otherwise, we will
181 * end up treating this space as the match to <text/> and won't
182 * be able to process <bar>.)
183 *
184 * Now assume the following instance:
185 * <xmp>
186 * <foo/>
187 * </xmp>
188 *
189 * This time, we need to treat this empty string as a text, for
190 * otherwise we won't be able to accept this instance.
191 *
192 * <p>
193 * This is very difficult to solve in general, but one seemingly
194 * easy solution is to use the type of next event. If a text is
195 * followed by a start tag, it follows from the constraint on
196 * RELAX NG that that text must be either whitespaces or a match
197 * to <text/>.
198 *
199 * <p>
200 * On the contrary, if a text is followed by a end tag, then it
201 * cannot be whitespace unless the content model can accept empty,
202 * in which case sending a text event will be harmlessly ignored
203 * by the NGCCHandler.
204 *
205 * <p>
206 * Thus this method take one parameter, which controls the
207 * behavior of this method.
464 );
465
466 redirect.startElement(uri,local,qname,currentAtts);
467 redirectionDepth=1;
468 }
469
470 //
471 //
472 // validation context implementation
473 //
474 //
475 /** in-scope namespace mapping.
476 * namespaces[2n ] := prefix
477 * namespaces[2n+1] := namespace URI */
478 private final ArrayList namespaces = new ArrayList();
479 /**
480 * Index on the namespaces array, which points to
481 * the top of the effective bindings. Because of the
482 * timing difference between the startPrefixMapping method
483 * and the execution of the corresponding actions,
484 * this value can be different from <code>namespaces.size()</code>.
485 * <p>
486 * For example, consider the following schema:
487 * <pre><xmp>
488 * <oneOrMore>
489 * <element name="foo"><empty/></element>
490 * </oneOrMore>
491 * code fragment X
492 * <element name="bob"/>
493 * </xmp></pre>
494 * Code fragment X is executed after we see a startElement event,
495 * but at this time the namespaces variable already include new
496 * namespace bindings declared on "bob".
497 */
498 private int nsEffectivePtr=0;
499
500 /**
501 * Stack to preserve old nsEffectivePtr values.
502 */
503 private final Stack nsEffectiveStack = new Stack();
504
505 public String resolveNamespacePrefix( String prefix ) {
506 for( int i = nsEffectivePtr-2; i>=0; i-=2 )
507 if( namespaces.get(i).equals(prefix) )
508 return (String)namespaces.get(i+1);
509
510 // no binding was found.
511 if(prefix.equals("")) return ""; // return the default no-namespace
512 if(prefix.equals("xml")) // pre-defined xml prefix
513 return "http://www.w3.org/XML/1998/namespace";
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146 private NGCCEventReceiver currentHandler;
147
148 public int replace( NGCCEventReceiver o, NGCCEventReceiver n ) {
149 if(o!=currentHandler)
150 throw new IllegalStateException(); // bug of RelaxNGCC
151 currentHandler = n;
152
153 return 0; // we only have one thread.
154 }
155
156 /**
157 * Processes buffered text.
158 *
159 * This method will be called by the start/endElement event to process
160 * buffered text as a text event.
161 *
162 * <p>
163 * Whitespace handling is a tricky business. Consider the following
164 * schema fragment:
165 *
166 * <pre>{@code
167 * <element name="foo">
168 * <choice>
169 * <element name="bar"><empty/></element>
170 * <text/>
171 * </choice>
172 * </element>
173 * }</pre>
174 *
175 * Assume we hit the following instance:
176 * <pre>{@code
177 * <foo> <bar/></foo>
178 * }</pre>
179 *
180 * Then this first space needs to be ignored (for otherwise, we will
181 * end up treating this space as the match to <text/> and won't
182 * be able to process <bar>.)
183 *
184 * Now assume the following instance:
185 * <pre>{@code
186 * <foo/>
187 * }</pre>
188 *
189 * This time, we need to treat this empty string as a text, for
190 * otherwise we won't be able to accept this instance.
191 *
192 * <p>
193 * This is very difficult to solve in general, but one seemingly
194 * easy solution is to use the type of next event. If a text is
195 * followed by a start tag, it follows from the constraint on
196 * RELAX NG that that text must be either whitespaces or a match
197 * to <text/>.
198 *
199 * <p>
200 * On the contrary, if a text is followed by a end tag, then it
201 * cannot be whitespace unless the content model can accept empty,
202 * in which case sending a text event will be harmlessly ignored
203 * by the NGCCHandler.
204 *
205 * <p>
206 * Thus this method take one parameter, which controls the
207 * behavior of this method.
464 );
465
466 redirect.startElement(uri,local,qname,currentAtts);
467 redirectionDepth=1;
468 }
469
470 //
471 //
472 // validation context implementation
473 //
474 //
475 /** in-scope namespace mapping.
476 * namespaces[2n ] := prefix
477 * namespaces[2n+1] := namespace URI */
478 private final ArrayList namespaces = new ArrayList();
479 /**
480 * Index on the namespaces array, which points to
481 * the top of the effective bindings. Because of the
482 * timing difference between the startPrefixMapping method
483 * and the execution of the corresponding actions,
484 * this value can be different from {@code namespaces.size()}.
485 * <p>
486 * For example, consider the following schema:
487 * <pre>{@code
488 * <oneOrMore>
489 * <element name="foo"><empty/></element>
490 * </oneOrMore>
491 * code fragment X
492 * <element name="bob"/>
493 * }</pre>
494 * Code fragment X is executed after we see a startElement event,
495 * but at this time the namespaces variable already include new
496 * namespace bindings declared on "bob".
497 */
498 private int nsEffectivePtr=0;
499
500 /**
501 * Stack to preserve old nsEffectivePtr values.
502 */
503 private final Stack nsEffectiveStack = new Stack();
504
505 public String resolveNamespacePrefix( String prefix ) {
506 for( int i = nsEffectivePtr-2; i>=0; i-=2 )
507 if( namespaces.get(i).equals(prefix) )
508 return (String)namespaces.get(i+1);
509
510 // no binding was found.
511 if(prefix.equals("")) return ""; // return the default no-namespace
512 if(prefix.equals("xml")) // pre-defined xml prefix
513 return "http://www.w3.org/XML/1998/namespace";
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