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