ohair | 6c32066 | 2012-03-04 11:55:34 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Oracle designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Oracle in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| 22 | * or visit www.oracle.com if you need additional information or have any |
| 23 | * questions. |
| 24 | */ |
| 25 | |
| 26 | package com.sun.org.apache.xalan.internal.xsltc.trax; |
| 27 | |
| 28 | import java.io.IOException; |
| 29 | import java.util.Iterator; |
| 30 | |
| 31 | import org.xml.sax.Attributes; |
| 32 | import org.xml.sax.ContentHandler; |
| 33 | import org.xml.sax.DTDHandler; |
| 34 | import org.xml.sax.EntityResolver; |
| 35 | import org.xml.sax.ErrorHandler; |
| 36 | import org.xml.sax.InputSource; |
| 37 | import org.xml.sax.Locator; |
| 38 | import org.xml.sax.SAXException; |
| 39 | import org.xml.sax.SAXNotRecognizedException; |
| 40 | import org.xml.sax.SAXNotSupportedException; |
| 41 | import org.xml.sax.XMLReader; |
| 42 | import org.xml.sax.ext.LexicalHandler; |
| 43 | import org.xml.sax.helpers.AttributesImpl; |
| 44 | import org.xml.sax.ext.Locator2; |
| 45 | import com.sun.org.apache.xalan.internal.xsltc.dom.SAXImpl; |
| 46 | |
| 47 | import javax.xml.namespace.QName; |
| 48 | import javax.xml.stream.XMLEventReader; |
| 49 | import javax.xml.stream.XMLStreamConstants; |
| 50 | import javax.xml.stream.XMLStreamException; |
| 51 | import javax.xml.stream.events.Attribute; |
| 52 | import javax.xml.stream.events.Characters; |
| 53 | import javax.xml.stream.events.EndElement; |
| 54 | import javax.xml.stream.events.Namespace; |
| 55 | import javax.xml.stream.events.ProcessingInstruction; |
| 56 | import javax.xml.stream.events.StartElement; |
| 57 | import javax.xml.stream.events.XMLEvent; |
| 58 | import javax.xml.stream.events.StartDocument; |
| 59 | |
| 60 | |
| 61 | /** |
| 62 | * @author Suresh Kumar |
| 63 | * @author Sunitha Reddy |
| 64 | * @since 1.6 |
| 65 | */ |
| 66 | public class StAXEvent2SAX implements XMLReader, Locator { |
| 67 | |
| 68 | //private final static String EMPTYSTRING = ""; |
| 69 | //private static final String XMLNS_PREFIX = "xmlns"; |
| 70 | |
| 71 | // StAX event source |
| 72 | private final XMLEventReader staxEventReader; |
| 73 | |
| 74 | //private Node _dom = null; |
| 75 | private ContentHandler _sax = null; |
| 76 | private LexicalHandler _lex = null; |
| 77 | private SAXImpl _saxImpl = null; |
| 78 | //private Hashtable _nsPrefixes = new Hashtable(); |
| 79 | private String version = null; |
| 80 | private String encoding = null; |
| 81 | |
| 82 | |
| 83 | public StAXEvent2SAX(XMLEventReader staxCore) { |
| 84 | staxEventReader = staxCore; |
| 85 | } |
| 86 | |
| 87 | public ContentHandler getContentHandler() { |
| 88 | return _sax; |
| 89 | } |
| 90 | |
| 91 | public void setContentHandler(ContentHandler handler) throws |
| 92 | NullPointerException |
| 93 | { |
| 94 | _sax = handler; |
| 95 | if (handler instanceof LexicalHandler) { |
| 96 | _lex = (LexicalHandler) handler; |
| 97 | } |
| 98 | |
| 99 | if (handler instanceof SAXImpl) { |
| 100 | _saxImpl = (SAXImpl)handler; |
| 101 | } |
| 102 | } |
| 103 | |
| 104 | |
| 105 | public void parse(InputSource unused) throws IOException, SAXException { |
| 106 | try { |
| 107 | bridge(); |
| 108 | } catch (XMLStreamException e) { |
| 109 | throw new SAXException(e); |
| 110 | } |
| 111 | } |
| 112 | |
| 113 | |
| 114 | //Main Work Starts Here. |
| 115 | public void parse() throws IOException, SAXException, XMLStreamException { |
| 116 | bridge(); |
| 117 | } |
| 118 | |
| 119 | |
| 120 | /* public void parse() throws IOException, SAXException { |
| 121 | if (_dom != null) { |
| 122 | boolean isIncomplete = |
| 123 | (_dom.getNodeType() != org.w3c.dom.Node.DOCUMENT_NODE); |
| 124 | |
| 125 | if (isIncomplete) { |
| 126 | _sax.startDocument(); |
| 127 | parse(_dom); |
| 128 | _sax.endDocument(); |
| 129 | } |
| 130 | else { |
| 131 | parse(_dom); |
| 132 | } |
| 133 | } |
| 134 | } |
| 135 | */ |
| 136 | |
| 137 | /* |
| 138 | * @see StAXReaderToContentHandler#bridge() |
| 139 | */ |
| 140 | private void bridge() throws XMLStreamException { |
| 141 | |
| 142 | try { |
| 143 | // remembers the nest level of elements to know when we are done. |
| 144 | int depth=0; |
| 145 | boolean startedAtDocument = false; |
| 146 | |
| 147 | XMLEvent event = staxEventReader.peek(); |
| 148 | |
| 149 | if (!event.isStartDocument() && !event.isStartElement()) { |
| 150 | throw new IllegalStateException(); |
| 151 | } |
| 152 | |
| 153 | if (event.getEventType() == XMLStreamConstants.START_DOCUMENT){ |
| 154 | startedAtDocument = true; |
| 155 | version = ((StartDocument)event).getVersion(); |
| 156 | if (((StartDocument)event).encodingSet()) |
| 157 | encoding = ((StartDocument)event).getCharacterEncodingScheme(); |
| 158 | event=staxEventReader.nextEvent(); // that gets the one we peeked at |
| 159 | event=staxEventReader.nextEvent(); // that really gets the next one |
| 160 | } |
| 161 | |
| 162 | handleStartDocument(event); |
| 163 | |
| 164 | // Handle the prolog: http://www.w3.org/TR/REC-xml/#NT-prolog |
| 165 | while (event.getEventType() != XMLStreamConstants.START_ELEMENT) { |
| 166 | switch (event.getEventType()) { |
| 167 | case XMLStreamConstants.CHARACTERS : |
| 168 | handleCharacters(event.asCharacters()); |
| 169 | break; |
| 170 | case XMLStreamConstants.PROCESSING_INSTRUCTION : |
| 171 | handlePI((ProcessingInstruction)event); |
| 172 | break; |
| 173 | case XMLStreamConstants.COMMENT : |
| 174 | handleComment(); |
| 175 | break; |
| 176 | case XMLStreamConstants.DTD : |
| 177 | handleDTD(); |
| 178 | break; |
| 179 | case XMLStreamConstants.SPACE : |
| 180 | handleSpace(); |
| 181 | break; |
| 182 | default : |
| 183 | throw new InternalError("processing prolog event: " + event); |
| 184 | } |
| 185 | event=staxEventReader.nextEvent(); |
| 186 | } |
| 187 | |
| 188 | // Process the (document) element |
| 189 | do { |
| 190 | // These are all of the events listed in the javadoc for |
| 191 | // XMLEvent. |
| 192 | // The spec only really describes 11 of them. |
| 193 | switch (event.getEventType()) { |
| 194 | case XMLStreamConstants.START_ELEMENT : |
| 195 | depth++; |
| 196 | handleStartElement(event.asStartElement()); |
| 197 | break; |
| 198 | case XMLStreamConstants.END_ELEMENT : |
| 199 | handleEndElement(event.asEndElement()); |
| 200 | depth--; |
| 201 | break; |
| 202 | case XMLStreamConstants.CHARACTERS : |
| 203 | handleCharacters(event.asCharacters()); |
| 204 | break; |
| 205 | case XMLStreamConstants.ENTITY_REFERENCE : |
| 206 | handleEntityReference(); |
| 207 | break; |
| 208 | case XMLStreamConstants.PROCESSING_INSTRUCTION : |
| 209 | handlePI((ProcessingInstruction)event); |
| 210 | break; |
| 211 | case XMLStreamConstants.COMMENT : |
| 212 | handleComment(); |
| 213 | break; |
| 214 | case XMLStreamConstants.DTD : |
| 215 | handleDTD(); |
| 216 | break; |
| 217 | case XMLStreamConstants.ATTRIBUTE : |
| 218 | handleAttribute(); |
| 219 | break; |
| 220 | case XMLStreamConstants.NAMESPACE : |
| 221 | handleNamespace(); |
| 222 | break; |
| 223 | case XMLStreamConstants.CDATA : |
| 224 | handleCDATA(); |
| 225 | break; |
| 226 | case XMLStreamConstants.ENTITY_DECLARATION : |
| 227 | handleEntityDecl(); |
| 228 | break; |
| 229 | case XMLStreamConstants.NOTATION_DECLARATION : |
| 230 | handleNotationDecl(); |
| 231 | break; |
| 232 | case XMLStreamConstants.SPACE : |
| 233 | handleSpace(); |
| 234 | break; |
| 235 | default : |
| 236 | throw new InternalError("processing event: " + event); |
| 237 | } |
| 238 | |
| 239 | event=staxEventReader.nextEvent(); |
| 240 | } while (depth!=0); |
| 241 | |
| 242 | if (startedAtDocument) { |
| 243 | // Handle the Misc (http://www.w3.org/TR/REC-xml/#NT-Misc) that can follow the document element |
| 244 | while (event.getEventType() != XMLStreamConstants.END_DOCUMENT) { |
| 245 | switch (event.getEventType()) { |
| 246 | case XMLStreamConstants.CHARACTERS : |
| 247 | handleCharacters(event.asCharacters()); |
| 248 | break; |
| 249 | case XMLStreamConstants.PROCESSING_INSTRUCTION : |
| 250 | handlePI((ProcessingInstruction)event); |
| 251 | break; |
| 252 | case XMLStreamConstants.COMMENT : |
| 253 | handleComment(); |
| 254 | break; |
| 255 | case XMLStreamConstants.SPACE : |
| 256 | handleSpace(); |
| 257 | break; |
| 258 | default : |
| 259 | throw new InternalError("processing misc event after document element: " + event); |
| 260 | } |
| 261 | event=staxEventReader.nextEvent(); |
| 262 | } |
| 263 | } |
| 264 | |
| 265 | handleEndDocument(); |
| 266 | } catch (SAXException e) { |
| 267 | throw new XMLStreamException(e); |
| 268 | } |
| 269 | } |
| 270 | |
| 271 | |
| 272 | private void handleEndDocument() throws SAXException { |
| 273 | _sax.endDocument(); |
| 274 | } |
| 275 | |
| 276 | private void handleStartDocument(final XMLEvent event) throws SAXException { |
| 277 | _sax.setDocumentLocator(new Locator2() { |
| 278 | public int getColumnNumber() { |
| 279 | return event.getLocation().getColumnNumber(); |
| 280 | } |
| 281 | public int getLineNumber() { |
| 282 | return event.getLocation().getLineNumber(); |
| 283 | } |
| 284 | public String getPublicId() { |
| 285 | return event.getLocation().getPublicId(); |
| 286 | } |
| 287 | public String getSystemId() { |
| 288 | return event.getLocation().getSystemId(); |
| 289 | } |
| 290 | public String getXMLVersion(){ |
| 291 | return version; |
| 292 | } |
| 293 | public String getEncoding(){ |
| 294 | return encoding; |
| 295 | } |
| 296 | |
| 297 | }); |
| 298 | _sax.startDocument(); |
| 299 | } |
| 300 | |
| 301 | private void handlePI(ProcessingInstruction event) |
| 302 | throws XMLStreamException { |
| 303 | try { |
| 304 | _sax.processingInstruction( |
| 305 | event.getTarget(), |
| 306 | event.getData()); |
| 307 | } catch (SAXException e) { |
| 308 | throw new XMLStreamException(e); |
| 309 | } |
| 310 | } |
| 311 | |
| 312 | private void handleCharacters(Characters event) throws XMLStreamException { |
| 313 | try { |
| 314 | _sax.characters( |
| 315 | event.getData().toCharArray(), |
| 316 | 0, |
| 317 | event.getData().length()); |
| 318 | } catch (SAXException e) { |
| 319 | throw new XMLStreamException(e); |
| 320 | } |
| 321 | } |
| 322 | |
| 323 | private void handleEndElement(EndElement event) throws XMLStreamException { |
| 324 | QName qName = event.getName(); |
| 325 | |
| 326 | //construct prefix:localName from qName |
| 327 | String qname = ""; |
| 328 | if (qName.getPrefix() != null && qName.getPrefix().trim().length() != 0){ |
| 329 | qname = qName.getPrefix() + ":"; |
| 330 | } |
| 331 | qname += qName.getLocalPart(); |
| 332 | |
| 333 | try { |
| 334 | // fire endElement |
| 335 | _sax.endElement( |
| 336 | qName.getNamespaceURI(), |
| 337 | qName.getLocalPart(), |
| 338 | qname); |
| 339 | |
| 340 | // end namespace bindings |
| 341 | for( Iterator i = event.getNamespaces(); i.hasNext();) { |
| 342 | String prefix = (String)i.next(); |
| 343 | if( prefix == null ) { // true for default namespace |
| 344 | prefix = ""; |
| 345 | } |
| 346 | _sax.endPrefixMapping(prefix); |
| 347 | } |
| 348 | } catch (SAXException e) { |
| 349 | throw new XMLStreamException(e); |
| 350 | } |
| 351 | } |
| 352 | |
| 353 | private void handleStartElement(StartElement event) |
| 354 | throws XMLStreamException { |
| 355 | try { |
| 356 | // start namespace bindings |
| 357 | for (Iterator i = event.getNamespaces(); i.hasNext();) { |
| 358 | String prefix = ((Namespace)i.next()).getPrefix(); |
| 359 | if (prefix == null) { // true for default namespace |
| 360 | prefix = ""; |
| 361 | } |
| 362 | _sax.startPrefixMapping( |
| 363 | prefix, |
| 364 | event.getNamespaceURI(prefix)); |
| 365 | } |
| 366 | |
| 367 | // fire startElement |
| 368 | QName qName = event.getName(); |
| 369 | String prefix = qName.getPrefix(); |
| 370 | String rawname; |
| 371 | if (prefix == null || prefix.length() == 0) { |
| 372 | rawname = qName.getLocalPart(); |
| 373 | } else { |
| 374 | rawname = prefix + ':' + qName.getLocalPart(); |
| 375 | } |
| 376 | |
| 377 | Attributes saxAttrs = getAttributes(event); |
| 378 | _sax.startElement( |
| 379 | qName.getNamespaceURI(), |
| 380 | qName.getLocalPart(), |
| 381 | rawname, |
| 382 | saxAttrs); |
| 383 | } catch (SAXException e) { |
| 384 | throw new XMLStreamException(e); |
| 385 | } |
| 386 | } |
| 387 | |
| 388 | /** |
| 389 | * Get the attributes associated with the given START_ELEMENT StAXevent. |
| 390 | * |
| 391 | * @return the StAX attributes converted to an org.xml.sax.Attributes |
| 392 | */ |
| 393 | private Attributes getAttributes(StartElement event) { |
| 394 | AttributesImpl attrs = new AttributesImpl(); |
| 395 | |
| 396 | if ( !event.isStartElement() ) { |
| 397 | throw new InternalError( |
| 398 | "getAttributes() attempting to process: " + event); |
| 399 | } |
| 400 | |
| 401 | // in SAX, namespace declarations are not part of attributes by default. |
| 402 | // (there's a property to control that, but as far as we are concerned |
| 403 | // we don't use it.) So don't add xmlns:* to attributes. |
| 404 | |
| 405 | // gather non-namespace attrs |
| 406 | for (Iterator i = event.getAttributes(); i.hasNext();) { |
| 407 | Attribute staxAttr = (javax.xml.stream.events.Attribute)i.next(); |
| 408 | |
| 409 | String uri = staxAttr.getName().getNamespaceURI(); |
| 410 | if (uri == null) { |
| 411 | uri = ""; |
| 412 | } |
| 413 | String localName = staxAttr.getName().getLocalPart(); |
| 414 | String prefix = staxAttr.getName().getPrefix(); |
| 415 | String qName; |
| 416 | if (prefix == null || prefix.length() == 0) { |
| 417 | qName = localName; |
| 418 | } else { |
| 419 | qName = prefix + ':' + localName; |
| 420 | } |
| 421 | String type = staxAttr.getDTDType(); |
| 422 | String value = staxAttr.getValue(); |
| 423 | |
| 424 | attrs.addAttribute(uri, localName, qName, type, value); |
| 425 | } |
| 426 | |
| 427 | return attrs; |
| 428 | } |
| 429 | |
| 430 | private void handleNamespace() { |
| 431 | // no-op ??? |
| 432 | // namespace events don't normally occur outside of a startElement |
| 433 | // or endElement |
| 434 | } |
| 435 | |
| 436 | private void handleAttribute() { |
| 437 | // no-op ??? |
| 438 | // attribute events don't normally occur outside of a startElement |
| 439 | // or endElement |
| 440 | } |
| 441 | |
| 442 | private void handleDTD() { |
| 443 | // no-op ??? |
| 444 | // it seems like we need to pass this info along, but how? |
| 445 | } |
| 446 | |
| 447 | private void handleComment() { |
| 448 | // no-op ??? |
| 449 | } |
| 450 | |
| 451 | private void handleEntityReference() { |
| 452 | // no-op ??? |
| 453 | } |
| 454 | |
| 455 | private void handleSpace() { |
| 456 | // no-op ??? |
| 457 | // this event is listed in the javadoc, but not in the spec. |
| 458 | } |
| 459 | |
| 460 | private void handleNotationDecl() { |
| 461 | // no-op ??? |
| 462 | // this event is listed in the javadoc, but not in the spec. |
| 463 | } |
| 464 | |
| 465 | private void handleEntityDecl() { |
| 466 | // no-op ??? |
| 467 | // this event is listed in the javadoc, but not in the spec. |
| 468 | } |
| 469 | |
| 470 | private void handleCDATA() { |
| 471 | // no-op ??? |
| 472 | // this event is listed in the javadoc, but not in the spec. |
| 473 | } |
| 474 | |
| 475 | |
| 476 | /** |
| 477 | * This class is only used internally so this method should never |
| 478 | * be called. |
| 479 | */ |
| 480 | public DTDHandler getDTDHandler() { |
| 481 | return null; |
| 482 | } |
| 483 | |
| 484 | /** |
| 485 | * This class is only used internally so this method should never |
| 486 | * be called. |
| 487 | */ |
| 488 | public ErrorHandler getErrorHandler() { |
| 489 | return null; |
| 490 | } |
| 491 | |
| 492 | /** |
| 493 | * This class is only used internally so this method should never |
| 494 | * be called. |
| 495 | */ |
| 496 | public boolean getFeature(String name) throws SAXNotRecognizedException, |
| 497 | SAXNotSupportedException |
| 498 | { |
| 499 | return false; |
| 500 | } |
| 501 | |
| 502 | /** |
| 503 | * This class is only used internally so this method should never |
| 504 | * be called. |
| 505 | */ |
| 506 | public void setFeature(String name, boolean value) throws |
| 507 | SAXNotRecognizedException, SAXNotSupportedException |
| 508 | { |
| 509 | } |
| 510 | |
| 511 | /** |
| 512 | * This class is only used internally so this method should never |
| 513 | * be called. |
| 514 | */ |
| 515 | public void parse(String sysId) throws IOException, SAXException { |
| 516 | throw new IOException("This method is not yet implemented."); |
| 517 | } |
| 518 | |
| 519 | /** |
| 520 | * This class is only used internally so this method should never |
| 521 | * be called. |
| 522 | */ |
| 523 | public void setDTDHandler(DTDHandler handler) throws NullPointerException { |
| 524 | } |
| 525 | |
| 526 | /** |
| 527 | * This class is only used internally so this method should never |
| 528 | * be called. |
| 529 | */ |
| 530 | public void setEntityResolver(EntityResolver resolver) throws |
| 531 | NullPointerException |
| 532 | { |
| 533 | } |
| 534 | |
| 535 | /** |
| 536 | * This class is only used internally so this method should never |
| 537 | * be called. |
| 538 | */ |
| 539 | public EntityResolver getEntityResolver() { |
| 540 | return null; |
| 541 | } |
| 542 | |
| 543 | /** |
| 544 | * This class is only used internally so this method should never |
| 545 | * be called. |
| 546 | */ |
| 547 | public void setErrorHandler(ErrorHandler handler) throws |
| 548 | NullPointerException |
| 549 | { |
| 550 | } |
| 551 | |
| 552 | /** |
| 553 | * This class is only used internally so this method should never |
| 554 | * be called. |
| 555 | */ |
| 556 | public void setProperty(String name, Object value) throws |
| 557 | SAXNotRecognizedException, SAXNotSupportedException { |
| 558 | } |
| 559 | |
| 560 | /** |
| 561 | * This class is only used internally so this method should never |
| 562 | * be called. |
| 563 | */ |
| 564 | public Object getProperty(String name) throws SAXNotRecognizedException, |
| 565 | SAXNotSupportedException |
| 566 | { |
| 567 | return null; |
| 568 | } |
| 569 | |
| 570 | /** |
| 571 | * This class is only used internally so this method should never |
| 572 | * be called. |
| 573 | */ |
| 574 | public int getColumnNumber() { |
| 575 | return 0; |
| 576 | } |
| 577 | |
| 578 | /** |
| 579 | * This class is only used internally so this method should never |
| 580 | * be called. |
| 581 | */ |
| 582 | public int getLineNumber() { |
| 583 | return 0; |
| 584 | } |
| 585 | |
| 586 | /** |
| 587 | * This class is only used internally so this method should never |
| 588 | * be called. |
| 589 | */ |
| 590 | public String getPublicId() { |
| 591 | return null; |
| 592 | } |
| 593 | |
| 594 | /** |
| 595 | * This class is only used internally so this method should never |
| 596 | * be called. |
| 597 | */ |
| 598 | public String getSystemId() { |
| 599 | return null; |
| 600 | } |
| 601 | } |