1/* 2 * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved. 3 */ 4/* 5 * Licensed to the Apache Software Foundation (ASF) under one or more 6 * contributor license agreements. See the NOTICE file distributed with 7 * this work for additional information regarding copyright ownership. 8 * The ASF licenses this file to You under the Apache License, Version 2.0 9 * (the "License"); you may not use this file except in compliance with 10 * the License. You may obtain a copy of the License at 11 * 12 * http://www.apache.org/licenses/LICENSE-2.0 13 * 14 * Unless required by applicable law or agreed to in writing, software 15 * distributed under the License is distributed on an "AS IS" BASIS, 16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 17 * See the License for the specific language governing permissions and 18 * limitations under the License. 19 */ 20 21package com.sun.org.apache.xalan.internal.xsltc.compiler; 22 23import com.sun.java_cup.internal.runtime.Symbol; 24import com.sun.org.apache.xalan.internal.XalanConstants; 25import com.sun.org.apache.xalan.internal.utils.FactoryImpl; 26import com.sun.org.apache.xalan.internal.utils.ObjectFactory; 27import com.sun.org.apache.xalan.internal.utils.SecuritySupport; 28import com.sun.org.apache.xalan.internal.utils.XMLSecurityManager; 29import com.sun.org.apache.xalan.internal.xsltc.compiler.util.ErrorMsg; 30import com.sun.org.apache.xalan.internal.xsltc.compiler.util.MethodType; 31import com.sun.org.apache.xalan.internal.xsltc.compiler.util.Type; 32import com.sun.org.apache.xalan.internal.xsltc.compiler.util.TypeCheckError; 33import com.sun.org.apache.xml.internal.serializer.utils.SystemIDResolver; 34import java.io.File; 35import java.io.IOException; 36import java.io.StringReader; 37import java.util.ArrayList; 38import java.util.HashMap; 39import java.util.Iterator; 40import java.util.List; 41import java.util.Map; 42import java.util.Properties; 43import java.util.Stack; 44import java.util.StringTokenizer; 45import javax.xml.XMLConstants; 46import javax.xml.catalog.CatalogFeatures; 47import javax.xml.parsers.ParserConfigurationException; 48import javax.xml.parsers.SAXParser; 49import javax.xml.parsers.SAXParserFactory; 50import jdk.xml.internal.JdkXmlFeatures; 51import jdk.xml.internal.JdkXmlUtils; 52import org.xml.sax.Attributes; 53import org.xml.sax.ContentHandler; 54import org.xml.sax.InputSource; 55import org.xml.sax.Locator; 56import org.xml.sax.SAXException; 57import org.xml.sax.SAXNotRecognizedException; 58import org.xml.sax.SAXNotSupportedException; 59import org.xml.sax.SAXParseException; 60import org.xml.sax.XMLReader; 61import org.xml.sax.helpers.AttributesImpl; 62 63/** 64 * @author Jacek Ambroziak 65 * @author Santiago Pericas-Geertsen 66 * @author G. Todd Miller 67 * @author Morten Jorgensen 68 * @author Erwin Bolwidt <ejb@klomp.org> 69 */ 70public class Parser implements Constants, ContentHandler { 71 72 private static final String XSL = "xsl"; // standard prefix 73 private static final String TRANSLET = "translet"; // extension prefix 74 75 private Locator _locator = null; 76 77 private XSLTC _xsltc; // Reference to the compiler object. 78 private XPathParser _xpathParser; // Reference to the XPath parser. 79 private ArrayList<ErrorMsg> _errors; // Contains all compilation errors 80 private ArrayList<ErrorMsg> _warnings; // Contains all compilation warnings 81 82 private Map<String, String> _instructionClasses; // Maps instructions to classes 83 private Map<String, String[]> _instructionAttrs; // reqd and opt attrs 84 private Map<String, QName> _qNames; 85 private Map<String, Map<String, QName>> _namespaces; 86 private QName _useAttributeSets; 87 private QName _excludeResultPrefixes; 88 private QName _extensionElementPrefixes; 89 private Map<String, Object> _variableScope; 90 private Stylesheet _currentStylesheet; 91 private SymbolTable _symbolTable; // Maps QNames to syntax-tree nodes 92 private Output _output; 93 private Template _template; // Reference to the template being parsed. 94 95 private boolean _rootNamespaceDef; // Used for validity check 96 97 private SyntaxTreeNode _root; 98 99 private String _target; 100 101 private int _currentImportPrecedence; 102 103 private boolean _useServicesMechanism = true; 104 105 public Parser(XSLTC xsltc, boolean useServicesMechanism) { 106 _xsltc = xsltc; 107 _useServicesMechanism = useServicesMechanism; 108 } 109 110 public void init() { 111 _qNames = new HashMap<>(512); 112 _namespaces = new HashMap<>(); 113 _instructionClasses = new HashMap<>(); 114 _instructionAttrs = new HashMap<>(); 115 _variableScope = new HashMap<>(); 116 _template = null; 117 _errors = new ArrayList<>(); 118 _warnings = new ArrayList<>(); 119 _symbolTable = new SymbolTable(); 120 _xpathParser = new XPathParser(this); 121 _currentStylesheet = null; 122 _output = null; 123 _root = null; 124 _rootNamespaceDef = false; 125 _currentImportPrecedence = 1; 126 127 initStdClasses(); 128 initInstructionAttrs(); 129 initExtClasses(); 130 initSymbolTable(); 131 132 _useAttributeSets = 133 getQName(XSLT_URI, XSL, "use-attribute-sets"); 134 _excludeResultPrefixes = 135 getQName(XSLT_URI, XSL, "exclude-result-prefixes"); 136 _extensionElementPrefixes = 137 getQName(XSLT_URI, XSL, "extension-element-prefixes"); 138 } 139 140 public void setOutput(Output output) { 141 if (_output != null) { 142 if (_output.getImportPrecedence() <= output.getImportPrecedence()) { 143 output.mergeOutput(_output); 144 _output.disable(); 145 _output = output; 146 } 147 else { 148 output.disable(); 149 } 150 } 151 else { 152 _output = output; 153 } 154 } 155 156 public Output getOutput() { 157 return _output; 158 } 159 160 public Properties getOutputProperties() { 161 return getTopLevelStylesheet().getOutputProperties(); 162 } 163 164 public void addVariable(Variable var) { 165 addVariableOrParam(var); 166 } 167 168 public void addParameter(Param param) { 169 addVariableOrParam(param); 170 } 171 172 private void addVariableOrParam(VariableBase var) { 173 Object existing = _variableScope.get(var.getName().getStringRep()); 174 if (existing != null) { 175 if (existing instanceof Stack) { 176 @SuppressWarnings("unchecked") 177 Stack<VariableBase> stack = (Stack<VariableBase>)existing; 178 stack.push(var); 179 } 180 else if (existing instanceof VariableBase) { 181 Stack<VariableBase> stack = new Stack<>(); 182 stack.push((VariableBase)existing); 183 stack.push(var); 184 _variableScope.put(var.getName().getStringRep(), stack); 185 } 186 } 187 else { 188 _variableScope.put(var.getName().getStringRep(), var); 189 } 190 } 191 192 public void removeVariable(QName name) { 193 Object existing = _variableScope.get(name.getStringRep()); 194 if (existing instanceof Stack) { 195 @SuppressWarnings("unchecked") 196 Stack<VariableBase> stack = (Stack<VariableBase>)existing; 197 if (!stack.isEmpty()) stack.pop(); 198 if (!stack.isEmpty()) return; 199 } 200 _variableScope.remove(name.getStringRep()); 201 } 202 203 public VariableBase lookupVariable(QName name) { 204 Object existing = _variableScope.get(name.getStringRep()); 205 if (existing instanceof VariableBase) { 206 return (VariableBase)existing; 207 } 208 else if (existing instanceof Stack) { 209 @SuppressWarnings("unchecked") 210 Stack<VariableBase> stack = (Stack<VariableBase>)existing; 211 return stack.peek(); 212 } 213 return null; 214 } 215 216 public void setXSLTC(XSLTC xsltc) { 217 _xsltc = xsltc; 218 } 219 220 public XSLTC getXSLTC() { 221 return _xsltc; 222 } 223 224 public int getCurrentImportPrecedence() { 225 return _currentImportPrecedence; 226 } 227 228 public int getNextImportPrecedence() { 229 return ++_currentImportPrecedence; 230 } 231 232 public void setCurrentStylesheet(Stylesheet stylesheet) { 233 _currentStylesheet = stylesheet; 234 } 235 236 public Stylesheet getCurrentStylesheet() { 237 return _currentStylesheet; 238 } 239 240 public Stylesheet getTopLevelStylesheet() { 241 return _xsltc.getStylesheet(); 242 } 243 244 public QName getQNameSafe(final String stringRep) { 245 // parse and retrieve namespace 246 final int colon = stringRep.lastIndexOf(':'); 247 if (colon != -1) { 248 final String prefix = stringRep.substring(0, colon); 249 final String localname = stringRep.substring(colon + 1); 250 String namespace = null; 251 252 // Get the namespace uri from the symbol table 253 if (prefix.equals(XMLNS_PREFIX) == false) { 254 namespace = _symbolTable.lookupNamespace(prefix); 255 if (namespace == null) namespace = EMPTYSTRING; 256 } 257 return getQName(namespace, prefix, localname); 258 } 259 else { 260 final String uri = stringRep.equals(XMLNS_PREFIX) ? null 261 : _symbolTable.lookupNamespace(EMPTYSTRING); 262 return getQName(uri, null, stringRep); 263 } 264 } 265 266 public QName getQName(final String stringRep) { 267 return getQName(stringRep, true, false); 268 } 269 270 public QName getQNameIgnoreDefaultNs(final String stringRep) { 271 return getQName(stringRep, true, true); 272 } 273 274 public QName getQName(final String stringRep, boolean reportError) { 275 return getQName(stringRep, reportError, false); 276 } 277 278 private QName getQName(final String stringRep, boolean reportError, 279 boolean ignoreDefaultNs) 280 { 281 // parse and retrieve namespace 282 final int colon = stringRep.lastIndexOf(':'); 283 if (colon != -1) { 284 final String prefix = stringRep.substring(0, colon); 285 final String localname = stringRep.substring(colon + 1); 286 String namespace = null; 287 288 // Get the namespace uri from the symbol table 289 if (prefix.equals(XMLNS_PREFIX) == false) { 290 namespace = _symbolTable.lookupNamespace(prefix); 291 if (namespace == null && reportError) { 292 final int line = getLineNumber(); 293 ErrorMsg err = new ErrorMsg(ErrorMsg.NAMESPACE_UNDEF_ERR, 294 line, prefix); 295 reportError(ERROR, err); 296 } 297 } 298 return getQName(namespace, prefix, localname); 299 } 300 else { 301 if (stringRep.equals(XMLNS_PREFIX)) { 302 ignoreDefaultNs = true; 303 } 304 final String defURI = ignoreDefaultNs ? null 305 : _symbolTable.lookupNamespace(EMPTYSTRING); 306 return getQName(defURI, null, stringRep); 307 } 308 } 309 310 public QName getQName(String namespace, String prefix, String localname) { 311 if (namespace == null || namespace.equals(EMPTYSTRING)) { 312 QName name = _qNames.get(localname); 313 if (name == null) { 314 name = new QName(null, prefix, localname); 315 _qNames.put(localname, name); 316 } 317 return name; 318 } 319 else { 320 Map<String, QName> space = _namespaces.get(namespace); 321 String lexicalQName = 322 (prefix == null || prefix.length() == 0) 323 ? localname 324 : (prefix + ':' + localname); 325 326 if (space == null) { 327 final QName name = new QName(namespace, prefix, localname); 328 _namespaces.put(namespace, space = new HashMap<>()); 329 space.put(lexicalQName, name); 330 return name; 331 } 332 else { 333 QName name = space.get(lexicalQName); 334 if (name == null) { 335 name = new QName(namespace, prefix, localname); 336 space.put(lexicalQName, name); 337 } 338 return name; 339 } 340 } 341 } 342 343 public QName getQName(String scope, String name) { 344 return getQName(scope + name); 345 } 346 347 public QName getQName(QName scope, QName name) { 348 return getQName(scope.toString() + name.toString()); 349 } 350 351 public QName getUseAttributeSets() { 352 return _useAttributeSets; 353 } 354 355 public QName getExtensionElementPrefixes() { 356 return _extensionElementPrefixes; 357 } 358 359 public QName getExcludeResultPrefixes() { 360 return _excludeResultPrefixes; 361 } 362 363 /** 364 * Create an instance of the <code>Stylesheet</code> class, 365 * and then parse, typecheck and compile the instance. 366 * Must be called after <code>parse()</code>. 367 */ 368 public Stylesheet makeStylesheet(SyntaxTreeNode element) 369 throws CompilerException { 370 try { 371 Stylesheet stylesheet; 372 373 if (element instanceof Stylesheet) { 374 stylesheet = (Stylesheet)element; 375 } 376 else { 377 stylesheet = new Stylesheet(); 378 stylesheet.setSimplified(); 379 stylesheet.addElement(element); 380 stylesheet.setAttributes((AttributesImpl) element.getAttributes()); 381 382 // Map the default NS if not already defined 383 if (element.lookupNamespace(EMPTYSTRING) == null) { 384 element.addPrefixMapping(EMPTYSTRING, EMPTYSTRING); 385 } 386 } 387 stylesheet.setParser(this); 388 return stylesheet; 389 } 390 catch (ClassCastException e) { 391 ErrorMsg err = new ErrorMsg(ErrorMsg.NOT_STYLESHEET_ERR, element); 392 throw new CompilerException(err.toString()); 393 } 394 } 395 396 /** 397 * Instanciates a SAX2 parser and generate the AST from the input. 398 */ 399 public void createAST(Stylesheet stylesheet) { 400 try { 401 if (stylesheet != null) { 402 stylesheet.parseContents(this); 403 final Iterator<SyntaxTreeNode> elements = stylesheet.elements(); 404 while (elements.hasNext()) { 405 SyntaxTreeNode child = elements.next(); 406 if (child instanceof Text) { 407 final int l = getLineNumber(); 408 ErrorMsg err = 409 new ErrorMsg(ErrorMsg.ILLEGAL_TEXT_NODE_ERR,l,null); 410 reportError(ERROR, err); 411 } 412 } 413 if (!errorsFound()) { 414 stylesheet.typeCheck(_symbolTable); 415 } 416 } 417 } 418 catch (TypeCheckError e) { 419 reportError(ERROR, new ErrorMsg(ErrorMsg.JAXP_COMPILE_ERR, e)); 420 } 421 } 422 423 /** 424 * Parses a stylesheet and builds the internal abstract syntax tree 425 * @param reader A SAX2 SAXReader (parser) 426 * @param input A SAX2 InputSource can be passed to a SAX reader 427 * @return The root of the abstract syntax tree 428 */ 429 public SyntaxTreeNode parse(XMLReader reader, InputSource input) { 430 try { 431 // Parse the input document and build the abstract syntax tree 432 reader.setContentHandler(this); 433 reader.parse(input); 434 // Find the start of the stylesheet within the tree 435 return (SyntaxTreeNode)getStylesheet(_root); 436 } 437 catch (IOException e) { 438 if (_xsltc.debug()) e.printStackTrace(); 439 reportError(ERROR,new ErrorMsg(ErrorMsg.JAXP_COMPILE_ERR, e)); 440 } 441 catch (SAXException e) { 442 Throwable ex = e.getException(); 443 if (_xsltc.debug()) { 444 e.printStackTrace(); 445 if (ex != null) ex.printStackTrace(); 446 } 447 reportError(ERROR, new ErrorMsg(ErrorMsg.JAXP_COMPILE_ERR, e)); 448 } 449 catch (CompilerException e) { 450 if (_xsltc.debug()) e.printStackTrace(); 451 reportError(ERROR, new ErrorMsg(ErrorMsg.JAXP_COMPILE_ERR, e)); 452 } 453 catch (Exception e) { 454 if (_xsltc.debug()) e.printStackTrace(); 455 reportError(ERROR, new ErrorMsg(ErrorMsg.JAXP_COMPILE_ERR, e)); 456 } 457 return null; 458 } 459 460 /** 461 * Parses a stylesheet and builds the internal abstract syntax tree 462 * @param input A SAX2 InputSource can be passed to a SAX reader 463 * @return The root of the abstract syntax tree 464 */ 465 public SyntaxTreeNode parse(InputSource input) { 466 try { 467 // Create a SAX parser and get the XMLReader object it uses 468 final SAXParserFactory factory = FactoryImpl.getSAXFactory(_useServicesMechanism); 469 470 if (_xsltc.isSecureProcessing()) { 471 try { 472 factory.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true); 473 } 474 catch (SAXException e) {} 475 } 476 477 try { 478 factory.setFeature(Constants.NAMESPACE_FEATURE,true); 479 } 480 catch (ParserConfigurationException | SAXNotRecognizedException | SAXNotSupportedException e) { 481 factory.setNamespaceAware(true); 482 } 483 484 final SAXParser parser = factory.newSAXParser(); 485 try { 486 parser.setProperty(XMLConstants.ACCESS_EXTERNAL_DTD, 487 _xsltc.getProperty(XMLConstants.ACCESS_EXTERNAL_DTD)); 488 } catch (SAXNotRecognizedException e) { 489 ErrorMsg err = new ErrorMsg(ErrorMsg.WARNING_MSG, 490 parser.getClass().getName() + ": " + e.getMessage()); 491 reportError(WARNING, err); 492 } 493 494 boolean supportCatalog = true; 495 boolean useCatalog = _xsltc.getFeature(JdkXmlFeatures.XmlFeature.USE_CATALOG); 496 try { 497 factory.setFeature(JdkXmlUtils.USE_CATALOG,useCatalog); 498 } 499 catch (ParserConfigurationException | SAXNotRecognizedException | SAXNotSupportedException e) { 500 supportCatalog = false; 501 } 502 503 if (supportCatalog && useCatalog) { 504 try { 505 CatalogFeatures cf = (CatalogFeatures)_xsltc.getProperty(JdkXmlFeatures.CATALOG_FEATURES); 506 if (cf != null) { 507 for (CatalogFeatures.Feature f : CatalogFeatures.Feature.values()) { 508 parser.setProperty(f.getPropertyName(), cf.get(f)); 509 } 510 } 511 } catch (SAXNotRecognizedException e) { 512 //shall not happen for internal settings 513 } 514 } 515 516 final XMLReader reader = parser.getXMLReader(); 517 String lastProperty = ""; 518 try { 519 XMLSecurityManager securityManager = 520 (XMLSecurityManager)_xsltc.getProperty(XalanConstants.SECURITY_MANAGER); 521 for (XMLSecurityManager.Limit limit : XMLSecurityManager.Limit.values()) { 522 lastProperty = limit.apiProperty(); 523 reader.setProperty(lastProperty, securityManager.getLimitValueAsString(limit)); 524 } 525 if (securityManager.printEntityCountInfo()) { 526 lastProperty = XalanConstants.JDK_ENTITY_COUNT_INFO; 527 parser.setProperty(XalanConstants.JDK_ENTITY_COUNT_INFO, XalanConstants.JDK_YES); 528 } 529 } catch (SAXException se) { 530 XMLSecurityManager.printWarning(reader.getClass().getName(), lastProperty, se); 531 } 532 533 // try setting other JDK-impl properties, ignore if not supported 534 JdkXmlUtils.setXMLReaderPropertyIfSupport(reader, JdkXmlUtils.CDATA_CHUNK_SIZE, 535 _xsltc.getProperty(JdkXmlUtils.CDATA_CHUNK_SIZE), false); 536 537 return(parse(reader, input)); 538 } 539 catch (ParserConfigurationException e) { 540 ErrorMsg err = new ErrorMsg(ErrorMsg.SAX_PARSER_CONFIG_ERR); 541 reportError(ERROR, err); 542 } 543 catch (SAXParseException e){ 544 reportError(ERROR, new ErrorMsg(e.getMessage(),e.getLineNumber())); 545 } 546 catch (SAXException e) { 547 reportError(ERROR, new ErrorMsg(e.getMessage())); 548 } 549 return null; 550 } 551 552 public SyntaxTreeNode getDocumentRoot() { 553 return _root; 554 } 555 556 private String _PImedia = null; 557 private String _PItitle = null; 558 private String _PIcharset = null; 559 560 /** 561 * Set the parameters to use to locate the correct <?xml-stylesheet ...?> 562 * processing instruction in the case where the input document is an 563 * XML document with one or more references to a stylesheet. 564 * @param media The media attribute to be matched. May be null, in which 565 * case the prefered templates will be used (i.e. alternate = no). 566 * @param title The value of the title attribute to match. May be null. 567 * @param charset The value of the charset attribute to match. May be null. 568 */ 569 protected void setPIParameters(String media, String title, String charset) { 570 _PImedia = media; 571 _PItitle = title; 572 _PIcharset = charset; 573 } 574 575 /** 576 * Extracts the DOM for the stylesheet. In the case of an embedded 577 * stylesheet, it extracts the DOM subtree corresponding to the 578 * embedded stylesheet that has an 'id' attribute whose value is the 579 * same as the value declared in the <?xml-stylesheet...?> processing 580 * instruction (P.I.). In the xml-stylesheet P.I. the value is labeled 581 * as the 'href' data of the P.I. The extracted DOM representing the 582 * stylesheet is returned as an Element object. 583 */ 584 private SyntaxTreeNode getStylesheet(SyntaxTreeNode root) 585 throws CompilerException { 586 587 // Assume that this is a pure XSL stylesheet if there is not 588 // <?xml-stylesheet ....?> processing instruction 589 if (_target == null) { 590 if (!_rootNamespaceDef) { 591 ErrorMsg msg = new ErrorMsg(ErrorMsg.MISSING_XSLT_URI_ERR); 592 throw new CompilerException(msg.toString()); 593 } 594 return(root); 595 } 596 597 // Find the xsl:stylesheet or xsl:transform with this reference 598 if (_target.charAt(0) == '#') { 599 SyntaxTreeNode element = findStylesheet(root, _target.substring(1)); 600 if (element == null) { 601 ErrorMsg msg = new ErrorMsg(ErrorMsg.MISSING_XSLT_TARGET_ERR, 602 _target, root); 603 throw new CompilerException(msg.toString()); 604 } 605 return(element); 606 } 607 else { 608 try { 609 String path = _target; 610 if (path.indexOf(":")==-1) { 611 path = "file:" + path; 612 } 613 path = SystemIDResolver.getAbsoluteURI(path); 614 String accessError = SecuritySupport.checkAccess(path, 615 (String)_xsltc.getProperty(XMLConstants.ACCESS_EXTERNAL_STYLESHEET), 616 XalanConstants.ACCESS_EXTERNAL_ALL); 617 if (accessError != null) { 618 ErrorMsg msg = new ErrorMsg(ErrorMsg.ACCESSING_XSLT_TARGET_ERR, 619 SecuritySupport.sanitizePath(_target), accessError, 620 root); 621 throw new CompilerException(msg.toString()); 622 } 623 } catch (IOException ex) { 624 throw new CompilerException(ex); 625 } 626 627 return(loadExternalStylesheet(_target)); 628 } 629 } 630 631 /** 632 * Find a Stylesheet element with a specific ID attribute value. 633 * This method is used to find a Stylesheet node that is referred 634 * in a <?xml-stylesheet ... ?> processing instruction. 635 */ 636 private SyntaxTreeNode findStylesheet(SyntaxTreeNode root, String href) { 637 638 if (root == null) return null; 639 640 if (root instanceof Stylesheet) { 641 String id = root.getAttribute("id"); 642 if (id.equals(href)) return root; 643 } 644 List<SyntaxTreeNode> children = root.getContents(); 645 if (children != null) { 646 final int count = children.size(); 647 for (int i = 0; i < count; i++) { 648 SyntaxTreeNode child = children.get(i); 649 SyntaxTreeNode node = findStylesheet(child, href); 650 if (node != null) return node; 651 } 652 } 653 return null; 654 } 655 656 /** 657 * For embedded stylesheets: Load an external file with stylesheet 658 */ 659 private SyntaxTreeNode loadExternalStylesheet(String location) 660 throws CompilerException { 661 662 InputSource source; 663 664 // Check if the location is URL or a local file 665 if ((new File(location)).exists()) 666 source = new InputSource("file:"+location); 667 else 668 source = new InputSource(location); 669 670 SyntaxTreeNode external = (SyntaxTreeNode)parse(source); 671 return(external); 672 } 673 674 private void initAttrTable(String elementName, String[] attrs) { 675 _instructionAttrs.put(getQName(XSLT_URI, XSL, elementName).getStringRep(), 676 attrs); 677 } 678 679 private void initInstructionAttrs() { 680 initAttrTable("template", 681 new String[] {"match", "name", "priority", "mode"}); 682 initAttrTable("stylesheet", 683 new String[] {"id", "version", "extension-element-prefixes", 684 "exclude-result-prefixes"}); 685 initAttrTable("transform", 686 new String[] {"id", "version", "extension-element-prefixes", 687 "exclude-result-prefixes"}); 688 initAttrTable("text", new String[] {"disable-output-escaping"}); 689 initAttrTable("if", new String[] {"test"}); 690 initAttrTable("choose", new String[] {}); 691 initAttrTable("when", new String[] {"test"}); 692 initAttrTable("otherwise", new String[] {}); 693 initAttrTable("for-each", new String[] {"select"}); 694 initAttrTable("message", new String[] {"terminate"}); 695 initAttrTable("number", 696 new String[] {"level", "count", "from", "value", "format", "lang", 697 "letter-value", "grouping-separator", "grouping-size"}); 698 initAttrTable("comment", new String[] {}); 699 initAttrTable("copy", new String[] {"use-attribute-sets"}); 700 initAttrTable("copy-of", new String[] {"select"}); 701 initAttrTable("param", new String[] {"name", "select"}); 702 initAttrTable("with-param", new String[] {"name", "select"}); 703 initAttrTable("variable", new String[] {"name", "select"}); 704 initAttrTable("output", 705 new String[] {"method", "version", "encoding", 706 "omit-xml-declaration", "standalone", "doctype-public", 707 "doctype-system", "cdata-section-elements", "indent", 708 "media-type"}); 709 initAttrTable("sort", 710 new String[] {"select", "order", "case-order", "lang", "data-type"}); 711 initAttrTable("key", new String[] {"name", "match", "use"}); 712 initAttrTable("fallback", new String[] {}); 713 initAttrTable("attribute", new String[] {"name", "namespace"}); 714 initAttrTable("attribute-set", 715 new String[] {"name", "use-attribute-sets"}); 716 initAttrTable("value-of", 717 new String[] {"select", "disable-output-escaping"}); 718 initAttrTable("element", 719 new String[] {"name", "namespace", "use-attribute-sets"}); 720 initAttrTable("call-template", new String[] {"name"}); 721 initAttrTable("apply-templates", new String[] {"select", "mode"}); 722 initAttrTable("apply-imports", new String[] {}); 723 initAttrTable("decimal-format", 724 new String[] {"name", "decimal-separator", "grouping-separator", 725 "infinity", "minus-sign", "NaN", "percent", "per-mille", 726 "zero-digit", "digit", "pattern-separator"}); 727 initAttrTable("import", new String[] {"href"}); 728 initAttrTable("include", new String[] {"href"}); 729 initAttrTable("strip-space", new String[] {"elements"}); 730 initAttrTable("preserve-space", new String[] {"elements"}); 731 initAttrTable("processing-instruction", new String[] {"name"}); 732 initAttrTable("namespace-alias", 733 new String[] {"stylesheet-prefix", "result-prefix"}); 734 } 735 736 /** 737 * Initialize the _instructionClasses map, which maps XSL element 738 * names to Java classes in this package. 739 */ 740 private void initStdClasses() { 741 initStdClass("template", "Template"); 742 initStdClass("stylesheet", "Stylesheet"); 743 initStdClass("transform", "Stylesheet"); 744 initStdClass("text", "Text"); 745 initStdClass("if", "If"); 746 initStdClass("choose", "Choose"); 747 initStdClass("when", "When"); 748 initStdClass("otherwise", "Otherwise"); 749 initStdClass("for-each", "ForEach"); 750 initStdClass("message", "Message"); 751 initStdClass("number", "Number"); 752 initStdClass("comment", "Comment"); 753 initStdClass("copy", "Copy"); 754 initStdClass("copy-of", "CopyOf"); 755 initStdClass("param", "Param"); 756 initStdClass("with-param", "WithParam"); 757 initStdClass("variable", "Variable"); 758 initStdClass("output", "Output"); 759 initStdClass("sort", "Sort"); 760 initStdClass("key", "Key"); 761 initStdClass("fallback", "Fallback"); 762 initStdClass("attribute", "XslAttribute"); 763 initStdClass("attribute-set", "AttributeSet"); 764 initStdClass("value-of", "ValueOf"); 765 initStdClass("element", "XslElement"); 766 initStdClass("call-template", "CallTemplate"); 767 initStdClass("apply-templates", "ApplyTemplates"); 768 initStdClass("apply-imports", "ApplyImports"); 769 initStdClass("decimal-format", "DecimalFormatting"); 770 initStdClass("import", "Import"); 771 initStdClass("include", "Include"); 772 initStdClass("strip-space", "Whitespace"); 773 initStdClass("preserve-space", "Whitespace"); 774 initStdClass("processing-instruction", "ProcessingInstruction"); 775 initStdClass("namespace-alias", "NamespaceAlias"); 776 } 777 778 private void initStdClass(String elementName, String className) { 779 _instructionClasses.put(getQName(XSLT_URI, XSL, elementName).getStringRep(), 780 COMPILER_PACKAGE + '.' + className); 781 } 782 783 public boolean elementSupported(String namespace, String localName) { 784 return(_instructionClasses.get(getQName(namespace, XSL, localName).getStringRep()) != null); 785 } 786 787 public boolean functionSupported(String fname) { 788 return(_symbolTable.lookupPrimop(fname) != null); 789 } 790 791 private void initExtClasses() { 792 initExtClass("output", "TransletOutput"); 793 initExtClass(REDIRECT_URI, "write", "TransletOutput"); 794 } 795 796 private void initExtClass(String elementName, String className) { 797 _instructionClasses.put(getQName(TRANSLET_URI, TRANSLET, elementName).getStringRep(), 798 COMPILER_PACKAGE + '.' + className); 799 } 800 801 private void initExtClass(String namespace, String elementName, String className) { 802 _instructionClasses.put(getQName(namespace, TRANSLET, elementName).getStringRep(), 803 COMPILER_PACKAGE + '.' + className); 804 } 805 806 /** 807 * Add primops and base functions to the symbol table. 808 */ 809 @SuppressWarnings("unused") 810 private void initSymbolTable() { 811 MethodType I_V = new MethodType(Type.Int, Type.Void); 812 MethodType I_R = new MethodType(Type.Int, Type.Real); 813 MethodType I_S = new MethodType(Type.Int, Type.String); 814 MethodType I_D = new MethodType(Type.Int, Type.NodeSet); 815 MethodType R_I = new MethodType(Type.Real, Type.Int); 816 MethodType R_V = new MethodType(Type.Real, Type.Void); 817 MethodType R_R = new MethodType(Type.Real, Type.Real); 818 MethodType R_D = new MethodType(Type.Real, Type.NodeSet); 819 MethodType R_O = new MethodType(Type.Real, Type.Reference); 820 MethodType I_I = new MethodType(Type.Int, Type.Int); 821 MethodType D_O = new MethodType(Type.NodeSet, Type.Reference); 822 MethodType D_V = new MethodType(Type.NodeSet, Type.Void); 823 MethodType D_S = new MethodType(Type.NodeSet, Type.String); 824 MethodType D_D = new MethodType(Type.NodeSet, Type.NodeSet); 825 MethodType A_V = new MethodType(Type.Node, Type.Void); 826 MethodType S_V = new MethodType(Type.String, Type.Void); 827 MethodType S_S = new MethodType(Type.String, Type.String); 828 MethodType S_A = new MethodType(Type.String, Type.Node); 829 MethodType S_D = new MethodType(Type.String, Type.NodeSet); 830 MethodType S_O = new MethodType(Type.String, Type.Reference); 831 MethodType B_O = new MethodType(Type.Boolean, Type.Reference); 832 MethodType B_V = new MethodType(Type.Boolean, Type.Void); 833 MethodType B_B = new MethodType(Type.Boolean, Type.Boolean); 834 MethodType B_S = new MethodType(Type.Boolean, Type.String); 835 MethodType D_X = new MethodType(Type.NodeSet, Type.Object); 836 MethodType R_RR = new MethodType(Type.Real, Type.Real, Type.Real); 837 MethodType I_II = new MethodType(Type.Int, Type.Int, Type.Int); 838 MethodType B_RR = new MethodType(Type.Boolean, Type.Real, Type.Real); 839 MethodType B_II = new MethodType(Type.Boolean, Type.Int, Type.Int); 840 MethodType S_SS = new MethodType(Type.String, Type.String, Type.String); 841 MethodType S_DS = new MethodType(Type.String, Type.Real, Type.String); 842 MethodType S_SR = new MethodType(Type.String, Type.String, Type.Real); 843 MethodType O_SO = new MethodType(Type.Reference, Type.String, Type.Reference); 844 845 MethodType D_SS = 846 new MethodType(Type.NodeSet, Type.String, Type.String); 847 MethodType D_SD = 848 new MethodType(Type.NodeSet, Type.String, Type.NodeSet); 849 MethodType B_BB = 850 new MethodType(Type.Boolean, Type.Boolean, Type.Boolean); 851 MethodType B_SS = 852 new MethodType(Type.Boolean, Type.String, Type.String); 853 MethodType S_SD = 854 new MethodType(Type.String, Type.String, Type.NodeSet); 855 MethodType S_DSS = 856 new MethodType(Type.String, Type.Real, Type.String, Type.String); 857 MethodType S_SRR = 858 new MethodType(Type.String, Type.String, Type.Real, Type.Real); 859 MethodType S_SSS = 860 new MethodType(Type.String, Type.String, Type.String, Type.String); 861 862 /* 863 * Standard functions: implemented but not in this table concat(). 864 * When adding a new function make sure to uncomment 865 * the corresponding line in <tt>FunctionAvailableCall</tt>. 866 */ 867 868 // The following functions are inlined 869 870 _symbolTable.addPrimop("current", A_V); 871 _symbolTable.addPrimop("last", I_V); 872 _symbolTable.addPrimop("position", I_V); 873 _symbolTable.addPrimop("true", B_V); 874 _symbolTable.addPrimop("false", B_V); 875 _symbolTable.addPrimop("not", B_B); 876 _symbolTable.addPrimop("name", S_V); 877 _symbolTable.addPrimop("name", S_A); 878 _symbolTable.addPrimop("generate-id", S_V); 879 _symbolTable.addPrimop("generate-id", S_A); 880 _symbolTable.addPrimop("ceiling", R_R); 881 _symbolTable.addPrimop("floor", R_R); 882 _symbolTable.addPrimop("round", R_R); 883 _symbolTable.addPrimop("contains", B_SS); 884 _symbolTable.addPrimop("number", R_O); 885 _symbolTable.addPrimop("number", R_V); 886 _symbolTable.addPrimop("boolean", B_O); 887 _symbolTable.addPrimop("string", S_O); 888 _symbolTable.addPrimop("string", S_V); 889 _symbolTable.addPrimop("translate", S_SSS); 890 _symbolTable.addPrimop("string-length", I_V); 891 _symbolTable.addPrimop("string-length", I_S); 892 _symbolTable.addPrimop("starts-with", B_SS); 893 _symbolTable.addPrimop("format-number", S_DS); 894 _symbolTable.addPrimop("format-number", S_DSS); 895 _symbolTable.addPrimop("unparsed-entity-uri", S_S); 896 _symbolTable.addPrimop("key", D_SS); 897 _symbolTable.addPrimop("key", D_SD); 898 _symbolTable.addPrimop("id", D_S); 899 _symbolTable.addPrimop("id", D_D); 900 _symbolTable.addPrimop("namespace-uri", S_V); 901 _symbolTable.addPrimop("function-available", B_S); 902 _symbolTable.addPrimop("element-available", B_S); 903 _symbolTable.addPrimop("document", D_S); 904 _symbolTable.addPrimop("document", D_V); 905 906 // The following functions are implemented in the basis library 907 _symbolTable.addPrimop("count", I_D); 908 _symbolTable.addPrimop("sum", R_D); 909 _symbolTable.addPrimop("local-name", S_V); 910 _symbolTable.addPrimop("local-name", S_D); 911 _symbolTable.addPrimop("namespace-uri", S_V); 912 _symbolTable.addPrimop("namespace-uri", S_D); 913 _symbolTable.addPrimop("substring", S_SR); 914 _symbolTable.addPrimop("substring", S_SRR); 915 _symbolTable.addPrimop("substring-after", S_SS); 916 _symbolTable.addPrimop("substring-before", S_SS); 917 _symbolTable.addPrimop("normalize-space", S_V); 918 _symbolTable.addPrimop("normalize-space", S_S); 919 _symbolTable.addPrimop("system-property", S_S); 920 921 // Extensions 922 _symbolTable.addPrimop("nodeset", D_O); 923 _symbolTable.addPrimop("objectType", S_O); 924 _symbolTable.addPrimop("cast", O_SO); 925 926 // Operators +, -, *, /, % defined on real types. 927 _symbolTable.addPrimop("+", R_RR); 928 _symbolTable.addPrimop("-", R_RR); 929 _symbolTable.addPrimop("*", R_RR); 930 _symbolTable.addPrimop("/", R_RR); 931 _symbolTable.addPrimop("%", R_RR); 932 933 // Operators +, -, * defined on integer types. 934 // Operators / and % are not defined on integers (may cause exception) 935 _symbolTable.addPrimop("+", I_II); 936 _symbolTable.addPrimop("-", I_II); 937 _symbolTable.addPrimop("*", I_II); 938 939 // Operators <, <= >, >= defined on real types. 940 _symbolTable.addPrimop("<", B_RR); 941 _symbolTable.addPrimop("<=", B_RR); 942 _symbolTable.addPrimop(">", B_RR); 943 _symbolTable.addPrimop(">=", B_RR); 944 945 // Operators <, <= >, >= defined on int types. 946 _symbolTable.addPrimop("<", B_II); 947 _symbolTable.addPrimop("<=", B_II); 948 _symbolTable.addPrimop(">", B_II); 949 _symbolTable.addPrimop(">=", B_II); 950 951 // Operators <, <= >, >= defined on boolean types. 952 _symbolTable.addPrimop("<", B_BB); 953 _symbolTable.addPrimop("<=", B_BB); 954 _symbolTable.addPrimop(">", B_BB); 955 _symbolTable.addPrimop(">=", B_BB); 956 957 // Operators 'and' and 'or'. 958 _symbolTable.addPrimop("or", B_BB); 959 _symbolTable.addPrimop("and", B_BB); 960 961 // Unary minus. 962 _symbolTable.addPrimop("u-", R_R); 963 _symbolTable.addPrimop("u-", I_I); 964 } 965 966 public SymbolTable getSymbolTable() { 967 return _symbolTable; 968 } 969 970 public Template getTemplate() { 971 return _template; 972 } 973 974 public void setTemplate(Template template) { 975 _template = template; 976 } 977 978 private int _templateIndex = 0; 979 980 public int getTemplateIndex() { 981 return(_templateIndex++); 982 } 983 984 /** 985 * Creates a new node in the abstract syntax tree. This node can be 986 * o) a supported XSLT 1.0 element 987 * o) an unsupported XSLT element (post 1.0) 988 * o) a supported XSLT extension 989 * o) an unsupported XSLT extension 990 * o) a literal result element (not an XSLT element and not an extension) 991 * Unsupported elements do not directly generate an error. We have to wait 992 * until we have received all child elements of an unsupported element to 993 * see if any <xsl:fallback> elements exist. 994 */ 995 996 private boolean versionIsOne = true; 997 998 public SyntaxTreeNode makeInstance(String uri, String prefix, 999 String local, Attributes attributes) 1000 { 1001 SyntaxTreeNode node = null; 1002 QName qname = getQName(uri, prefix, local); 1003 String className = _instructionClasses.get(qname.getStringRep()); 1004 1005 if (className != null) { 1006 try { 1007 final Class<?> clazz = ObjectFactory.findProviderClass(className, true); 1008 node = (SyntaxTreeNode)clazz.newInstance(); 1009 node.setQName(qname); 1010 node.setParser(this); 1011 if (_locator != null) { 1012 node.setLineNumber(getLineNumber()); 1013 } 1014 if (node instanceof Stylesheet) { 1015 _xsltc.setStylesheet((Stylesheet)node); 1016 } 1017 checkForSuperfluousAttributes(node, attributes); 1018 } 1019 catch (ClassNotFoundException e) { 1020 ErrorMsg err = new ErrorMsg(ErrorMsg.CLASS_NOT_FOUND_ERR, node); 1021 reportError(ERROR, err); 1022 } 1023 catch (Exception e) { 1024 ErrorMsg err = new ErrorMsg(ErrorMsg.INTERNAL_ERR, 1025 e.getMessage(), node); 1026 reportError(FATAL, err); 1027 } 1028 } 1029 else { 1030 if (uri != null) { 1031 // Check if the element belongs in our namespace 1032 if (uri.equals(XSLT_URI)) { 1033 node = new UnsupportedElement(uri, prefix, local, false); 1034 UnsupportedElement element = (UnsupportedElement)node; 1035 ErrorMsg msg = new ErrorMsg(ErrorMsg.UNSUPPORTED_XSL_ERR, 1036 getLineNumber(),local); 1037 element.setErrorMessage(msg); 1038 if (versionIsOne) { 1039 reportError(UNSUPPORTED,msg); 1040 } 1041 } 1042 // Check if this is an XSLTC extension element 1043 else if (uri.equals(TRANSLET_URI)) { 1044 node = new UnsupportedElement(uri, prefix, local, true); 1045 UnsupportedElement element = (UnsupportedElement)node; 1046 ErrorMsg msg = new ErrorMsg(ErrorMsg.UNSUPPORTED_EXT_ERR, 1047 getLineNumber(),local); 1048 element.setErrorMessage(msg); 1049 } 1050 // Check if this is an extension of some other XSLT processor 1051 else { 1052 Stylesheet sheet = _xsltc.getStylesheet(); 1053 if ((sheet != null) && (sheet.isExtension(uri))) { 1054 if (sheet != _parentStack.peek()) { 1055 node = new UnsupportedElement(uri, prefix, local, true); 1056 UnsupportedElement elem = (UnsupportedElement)node; 1057 ErrorMsg msg = 1058 new ErrorMsg(ErrorMsg.UNSUPPORTED_EXT_ERR, 1059 getLineNumber(), 1060 prefix+":"+local); 1061 elem.setErrorMessage(msg); 1062 } 1063 } 1064 } 1065 } 1066 if (node == null) { 1067 node = new LiteralElement(); 1068 node.setLineNumber(getLineNumber()); 1069 } 1070 } 1071 if ((node != null) && (node instanceof LiteralElement)) { 1072 ((LiteralElement)node).setQName(qname); 1073 } 1074 return(node); 1075 } 1076 1077 /** 1078 * checks the list of attributes against a list of allowed attributes 1079 * for a particular element node. 1080 */ 1081 private void checkForSuperfluousAttributes(SyntaxTreeNode node, 1082 Attributes attrs) 1083 { 1084 QName qname = node.getQName(); 1085 boolean isStylesheet = (node instanceof Stylesheet); 1086 String[] legal = _instructionAttrs.get(qname.getStringRep()); 1087 if (versionIsOne && legal != null) { 1088 int j; 1089 final int n = attrs.getLength(); 1090 1091 for (int i = 0; i < n; i++) { 1092 final String attrQName = attrs.getQName(i); 1093 1094 if (isStylesheet && attrQName.equals("version")) { 1095 versionIsOne = attrs.getValue(i).equals("1.0"); 1096 } 1097 1098 // Ignore if special or if it has a prefix 1099 if (attrQName.startsWith("xml") || 1100 attrQName.indexOf(':') > 0) continue; 1101 1102 for (j = 0; j < legal.length; j++) { 1103 if (attrQName.equalsIgnoreCase(legal[j])) { 1104 break; 1105 } 1106 } 1107 if (j == legal.length) { 1108 final ErrorMsg err = 1109 new ErrorMsg(ErrorMsg.ILLEGAL_ATTRIBUTE_ERR, 1110 attrQName, node); 1111 // Workaround for the TCK failure ErrorListener.errorTests.error001.. 1112 err.setWarningError(true); 1113 reportError(WARNING, err); 1114 } 1115 } 1116 } 1117 } 1118 1119 1120 /** 1121 * Parse an XPath expression: 1122 * @param parent - XSL element where the expression occured 1123 * @param exp - textual representation of the expression 1124 */ 1125 public Expression parseExpression(SyntaxTreeNode parent, String exp) { 1126 return (Expression)parseTopLevel(parent, "<EXPRESSION>"+exp, null); 1127 } 1128 1129 /** 1130 * Parse an XPath expression: 1131 * @param parent - XSL element where the expression occured 1132 * @param attr - name of this element's attribute to get expression from 1133 * @param def - default expression (if the attribute was not found) 1134 */ 1135 public Expression parseExpression(SyntaxTreeNode parent, 1136 String attr, String def) { 1137 // Get the textual representation of the expression (if any) 1138 String exp = parent.getAttribute(attr); 1139 // Use the default expression if none was found 1140 if ((exp.length() == 0) && (def != null)) exp = def; 1141 // Invoke the XPath parser 1142 return (Expression)parseTopLevel(parent, "<EXPRESSION>"+exp, exp); 1143 } 1144 1145 /** 1146 * Parse an XPath pattern: 1147 * @param parent - XSL element where the pattern occured 1148 * @param pattern - textual representation of the pattern 1149 */ 1150 public Pattern parsePattern(SyntaxTreeNode parent, String pattern) { 1151 return (Pattern)parseTopLevel(parent, "<PATTERN>"+pattern, pattern); 1152 } 1153 1154 /** 1155 * Parse an XPath pattern: 1156 * @param parent - XSL element where the pattern occured 1157 * @param attr - name of this element's attribute to get pattern from 1158 * @param def - default pattern (if the attribute was not found) 1159 */ 1160 public Pattern parsePattern(SyntaxTreeNode parent, 1161 String attr, String def) { 1162 // Get the textual representation of the pattern (if any) 1163 String pattern = parent.getAttribute(attr); 1164 // Use the default pattern if none was found 1165 if ((pattern.length() == 0) && (def != null)) pattern = def; 1166 // Invoke the XPath parser 1167 return (Pattern)parseTopLevel(parent, "<PATTERN>"+pattern, pattern); 1168 } 1169 1170 /** 1171 * Parse an XPath expression or pattern using the generated XPathParser 1172 * The method will return a Dummy node if the XPath parser fails. 1173 */ 1174 private SyntaxTreeNode parseTopLevel(SyntaxTreeNode parent, String text, 1175 String expression) { 1176 int line = getLineNumber(); 1177 1178 try { 1179 _xpathParser.setScanner(new XPathLexer(new StringReader(text))); 1180 Symbol result = _xpathParser.parse(expression, line); 1181 if (result != null) { 1182 final SyntaxTreeNode node = (SyntaxTreeNode)result.value; 1183 if (node != null) { 1184 node.setParser(this); 1185 node.setParent(parent); 1186 node.setLineNumber(line); 1187 return node; 1188 } 1189 } 1190 reportError(ERROR, new ErrorMsg(ErrorMsg.XPATH_PARSER_ERR, 1191 expression, parent)); 1192 } 1193 catch (Exception e) { 1194 if (_xsltc.debug()) e.printStackTrace(); 1195 reportError(ERROR, new ErrorMsg(ErrorMsg.XPATH_PARSER_ERR, 1196 expression, parent)); 1197 } 1198 1199 // Return a dummy pattern (which is an expression) 1200 SyntaxTreeNode.Dummy.setParser(this); 1201 return SyntaxTreeNode.Dummy; 1202 } 1203 1204 /************************ ERROR HANDLING SECTION ************************/ 1205 1206 /** 1207 * Returns true if there were any errors during compilation 1208 */ 1209 public boolean errorsFound() { 1210 return _errors.size() > 0; 1211 } 1212 1213 /** 1214 * Prints all compile-time errors 1215 */ 1216 public void printErrors() { 1217 final int size = _errors.size(); 1218 if (size > 0) { 1219 System.err.println(new ErrorMsg(ErrorMsg.COMPILER_ERROR_KEY)); 1220 for (int i = 0; i < size; i++) { 1221 System.err.println(" " + _errors.get(i)); 1222 } 1223 } 1224 } 1225 1226 /** 1227 * Prints all compile-time warnings 1228 */ 1229 public void printWarnings() { 1230 final int size = _warnings.size(); 1231 if (size > 0) { 1232 System.err.println(new ErrorMsg(ErrorMsg.COMPILER_WARNING_KEY)); 1233 for (int i = 0; i < size; i++) { 1234 System.err.println(" " + _warnings.get(i)); 1235 } 1236 } 1237 } 1238 1239 /** 1240 * Common error/warning message handler 1241 */ 1242 public void reportError(final int category, final ErrorMsg error) { 1243 switch (category) { 1244 case Constants.INTERNAL: 1245 // Unexpected internal errors, such as null-ptr exceptions, etc. 1246 // Immediately terminates compilation, no translet produced 1247 _errors.add(error); 1248 break; 1249 case Constants.UNSUPPORTED: 1250 // XSLT elements that are not implemented and unsupported ext. 1251 // Immediately terminates compilation, no translet produced 1252 _errors.add(error); 1253 break; 1254 case Constants.FATAL: 1255 // Fatal error in the stylesheet input (parsing or content) 1256 // Immediately terminates compilation, no translet produced 1257 _errors.add(error); 1258 break; 1259 case Constants.ERROR: 1260 // Other error in the stylesheet input (parsing or content) 1261 // Does not terminate compilation, no translet produced 1262 _errors.add(error); 1263 break; 1264 case Constants.WARNING: 1265 // Other error in the stylesheet input (content errors only) 1266 // Does not terminate compilation, a translet is produced 1267 _warnings.add(error); 1268 break; 1269 } 1270 } 1271 1272 public ArrayList<ErrorMsg> getErrors() { 1273 return _errors; 1274 } 1275 1276 public ArrayList<ErrorMsg> getWarnings() { 1277 return _warnings; 1278 } 1279 1280 /************************ SAX2 ContentHandler INTERFACE *****************/ 1281 1282 private Stack<SyntaxTreeNode> _parentStack = null; 1283 private Map<String, String> _prefixMapping = null; 1284 1285 /** 1286 * SAX2: Receive notification of the beginning of a document. 1287 */ 1288 public void startDocument() { 1289 _root = null; 1290 _target = null; 1291 _prefixMapping = null; 1292 _parentStack = new Stack<>(); 1293 } 1294 1295 /** 1296 * SAX2: Receive notification of the end of a document. 1297 */ 1298 public void endDocument() { } 1299 1300 1301 /** 1302 * SAX2: Begin the scope of a prefix-URI Namespace mapping. 1303 * This has to be passed on to the symbol table! 1304 */ 1305 public void startPrefixMapping(String prefix, String uri) { 1306 if (_prefixMapping == null) { 1307 _prefixMapping = new HashMap<>(); 1308 } 1309 _prefixMapping.put(prefix, uri); 1310 } 1311 1312 /** 1313 * SAX2: End the scope of a prefix-URI Namespace mapping. 1314 * This has to be passed on to the symbol table! 1315 */ 1316 public void endPrefixMapping(String prefix) { } 1317 1318 /** 1319 * SAX2: Receive notification of the beginning of an element. 1320 * The parser may re-use the attribute list that we're passed so 1321 * we clone the attributes in our own Attributes implementation 1322 */ 1323 public void startElement(String uri, String localname, 1324 String qname, Attributes attributes) 1325 throws SAXException { 1326 final int col = qname.lastIndexOf(':'); 1327 final String prefix = (col == -1) ? null : qname.substring(0, col); 1328 1329 SyntaxTreeNode element = makeInstance(uri, prefix, 1330 localname, attributes); 1331 if (element == null) { 1332 ErrorMsg err = new ErrorMsg(ErrorMsg.ELEMENT_PARSE_ERR, 1333 prefix+':'+localname); 1334 throw new SAXException(err.toString()); 1335 } 1336 1337 // If this is the root element of the XML document we need to make sure 1338 // that it contains a definition of the XSL namespace URI 1339 if (_root == null) { 1340 if ((_prefixMapping == null) || 1341 (_prefixMapping.containsValue(Constants.XSLT_URI) == false)) 1342 _rootNamespaceDef = false; 1343 else 1344 _rootNamespaceDef = true; 1345 _root = element; 1346 } 1347 else { 1348 SyntaxTreeNode parent = _parentStack.peek(); 1349 1350 if (element.getClass().isAssignableFrom(Import.class) && 1351 parent.notTypeOf(Import.class)) { 1352 ErrorMsg err = new ErrorMsg(ErrorMsg.IMPORT_PRECEDE_OTHERS_ERR, 1353 prefix+':'+localname); 1354 throw new SAXException(err.toString()); 1355 } 1356 1357 parent.addElement(element); 1358 element.setParent(parent); 1359 } 1360 element.setAttributes(new AttributesImpl(attributes)); 1361 element.setPrefixMapping(_prefixMapping); 1362 1363 if (element instanceof Stylesheet) { 1364 // Extension elements and excluded elements have to be 1365 // handled at this point in order to correctly generate 1366 // Fallback elements from <xsl:fallback>s. 1367 getSymbolTable().setCurrentNode(element); 1368 ((Stylesheet)element).declareExtensionPrefixes(this); 1369 } 1370 1371 _prefixMapping = null; 1372 _parentStack.push(element); 1373 } 1374 1375 /** 1376 * SAX2: Receive notification of the end of an element. 1377 */ 1378 public void endElement(String uri, String localname, String qname) { 1379 _parentStack.pop(); 1380 } 1381 1382 /** 1383 * SAX2: Receive notification of character data. 1384 */ 1385 public void characters(char[] ch, int start, int length) { 1386 String string = new String(ch, start, length); 1387 SyntaxTreeNode parent = _parentStack.peek(); 1388 1389 if (string.length() == 0) return; 1390 1391 // If this text occurs within an <xsl:text> element we append it 1392 // as-is to the existing text element 1393 if (parent instanceof Text) { 1394 ((Text)parent).setText(string); 1395 return; 1396 } 1397 1398 // Ignore text nodes that occur directly under <xsl:stylesheet> 1399 if (parent instanceof Stylesheet) return; 1400 1401 SyntaxTreeNode bro = parent.lastChild(); 1402 if ((bro != null) && (bro instanceof Text)) { 1403 Text text = (Text)bro; 1404 if (!text.isTextElement()) { 1405 if ((length > 1) || ( ((int)ch[0]) < 0x100)) { 1406 text.setText(string); 1407 return; 1408 } 1409 } 1410 } 1411 1412 // Add it as a regular text node otherwise 1413 parent.addElement(new Text(string)); 1414 } 1415 1416 private String getTokenValue(String token) { 1417 final int start = token.indexOf('"'); 1418 final int stop = token.lastIndexOf('"'); 1419 return token.substring(start+1, stop); 1420 } 1421 1422 /** 1423 * SAX2: Receive notification of a processing instruction. 1424 * These require special handling for stylesheet PIs. 1425 */ 1426 public void processingInstruction(String name, String value) { 1427 // We only handle the <?xml-stylesheet ...?> PI 1428 if ((_target == null) && (name.equals("xml-stylesheet"))) { 1429 1430 String href = null; // URI of stylesheet found 1431 String media = null; // Media of stylesheet found 1432 String title = null; // Title of stylesheet found 1433 String charset = null; // Charset of stylesheet found 1434 1435 // Get the attributes from the processing instruction 1436 StringTokenizer tokens = new StringTokenizer(value); 1437 while (tokens.hasMoreElements()) { 1438 String token = (String)tokens.nextElement(); 1439 if (token.startsWith("href")) 1440 href = getTokenValue(token); 1441 else if (token.startsWith("media")) 1442 media = getTokenValue(token); 1443 else if (token.startsWith("title")) 1444 title = getTokenValue(token); 1445 else if (token.startsWith("charset")) 1446 charset = getTokenValue(token); 1447 } 1448 1449 // Set the target to this PI's href if the parameters are 1450 // null or match the corresponding attributes of this PI. 1451 if ( ((_PImedia == null) || (_PImedia.equals(media))) && 1452 ((_PItitle == null) || (_PImedia.equals(title))) && 1453 ((_PIcharset == null) || (_PImedia.equals(charset))) ) { 1454 _target = href; 1455 } 1456 } 1457 } 1458 1459 /** 1460 * IGNORED - all ignorable whitespace is ignored 1461 */ 1462 public void ignorableWhitespace(char[] ch, int start, int length) { } 1463 1464 /** 1465 * IGNORED - we do not have to do anything with skipped entities 1466 */ 1467 public void skippedEntity(String name) { } 1468 1469 /** 1470 * Store the document locator to later retrieve line numbers of all 1471 * elements from the stylesheet 1472 */ 1473 public void setDocumentLocator(Locator locator) { 1474 _locator = locator; 1475 } 1476 1477 /** 1478 * Get the line number, or zero 1479 * if there is no _locator. 1480 */ 1481 private int getLineNumber() { 1482 int line = 0; 1483 if (_locator != null) 1484 line = _locator.getLineNumber(); 1485 return line; 1486 } 1487 1488} 1489