1 // NamespaceSupport.java - generic Namespace support for SAX. 2 // http://www.saxproject.org 3 // Written by David Megginson 4 // This class is in the Public Domain. NO WARRANTY! 5 // $Id: NamespaceSupport.java,v 1.15 2004/04/26 17:34:35 dmegginson Exp $ 6 7 package org.xml.sax.helpers; 8 9 import java.util.ArrayList; 10 import java.util.Collections; 11 import java.util.EmptyStackException; 12 import java.util.Enumeration; 13 import java.util.Hashtable; 14 15 /** 16 * Encapsulate Namespace logic for use by applications using SAX, 17 * or internally by SAX drivers. 18 * 19 * <blockquote> 20 * <em>This module, both source code and documentation, is in the 21 * Public Domain, and comes with <strong>NO WARRANTY</strong>.</em> 22 * See <a href='http://www.saxproject.org'>http://www.saxproject.org</a> 23 * for further information. 24 * </blockquote> 25 * 26 * <p>This class encapsulates the logic of Namespace processing: it 27 * tracks the declarations currently in force for each context and 28 * automatically processes qualified XML names into their Namespace 29 * parts; it can also be used in reverse for generating XML qnames 30 * from Namespaces.</p> 31 * 32 * <p>Namespace support objects are reusable, but the reset method 33 * must be invoked between each session.</p> 34 * 35 * <p>Here is a simple session:</p> 36 * 37 * <pre> 38 * String parts[] = new String[3]; 39 * NamespaceSupport support = new NamespaceSupport(); 40 * 41 * support.pushContext(); 42 * support.declarePrefix("", "http://www.w3.org/1999/xhtml"); 43 * support.declarePrefix("dc", "http://www.purl.org/dc#"); 44 * 45 * parts = support.processName("p", parts, false); 46 * System.out.println("Namespace URI: " + parts[0]); 47 * System.out.println("Local name: " + parts[1]); 48 * System.out.println("Raw name: " + parts[2]); 49 * 50 * parts = support.processName("dc:title", parts, false); 51 * System.out.println("Namespace URI: " + parts[0]); 52 * System.out.println("Local name: " + parts[1]); 53 * System.out.println("Raw name: " + parts[2]); 54 * 55 * support.popContext(); 56 * </pre> 57 * 58 * <p>Note that this class is optimized for the use case where most 59 * elements do not contain Namespace declarations: if the same 60 * prefix/URI mapping is repeated for each context (for example), this 61 * class will be somewhat less efficient.</p> 62 * 63 * <p>Although SAX drivers (parsers) may choose to use this class to 64 * implement namespace handling, they are not required to do so. 65 * Applications must track namespace information themselves if they 66 * want to use namespace information. 67 * 68 * @since SAX 2.0 69 * @author David Megginson 70 * @version 2.0.1 (sax2r2) 71 */ 72 public class NamespaceSupport 73 { 74 75 76 //////////////////////////////////////////////////////////////////// 78 // Constants. 79 //////////////////////////////////////////////////////////////////// 80 81 82 /** 83 * The XML Namespace URI as a constant. 84 * The value is <code>http://www.w3.org/XML/1998/namespace</code> 85 * as defined in the "Namespaces in XML" * recommendation. 86 * 87 * <p>This is the Namespace URI that is automatically mapped 88 * to the "xml" prefix.</p> 89 */ 90 public static final String XMLNS = 91 "http://www.w3.org/XML/1998/namespace"; 92 93 94 /** 95 * The namespace declaration URI as a constant. 96 * The value is <code>http://www.w3.org/xmlns/2000/</code>, as defined 97 * in a backwards-incompatible erratum to the "Namespaces in XML" 98 * recommendation. Because that erratum postdated SAX2, SAX2 defaults 99 * to the original recommendation, and does not normally use this URI. 100 * 101 * 102 * <p>This is the Namespace URI that is optionally applied to 103 * <em>xmlns</em> and <em>xmlns:*</em> attributes, which are used to 104 * declare namespaces. </p> 105 * 106 * @since SAX 2.1alpha 107 * @see #setNamespaceDeclUris 108 * @see #isNamespaceDeclUris 109 */ 110 public static final String NSDECL = 111 "http://www.w3.org/xmlns/2000/"; 112 113 114 /** 115 * An empty enumeration. 116 */ 117 private static final Enumeration EMPTY_ENUMERATION = Collections.enumeration(Collections.emptyList()); 118 119 120 //////////////////////////////////////////////////////////////////// 122 // Constructor. 123 //////////////////////////////////////////////////////////////////// 124 125 126 /** 127 * Create a new Namespace support object. 128 */ 129 public NamespaceSupport () 130 { 131 reset(); 132 } 133 134 135 136 //////////////////////////////////////////////////////////////////// 138 // Context management. 139 //////////////////////////////////////////////////////////////////// 140 141 142 /** 143 * Reset this Namespace support object for reuse. 144 * 145 * <p>It is necessary to invoke this method before reusing the 146 * Namespace support object for a new session. If namespace 147 * declaration URIs are to be supported, that flag must also 148 * be set to a non-default value. 149 * </p> 150 * 151 * @see #setNamespaceDeclUris 152 */ 153 public void reset () 154 { 155 contexts = new Context[32]; 156 namespaceDeclUris = false; 157 contextPos = 0; 158 contexts[contextPos] = currentContext = new Context(); 159 currentContext.declarePrefix("xml", XMLNS); 160 } 161 162 163 /** 164 * Start a new Namespace context. 165 * The new context will automatically inherit 166 * the declarations of its parent context, but it will also keep 167 * track of which declarations were made within this context. 168 * 169 * <p>Event callback code should start a new context once per element. 170 * This means being ready to call this in either of two places. 171 * For elements that don't include namespace declarations, the 172 * <em>ContentHandler.startElement()</em> callback is the right place. 173 * For elements with such a declaration, it'd done in the first 174 * <em>ContentHandler.startPrefixMapping()</em> callback. 175 * A boolean flag can be used to 176 * track whether a context has been started yet. When either of 177 * those methods is called, it checks the flag to see if a new context 178 * needs to be started. If so, it starts the context and sets the 179 * flag. After <em>ContentHandler.startElement()</em> 180 * does that, it always clears the flag. 181 * 182 * <p>Normally, SAX drivers would push a new context at the beginning 183 * of each XML element. Then they perform a first pass over the 184 * attributes to process all namespace declarations, making 185 * <em>ContentHandler.startPrefixMapping()</em> callbacks. 186 * Then a second pass is made, to determine the namespace-qualified 187 * names for all attributes and for the element name. 188 * Finally all the information for the 189 * <em>ContentHandler.startElement()</em> callback is available, 190 * so it can then be made. 191 * 192 * <p>The Namespace support object always starts with a base context 193 * already in force: in this context, only the "xml" prefix is 194 * declared.</p> 195 * 196 * @see org.xml.sax.ContentHandler 197 * @see #popContext 198 */ 199 public void pushContext () 200 { 201 int max = contexts.length; 202 203 contexts [contextPos].declsOK = false; 204 contextPos++; 205 206 // Extend the array if necessary 207 if (contextPos >= max) { 208 Context newContexts[] = new Context[max*2]; 209 System.arraycopy(contexts, 0, newContexts, 0, max); 210 max *= 2; 211 contexts = newContexts; 212 } 213 214 // Allocate the context if necessary. 215 currentContext = contexts[contextPos]; 216 if (currentContext == null) { 217 contexts[contextPos] = currentContext = new Context(); 218 } 219 220 // Set the parent, if any. 221 if (contextPos > 0) { 222 currentContext.setParent(contexts[contextPos - 1]); 223 } 224 } 225 226 227 /** 228 * Revert to the previous Namespace context. 229 * 230 * <p>Normally, you should pop the context at the end of each 231 * XML element. After popping the context, all Namespace prefix 232 * mappings that were previously in force are restored.</p> 233 * 234 * <p>You must not attempt to declare additional Namespace 235 * prefixes after popping a context, unless you push another 236 * context first.</p> 237 * 238 * @see #pushContext 239 */ 240 public void popContext () 241 { 242 contexts[contextPos].clear(); 243 contextPos--; 244 if (contextPos < 0) { 245 throw new EmptyStackException(); 246 } 247 currentContext = contexts[contextPos]; 248 } 249 250 251 252 //////////////////////////////////////////////////////////////////// 254 // Operations within a context. 255 //////////////////////////////////////////////////////////////////// 256 257 258 /** 259 * Declare a Namespace prefix. All prefixes must be declared 260 * before they are referenced. For example, a SAX driver (parser) 261 * would scan an element's attributes 262 * in two passes: first for namespace declarations, 263 * then a second pass using {@link #processName processName()} to 264 * interpret prefixes against (potentially redefined) prefixes. 265 * 266 * <p>This method declares a prefix in the current Namespace 267 * context; the prefix will remain in force until this context 268 * is popped, unless it is shadowed in a descendant context.</p> 269 * 270 * <p>To declare the default element Namespace, use the empty string as 271 * the prefix.</p> 272 * 273 * <p>Note that you must <em>not</em> declare a prefix after 274 * you've pushed and popped another Namespace context, or 275 * treated the declarations phase as complete by processing 276 * a prefixed name.</p> 277 * 278 * <p>Note that there is an asymmetry in this library: {@link 279 * #getPrefix getPrefix} will not return the "" prefix, 280 * even if you have declared a default element namespace. 281 * To check for a default namespace, 282 * you have to look it up explicitly using {@link #getURI getURI}. 283 * This asymmetry exists to make it easier to look up prefixes 284 * for attribute names, where the default prefix is not allowed.</p> 285 * 286 * @param prefix The prefix to declare, or the empty string to 287 * indicate the default element namespace. This may never have 288 * the value "xml" or "xmlns". 289 * @param uri The Namespace URI to associate with the prefix. 290 * @return true if the prefix was legal, false otherwise 291 * 292 * @see #processName 293 * @see #getURI 294 * @see #getPrefix 295 */ 296 public boolean declarePrefix (String prefix, String uri) 297 { 298 if (prefix.equals("xml") || prefix.equals("xmlns")) { 299 return false; 300 } else { 301 currentContext.declarePrefix(prefix, uri); 302 return true; 303 } 304 } 305 306 307 /** 308 * Process a raw XML qualified name, after all declarations in the 309 * current context have been handled by {@link #declarePrefix 310 * declarePrefix()}. 311 * 312 * <p>This method processes a raw XML qualified name in the 313 * current context by removing the prefix and looking it up among 314 * the prefixes currently declared. The return value will be the 315 * array supplied by the caller, filled in as follows:</p> 316 * 317 * <dl> 318 * <dt>parts[0]</dt> 319 * <dd>The Namespace URI, or an empty string if none is 320 * in use.</dd> 321 * <dt>parts[1]</dt> 322 * <dd>The local name (without prefix).</dd> 323 * <dt>parts[2]</dt> 324 * <dd>The original raw name.</dd> 325 * </dl> 326 * 327 * <p>All of the strings in the array will be internalized. If 328 * the raw name has a prefix that has not been declared, then 329 * the return value will be null.</p> 330 * 331 * <p>Note that attribute names are processed differently than 332 * element names: an unprefixed element name will receive the 333 * default Namespace (if any), while an unprefixed attribute name 334 * will not.</p> 335 * 336 * @param qName The XML qualified name to be processed. 337 * @param parts An array supplied by the caller, capable of 338 * holding at least three members. 339 * @param isAttribute A flag indicating whether this is an 340 * attribute name (true) or an element name (false). 341 * @return The supplied array holding three internalized strings 342 * representing the Namespace URI (or empty string), the 343 * local name, and the XML qualified name; or null if there 344 * is an undeclared prefix. 345 * @see #declarePrefix 346 * @see java.lang.String#intern */ 347 public String [] processName (String qName, String parts[], 348 boolean isAttribute) 349 { 350 String myParts[] = currentContext.processName(qName, isAttribute); 351 if (myParts == null) { 352 return null; 353 } else { 354 parts[0] = myParts[0]; 355 parts[1] = myParts[1]; 356 parts[2] = myParts[2]; 357 return parts; 358 } 359 } 360 361 362 /** 363 * Look up a prefix and get the currently-mapped Namespace URI. 364 * 365 * <p>This method looks up the prefix in the current context. 366 * Use the empty string ("") for the default Namespace.</p> 367 * 368 * @param prefix The prefix to look up. 369 * @return The associated Namespace URI, or null if the prefix 370 * is undeclared in this context. 371 * @see #getPrefix 372 * @see #getPrefixes 373 */ 374 public String getURI (String prefix) 375 { 376 return currentContext.getURI(prefix); 377 } 378 379 380 /** 381 * Return an enumeration of all prefixes whose declarations are 382 * active in the current context. 383 * This includes declarations from parent contexts that have 384 * not been overridden. 385 * 386 * <p><strong>Note:</strong> if there is a default prefix, it will not be 387 * returned in this enumeration; check for the default prefix 388 * using the {@link #getURI getURI} with an argument of "".</p> 389 * 390 * @return An enumeration of prefixes (never empty). 391 * @see #getDeclaredPrefixes 392 * @see #getURI 393 */ 394 public Enumeration getPrefixes () 395 { 396 return currentContext.getPrefixes(); 397 } 398 399 400 /** 401 * Return one of the prefixes mapped to a Namespace URI. 402 * 403 * <p>If more than one prefix is currently mapped to the same 404 * URI, this method will make an arbitrary selection; if you 405 * want all of the prefixes, use the {@link #getPrefixes} 406 * method instead.</p> 407 * 408 * <p><strong>Note:</strong> this will never return the empty (default) prefix; 409 * to check for a default prefix, use the {@link #getURI getURI} 410 * method with an argument of "".</p> 411 * 412 * @param uri the namespace URI 413 * @return one of the prefixes currently mapped to the URI supplied, 414 * or null if none is mapped or if the URI is assigned to 415 * the default namespace 416 * @see #getPrefixes(java.lang.String) 417 * @see #getURI 418 */ 419 public String getPrefix (String uri) 420 { 421 return currentContext.getPrefix(uri); 422 } 423 424 425 /** 426 * Return an enumeration of all prefixes for a given URI whose 427 * declarations are active in the current context. 428 * This includes declarations from parent contexts that have 429 * not been overridden. 430 * 431 * <p>This method returns prefixes mapped to a specific Namespace 432 * URI. The xml: prefix will be included. If you want only one 433 * prefix that's mapped to the Namespace URI, and you don't care 434 * which one you get, use the {@link #getPrefix getPrefix} 435 * method instead.</p> 436 * 437 * <p><strong>Note:</strong> the empty (default) prefix is <em>never</em> included 438 * in this enumeration; to check for the presence of a default 439 * Namespace, use the {@link #getURI getURI} method with an 440 * argument of "".</p> 441 * 442 * @param uri The Namespace URI. 443 * @return An enumeration of prefixes (never empty). 444 * @see #getPrefix 445 * @see #getDeclaredPrefixes 446 * @see #getURI 447 */ 448 public Enumeration getPrefixes(String uri) { 449 ArrayList<String> prefixes = new ArrayList<String>(); 450 Enumeration allPrefixes = getPrefixes(); 451 while (allPrefixes.hasMoreElements()) { 452 String prefix = (String) allPrefixes.nextElement(); 453 if (uri.equals(getURI(prefix))) { 454 prefixes.add(prefix); 455 } 456 } 457 return Collections.enumeration(prefixes); 458 } 459 460 461 /** 462 * Return an enumeration of all prefixes declared in this context. 463 * 464 * <p>The empty (default) prefix will be included in this 465 * enumeration; note that this behaviour differs from that of 466 * {@link #getPrefix} and {@link #getPrefixes}.</p> 467 * 468 * @return An enumeration of all prefixes declared in this 469 * context. 470 * @see #getPrefixes 471 * @see #getURI 472 */ 473 public Enumeration getDeclaredPrefixes () 474 { 475 return currentContext.getDeclaredPrefixes(); 476 } 477 478 /** 479 * Controls whether namespace declaration attributes are placed 480 * into the {@link #NSDECL NSDECL} namespace 481 * by {@link #processName processName()}. This may only be 482 * changed before any contexts have been pushed. 483 * 484 * @param value the namespace declaration attribute state. A value of true 485 * enables this feature, a value of false disables it. 486 * 487 * @since SAX 2.1alpha 488 * 489 * @exception IllegalStateException when attempting to set this 490 * after any context has been pushed. 491 */ 492 public void setNamespaceDeclUris (boolean value) 493 { 494 if (contextPos != 0) 495 throw new IllegalStateException (); 496 if (value == namespaceDeclUris) 497 return; 498 namespaceDeclUris = value; 499 if (value) 500 currentContext.declarePrefix ("xmlns", NSDECL); 501 else { 502 contexts[contextPos] = currentContext = new Context(); 503 currentContext.declarePrefix("xml", XMLNS); 504 } 505 } 506 507 /** 508 * Returns true if namespace declaration attributes are placed into 509 * a namespace. This behavior is not the default. 510 * 511 * @return true if namespace declaration attributes are enabled, false 512 * otherwise. 513 * @since SAX 2.1alpha 514 */ 515 public boolean isNamespaceDeclUris () 516 { return namespaceDeclUris; } 517 518 519 520 //////////////////////////////////////////////////////////////////// 522 // Internal state. 523 //////////////////////////////////////////////////////////////////// 524 525 private Context contexts[]; 526 private Context currentContext; 527 private int contextPos; 528 private boolean namespaceDeclUris; 529 530 531 //////////////////////////////////////////////////////////////////// 533 // Internal classes. 534 //////////////////////////////////////////////////////////////////// 535 536 /** 537 * Internal class for a single Namespace context. 538 * 539 * <p>This module caches and reuses Namespace contexts, 540 * so the number allocated 541 * will be equal to the element depth of the document, not to the total 542 * number of elements (i.e. 5-10 rather than tens of thousands). 543 * Also, data structures used to represent contexts are shared when 544 * possible (child contexts without declarations) to further reduce 545 * the amount of memory that's consumed. 546 * </p> 547 */ 548 final class Context { 549 550 /** 551 * Create the root-level Namespace context. 552 */ 553 Context () 554 { 555 copyTables(); 556 } 557 558 559 /** 560 * (Re)set the parent of this Namespace context. 561 * The context must either have been freshly constructed, 562 * or must have been cleared. 563 * 564 * @param context The parent Namespace context object. 565 */ 566 void setParent (Context parent) 567 { 568 this.parent = parent; 569 declarations = null; 570 prefixTable = parent.prefixTable; 571 uriTable = parent.uriTable; 572 elementNameTable = parent.elementNameTable; 573 attributeNameTable = parent.attributeNameTable; 574 defaultNS = parent.defaultNS; 575 declSeen = false; 576 declsOK = true; 577 } 578 579 /** 580 * Makes associated state become collectible, 581 * invalidating this context. 582 * {@link #setParent} must be called before 583 * this context may be used again. 584 */ 585 void clear () 586 { 587 parent = null; 588 prefixTable = null; 589 uriTable = null; 590 elementNameTable = null; 591 attributeNameTable = null; 592 defaultNS = null; 593 } 594 595 596 /** 597 * Declare a Namespace prefix for this context. 598 * 599 * @param prefix The prefix to declare. 600 * @param uri The associated Namespace URI. 601 * @see org.xml.sax.helpers.NamespaceSupport#declarePrefix 602 */ 603 void declarePrefix(String prefix, String uri) { 604 // Lazy processing... 605 if (!declsOK) { 606 throw new IllegalStateException ("can't declare any more prefixes in this context"); 607 } 608 if (!declSeen) { 609 copyTables(); 610 } 611 if (declarations == null) { 612 declarations = new ArrayList<String>(); 613 } 614 615 prefix = prefix.intern(); 616 uri = uri.intern(); 617 if ("".equals(prefix)) { 618 if ("".equals(uri)) { 619 defaultNS = null; 620 } else { 621 defaultNS = uri; 622 } 623 } else { 624 prefixTable.put(prefix, uri); 625 uriTable.put(uri, prefix); // may wipe out another prefix 626 } 627 declarations.add(prefix); 628 } 629 630 631 /** 632 * Process an XML qualified name in this context. 633 * 634 * @param qName The XML qualified name. 635 * @param isAttribute true if this is an attribute name. 636 * @return An array of three strings containing the 637 * URI part (or empty string), the local part, 638 * and the raw name, all internalized, or null 639 * if there is an undeclared prefix. 640 * @see org.xml.sax.helpers.NamespaceSupport#processName 641 */ 642 String [] processName (String qName, boolean isAttribute) 643 { 644 String name[]; 645 Hashtable table; 646 647 // detect errors in call sequence 648 declsOK = false; 649 650 // Select the appropriate table. 651 if (isAttribute) { 652 table = attributeNameTable; 653 } else { 654 table = elementNameTable; 655 } 656 657 // Start by looking in the cache, and 658 // return immediately if the name 659 // is already known in this content 660 name = (String[])table.get(qName); 661 if (name != null) { 662 return name; 663 } 664 665 // We haven't seen this name in this 666 // context before. Maybe in the parent 667 // context, but we can't assume prefix 668 // bindings are the same. 669 name = new String[3]; 670 name[2] = qName.intern(); 671 int index = qName.indexOf(':'); 672 673 674 // No prefix. 675 if (index == -1) { 676 if (isAttribute) { 677 if (qName == "xmlns" && namespaceDeclUris) 678 name[0] = NSDECL; 679 else 680 name[0] = ""; 681 } else if (defaultNS == null) { 682 name[0] = ""; 683 } else { 684 name[0] = defaultNS; 685 } 686 name[1] = name[2]; 687 } 688 689 // Prefix 690 else { 691 String prefix = qName.substring(0, index); 692 String local = qName.substring(index+1); 693 String uri; 694 if ("".equals(prefix)) { 695 uri = defaultNS; 696 } else { 697 uri = (String)prefixTable.get(prefix); 698 } 699 if (uri == null 700 || (!isAttribute && "xmlns".equals (prefix))) { 701 return null; 702 } 703 name[0] = uri; 704 name[1] = local.intern(); 705 } 706 707 // Save in the cache for future use. 708 // (Could be shared with parent context...) 709 table.put(name[2], name); 710 return name; 711 } 712 713 714 /** 715 * Look up the URI associated with a prefix in this context. 716 * 717 * @param prefix The prefix to look up. 718 * @return The associated Namespace URI, or null if none is 719 * declared. 720 * @see org.xml.sax.helpers.NamespaceSupport#getURI 721 */ 722 String getURI (String prefix) 723 { 724 if ("".equals(prefix)) { 725 return defaultNS; 726 } else if (prefixTable == null) { 727 return null; 728 } else { 729 return (String)prefixTable.get(prefix); 730 } 731 } 732 733 734 /** 735 * Look up one of the prefixes associated with a URI in this context. 736 * 737 * <p>Since many prefixes may be mapped to the same URI, 738 * the return value may be unreliable.</p> 739 * 740 * @param uri The URI to look up. 741 * @return The associated prefix, or null if none is declared. 742 * @see org.xml.sax.helpers.NamespaceSupport#getPrefix 743 */ 744 String getPrefix (String uri) 745 { 746 if (uriTable == null) { 747 return null; 748 } else { 749 return (String)uriTable.get(uri); 750 } 751 } 752 753 754 /** 755 * Return an enumeration of prefixes declared in this context. 756 * 757 * @return An enumeration of prefixes (possibly empty). 758 * @see org.xml.sax.helpers.NamespaceSupport#getDeclaredPrefixes 759 */ 760 Enumeration getDeclaredPrefixes() { 761 return (declarations == null) ? EMPTY_ENUMERATION : Collections.enumeration(declarations); 762 } 763 764 765 /** 766 * Return an enumeration of all prefixes currently in force. 767 * 768 * <p>The default prefix, if in force, is <em>not</em> 769 * returned, and will have to be checked for separately.</p> 770 * 771 * @return An enumeration of prefixes (never empty). 772 * @see org.xml.sax.helpers.NamespaceSupport#getPrefixes 773 */ 774 Enumeration getPrefixes () 775 { 776 if (prefixTable == null) { 777 return EMPTY_ENUMERATION; 778 } else { 779 return prefixTable.keys(); 780 } 781 } 782 783 784 785 //////////////////////////////////////////////////////////////// 787 // Internal methods. 788 //////////////////////////////////////////////////////////////// 789 790 791 /** 792 * Copy on write for the internal tables in this context. 793 * 794 * <p>This class is optimized for the normal case where most 795 * elements do not contain Namespace declarations.</p> 796 */ 797 private void copyTables () 798 { 799 if (prefixTable != null) { 800 prefixTable = (Hashtable)prefixTable.clone(); 801 } else { 802 prefixTable = new Hashtable(); 803 } 804 if (uriTable != null) { 805 uriTable = (Hashtable)uriTable.clone(); 806 } else { 807 uriTable = new Hashtable(); 808 } 809 elementNameTable = new Hashtable(); 810 attributeNameTable = new Hashtable(); 811 declSeen = true; 812 } 813 814 815 816 //////////////////////////////////////////////////////////////// 818 // Protected state. 819 //////////////////////////////////////////////////////////////// 820 821 Hashtable prefixTable; 822 Hashtable uriTable; 823 Hashtable elementNameTable; 824 Hashtable attributeNameTable; 825 String defaultNS = null; 826 boolean declsOK = true; 827 828 829 830 //////////////////////////////////////////////////////////////// 832 // Internal state. 833 //////////////////////////////////////////////////////////////// 834 835 private ArrayList<String> declarations = null; 836 private boolean declSeen = false; 837 private Context parent = null; 838 } 839 } 840 841 // end of NamespaceSupport.java 842