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 1.14 2004/12/11 15:41:10 dog Exp $ 6 7 package org.xml.sax.helpers; 8 9 import java.util.EmptyStackException; 10 import java.util.Enumeration; 11 import java.util.Hashtable; 12 import java.util.Vector; 13 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 //////////////////////////////////////////////////////////////////// 77 // Constants. 78 //////////////////////////////////////////////////////////////////// 79 80 81 /** 82 * The XML Namespace URI as a constant. 83 * The value is <code>http://www.w3.org/XML/1998/namespace</code> 84 * as defined in the "Namespaces in XML" * recommendation. 85 * 86 * <p>This is the Namespace URI that is automatically mapped 87 * to the "xml" prefix.</p> 88 */ 89 public final static String XMLNS = 90 "http://www.w3.org/XML/1998/namespace"; 91 92 93 /** 94 * The namespace declaration URI as a constant. 95 * The value is <code>http://www.w3.org/xmlns/2000/</code>, as defined 96 * in a backwards-incompatible erratum to the "Namespaces in XML" 97 * recommendation. Because that erratum postdated SAX2, SAX2 defaults 98 * to the original recommendation, and does not normally use this URI. 99 * 100 * 101 * <p>This is the Namespace URI that is optionally applied to 102 * <em>xmlns</em> and <em>xmlns:*</em> attributes, which are used to 103 * declare namespaces. </p> 104 * 105 * @since SAX 2.1alpha 106 * @see #setNamespaceDeclUris 107 * @see #isNamespaceDeclUris 108 */ 109 public final static String NSDECL = 110 "http://www.w3.org/xmlns/2000/"; 111 112 113 /** 114 * An empty enumeration. 115 */ 116 private final static Enumeration EMPTY_ENUMERATION = 117 new Vector().elements(); 118 119 120 //////////////////////////////////////////////////////////////////// 121 // Constructor. 122 //////////////////////////////////////////////////////////////////// 123 124 125 /** 126 * Create a new Namespace support object. 127 */ NamespaceSupport()128 public NamespaceSupport () 129 { 130 reset(); 131 } 132 133 134 135 //////////////////////////////////////////////////////////////////// 136 // Context management. 137 //////////////////////////////////////////////////////////////////// 138 139 140 /** 141 * Reset this Namespace support object for reuse. 142 * 143 * <p>It is necessary to invoke this method before reusing the 144 * Namespace support object for a new session. If namespace 145 * declaration URIs are to be supported, that flag must also 146 * be set to a non-default value. 147 * </p> 148 * 149 * @see #setNamespaceDeclUris 150 */ reset()151 public void reset () 152 { 153 contexts = new Context[32]; 154 namespaceDeclUris = false; 155 contextPos = 0; 156 contexts[contextPos] = currentContext = new Context(); 157 currentContext.declarePrefix("xml", XMLNS); 158 } 159 160 161 /** 162 * Start a new Namespace context. 163 * The new context will automatically inherit 164 * the declarations of its parent context, but it will also keep 165 * track of which declarations were made within this context. 166 * 167 * <p>Event callback code should start a new context once per element. 168 * This means being ready to call this in either of two places. 169 * For elements that don't include namespace declarations, the 170 * <em>ContentHandler.startElement()</em> callback is the right place. 171 * For elements with such a declaration, it'd done in the first 172 * <em>ContentHandler.startPrefixMapping()</em> callback. 173 * A boolean flag can be used to 174 * track whether a context has been started yet. When either of 175 * those methods is called, it checks the flag to see if a new context 176 * needs to be started. If so, it starts the context and sets the 177 * flag. After <em>ContentHandler.startElement()</em> 178 * does that, it always clears the flag. 179 * 180 * <p>Normally, SAX drivers would push a new context at the beginning 181 * of each XML element. Then they perform a first pass over the 182 * attributes to process all namespace declarations, making 183 * <em>ContentHandler.startPrefixMapping()</em> callbacks. 184 * Then a second pass is made, to determine the namespace-qualified 185 * names for all attributes and for the element name. 186 * Finally all the information for the 187 * <em>ContentHandler.startElement()</em> callback is available, 188 * so it can then be made. 189 * 190 * <p>The Namespace support object always starts with a base context 191 * already in force: in this context, only the "xml" prefix is 192 * declared.</p> 193 * 194 * @see org.xml.sax.ContentHandler 195 * @see #popContext 196 */ pushContext()197 public void pushContext () 198 { 199 int max = contexts.length; 200 201 contexts [contextPos].declsOK = false; 202 contextPos++; 203 204 // Extend the array if necessary 205 if (contextPos >= max) { 206 Context newContexts[] = new Context[max*2]; 207 System.arraycopy(contexts, 0, newContexts, 0, max); 208 max *= 2; 209 contexts = newContexts; 210 } 211 212 // Allocate the context if necessary. 213 currentContext = contexts[contextPos]; 214 if (currentContext == null) { 215 contexts[contextPos] = currentContext = new Context(); 216 } 217 218 // Set the parent, if any. 219 if (contextPos > 0) { 220 currentContext.setParent(contexts[contextPos - 1]); 221 } 222 } 223 224 225 /** 226 * Revert to the previous Namespace context. 227 * 228 * <p>Normally, you should pop the context at the end of each 229 * XML element. After popping the context, all Namespace prefix 230 * mappings that were previously in force are restored.</p> 231 * 232 * <p>You must not attempt to declare additional Namespace 233 * prefixes after popping a context, unless you push another 234 * context first.</p> 235 * 236 * @see #pushContext 237 */ popContext()238 public void popContext () 239 { 240 contexts[contextPos].clear(); 241 contextPos--; 242 if (contextPos < 0) { 243 throw new EmptyStackException(); 244 } 245 currentContext = contexts[contextPos]; 246 } 247 248 249 250 //////////////////////////////////////////////////////////////////// 251 // Operations within a context. 252 //////////////////////////////////////////////////////////////////// 253 254 255 /** 256 * Declare a Namespace prefix. All prefixes must be declared 257 * before they are referenced. For example, a SAX driver (parser) 258 * would scan an element's attributes 259 * in two passes: first for namespace declarations, 260 * then a second pass using {@link #processName processName()} to 261 * interpret prefixes against (potentially redefined) prefixes. 262 * 263 * <p>This method declares a prefix in the current Namespace 264 * context; the prefix will remain in force until this context 265 * is popped, unless it is shadowed in a descendant context.</p> 266 * 267 * <p>To declare the default element Namespace, use the empty string as 268 * the prefix.</p> 269 * 270 * <p>Note that you must <em>not</em> declare a prefix after 271 * you've pushed and popped another Namespace context, or 272 * treated the declarations phase as complete by processing 273 * a prefixed name.</p> 274 * 275 * <p>Note that there is an asymmetry in this library: {@link 276 * #getPrefix getPrefix} will not return the "" prefix, 277 * even if you have declared a default element namespace. 278 * To check for a default namespace, 279 * you have to look it up explicitly using {@link #getURI getURI}. 280 * This asymmetry exists to make it easier to look up prefixes 281 * for attribute names, where the default prefix is not allowed.</p> 282 * 283 * @param prefix The prefix to declare, or the empty string to 284 * indicate the default element namespace. This may never have 285 * the value "xml" or "xmlns". 286 * @param uri The Namespace URI to associate with the prefix. 287 * @return true if the prefix was legal, false otherwise 288 * 289 * @see #processName 290 * @see #getURI 291 * @see #getPrefix 292 */ declarePrefix(String prefix, String uri)293 public boolean declarePrefix (String prefix, String uri) 294 { 295 if (prefix.equals("xml") || prefix.equals("xmlns")) { 296 return false; 297 } else { 298 currentContext.declarePrefix(prefix, uri); 299 return true; 300 } 301 } 302 303 304 /** 305 * Process a raw XML qualified name, after all declarations in the 306 * current context have been handled by {@link #declarePrefix 307 * declarePrefix()}. 308 * 309 * <p>This method processes a raw XML qualified name in the 310 * current context by removing the prefix and looking it up among 311 * the prefixes currently declared. The return value will be the 312 * array supplied by the caller, filled in as follows:</p> 313 * 314 * <dl> 315 * <dt>parts[0]</dt> 316 * <dd>The Namespace URI, or an empty string if none is 317 * in use.</dd> 318 * <dt>parts[1]</dt> 319 * <dd>The local name (without prefix).</dd> 320 * <dt>parts[2]</dt> 321 * <dd>The original raw name.</dd> 322 * </dl> 323 * 324 * <p>All of the strings in the array will be internalized. If 325 * the raw name has a prefix that has not been declared, then 326 * the return value will be null.</p> 327 * 328 * <p>Note that attribute names are processed differently than 329 * element names: an unprefixed element name will receive the 330 * default Namespace (if any), while an unprefixed attribute name 331 * will not.</p> 332 * 333 * @param qName The XML qualified name to be processed. 334 * @param parts An array supplied by the caller, capable of 335 * holding at least three members. 336 * @param isAttribute A flag indicating whether this is an 337 * attribute name (true) or an element name (false). 338 * @return The supplied array holding three internalized strings 339 * representing the Namespace URI (or empty string), the 340 * local name, and the XML qualified name; or null if there 341 * is an undeclared prefix. 342 * @see #declarePrefix 343 * @see java.lang.String#intern */ processName(String qName, String parts[], boolean isAttribute)344 public String [] processName (String qName, String parts[], 345 boolean isAttribute) 346 { 347 String myParts[] = currentContext.processName(qName, isAttribute); 348 if (myParts == null) { 349 return null; 350 } else { 351 parts[0] = myParts[0]; 352 parts[1] = myParts[1]; 353 parts[2] = myParts[2]; 354 return parts; 355 } 356 } 357 358 359 /** 360 * Look up a prefix and get the currently-mapped Namespace URI. 361 * 362 * <p>This method looks up the prefix in the current context. 363 * Use the empty string ("") for the default Namespace.</p> 364 * 365 * @param prefix The prefix to look up. 366 * @return The associated Namespace URI, or null if the prefix 367 * is undeclared in this context. 368 * @see #getPrefix 369 * @see #getPrefixes 370 */ getURI(String prefix)371 public String getURI (String prefix) 372 { 373 return currentContext.getURI(prefix); 374 } 375 376 377 /** 378 * Return an enumeration of all prefixes whose declarations are 379 * active in the current context. 380 * This includes declarations from parent contexts that have 381 * not been overridden. 382 * 383 * <p><strong>Note:</strong> if there is a default prefix, it will not be 384 * returned in this enumeration; check for the default prefix 385 * using the {@link #getURI getURI} with an argument of "".</p> 386 * 387 * @return An enumeration of prefixes (never empty). 388 * @see #getDeclaredPrefixes 389 * @see #getURI 390 */ getPrefixes()391 public Enumeration getPrefixes () 392 { 393 return currentContext.getPrefixes(); 394 } 395 396 397 /** 398 * Return one of the prefixes mapped to a Namespace URI. 399 * 400 * <p>If more than one prefix is currently mapped to the same 401 * URI, this method will make an arbitrary selection; if you 402 * want all of the prefixes, use the {@link #getPrefixes} 403 * method instead.</p> 404 * 405 * <p><strong>Note:</strong> this will never return the empty (default) prefix; 406 * to check for a default prefix, use the {@link #getURI getURI} 407 * method with an argument of "".</p> 408 * 409 * @param uri the namespace URI 410 * @return one of the prefixes currently mapped to the URI supplied, 411 * or null if none is mapped or if the URI is assigned to 412 * the default namespace 413 * @see #getPrefixes(java.lang.String) 414 * @see #getURI 415 */ getPrefix(String uri)416 public String getPrefix (String uri) 417 { 418 return currentContext.getPrefix(uri); 419 } 420 421 422 /** 423 * Return an enumeration of all prefixes for a given URI whose 424 * declarations are active in the current context. 425 * This includes declarations from parent contexts that have 426 * not been overridden. 427 * 428 * <p>This method returns prefixes mapped to a specific Namespace 429 * URI. The xml: prefix will be included. If you want only one 430 * prefix that's mapped to the Namespace URI, and you don't care 431 * which one you get, use the {@link #getPrefix getPrefix} 432 * method instead.</p> 433 * 434 * <p><strong>Note:</strong> the empty (default) prefix is <em>never</em> included 435 * in this enumeration; to check for the presence of a default 436 * Namespace, use the {@link #getURI getURI} method with an 437 * argument of "".</p> 438 * 439 * @param uri The Namespace URI. 440 * @return An enumeration of prefixes (never empty). 441 * @see #getPrefix 442 * @see #getDeclaredPrefixes 443 * @see #getURI 444 */ getPrefixes(String uri)445 public Enumeration getPrefixes (String uri) 446 { 447 Vector prefixes = new Vector(); 448 Enumeration allPrefixes = getPrefixes(); 449 while (allPrefixes.hasMoreElements()) { 450 String prefix = (String)allPrefixes.nextElement(); 451 if (uri.equals(getURI(prefix))) { 452 prefixes.addElement(prefix); 453 } 454 } 455 return prefixes.elements(); 456 } 457 458 459 /** 460 * Return an enumeration of all prefixes declared in this context. 461 * 462 * <p>The empty (default) prefix will be included in this 463 * enumeration; note that this behaviour differs from that of 464 * {@link #getPrefix} and {@link #getPrefixes}.</p> 465 * 466 * @return An enumeration of all prefixes declared in this 467 * context. 468 * @see #getPrefixes 469 * @see #getURI 470 */ getDeclaredPrefixes()471 public Enumeration getDeclaredPrefixes () 472 { 473 return currentContext.getDeclaredPrefixes(); 474 } 475 476 /** 477 * Controls whether namespace declaration attributes are placed 478 * into the {@link #NSDECL NSDECL} namespace 479 * by {@link #processName processName()}. This may only be 480 * changed before any contexts have been pushed. 481 * 482 * @since SAX 2.1alpha 483 * 484 * @exception IllegalStateException when attempting to set this 485 * after any context has been pushed. 486 */ setNamespaceDeclUris(boolean value)487 public void setNamespaceDeclUris (boolean value) 488 { 489 if (contextPos != 0) 490 throw new IllegalStateException (); 491 if (value == namespaceDeclUris) 492 return; 493 namespaceDeclUris = value; 494 if (value) 495 currentContext.declarePrefix ("xmlns", NSDECL); 496 else { 497 contexts[contextPos] = currentContext = new Context(); 498 currentContext.declarePrefix("xml", XMLNS); 499 } 500 } 501 502 /** 503 * Returns true if namespace declaration attributes are placed into 504 * a namespace. This behavior is not the default. 505 * 506 * @since SAX 2.1alpha 507 */ isNamespaceDeclUris()508 public boolean isNamespaceDeclUris () 509 { return namespaceDeclUris; } 510 511 512 513 //////////////////////////////////////////////////////////////////// 514 // Internal state. 515 //////////////////////////////////////////////////////////////////// 516 517 private Context contexts[]; 518 private Context currentContext; 519 private int contextPos; 520 private boolean namespaceDeclUris; 521 522 523 //////////////////////////////////////////////////////////////////// 524 // Internal classes. 525 //////////////////////////////////////////////////////////////////// 526 527 /** 528 * Internal class for a single Namespace context. 529 * 530 * <p>This module caches and reuses Namespace contexts, 531 * so the number allocated 532 * will be equal to the element depth of the document, not to the total 533 * number of elements (i.e. 5-10 rather than tens of thousands). 534 * Also, data structures used to represent contexts are shared when 535 * possible (child contexts without declarations) to further reduce 536 * the amount of memory that's consumed. 537 * </p> 538 */ 539 final class Context { 540 541 /** 542 * Create the root-level Namespace context. 543 */ Context()544 Context () 545 { 546 copyTables(); 547 } 548 549 550 /** 551 * (Re)set the parent of this Namespace context. 552 * The context must either have been freshly constructed, 553 * or must have been cleared. 554 * 555 * @param context The parent Namespace context object. 556 */ setParent(Context parent)557 void setParent (Context parent) 558 { 559 this.parent = parent; 560 declarations = null; 561 prefixTable = parent.prefixTable; 562 uriTable = parent.uriTable; 563 elementNameTable = parent.elementNameTable; 564 attributeNameTable = parent.attributeNameTable; 565 defaultNS = parent.defaultNS; 566 declSeen = false; 567 declsOK = true; 568 } 569 570 /** 571 * Makes associated state become collectible, 572 * invalidating this context. 573 * {@link #setParent} must be called before 574 * this context may be used again. 575 */ clear()576 void clear () 577 { 578 parent = null; 579 prefixTable = null; 580 uriTable = null; 581 elementNameTable = null; 582 attributeNameTable = null; 583 defaultNS = null; 584 } 585 586 587 /** 588 * Declare a Namespace prefix for this context. 589 * 590 * @param prefix The prefix to declare. 591 * @param uri The associated Namespace URI. 592 * @see org.xml.sax.helpers.NamespaceSupport#declarePrefix 593 */ declarePrefix(String prefix, String uri)594 void declarePrefix (String prefix, String uri) 595 { 596 // Lazy processing... 597 if (!declsOK) 598 throw new IllegalStateException ( 599 "can't declare any more prefixes in this context"); 600 if (!declSeen) { 601 copyTables(); 602 } 603 if (declarations == null) { 604 declarations = new Vector(); 605 } 606 607 prefix = prefix.intern(); 608 uri = uri.intern(); 609 if ("".equals(prefix)) { 610 if ("".equals(uri)) { 611 defaultNS = null; 612 } else { 613 defaultNS = uri; 614 } 615 } else { 616 prefixTable.put(prefix, uri); 617 uriTable.put(uri, prefix); // may wipe out another prefix 618 } 619 declarations.addElement(prefix); 620 } 621 622 623 /** 624 * Process an XML qualified name in this context. 625 * 626 * @param qName The XML qualified name. 627 * @param isAttribute true if this is an attribute name. 628 * @return An array of three strings containing the 629 * URI part (or empty string), the local part, 630 * and the raw name, all internalized, or null 631 * if there is an undeclared prefix. 632 * @see org.xml.sax.helpers.NamespaceSupport#processName 633 */ processName(String qName, boolean isAttribute)634 String [] processName (String qName, boolean isAttribute) 635 { 636 String name[]; 637 Hashtable table; 638 639 // detect errors in call sequence 640 declsOK = false; 641 642 // Select the appropriate table. 643 if (isAttribute) { 644 table = attributeNameTable; 645 } else { 646 table = elementNameTable; 647 } 648 649 // Start by looking in the cache, and 650 // return immediately if the name 651 // is already known in this content 652 name = (String[])table.get(qName); 653 if (name != null) { 654 return name; 655 } 656 657 // We haven't seen this name in this 658 // context before. Maybe in the parent 659 // context, but we can't assume prefix 660 // bindings are the same. 661 name = new String[3]; 662 name[2] = qName.intern(); 663 int index = qName.indexOf(':'); 664 665 666 // No prefix. 667 if (index == -1) { 668 if (isAttribute) { 669 if (qName == "xmlns" && namespaceDeclUris) 670 name[0] = NSDECL; 671 else 672 name[0] = ""; 673 } else if (defaultNS == null) { 674 name[0] = ""; 675 } else { 676 name[0] = defaultNS; 677 } 678 name[1] = name[2]; 679 } 680 681 // Prefix 682 else { 683 String prefix = qName.substring(0, index); 684 String local = qName.substring(index+1); 685 String uri; 686 if ("".equals(prefix)) { 687 uri = defaultNS; 688 } else { 689 uri = (String)prefixTable.get(prefix); 690 } 691 if (uri == null 692 || (!isAttribute && "xmlns".equals (prefix))) { 693 return null; 694 } 695 name[0] = uri; 696 name[1] = local.intern(); 697 } 698 699 // Save in the cache for future use. 700 // (Could be shared with parent context...) 701 table.put(name[2], name); 702 return name; 703 } 704 705 706 /** 707 * Look up the URI associated with a prefix in this context. 708 * 709 * @param prefix The prefix to look up. 710 * @return The associated Namespace URI, or null if none is 711 * declared. 712 * @see org.xml.sax.helpers.NamespaceSupport#getURI 713 */ getURI(String prefix)714 String getURI (String prefix) 715 { 716 if ("".equals(prefix)) { 717 return defaultNS; 718 } else if (prefixTable == null) { 719 return null; 720 } else { 721 return (String)prefixTable.get(prefix); 722 } 723 } 724 725 726 /** 727 * Look up one of the prefixes associated with a URI in this context. 728 * 729 * <p>Since many prefixes may be mapped to the same URI, 730 * the return value may be unreliable.</p> 731 * 732 * @param uri The URI to look up. 733 * @return The associated prefix, or null if none is declared. 734 * @see org.xml.sax.helpers.NamespaceSupport#getPrefix 735 */ getPrefix(String uri)736 String getPrefix (String uri) 737 { 738 if (uriTable == null) { 739 return null; 740 } else { 741 return (String)uriTable.get(uri); 742 } 743 } 744 745 746 /** 747 * Return an enumeration of prefixes declared in this context. 748 * 749 * @return An enumeration of prefixes (possibly empty). 750 * @see org.xml.sax.helpers.NamespaceSupport#getDeclaredPrefixes 751 */ getDeclaredPrefixes()752 Enumeration getDeclaredPrefixes () 753 { 754 if (declarations == null) { 755 return EMPTY_ENUMERATION; 756 } else { 757 return declarations.elements(); 758 } 759 } 760 761 762 /** 763 * Return an enumeration of all prefixes currently in force. 764 * 765 * <p>The default prefix, if in force, is <em>not</em> 766 * returned, and will have to be checked for separately.</p> 767 * 768 * @return An enumeration of prefixes (never empty). 769 * @see org.xml.sax.helpers.NamespaceSupport#getPrefixes 770 */ getPrefixes()771 Enumeration getPrefixes () 772 { 773 if (prefixTable == null) { 774 return EMPTY_ENUMERATION; 775 } else { 776 return prefixTable.keys(); 777 } 778 } 779 780 781 782 //////////////////////////////////////////////////////////////// 783 // Internal methods. 784 //////////////////////////////////////////////////////////////// 785 786 787 /** 788 * Copy on write for the internal tables in this context. 789 * 790 * <p>This class is optimized for the normal case where most 791 * elements do not contain Namespace declarations.</p> 792 */ copyTables()793 private void copyTables () 794 { 795 if (prefixTable != null) { 796 prefixTable = (Hashtable)prefixTable.clone(); 797 } else { 798 prefixTable = new Hashtable(); 799 } 800 if (uriTable != null) { 801 uriTable = (Hashtable)uriTable.clone(); 802 } else { 803 uriTable = new Hashtable(); 804 } 805 elementNameTable = new Hashtable(); 806 attributeNameTable = new Hashtable(); 807 declSeen = true; 808 } 809 810 811 812 //////////////////////////////////////////////////////////////// 813 // Protected state. 814 //////////////////////////////////////////////////////////////// 815 816 Hashtable prefixTable; 817 Hashtable uriTable; 818 Hashtable elementNameTable; 819 Hashtable attributeNameTable; 820 String defaultNS = null; 821 boolean declsOK = true; 822 823 824 825 //////////////////////////////////////////////////////////////// 826 // Internal state. 827 //////////////////////////////////////////////////////////////// 828 829 private Vector declarations = null; 830 private boolean declSeen = false; 831 private Context parent = null; 832 } 833 } 834 835 // end of NamespaceSupport.java 836