libjava/org/xml/sax/helpers/NamespaceSupport.java

   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
   6 // $Id: NamespaceSupport.java,v 1.6.2.5 2002/01/29 21:34:14 dbrownell Exp $
   7
   8 package org.xml.sax.helpers;
   9
  10 import java.util.EmptyStackException;
  11 import java.util.Enumeration;
  12 import java.util.Hashtable;
  13 import java.util.Vector;
  14
  15
  16 /**
  17  * Encapsulate Namespace logic for use by applications using SAX,
  18  * or internally by SAX drivers.
  19  *
  20  * <blockquote>
  21  * <em>This module, both source code and documentation, is in the
  22  * Public Domain, and comes with <strong>NO WARRANTY</strong>.</em>
  23  * See <a href='http://www.saxproject.org'>http://www.saxproject.org</a>
  24  * for further information.
  25  * </blockquote>
  26  *
  27  * <p>This class encapsulates the logic of Namespace processing:
  28  * it tracks the declarations currently in force for each context
  29  * and automatically processes qualified XML 1.0 names into their
  30  * Namespace parts; it can also be used in reverse for generating
  31  * XML 1.0 from Namespaces.</p>
  32  *
  33  * <p>Namespace support objects are reusable, but the reset method
  34  * must be invoked between each session.</p>
  35  *
  36  * <p>Here is a simple session:</p>
  37  *
  38  * <pre>
  39  * String parts[] = new String[3];
  40  * NamespaceSupport support = new NamespaceSupport();
  41  *
  42  * support.pushContext();
  43  * support.declarePrefix("", "http://www.w3.org/1999/xhtml");
  44  * support.declarePrefix("dc", "http://www.purl.org/dc#");
  45  *
  46  * parts = support.processName("p", parts, false);
  47  * System.out.println("Namespace URI: " + parts[0]);
  48  * System.out.println("Local name: " + parts[1]);
  49  * System.out.println("Raw name: " + parts[2]);
  50  *
  51  * parts = support.processName("dc:title", parts, false);
  52  * System.out.println("Namespace URI: " + parts[0]);
  53  * System.out.println("Local name: " + parts[1]);
  54  * System.out.println("Raw name: " + parts[2]);
  55  *
  56  * support.popContext();
  57  * </pre>
  58  *
  59  * <p>Note that this class is optimized for the use case where most
  60  * elements do not contain Namespace declarations: if the same
  61  * prefix/URI mapping is repeated for each context (for example), this
  62  * class will be somewhat less efficient.</p>
  63  *
  64  * <p>Although SAX drivers (parsers) may choose to use this class to
  65  * implement namespace handling, they are not required to do so.
  66  * Applications must track namespace information themselves if they
  67  * want to use namespace information.
  68  *
  69  * @since SAX 2.0
  70  * @author David Megginson
  71  * @version 2.0.1 (sax2r2)
  72  */
  73 public class NamespaceSupport
  74 {
  75
  76 \f
  77     ////////////////////////////////////////////////////////////////////
  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 XML Namespaces specification.
  86      *
  87      * <p>This is the Namespace URI that is automatically mapped
  88      * to the "xml" prefix.</p>
  89      */
  90     public final static String XMLNS =
  91         "http://www.w3.org/XML/1998/namespace";
  92
  93
  94     /**
  95      * An empty enumeration.
  96      */
  97     private final static Enumeration EMPTY_ENUMERATION =
  98         new Vector().elements();
  99
 100 \f
 101     ////////////////////////////////////////////////////////////////////
 102     // Constructor.
 103     ////////////////////////////////////////////////////////////////////
 104
 105
 106     /**
 107      * Create a new Namespace support object.
 108      */
 109     public NamespaceSupport ()
 110     {
 111         reset();
 112     }
 113
 114
 115 \f
 116     ////////////////////////////////////////////////////////////////////
 117     // Context management.
 118     ////////////////////////////////////////////////////////////////////
 119
 120
 121     /**
 122      * Reset this Namespace support object for reuse.
 123      *
 124      * <p>It is necessary to invoke this method before reusing the
 125      * Namespace support object for a new session.</p>
 126      */
 127     public void reset ()
 128     {
 129         contexts = new Context[32];
 130         contextPos = 0;
 131         contexts[contextPos] = currentContext = new Context();
 132         currentContext.declarePrefix("xml", XMLNS);
 133     }
 134
 135
 136     /**
 137      * Start a new Namespace context.
 138      * The new context will automatically inherit
 139      * the declarations of its parent context, but it will also keep
 140      * track of which declarations were made within this context.
 141      *
 142      * <p>Event callback code should start a new context once per element.
 143      * This means being ready to call this in either of two places.
 144      * For elements that don't include namespace declarations, the
 145      * <em>ContentHandler.startElement()</em> callback is the right place.
 146      * For elements with such a declaration, it'd done in the first
 147      * <em>ContentHandler.startPrefixMapping()</em> callback.
 148      * A boolean flag can be used to
 149      * track whether a context has been started yet.  When either of
 150      * those methods is called, it checks the flag to see if a new context
 151      * needs to be started.  If so, it starts the context and sets the
 152      * flag.  After <em>ContentHandler.startElement()</em>
 153      * does that, it always clears the flag.
 154      *
 155      * <p>Normally, SAX drivers would push a new context at the beginning
 156      * of each XML element.  Then they perform a first pass over the
 157      * attributes to process all namespace declarations, making
 158      * <em>ContentHandler.startPrefixMapping()</em> callbacks.
 159      * Then a second pass is made, to determine the namespace-qualified
 160      * names for all attributes and for the element name.
 161      * Finally all the information for the
 162      * <em>ContentHandler.startElement()</em> callback is available,
 163      * so it can then be made.
 164      *
 165      * <p>The Namespace support object always starts with a base context
 166      * already in force: in this context, only the "xml" prefix is
 167      * declared.</p>
 168      *
 169      * @see org.xml.sax.ContentHandler
 170      * @see #popContext
 171      */
 172     public void pushContext ()
 173     {
 174         int max = contexts.length;
 175
 176         contexts [contextPos].declsOK = false;
 177         contextPos++;
 178
 179                                 // Extend the array if necessary
 180         if (contextPos >= max) {
 181             Context newContexts[] = new Context[max*2];
 182             System.arraycopy(contexts, 0, newContexts, 0, max);
 183             max *= 2;
 184             contexts = newContexts;
 185         }
 186
 187                                 // Allocate the context if necessary.
 188         currentContext = contexts[contextPos];
 189         if (currentContext == null) {
 190             contexts[contextPos] = currentContext = new Context();
 191         }
 192
 193                                 // Set the parent, if any.
 194         if (contextPos > 0) {
 195             currentContext.setParent(contexts[contextPos - 1]);
 196         }
 197     }
 198
 199
 200     /**
 201      * Revert to the previous Namespace context.
 202      *
 203      * <p>Normally, you should pop the context at the end of each
 204      * XML element.  After popping the context, all Namespace prefix
 205      * mappings that were previously in force are restored.</p>
 206      *
 207      * <p>You must not attempt to declare additional Namespace
 208      * prefixes after popping a context, unless you push another
 209      * context first.</p>
 210      *
 211      * @see #pushContext
 212      */
 213     public void popContext ()
 214     {
 215         contexts[contextPos].clear();
 216         contextPos--;
 217         if (contextPos < 0) {
 218             throw new EmptyStackException();
 219         }
 220         currentContext = contexts[contextPos];
 221     }
 222
 223
 224 \f
 225     ////////////////////////////////////////////////////////////////////
 226     // Operations within a context.
 227     ////////////////////////////////////////////////////////////////////
 228
 229
 230     /**
 231      * Declare a Namespace prefix.  All prefixes must be declared
 232      * before they are referenced.  For example, a SAX driver (parser)
 233      * would scan an element's attributes
 234      * in two passes:  first for namespace declarations,
 235      * then a second pass using {@link #processName processName()} to
 236      * interpret prefixes against (potentially redefined) prefixes.
 237      *
 238      * <p>This method declares a prefix in the current Namespace
 239      * context; the prefix will remain in force until this context
 240      * is popped, unless it is shadowed in a descendant context.</p>
 241      *
 242      * <p>To declare the default element Namespace, use the empty string as
 243      * the prefix.</p>
 244      *
 245      * <p>Note that you must <em>not</em> declare a prefix after
 246      * you've pushed and popped another Namespace context, or
 247      * treated the declarations phase as complete by processing
 248      * a prefixed name.</p>
 249      *
 250      * <p>Note that there is an asymmetry in this library: {@link
 251      * #getPrefix getPrefix} will not return the "" prefix,
 252      * even if you have declared a default element namespace.
 253      * To check for a default namespace,
 254      * you have to look it up explicitly using {@link #getURI getURI}.
 255      * This asymmetry exists to make it easier to look up prefixes
 256      * for attribute names, where the default prefix is not allowed.</p>
 257      *
 258      * @param prefix The prefix to declare, or the empty string to
 259      *  indicate the default element namespace.  This may never have
 260      *  the value "xml" or "xmlns".
 261      * @param uri The Namespace URI to associate with the prefix.
 262      * @return true if the prefix was legal, false otherwise
 263      * @exception IllegalStateException when a prefix is declared
 264      *  after looking up a name in the context, or after pushing
 265      *  another context on top of it.
 266      *
 267      * @see #processName
 268      * @see #getURI
 269      * @see #getPrefix
 270      */
 271     public boolean declarePrefix (String prefix, String uri)
 272     {
 273         if (prefix.equals("xml") || prefix.equals("xmlns")) {
 274             return false;
 275         } else {
 276             currentContext.declarePrefix(prefix, uri);
 277             return true;
 278         }
 279     }
 280
 281
 282     /**
 283      * Process a raw XML 1.0 name, after all declarations in the current
 284      * context have been handled by {@link #declarePrefix declarePrefix()}.
 285      *
 286      * <p>This method processes a raw XML 1.0 name in the current
 287      * context by removing the prefix and looking it up among the
 288      * prefixes currently declared.  The return value will be the
 289      * array supplied by the caller, filled in as follows:</p>
 290      *
 291      * <dl>
 292      * <dt>parts[0]</dt>
 293      * <dd>The Namespace URI, or an empty string if none is
 294      *  in use.</dd>
 295      * <dt>parts[1]</dt>
 296      * <dd>The local name (without prefix).</dd>
 297      * <dt>parts[2]</dt>
 298      * <dd>The original raw name.</dd>
 299      * </dl>
 300      *
 301      * <p>All of the strings in the array will be internalized.  If
 302      * the raw name has a prefix that has not been declared, then
 303      * the return value will be null.</p>
 304      *
 305      * <p>Note that attribute names are processed differently than
 306      * element names: an unprefixed element name will received the
 307      * default Namespace (if any), while an unprefixed attribute name
 308      * will not.</p>
 309      *
 310      * @param qName The raw XML 1.0 name to be processed.
 311      * @param parts An array supplied by the caller, capable of
 312      *        holding at least three members.
 313      * @param isAttribute A flag indicating whether this is an
 314      *        attribute name (true) or an element name (false).
 315      * @return The supplied array holding three internalized strings
 316      *        representing the Namespace URI (or empty string), the
 317      *        local name, and the raw XML 1.0 name; or null if there
 318      *        is an undeclared prefix.
 319      * @see #declarePrefix
 320      * @see java.lang.String#intern */
 321     public String [] processName (String qName, String parts[],
 322                                   boolean isAttribute)
 323     {
 324         String myParts[] = currentContext.processName(qName, isAttribute);
 325         if (myParts == null) {
 326             return null;
 327         } else {
 328             parts[0] = myParts[0];
 329             parts[1] = myParts[1];
 330             parts[2] = myParts[2];
 331             return parts;
 332         }
 333     }
 334
 335
 336     /**
 337      * Look up a prefix and get the currently-mapped Namespace URI.
 338      *
 339      * <p>This method looks up the prefix in the current context.
 340      * Use the empty string ("") for the default Namespace.</p>
 341      *
 342      * @param prefix The prefix to look up.
 343      * @return The associated Namespace URI, or null if the prefix
 344      *         is undeclared in this context.
 345      * @see #getPrefix
 346      * @see #getPrefixes
 347      */
 348     public String getURI (String prefix)
 349     {
 350         return currentContext.getURI(prefix);
 351     }
 352
 353
 354     /**
 355      * Return an enumeration of all prefixes currently declared.
 356      *
 357      * <p><strong>Note:</strong> if there is a default prefix, it will not be
 358      * returned in this enumeration; check for the default prefix
 359      * using the {@link #getURI getURI} with an argument of "".</p>
 360      *
 361      * @return An enumeration of all prefixes declared in the
 362      *         current context except for the empty (default)
 363      *         prefix.
 364      * @see #getDeclaredPrefixes
 365      * @see #getURI
 366      */
 367     public Enumeration getPrefixes ()
 368     {
 369         return currentContext.getPrefixes();
 370     }
 371
 372
 373     /**
 374      * Return one of the prefixes mapped to a Namespace URI.
 375      *
 376      * <p>If more than one prefix is currently mapped to the same
 377      * URI, this method will make an arbitrary selection; if you
 378      * want all of the prefixes, use the {@link #getPrefixes}
 379      * method instead.</p>
 380      *
 381      * <p><strong>Note:</strong> this will never return the empty (default) prefix;
 382      * to check for a default prefix, use the {@link #getURI getURI}
 383      * method with an argument of "".</p>
 384      *
 385      * @param uri The Namespace URI.
 386      * @param isAttribute true if this prefix is for an attribute
 387      *        (and the default Namespace is not allowed).
 388      * @return One of the prefixes currently mapped to the URI supplied,
 389      *         or null if none is mapped or if the URI is assigned to
 390      *         the default Namespace.
 391      * @see #getPrefixes(java.lang.String)
 392      * @see #getURI
 393      */
 394     public String getPrefix (String uri)
 395     {
 396         return currentContext.getPrefix(uri);
 397     }
 398
 399
 400     /**
 401      * Return an enumeration of all prefixes currently declared for a URI.
 402      *
 403      * <p>This method returns prefixes mapped to a specific Namespace
 404      * URI.  The xml: prefix will be included.  If you want only one
 405      * prefix that's mapped to the Namespace URI, and you don't care
 406      * which one you get, use the {@link #getPrefix getPrefix}
 407      *  method instead.</p>
 408      *
 409      * <p><strong>Note:</strong> the empty (default) prefix is <em>never</em> included
 410      * in this enumeration; to check for the presence of a default
 411      * Namespace, use the {@link #getURI getURI} method with an
 412      * argument of "".</p>
 413      *
 414      * @param uri The Namespace URI.
 415      * @return An enumeration of all prefixes declared in the
 416      *         current context.
 417      * @see #getPrefix
 418      * @see #getDeclaredPrefixes
 419      * @see #getURI
 420      */
 421     public Enumeration getPrefixes (String uri)
 422     {
 423         Vector prefixes = new Vector();
 424         Enumeration allPrefixes = getPrefixes();
 425         while (allPrefixes.hasMoreElements()) {
 426             String prefix = (String)allPrefixes.nextElement();
 427             if (uri.equals(getURI(prefix))) {
 428                 prefixes.addElement(prefix);
 429             }
 430         }
 431         return prefixes.elements();
 432     }
 433
 434
 435     /**
 436      * Return an enumeration of all prefixes declared in this context.
 437      *
 438      * <p>The empty (default) prefix will be included in this
 439      * enumeration; note that this behaviour differs from that of
 440      * {@link #getPrefix} and {@link #getPrefixes}.</p>
 441      *
 442      * @return An enumeration of all prefixes declared in this
 443      *         context.
 444      * @see #getPrefixes
 445      * @see #getURI
 446      */
 447     public Enumeration getDeclaredPrefixes ()
 448     {
 449         return currentContext.getDeclaredPrefixes();
 450     }
 451
 452
 453 \f
 454     ////////////////////////////////////////////////////////////////////
 455     // Internal state.
 456     ////////////////////////////////////////////////////////////////////
 457
 458     private Context contexts[];
 459     private Context currentContext;
 460     private int contextPos;
 461
 462
 463 \f
 464     ////////////////////////////////////////////////////////////////////
 465     // Internal classes.
 466     ////////////////////////////////////////////////////////////////////
 467
 468     /**
 469      * Internal class for a single Namespace context.
 470      *
 471      * <p>This module caches and reuses Namespace contexts,
 472      * so the number allocated
 473      * will be equal to the element depth of the document, not to the total
 474      * number of elements (i.e. 5-10 rather than tens of thousands).
 475      * Also, data structures used to represent contexts are shared when
 476      * possible (child contexts without declarations) to further reduce
 477      * the amount of memory that's consumed.
 478      * </p>
 479      */
 480     final class Context {
 481
 482         /**
 483          * Create the root-level Namespace context.
 484          */
 485         Context ()
 486         {
 487             copyTables();
 488         }
 489
 490
 491         /**
 492          * (Re)set the parent of this Namespace context.
 493          * The context must either have been freshly constructed,
 494          * or must have been cleared.
 495          *
 496          * @param context The parent Namespace context object.
 497          */
 498         void setParent (Context parent)
 499         {
 500             this.parent = parent;
 501             declarations = null;
 502             prefixTable = parent.prefixTable;
 503             uriTable = parent.uriTable;
 504             elementNameTable = parent.elementNameTable;
 505             attributeNameTable = parent.attributeNameTable;
 506             defaultNS = parent.defaultNS;
 507             declSeen = false;
 508             declsOK = true;
 509         }
 510
 511         /**
 512          * Makes associated state become collectible,
 513          * invalidating this context.
 514          * {@link #setParent} must be called before
 515          * this context may be used again.
 516          */
 517         void clear ()
 518         {
 519             parent = null;
 520             prefixTable = null;
 521             uriTable = null;
 522             elementNameTable = null;
 523             attributeNameTable = null;
 524             defaultNS = null;
 525         }
 526
 527
 528         /**
 529          * Declare a Namespace prefix for this context.
 530          *
 531          * @param prefix The prefix to declare.
 532          * @param uri The associated Namespace URI.
 533          * @see org.xml.sax.helpers.NamespaceSupport#declarePrefix
 534          */
 535         void declarePrefix (String prefix, String uri)
 536         {
 537                                 // Lazy processing...
 538             if (!declsOK)
 539                 throw new IllegalStateException (
 540                     "can't declare any more prefixes in this context");
 541             if (!declSeen) {
 542                 copyTables();
 543             }
 544             if (declarations == null) {
 545                 declarations = new Vector();
 546             }
 547
 548             prefix = prefix.intern();
 549             uri = uri.intern();
 550             if ("".equals(prefix)) {
 551                 if ("".equals(uri)) {
 552                     defaultNS = null;
 553                 } else {
 554                     defaultNS = uri;
 555                 }
 556             } else {
 557                 prefixTable.put(prefix, uri);
 558                 uriTable.put(uri, prefix); // may wipe out another prefix
 559             }
 560             declarations.addElement(prefix);
 561         }
 562
 563
 564         /**
 565          * Process a raw XML 1.0 name in this context.
 566          *
 567          * @param qName The raw XML 1.0 name.
 568          * @param isAttribute true if this is an attribute name.
 569          * @return An array of three strings containing the
 570          *         URI part (or empty string), the local part,
 571          *         and the raw name, all internalized, or null
 572          *         if there is an undeclared prefix.
 573          * @see org.xml.sax.helpers.NamespaceSupport#processName
 574          */
 575         String [] processName (String qName, boolean isAttribute)
 576         {
 577             String name[];
 578             Hashtable table;
 579
 580                                 // detect errors in call sequence
 581             declsOK = false;
 582
 583                                 // Select the appropriate table.
 584             if (isAttribute) {
 585                 table = attributeNameTable;
 586             } else {
 587                 table = elementNameTable;
 588             }
 589
 590                                 // Start by looking in the cache, and
 591                                 // return immediately if the name
 592                                 // is already known in this content
 593             name = (String[])table.get(qName);
 594             if (name != null) {
 595                 return name;
 596             }
 597
 598                                 // We haven't seen this name in this
 599                                 // context before.  Maybe in the parent
 600                                 // context, but we can't assume prefix
 601                                 // bindings are the same.
 602             name = new String[3];
 603             name[2] = qName.intern();
 604             int index = qName.indexOf(':');
 605
 606
 607                                 // No prefix.
 608             if (index == -1) {
 609                 if (isAttribute || defaultNS == null) {
 610                     name[0] = "";
 611                 } else {
 612                     name[0] = defaultNS;
 613                 }
 614                 name[1] = name[2];
 615             }
 616
 617                                 // Prefix
 618             else {
 619                 String prefix = qName.substring(0, index);
 620                 String local = qName.substring(index+1);
 621                 String uri;
 622                 if ("".equals(prefix)) {
 623                     uri = defaultNS;
 624                 } else {
 625                     uri = (String)prefixTable.get(prefix);
 626                 }
 627                 if (uri == null) {
 628                     return null;
 629                 }
 630                 name[0] = uri;
 631                 name[1] = local.intern();
 632             }
 633
 634                                 // Save in the cache for future use.
 635                                 // (Could be shared with parent context...)
 636             table.put(name[2], name);
 637             return name;
 638         }
 639
 640
 641         /**
 642          * Look up the URI associated with a prefix in this context.
 643          *
 644          * @param prefix The prefix to look up.
 645          * @return The associated Namespace URI, or null if none is
 646          *         declared.
 647          * @see org.xml.sax.helpers.NamespaceSupport#getURI
 648          */
 649         String getURI (String prefix)
 650         {
 651             if ("".equals(prefix)) {
 652                 return defaultNS;
 653             } else if (prefixTable == null) {
 654                 return null;
 655             } else {
 656                 return (String)prefixTable.get(prefix);
 657             }
 658         }
 659
 660
 661         /**
 662          * Look up one of the prefixes associated with a URI in this context.
 663          *
 664          * <p>Since many prefixes may be mapped to the same URI,
 665          * the return value may be unreliable.</p>
 666          *
 667          * @param uri The URI to look up.
 668          * @return The associated prefix, or null if none is declared.
 669          * @see org.xml.sax.helpers.NamespaceSupport#getPrefix
 670          */
 671         String getPrefix (String uri)
 672         {
 673             if (uriTable == null) {
 674                 return null;
 675             } else {
 676                 return (String)uriTable.get(uri);
 677             }
 678         }
 679
 680
 681         /**
 682          * Return an enumeration of prefixes declared in this context.
 683          *
 684          * @return An enumeration of prefixes (possibly empty).
 685          * @see org.xml.sax.helpers.NamespaceSupport#getDeclaredPrefixes
 686          */
 687         Enumeration getDeclaredPrefixes ()
 688         {
 689             if (declarations == null) {
 690                 return EMPTY_ENUMERATION;
 691             } else {
 692                 return declarations.elements();
 693             }
 694         }
 695
 696
 697         /**
 698          * Return an enumeration of all prefixes currently in force.
 699          *
 700          * <p>The default prefix, if in force, is <em>not</em>
 701          * returned, and will have to be checked for separately.</p>
 702          *
 703          * @return An enumeration of prefixes (never empty).
 704          * @see org.xml.sax.helpers.NamespaceSupport#getPrefixes
 705          */
 706         Enumeration getPrefixes ()
 707         {
 708             if (prefixTable == null) {
 709                 return EMPTY_ENUMERATION;
 710             } else {
 711                 return prefixTable.keys();
 712             }
 713         }
 714
 715
 716 \f
 717         ////////////////////////////////////////////////////////////////
 718         // Internal methods.
 719         ////////////////////////////////////////////////////////////////
 720
 721
 722         /**
 723          * Copy on write for the internal tables in this context.
 724          *
 725          * <p>This class is optimized for the normal case where most
 726          * elements do not contain Namespace declarations.</p>
 727          */
 728         private void copyTables ()
 729         {
 730             if (prefixTable != null) {
 731                 prefixTable = (Hashtable)prefixTable.clone();
 732             } else {
 733                 prefixTable = new Hashtable();
 734             }
 735             if (uriTable != null) {
 736                 uriTable = (Hashtable)uriTable.clone();
 737             } else {
 738                 uriTable = new Hashtable();
 739             }
 740             elementNameTable = new Hashtable();
 741             attributeNameTable = new Hashtable();
 742             declSeen = true;
 743         }
 744
 745
 746 \f
 747         ////////////////////////////////////////////////////////////////
 748         // Protected state.
 749         ////////////////////////////////////////////////////////////////
 750
 751         Hashtable prefixTable;
 752         Hashtable uriTable;
 753         Hashtable elementNameTable;
 754         Hashtable attributeNameTable;
 755         String defaultNS = null;
 756         boolean declsOK = true;
 757
 758
 759 \f
 760         ////////////////////////////////////////////////////////////////
 761         // Internal state.
 762         ////////////////////////////////////////////////////////////////
 763
 764         private Vector declarations = null;
 765         private boolean declSeen = false;
 766         private Context parent = null;
 767     }
 768 }
 769
 770 // end of NamespaceSupport.java