Java > Open Source Codes > org > xml > sax > helpers > NamespaceSupport


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 1.4.14.1.2.1 2004/08/03 23:10:57 kk122374 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      */
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      */
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      */
197     public void pushContext ()
198     {
199     int max = contexts.length;
200
201     contextPos++;
202
203                 // Extend the array if necessary
204 if (contextPos >= max) {
205         Context newContexts[] = new Context[max*2];
206         System.arraycopy(contexts, 0, newContexts, 0, max);
207         max *= 2;
208         contexts = newContexts;
209     }
210
211                 // Allocate the context if necessary.
212 currentContext = contexts[contextPos];
213     if (currentContext == null) {
214         contexts[contextPos] = currentContext = new Context();
215     }
216
217                 // Set the parent, if any.
218 if (contextPos > 0) {
219         currentContext.setParent(contexts[contextPos - 1]);
220     }
221     }
222
223
224     /**
225      * Revert to the previous Namespace context.
226      *
227      * <p>Normally, you should pop the context at the end of each
228      * XML element. After popping the context, all Namespace prefix
229      * mappings that were previously in force are restored.</p>
230      *
231      * <p>You must not attempt to declare additional Namespace
232      * prefixes after popping a context, unless you push another
233      * context first.</p>
234      *
235      * @see #pushContext
236      */
237     public void popContext ()
238     {
239     contexts[contextPos].clear();
240     contextPos--;
241     if (contextPos < 0) {
242         throw new EmptyStackException ();
243     }
244     currentContext = contexts[contextPos];
245     }
246
247
248 
249     ////////////////////////////////////////////////////////////////////
250 // Operations within a context.
251 ////////////////////////////////////////////////////////////////////
252
253
254     /**
255      * Declare a Namespace prefix. All prefixes must be declared
256      * before they are referenced. For example, a SAX driver (parser)
257      * would scan an element's attributes
258      * in two passes: first for namespace declarations,
259      * then a second pass using {@link #processName processName()} to
260      * interpret prefixes against (potentially redefined) prefixes.
261      *
262      * <p>This method declares a prefix in the current Namespace
263      * context; the prefix will remain in force until this context
264      * is popped, unless it is shadowed in a descendant context.</p>
265      *
266      * <p>To declare the default element Namespace, use the empty string as
267      * the prefix.</p>
268      *
269      * <p>Note that there is an asymmetry in this library: {@link
270      * #getPrefix getPrefix} will not return the "" prefix,
271      * even if you have declared a default element namespace.
272      * To check for a default namespace,
273      * you have to look it up explicitly using {@link #getURI getURI}.
274      * This asymmetry exists to make it easier to look up prefixes
275      * for attribute names, where the default prefix is not allowed.</p>
276      *
277      * @param prefix The prefix to declare, or the empty string to
278      * indicate the default element namespace. This may never have
279      * the value "xml" or "xmlns".
280      * @param uri The Namespace URI to associate with the prefix.
281      * @return true if the prefix was legal, false otherwise
282      *
283      * @see #processName
284      * @see #getURI
285      * @see #getPrefix
286      */
287     public boolean declarePrefix (String prefix, String uri)
288     {
289     if (prefix.equals("xml") || prefix.equals("xmlns")) {
290         return false;
291     } else {
292         currentContext.declarePrefix(prefix, uri);
293         return true;
294     }
295     }
296
297
298     /**
299      * Process a raw XML qualified name, after all declarations in the
300      * current context have been handled by {@link #declarePrefix
301      * declarePrefix()}.
302      *
303      * <p>This method processes a raw XML qualified name in the
304      * current context by removing the prefix and looking it up among
305      * the prefixes currently declared. The return value will be the
306      * array supplied by the caller, filled in as follows:</p>
307      *
308      * <dl>
309      * <dt>parts[0]</dt>
310      * <dd>The Namespace URI, or an empty string if none is
311      * in use.</dd>
312      * <dt>parts[1]</dt>
313      * <dd>The local name (without prefix).</dd>
314      * <dt>parts[2]</dt>
315      * <dd>The original raw name.</dd>
316      * </dl>
317      *
318      * <p>All of the strings in the array will be internalized. If
319      * the raw name has a prefix that has not been declared, then
320      * the return value will be null.</p>
321      *
322      * <p>Note that attribute names are processed differently than
323      * element names: an unprefixed element name will receive the
324      * default Namespace (if any), while an unprefixed attribute name
325      * will not.</p>
326      *
327      * @param qName The XML qualified name to be processed.
328      * @param parts An array supplied by the caller, capable of
329      * holding at least three members.
330      * @param isAttribute A flag indicating whether this is an
331      * attribute name (true) or an element name (false).
332      * @return The supplied array holding three internalized strings
333      * representing the Namespace URI (or empty string), the
334      * local name, and the XML qualified name; or null if there
335      * is an undeclared prefix.
336      * @see #declarePrefix
337      * @see java.lang.String#intern */
338     public String [] processName (String qName, String parts[],
339                   boolean isAttribute)
340     {
341     String myParts[] = currentContext.processName(qName, isAttribute);
342     if (myParts == null) {
343         return null;
344     } else {
345         parts[0] = myParts[0];
346         parts[1] = myParts[1];
347         parts[2] = myParts[2];
348         return parts;
349     }
350     }
351
352
353     /**
354      * Look up a prefix and get the currently-mapped Namespace URI.
355      *
356      * <p>This method looks up the prefix in the current context.
357      * Use the empty string ("") for the default Namespace.</p>
358      *
359      * @param prefix The prefix to look up.
360      * @return The associated Namespace URI, or null if the prefix
361      * is undeclared in this context.
362      * @see #getPrefix
363      * @see #getPrefixes
364      */
365     public String getURI (String prefix)
366     {
367     return currentContext.getURI(prefix);
368     }
369
370
371     /**
372      * Return an enumeration of all prefixes whose declarations are
373      * active in the current context.
374      * This includes declarations from parent contexts that have
375      * not been overridden.
376      *
377      * <p><strong>Note:</strong> if there is a default prefix, it will not be
378      * returned in this enumeration; check for the default prefix
379      * using the {@link #getURI getURI} with an argument of "".</p>
380      *
381      * @return An enumeration of prefixes (never empty).
382      * @see #getDeclaredPrefixes
383      * @see #getURI
384      */
385     public Enumeration getPrefixes ()
386     {
387     return currentContext.getPrefixes();
388     }
389
390
391     /**
392      * Return one of the prefixes mapped to a Namespace URI.
393      *
394      * <p>If more than one prefix is currently mapped to the same
395      * URI, this method will make an arbitrary selection; if you
396      * want all of the prefixes, use the {@link #getPrefixes}
397      * method instead.</p>
398      *
399      * <p><strong>Note:</strong> this will never return the empty (default) prefix;
400      * to check for a default prefix, use the {@link #getURI getURI}
401      * method with an argument of "".</p>
402      *
403      * @param uri the namespace URI
404      * @return one of the prefixes currently mapped to the URI supplied,
405      * or null if none is mapped or if the URI is assigned to
406      * the default namespace
407      * @see #getPrefixes(java.lang.String)
408      * @see #getURI
409      */
410     public String getPrefix (String uri)
411     {
412     return currentContext.getPrefix(uri);
413     }
414
415
416     /**
417      * Return an enumeration of all prefixes for a given URI whose
418      * declarations are active in the current context.
419      * This includes declarations from parent contexts that have
420      * not been overridden.
421      *
422      * <p>This method returns prefixes mapped to a specific Namespace
423      * URI. The xml: prefix will be included. If you want only one
424      * prefix that's mapped to the Namespace URI, and you don't care
425      * which one you get, use the {@link #getPrefix getPrefix}
426      * method instead.</p>
427      *
428      * <p><strong>Note:</strong> the empty (default) prefix is <em>never</em> included
429      * in this enumeration; to check for the presence of a default
430      * Namespace, use the {@link #getURI getURI} method with an
431      * argument of "".</p>
432      *
433      * @param uri The Namespace URI.
434      * @return An enumeration of prefixes (never empty).
435      * @see #getPrefix
436      * @see #getDeclaredPrefixes
437      * @see #getURI
438      */
439     public Enumeration getPrefixes (String uri)
440     {
441     Vector prefixes = new Vector ();
442     Enumeration allPrefixes = getPrefixes();
443     while (allPrefixes.hasMoreElements()) {
444         String prefix = (String )allPrefixes.nextElement();
445         if (uri.equals(getURI(prefix))) {
446         prefixes.addElement(prefix);
447         }
448     }
449     return prefixes.elements();
450     }
451
452
453     /**
454      * Return an enumeration of all prefixes declared in this context.
455      *
456      * <p>The empty (default) prefix will be included in this
457      * enumeration; note that this behaviour differs from that of
458      * {@link #getPrefix} and {@link #getPrefixes}.</p>
459      *
460      * @return An enumeration of all prefixes declared in this
461      * context.
462      * @see #getPrefixes
463      * @see #getURI
464      */
465     public Enumeration getDeclaredPrefixes ()
466     {
467     return currentContext.getDeclaredPrefixes();
468     }
469
470     /**
471      * Controls whether namespace declaration attributes are placed
472      * into the {@link #NSDECL NSDECL} namespace
473      * by {@link #processName processName()}. This may only be
474      * changed before any contexts have been pushed.
475      *
476      * @since SAX 2.1alpha
477      *
478      * @exception IllegalStateException when attempting to set this
479      * after any context has been pushed.
480      */
481     public void setNamespaceDeclUris (boolean value)
482     {
483     if (contextPos != 0)
484         throw new IllegalStateException ();
485     if (value == namespaceDeclUris)
486         return;
487     namespaceDeclUris = value;
488     if (value)
489         currentContext.declarePrefix ("xmlns", NSDECL);
490     else {
491         contexts[contextPos] = currentContext = new Context();
492         currentContext.declarePrefix("xml", XMLNS);
493     }
494     }
495
496     /**
497      * Returns true if namespace declaration attributes are placed into
498      * a namespace. This behavior is not the default.
499      *
500      * @since SAX 2.1alpha
501      */
502     public boolean isNamespaceDeclUris ()
503     { return namespaceDeclUris; }
504
505
506 
507     ////////////////////////////////////////////////////////////////////
508 // Internal state.
509 ////////////////////////////////////////////////////////////////////
510
511     private Context contexts[];
512     private Context currentContext;
513     private int contextPos;
514     private boolean namespaceDeclUris;
515
516 
517     ////////////////////////////////////////////////////////////////////
518 // Internal classes.
519 ////////////////////////////////////////////////////////////////////
520
521     /**
522      * Internal class for a single Namespace context.
523      *
524      * <p>This module caches and reuses Namespace contexts,
525      * so the number allocated
526      * will be equal to the element depth of the document, not to the total
527      * number of elements (i.e. 5-10 rather than tens of thousands).
528      * Also, data structures used to represent contexts are shared when
529      * possible (child contexts without declarations) to further reduce
530      * the amount of memory that's consumed.
531      * </p>
532      */
533     final class Context {
534
535     /**
536      * Create the root-level Namespace context.
537      */
538     Context ()
539     {
540         copyTables();
541     }
542     
543     
544     /**
545      * (Re)set the parent of this Namespace context.
546      * The context must either have been freshly constructed,
547      * or must have been cleared.
548      *
549      * @param context The parent Namespace context object.
550      */
551     void setParent (Context parent)
552     {
553         this.parent = parent;
554         declarations = null;
555         prefixTable = parent.prefixTable;
556         uriTable = parent.uriTable;
557         elementNameTable = parent.elementNameTable;
558         attributeNameTable = parent.attributeNameTable;
559         defaultNS = parent.defaultNS;
560         declSeen = false;
561     }
562
563     /**
564      * Makes associated state become collectible,
565      * invalidating this context.
566      * {@link #setParent} must be called before
567      * this context may be used again.
568      */
569     void clear ()
570     {
571         parent = null;
572         prefixTable = null;
573         uriTable = null;
574         elementNameTable = null;
575         attributeNameTable = null;
576         defaultNS = null;
577     }
578     
579     
580     /**
581      * Declare a Namespace prefix for this context.
582      *
583      * @param prefix The prefix to declare.
584      * @param uri The associated Namespace URI.
585      * @see org.xml.sax.helpers.NamespaceSupport#declarePrefix
586      */
587     void declarePrefix (String prefix, String uri)
588     {
589                 // Lazy processing...
590 // if (!declsOK)
591 // throw new IllegalStateException (
592 // "can't declare any more prefixes in this context");
593 if (!declSeen) {
594         copyTables();
595         }
596         if (declarations == null) {
597         declarations = new Vector ();
598         }
599         
600         prefix = prefix.intern();
601         uri = uri.intern();
602         if ("".equals(prefix)) {
603         if ("".equals(uri)) {
604             defaultNS = null;
605         } else {
606             defaultNS = uri;
607         }
608         } else {
609         prefixTable.put(prefix, uri);
610         uriTable.put(uri, prefix); // may wipe out another prefix
611 }
612         declarations.addElement(prefix);
613     }
614
615
616     /**
617      * Process an XML qualified name in this context.
618      *
619      * @param qName The XML qualified name.
620      * @param isAttribute true if this is an attribute name.
621      * @return An array of three strings containing the
622      * URI part (or empty string), the local part,
623      * and the raw name, all internalized, or null
624      * if there is an undeclared prefix.
625      * @see org.xml.sax.helpers.NamespaceSupport#processName
626      */
627     String [] processName (String qName, boolean isAttribute)
628     {
629         String name[];
630         Hashtable table;
631         
632                 // Select the appropriate table.
633 if (isAttribute) {
634         table = attributeNameTable;
635         } else {
636         table = elementNameTable;
637         }
638         
639                 // Start by looking in the cache, and
640 // return immediately if the name
641 // is already known in this content
642 name = (String [])table.get(qName);
643         if (name != null) {
644         return name;
645         }
646         
647                 // We haven't seen this name in this
648 // context before. Maybe in the parent
649 // context, but we can't assume prefix
650 // bindings are the same.
651 name = new String [3];
652         name[2] = qName.intern();
653         int index = qName.indexOf(':');
654         
655         
656                 // No prefix.
657 if (index == -1) {
658         if (isAttribute) {
659             if (qName == "xmlns" && namespaceDeclUris)
660             name[0] = NSDECL;
661             else
662             name[0] = "";
663         } else if (defaultNS == null) {
664             name[0] = "";
665         } else {
666             name[0] = defaultNS;
667         }
668         name[1] = name[2];
669         }
670         
671                 // Prefix
672 else {
673         String prefix = qName.substring(0, index);
674         String local = qName.substring(index+1);
675         String uri;
676         if ("".equals(prefix)) {
677             uri = defaultNS;
678         } else {
679             uri = (String )prefixTable.get(prefix);
680         }
681         if (uri == null
682             || (!isAttribute && "xmlns".equals (prefix))) {
683             return null;
684         }
685         name[0] = uri;
686         name[1] = local.intern();
687         }
688         
689                 // Save in the cache for future use.
690 // (Could be shared with parent context...)
691 table.put(name[2], name);
692         return name;
693     }
694     
695
696     /**
697      * Look up the URI associated with a prefix in this context.
698      *
699      * @param prefix The prefix to look up.
700      * @return The associated Namespace URI, or null if none is
701      * declared.
702      * @see org.xml.sax.helpers.NamespaceSupport#getURI
703      */
704     String getURI (String prefix)
705     {
706         if ("".equals(prefix)) {
707         return defaultNS;
708         } else if (prefixTable == null) {
709         return null;
710         } else {
711         return (String )prefixTable.get(prefix);
712         }
713     }
714
715
716     /**
717      * Look up one of the prefixes associated with a URI in this context.
718      *
719      * <p>Since many prefixes may be mapped to the same URI,
720      * the return value may be unreliable.</p>
721      *
722      * @param uri The URI to look up.
723      * @return The associated prefix, or null if none is declared.
724      * @see org.xml.sax.helpers.NamespaceSupport#getPrefix
725      */
726     String getPrefix (String uri)
727     {
728         if (uriTable == null) {
729         return null;
730         } else {
731         return (String )uriTable.get(uri);
732         }
733     }
734     
735     
736     /**
737      * Return an enumeration of prefixes declared in this context.
738      *
739      * @return An enumeration of prefixes (possibly empty).
740      * @see org.xml.sax.helpers.NamespaceSupport#getDeclaredPrefixes
741      */
742     Enumeration getDeclaredPrefixes ()
743     {
744         if (declarations == null) {
745         return EMPTY_ENUMERATION;
746         } else {
747         return declarations.elements();
748         }
749     }
750     
751     
752     /**
753      * Return an enumeration of all prefixes currently in force.
754      *
755      * <p>The default prefix, if in force, is <em>not</em>
756      * returned, and will have to be checked for separately.</p>
757      *
758      * @return An enumeration of prefixes (never empty).
759      * @see org.xml.sax.helpers.NamespaceSupport#getPrefixes
760      */
761     Enumeration getPrefixes ()
762     {
763         if (prefixTable == null) {
764         return EMPTY_ENUMERATION;
765         } else {
766         return prefixTable.keys();
767         }
768     }
769     
770     
771 
772     ////////////////////////////////////////////////////////////////
773 // Internal methods.
774 ////////////////////////////////////////////////////////////////
775
776
777     /**
778      * Copy on write for the internal tables in this context.
779      *
780      * <p>This class is optimized for the normal case where most
781      * elements do not contain Namespace declarations.</p>
782      */
783     private void copyTables ()
784     {
785         if (prefixTable != null) {
786         prefixTable = (Hashtable )prefixTable.clone();
787         } else {
788         prefixTable = new Hashtable ();
789         }
790         if (uriTable != null) {
791         uriTable = (Hashtable )uriTable.clone();
792         } else {
793         uriTable = new Hashtable ();
794         }
795         elementNameTable = new Hashtable ();
796         attributeNameTable = new Hashtable ();
797         declSeen = true;
798     }
799
800
801 
802     ////////////////////////////////////////////////////////////////
803 // Protected state.
804 ////////////////////////////////////////////////////////////////
805
806     Hashtable prefixTable;
807     Hashtable uriTable;
808     Hashtable elementNameTable;
809     Hashtable attributeNameTable;
810     String defaultNS = null;
811     
812
813 
814     ////////////////////////////////////////////////////////////////
815 // Internal state.
816 ////////////////////////////////////////////////////////////////
817
818     private Vector declarations = null;
819     private boolean declSeen = false;
820     private Context parent = null;
821     }
822 }
823
824 // end of NamespaceSupport.java
825

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