1 /*
2 * reserved comment block
3 * DO NOT REMOVE OR ALTER!
4 */
5 /*
6 * Copyright 2001-2004 The Apache Software Foundation.
7 *
8 * Licensed under the Apache License, Version 2.0 (the "License");
9 * you may not use this file except in compliance with the License.
10 * You may obtain a copy of the License at
11 *
12 * http://www.apache.org/licenses/LICENSE-2.0
13 *
14 * Unless required by applicable law or agreed to in writing, software
15 * distributed under the License is distributed on an "AS IS" BASIS,
16 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 * See the License for the specific language governing permissions and
18 * limitations under the License.
19 */
20 /*
21 * $Id: AbstractTranslet.java,v 1.6 2006/06/19 19:49:03 spericas Exp $
22 */
23
24 package com.sun.org.apache.xalan.internal.xsltc.runtime;
25
26 import com.sun.org.apache.xalan.internal.XalanConstants;
27 import com.sun.org.apache.xalan.internal.utils.FactoryImpl;
28 import java.io.File;
29 import java.io.FileOutputStream;
30 import java.io.BufferedOutputStream;
31 import java.text.DecimalFormat;
32 import java.text.DecimalFormatSymbols;
33 import java.util.ArrayList;
34 import java.util.Enumeration;
35 import java.util.Vector;
36 import javax.xml.transform.Templates;
37 import javax.xml.parsers.DocumentBuilderFactory;
38 import org.w3c.dom.Document;
39 import org.w3c.dom.DOMImplementation;
40 import javax.xml.parsers.ParserConfigurationException;
41
42 import com.sun.org.apache.xml.internal.dtm.DTM;
43
44 import com.sun.org.apache.xalan.internal.xsltc.DOM;
45 import com.sun.org.apache.xalan.internal.xsltc.DOMCache;
46 import com.sun.org.apache.xalan.internal.xsltc.DOMEnhancedForDTM;
47 import com.sun.org.apache.xalan.internal.xsltc.Translet;
48 import com.sun.org.apache.xalan.internal.xsltc.TransletException;
49 import com.sun.org.apache.xalan.internal.xsltc.dom.DOMAdapter;
50 import com.sun.org.apache.xalan.internal.xsltc.dom.KeyIndex;
51 import com.sun.org.apache.xalan.internal.xsltc.runtime.output.TransletOutputHandlerFactory;
52 import com.sun.org.apache.xml.internal.dtm.DTMAxisIterator;
53 import com.sun.org.apache.xml.internal.serializer.SerializationHandler;
54
55 /**
56 * @author Jacek Ambroziak
57 * @author Santiago Pericas-Geertsen
58 * @author Morten Jorgensen
59 * @author G. Todd Miller
60 * @author John Howard, JohnH@schemasoft.com
61 */
62 public abstract class AbstractTranslet implements Translet {
63
64 // These attributes are extracted from the xsl:output element. They also
65 // appear as fields (with the same type, only public) in Output.java
66 public String _version = "1.0";
67 public String _method = null;
68 public String _encoding = "UTF-8";
69 public boolean _omitHeader = false;
70 public String _standalone = null;
71 //see OutputPropertiesFactory.ORACLE_IS_STANDALONE
72 public boolean _isStandalone = false;
73 public String _doctypePublic = null;
74 public String _doctypeSystem = null;
75 public boolean _indent = false;
76 public String _mediaType = null;
77 public Vector _cdata = null;
78 public int _indentamount = -1;
79
80 public static final int FIRST_TRANSLET_VERSION = 100;
81 public static final int VER_SPLIT_NAMES_ARRAY = 101;
82 public static final int CURRENT_TRANSLET_VERSION = VER_SPLIT_NAMES_ARRAY;
83
84 // Initialize Translet version field to base value. A class that extends
85 // AbstractTranslet may override this value to a more recent translet
86 // version; if it doesn't override the value (because it was compiled
87 // before the notion of a translet version was introduced, it will get
88 // this default value).
89 protected int transletVersion = FIRST_TRANSLET_VERSION;
90
91 // DOM/translet handshaking - the arrays are set by the compiled translet
92 protected String[] namesArray;
93 protected String[] urisArray;
94 protected int[] typesArray;
95 protected String[] namespaceArray;
96
97 // The Templates object that is used to create this Translet instance
98 protected Templates _templates = null;
99
100 // Boolean flag to indicate whether this translet has id functions.
101 protected boolean _hasIdCall = false;
102
103 // TODO - these should only be instanciated when needed
104 protected StringValueHandler stringValueHandler = new StringValueHandler();
105
106 // Use one empty string instead of constantly instanciating String("");
107 private final static String EMPTYSTRING = "";
108
109 // This is the name of the index used for ID attributes
110 private final static String ID_INDEX_NAME = "##id";
111
112 private boolean _useServicesMechanism;
113
114 /**
115 * protocols allowed for external references set by the stylesheet processing instruction, Document() function, Import and Include element.
116 */
117 private String _accessExternalStylesheet = XalanConstants.EXTERNAL_ACCESS_DEFAULT;
118
119 /************************************************************************
120 * Debugging
121 ************************************************************************/
122 public void printInternalState() {
123 System.out.println("-------------------------------------");
124 System.out.println("AbstractTranslet this = " + this);
125 System.out.println("pbase = " + pbase);
126 System.out.println("vframe = " + pframe);
127 System.out.println("paramsStack.size() = " + paramsStack.size());
128 System.out.println("namesArray.size = " + namesArray.length);
129 System.out.println("namespaceArray.size = " + namespaceArray.length);
130 System.out.println("");
131 System.out.println("Total memory = " + Runtime.getRuntime().totalMemory());
132 }
133
134 /**
135 * Wrap the initial input DOM in a dom adapter. This adapter is wrapped in
136 * a DOM multiplexer if the document() function is used (handled by compiled
137 * code in the translet - see compiler/Stylesheet.compileTransform()).
138 */
139 public final DOMAdapter makeDOMAdapter(DOM dom)
140 throws TransletException {
141 setRootForKeys(dom.getDocument());
142 return new DOMAdapter(dom, namesArray, urisArray, typesArray, namespaceArray);
143 }
144
145 /************************************************************************
146 * Parameter handling
147 ************************************************************************/
148
149 // Parameter's stack: <tt>pbase</tt> and <tt>pframe</tt> are used
150 // to denote the current parameter frame.
151 protected int pbase = 0, pframe = 0;
152 protected ArrayList paramsStack = new ArrayList();
153
154 /**
155 * Push a new parameter frame.
156 */
157 public final void pushParamFrame() {
158 paramsStack.add(pframe, new Integer(pbase));
159 pbase = ++pframe;
160 }
161
162 /**
163 * Pop the topmost parameter frame.
164 */
165 public final void popParamFrame() {
166 if (pbase > 0) {
167 final int oldpbase = ((Integer)paramsStack.get(--pbase)).intValue();
168 for (int i = pframe - 1; i >= pbase; i--) {
169 paramsStack.remove(i);
170 }
171 pframe = pbase; pbase = oldpbase;
172 }
173 }
174
175 /**
176 * Add a new global parameter if not already in the current frame.
177 * To setParameters of the form {http://foo.bar}xyz
178 * This needs to get mapped to an instance variable in the class
179 * The mapping created so that
180 * the global variables in the generated class become
181 * http$colon$$flash$$flash$foo$dot$bar$colon$xyz
182 */
183 public final Object addParameter(String name, Object value) {
184 name = BasisLibrary.mapQNameToJavaName (name);
185 return addParameter(name, value, false);
186 }
187
188 /**
189 * Add a new global or local parameter if not already in the current frame.
190 * The 'isDefault' parameter is set to true if the value passed is the
191 * default value from the <xsl:parameter> element's select attribute or
192 * element body.
193 */
194 public final Object addParameter(String name, Object value,
195 boolean isDefault)
196 {
197 // Local parameters need to be re-evaluated for each iteration
198 for (int i = pframe - 1; i >= pbase; i--) {
199 final Parameter param = (Parameter) paramsStack.get(i);
200
201 if (param._name.equals(name)) {
202 // Only overwrite if current value is the default value and
203 // the new value is _NOT_ the default value.
204 if (param._isDefault || !isDefault) {
205 param._value = value;
206 param._isDefault = isDefault;
207 return value;
208 }
209 return param._value;
210 }
211 }
212
213 // Add new parameter to parameter stack
214 paramsStack.add(pframe++, new Parameter(name, value, isDefault));
215 return value;
216 }
217
218 /**
219 * Clears the parameter stack.
220 */
221 public void clearParameters() {
222 pbase = pframe = 0;
223 paramsStack.clear();
224 }
225
226 /**
227 * Get the value of a parameter from the current frame or
228 * <tt>null</tt> if undefined.
229 */
230 public final Object getParameter(String name) {
231
232 name = BasisLibrary.mapQNameToJavaName (name);
233
234 for (int i = pframe - 1; i >= pbase; i--) {
235 final Parameter param = (Parameter)paramsStack.get(i);
236 if (param._name.equals(name)) return param._value;
237 }
238 return null;
239 }
240
241 /************************************************************************
242 * Message handling - implementation of <xsl:message>
243 ************************************************************************/
244
245 // Holds the translet's message handler - used for <xsl:message>.
246 // The deault message handler dumps a string stdout, but anything can be
247 // used, such as a dialog box for applets, etc.
248 private MessageHandler _msgHandler = null;
249
250 /**
251 * Set the translet's message handler - must implement MessageHandler
252 */
253 public final void setMessageHandler(MessageHandler handler) {
254 _msgHandler = handler;
255 }
256
257 /**
258 * Pass a message to the message handler - used by Message class.
259 */
260 public final void displayMessage(String msg) {
261 if (_msgHandler == null) {
262 System.err.println(msg);
263 }
264 else {
265 _msgHandler.displayMessage(msg);
266 }
267 }
268
269 /************************************************************************
270 * Decimal number format symbol handling
271 ************************************************************************/
272
273 // Contains decimal number formatting symbols used by FormatNumberCall
274 public Hashtable _formatSymbols = null;
275
276 /**
277 * Adds a DecimalFormat object to the _formatSymbols hashtable.
278 * The entry is created with the input DecimalFormatSymbols.
279 */
280 public void addDecimalFormat(String name, DecimalFormatSymbols symbols) {
281 // Instanciate hashtable for formatting symbols if needed
282 if (_formatSymbols == null) _formatSymbols = new Hashtable();
283
284 // The name cannot be null - use empty string instead
285 if (name == null) name = EMPTYSTRING;
286
287 // Construct a DecimalFormat object containing the symbols we got
288 final DecimalFormat df = new DecimalFormat();
289 if (symbols != null) {
290 df.setDecimalFormatSymbols(symbols);
291 }
292 _formatSymbols.put(name, df);
293 }
294
295 /**
296 * Retrieves a named DecimalFormat object from _formatSymbols hashtable.
297 */
298 public final DecimalFormat getDecimalFormat(String name) {
299
300 if (_formatSymbols != null) {
301 // The name cannot be null - use empty string instead
302 if (name == null) name = EMPTYSTRING;
303
304 DecimalFormat df = (DecimalFormat)_formatSymbols.get(name);
305 if (df == null) df = (DecimalFormat)_formatSymbols.get(EMPTYSTRING);
306 return df;
307 }
308 return(null);
309 }
310
311 /**
312 * Give the translet an opportunity to perform a prepass on the document
313 * to extract any information that it can store in an optimized form.
314 *
315 * Currently, it only extracts information about attributes of type ID.
316 */
317 public final void prepassDocument(DOM document) {
318 setIndexSize(document.getSize());
319 buildIDIndex(document);
320 }
321
322 /**
323 * Leverages the Key Class to implement the XSLT id() function.
324 * buildIdIndex creates the index (##id) that Key Class uses.
325 * The index contains the element node index (int) and Id value (String).
326 */
327 private final void buildIDIndex(DOM document) {
328 setRootForKeys(document.getDocument());
329
330 if (document instanceof DOMEnhancedForDTM) {
331 DOMEnhancedForDTM enhancedDOM = (DOMEnhancedForDTM)document;
332
333 // If the input source is DOMSource, the KeyIndex table is not
334 // built at this time. It will be built later by the lookupId()
335 // and containsId() methods of the KeyIndex class.
336 if (enhancedDOM.hasDOMSource()) {
337 buildKeyIndex(ID_INDEX_NAME, document);
338 return;
339 }
340 else {
341 final Hashtable elementsByID = enhancedDOM.getElementsWithIDs();
342
343 if (elementsByID == null) {
344 return;
345 }
346
347 // Given a Hashtable of DTM nodes indexed by ID attribute values,
348 // loop through the table copying information to a KeyIndex
349 // for the mapping from ID attribute value to DTM node
350 final Enumeration idValues = elementsByID.keys();
351 boolean hasIDValues = false;
352
353 while (idValues.hasMoreElements()) {
354 final Object idValue = idValues.nextElement();
355 final int element =
356 document.getNodeHandle(
357 ((Integer)elementsByID.get(idValue))
358 .intValue());
359
360 buildKeyIndex(ID_INDEX_NAME, element, idValue);
361 hasIDValues = true;
362 }
363
364 if (hasIDValues) {
365 setKeyIndexDom(ID_INDEX_NAME, document);
366 }
367 }
368 }
369 }
370
371 /**
372 * After constructing the translet object, this method must be called to
373 * perform any version-specific post-initialization that's required.
374 */
375 public final void postInitialization() {
376 // If the version of the translet had just one namesArray, split
377 // it into multiple fields.
378 if (transletVersion < VER_SPLIT_NAMES_ARRAY) {
379 int arraySize = namesArray.length;
380 String[] newURIsArray = new String[arraySize];
381 String[] newNamesArray = new String[arraySize];
382 int[] newTypesArray = new int[arraySize];
383
384 for (int i = 0; i < arraySize; i++) {
385 String name = namesArray[i];
386 int colonIndex = name.lastIndexOf(':');
387 int lNameStartIdx = colonIndex+1;
388
389 if (colonIndex > -1) {
390 newURIsArray[i] = name.substring(0, colonIndex);
391 }
392
393 // Distinguish attribute and element names. Attribute has
394 // @ before local part of name.
395 if (name.charAt(lNameStartIdx) == '@') {
396 lNameStartIdx++;
397 newTypesArray[i] = DTM.ATTRIBUTE_NODE;
398 } else if (name.charAt(lNameStartIdx) == '?') {
399 lNameStartIdx++;
400 newTypesArray[i] = DTM.NAMESPACE_NODE;
401 } else {
402 newTypesArray[i] = DTM.ELEMENT_NODE;
403 }
404 newNamesArray[i] =
405 (lNameStartIdx == 0) ? name
406 : name.substring(lNameStartIdx);
407 }
408
409 namesArray = newNamesArray;
410 urisArray = newURIsArray;
411 typesArray = newTypesArray;
412 }
413
414 // Was translet compiled using a more recent version of the XSLTC
415 // compiler than is known by the AbstractTranslet class? If, so
416 // and we've made it this far (which is doubtful), we should give up.
417 if (transletVersion > CURRENT_TRANSLET_VERSION) {
418 BasisLibrary.runTimeError(BasisLibrary.UNKNOWN_TRANSLET_VERSION_ERR,
419 this.getClass().getName());
420 }
421 }
422
423 /************************************************************************
424 * Index(es) for <xsl:key> / key() / id()
425 ************************************************************************/
426
427 // Container for all indexes for xsl:key elements
428 private Hashtable _keyIndexes = null;
429 private KeyIndex _emptyKeyIndex = null;
430 private int _indexSize = 0;
431 private int _currentRootForKeys = 0;
432
433 /**
434 * This method is used to pass the largest DOM size to the translet.
435 * Needed to make sure that the translet can index the whole DOM.
436 */
437 public void setIndexSize(int size) {
438 if (size > _indexSize) _indexSize = size;
439 }
440
441 /**
442 * Creates a KeyIndex object of the desired size - don't want to resize!!!
443 */
444 public KeyIndex createKeyIndex() {
445 return(new KeyIndex(_indexSize));
446 }
447
448 /**
449 * Adds a value to a key/id index
450 * @param name is the name of the index (the key or ##id)
451 * @param node is the node handle of the node to insert
452 * @param value is the value that will look up the node in the given index
453 */
454 public void buildKeyIndex(String name, int node, Object value) {
455 if (_keyIndexes == null) _keyIndexes = new Hashtable();
456
457 KeyIndex index = (KeyIndex)_keyIndexes.get(name);
458 if (index == null) {
459 _keyIndexes.put(name, index = new KeyIndex(_indexSize));
460 }
461 index.add(value, node, _currentRootForKeys);
462 }
463
464 /**
465 * Create an empty KeyIndex in the DOM case
466 * @param name is the name of the index (the key or ##id)
467 * @param dom is the DOM
468 */
469 public void buildKeyIndex(String name, DOM dom) {
470 if (_keyIndexes == null) _keyIndexes = new Hashtable();
471
472 KeyIndex index = (KeyIndex)_keyIndexes.get(name);
473 if (index == null) {
474 _keyIndexes.put(name, index = new KeyIndex(_indexSize));
475 }
476 index.setDom(dom, dom.getDocument());
477 }
478
479 /**
480 * Returns the index for a given key (or id).
481 * The index implements our internal iterator interface
482 */
483 public KeyIndex getKeyIndex(String name) {
484 // Return an empty key index iterator if none are defined
485 if (_keyIndexes == null) {
486 return (_emptyKeyIndex != null)
487 ? _emptyKeyIndex
488 : (_emptyKeyIndex = new KeyIndex(1));
489 }
490
491 // Look up the requested key index
492 final KeyIndex index = (KeyIndex)_keyIndexes.get(name);
493
494 // Return an empty key index iterator if the requested index not found
495 if (index == null) {
496 return (_emptyKeyIndex != null)
497 ? _emptyKeyIndex
498 : (_emptyKeyIndex = new KeyIndex(1));
499 }
500
501 return(index);
502 }
503
504 private void setRootForKeys(int root) {
505 _currentRootForKeys = root;
506 }
507
508 /**
509 * This method builds key indexes - it is overridden in the compiled
510 * translet in cases where the <xsl:key> element is used
511 */
512 public void buildKeys(DOM document, DTMAxisIterator iterator,
513 SerializationHandler handler,
514 int root) throws TransletException {
515
516 }
517
518 /**
519 * This method builds key indexes - it is overridden in the compiled
520 * translet in cases where the <xsl:key> element is used
521 */
522 public void setKeyIndexDom(String name, DOM document) {
523 getKeyIndex(name).setDom(document, document.getDocument());
524 }
525
526 /************************************************************************
527 * DOM cache handling
528 ************************************************************************/
529
530 // Hold the DOM cache (if any) used with this translet
531 private DOMCache _domCache = null;
532
533 /**
534 * Sets the DOM cache used for additional documents loaded using the
535 * document() function.
536 */
537 public void setDOMCache(DOMCache cache) {
538 _domCache = cache;
539 }
540
541 /**
542 * Returns the DOM cache used for this translet. Used by the LoadDocument
543 * class (if present) when the document() function is used.
544 */
545 public DOMCache getDOMCache() {
546 return(_domCache);
547 }
548
549 /************************************************************************
550 * Multiple output document extension.
551 * See compiler/TransletOutput for actual implementation.
552 ************************************************************************/
553
554 public SerializationHandler openOutputHandler(String filename, boolean append)
555 throws TransletException
556 {
557 try {
558 final TransletOutputHandlerFactory factory
559 = TransletOutputHandlerFactory.newInstance();
560
561 String dirStr = new File(filename).getParent();
562 if ((null != dirStr) && (dirStr.length() > 0)) {
563 File dir = new File(dirStr);
564 dir.mkdirs();
565 }
566
567 factory.setEncoding(_encoding);
568 factory.setOutputMethod(_method);
569 factory.setOutputStream(new BufferedOutputStream(new FileOutputStream(filename, append)));
570 factory.setOutputType(TransletOutputHandlerFactory.STREAM);
571
572 final SerializationHandler handler
573 = factory.getSerializationHandler();
574
575 transferOutputSettings(handler);
576 handler.startDocument();
577 return handler;
578 }
579 catch (Exception e) {
580 throw new TransletException(e);
581 }
582 }
583
584 public SerializationHandler openOutputHandler(String filename)
585 throws TransletException
586 {
587 return openOutputHandler(filename, false);
588 }
589
590 public void closeOutputHandler(SerializationHandler handler) {
591 try {
592 handler.endDocument();
593 handler.close();
594 }
595 catch (Exception e) {
596 // what can you do?
597 }
598 }
599
600 /************************************************************************
601 * Native API transformation methods - _NOT_ JAXP/TrAX
602 ************************************************************************/
603
604 /**
605 * Main transform() method - this is overridden by the compiled translet
606 */
607 public abstract void transform(DOM document, DTMAxisIterator iterator,
608 SerializationHandler handler)
609 throws TransletException;
610
611 /**
612 * Calls transform() with a given output handler
613 */
614 public final void transform(DOM document, SerializationHandler handler)
615 throws TransletException {
616 try {
617 transform(document, document.getIterator(), handler);
618 } finally {
619 _keyIndexes = null;
620 }
621 }
622
623 /**
624 * Used by some compiled code as a shortcut for passing strings to the
625 * output handler
626 */
627 public final void characters(final String string,
628 SerializationHandler handler)
629 throws TransletException {
630 if (string != null) {
631 //final int length = string.length();
632 try {
633 handler.characters(string);
634 } catch (Exception e) {
635 throw new TransletException(e);
636 }
637 }
638 }
639
640 /**
641 * Add's a name of an element whose text contents should be output as CDATA
642 */
643 public void addCdataElement(String name) {
644 if (_cdata == null) {
645 _cdata = new Vector();
646 }
647
648 int lastColon = name.lastIndexOf(':');
649
650 if (lastColon > 0) {
651 String uri = name.substring(0, lastColon);
652 String localName = name.substring(lastColon+1);
653 _cdata.addElement(uri);
654 _cdata.addElement(localName);
655 } else {
656 _cdata.addElement(null);
657 _cdata.addElement(name);
658 }
659 }
660
661 /**
662 * Transfer the output settings to the output post-processor
663 */
664 protected void transferOutputSettings(SerializationHandler handler) {
665 if (_method != null) {
666 if (_method.equals("xml")) {
667 if (_standalone != null) {
668 handler.setStandalone(_standalone);
669 }
670 if (_omitHeader) {
671 handler.setOmitXMLDeclaration(true);
672 }
673 handler.setCdataSectionElements(_cdata);
674 if (_version != null) {
675 handler.setVersion(_version);
676 }
677 handler.setIndent(_indent);
678 handler.setIndentAmount(_indentamount);
679 if (_doctypeSystem != null) {
680 handler.setDoctype(_doctypeSystem, _doctypePublic);
681 }
682 handler.setIsStandalone(_isStandalone);
683 }
684 else if (_method.equals("html")) {
685 handler.setIndent(_indent);
686 handler.setDoctype(_doctypeSystem, _doctypePublic);
687 if (_mediaType != null) {
688 handler.setMediaType(_mediaType);
689 }
690 }
691 }
692 else {
693 handler.setCdataSectionElements(_cdata);
694 if (_version != null) {
695 handler.setVersion(_version);
696 }
697 if (_standalone != null) {
698 handler.setStandalone(_standalone);
699 }
700 if (_omitHeader) {
701 handler.setOmitXMLDeclaration(true);
702 }
703 handler.setIndent(_indent);
704 handler.setDoctype(_doctypeSystem, _doctypePublic);
705 handler.setIsStandalone(_isStandalone);
706 }
707 }
708
709 private Hashtable _auxClasses = null;
710
711 public void addAuxiliaryClass(Class auxClass) {
712 if (_auxClasses == null) _auxClasses = new Hashtable();
713 _auxClasses.put(auxClass.getName(), auxClass);
714 }
715
716 public void setAuxiliaryClasses(Hashtable auxClasses) {
717 _auxClasses = auxClasses;
718 }
719
720 public Class getAuxiliaryClass(String className) {
721 if (_auxClasses == null) return null;
722 return((Class)_auxClasses.get(className));
723 }
724
725 // GTM added (see pg 110)
726 public String[] getNamesArray() {
727 return namesArray;
728 }
729
730 public String[] getUrisArray() {
731 return urisArray;
732 }
733
734 public int[] getTypesArray() {
735 return typesArray;
736 }
737
738 public String[] getNamespaceArray() {
739 return namespaceArray;
740 }
741
742 public boolean hasIdCall() {
743 return _hasIdCall;
744 }
745
746 public Templates getTemplates() {
747 return _templates;
748 }
749
750 public void setTemplates(Templates templates) {
751 _templates = templates;
752 }
753 /**
754 * Return the state of the services mechanism feature.
755 */
756 public boolean useServicesMechnism() {
757 return _useServicesMechanism;
758 }
759
760 /**
761 * Set the state of the services mechanism feature.
762 */
763 public void setServicesMechnism(boolean flag) {
764 _useServicesMechanism = flag;
765 }
766
767 /**
768 * Return allowed protocols for accessing external stylesheet.
769 */
770 public String getAllowedProtocols() {
771 return _accessExternalStylesheet;
772 }
773
774 /**
775 * Set allowed protocols for accessing external stylesheet.
776 */
777 public void setAllowedProtocols(String protocols) {
778 _accessExternalStylesheet = protocols;
779 }
780
781 /************************************************************************
782 * DOMImplementation caching for basis library
783 ************************************************************************/
784 protected DOMImplementation _domImplementation = null;
785
786 public Document newDocument(String uri, String qname)
787 throws ParserConfigurationException
788 {
789 if (_domImplementation == null) {
790 DocumentBuilderFactory dbf = FactoryImpl.getDOMFactory(_useServicesMechanism);
791 _domImplementation = dbf.newDocumentBuilder().getDOMImplementation();
792 }
793 return _domImplementation.createDocument(uri, qname, null);
794 }
795 }