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## org.apache.xalan.xslt
Class XSLTEngineImpl

    java.lang.Object
      |
      +--org.apache.xalan.xslt.XSLTEngineImpl

public class XSLTEngineImpl
extends java.lang.Object
implements XPathEnvSupport, XSLTProcessor

**For advanced use only** The Xalan workhorse -- Collaborates with the XML parser liaison, the DOM, and the XPath engine, to transform a source tree of nodes into a result tree according to instructions and templates specified by a stylesheet tree. We suggest you use one of the static XSLTProcessorFactory getProcessor() methods to instantiate the processor and return an interface that greatly simplifies the process of manipulating XSLTEngineImpl.

The methods `process(...)` are the primary public entry points. The best way to perform transformations is to use the `XSLTProcessor.process(XSLTInputSource, XSLTInputSource, XSLTResultTarget)` method, but you may use any of process methods defined in XSLTEngineImpl.

Please note that this class is not safe per instance over multiple threads. If you are in a multithreaded environment, you should keep a pool of these objects, or create a new one each time. In a multithreaded environment, the right way to do things is to create a StylesheetRoot via processStylesheet, and then reuse this object over multiple threads.

If you reuse the processor instance, you should call reset() between transformations.

See Also:
  `XSLTProcessorFactory`, `XSLTProcessor`

Field Summary
`static int` | `m_recursionLimit` **For advanced use only** Used for infinite loop check.

Constructor Summary
`XSLTEngineImpl(java.lang.String parserLiaisonClassName)` **For advanced use only** Construct an XSLT processor that uses the the given parser liaison.
`XSLTEngineImpl(XMLParserLiaison parserLiason)` **For advanced use only** Construct an XSL processor that uses the the given parser liaison.

Method Summary
`void` | `addTraceListener(TraceListener tl)` **For advanced use only** Add a trace listener for the purposes of debugging and diagnosis.
`void` | `associateXLocatorToNode(org.w3c.dom.Node node, XLocator xlocator)` **For advanced use only** Associate an XLocator provider to a node.
`void` | `characters(char[] ch, int start, int length)` **For advanced use only** Implement the characters event.
`void` | `charactersRaw(char[] ch, int start, int length)` **For advanced use only** Implement the characters event.
`void` | `comment(char[] ch, int start, int length)` **For advanced use only** Report an XML comment anywhere in the document.
`XMLParserLiaison` | `createLiaison()` **For advanced use only** Get a Liaison class, as specified by parserLiaisonClassName property Patch from Costin Manolache
`StylesheetRoot` | `createStylesheetRoot(java.lang.String baseIdentifier)` **For advanced use only** Bottleneck the creation of the stylesheet for derivation purposes.
`XBoolean` | `createXBoolean(boolean b)` **For advanced use only** Convenience function to create an XBoolean.
`XMLParserLiaison` | `createXercesLiaison()` **For advanced use only** Create a Xerces Liaison - used for special handling of DTM Patch from Costin Manolache
`XNodeSet` | `createXNodeSet(org.w3c.dom.Node n)` **For advanced use only** Convenience function to create an XNodeSet from a node.
`XNodeSet` | `createXNodeSet(org.w3c.dom.NodeList nl)` **For advanced use only** Convenience function to create an XNodeSet.
`XNull` | `createXNull()` **For advanced use only** Convenience function to create an XNull.
`XNumber` | `createXNumber(double d)` **For advanced use only** Convenience function to create an XNumber.
`XObject` | `createXObject(java.lang.Object o)` **For advanced use only** Convenience function to create an XObject.
`XString` | `createXString(java.lang.String s)` **For advanced use only** Convenience function to create an XString.
`void` | `deassociateXLocatorToNode(org.w3c.dom.Node node)` **For advanced use only** Deassociate an XLocator provider to a node.
`boolean` | `elementAvailable(java.lang.String namespace, java.lang.String extensionName)` **For advanced use only** Execute the element-available() function.
`void` | `endCDATA()` **For advanced use only** Report the end of a CDATA section.
`void` | `endDocument()` **For advanced use only** Implement the endDocument event.
`void` | `endDTD()` **For advanced use only** Report the end of DTD declarations.
`void` | `endElement(java.lang.String name)` **For advanced use only** Implement the endElement event.
`void` | `endEntity(java.lang.String name)` **For advanced use only** Report the end of an entity.
`void` | `error(int msg)` **For internal use only** Tell the user of an error, and probably throw an exception.
`void` | `error(int msg, java.lang.Exception e)` **For internal use only** Tell the user of an error, and probably throw an exception.
`void` | `error(int msg, java.lang.Object[] args)` **For internal use only** Tell the user of an error, and probably throw an exception.
`void` | `error(int msg, java.lang.Object[] args, java.lang.Exception e)` **For internal use only** Tell the user of an error, and probably throw an exception.
`void` | `error(org.w3c.dom.Node styleNode, org.w3c.dom.Node sourceNode, int msg)` **For internal use only** Tell the user of an error, and probably throw an exception.
`void` | `error(org.w3c.dom.Node styleNode, org.w3c.dom.Node sourceNode, int msg, java.lang.Object[] args)` **For internal use only** Tell the user of an error, and probably throw an exception.
`void` | `error(java.lang.String msg)` **For internal use only** Tell the user of an error, and probably throw an exception.
`java.lang.Object` | `extFunction(java.lang.String namespace, java.lang.String extensionName, java.util.Vector argVec, java.lang.Object methodKey)` **For advanced use only** Handle an extension function.
`java.lang.String` | `findURIFromDoc(org.w3c.dom.Document doc)` **For advanced use only** Given a DOM Document, tell what URI was used to parse it.
`boolean` | `functionAvailable(java.lang.String namespace, java.lang.String extensionName)` **For advanced use only** Execute the function-available() function.
`StylesheetSpec` | `getAssociatedStylesheet(XSLTInputSource source, java.lang.String media, java.lang.String charset)` **For advanced use only** Get the preferred InputSource specification that is associated with a given document specified in the source param, via the xml-stylesheet processing instruction (see http://www.w3.org/TR/xml-stylesheet/), and that matches the given criteria.
`java.util.Vector` | `getAssociatedStylesheets(XSLTInputSource source, java.lang.String mediaRequest, java.lang.String charsetRequest)` **For advanced use only** Get the InputSource specifications that are associated with a given document specified in the source param, via the xml-stylesheet processing instruction (see http://www.w3.org/TR/xml-stylesheet/), and that matches the given criteria.
`org.xml.sax.DocumentHandler` | `getDocumentHandler()` **For advanced use only** Get the current DocumentHandler.
`org.w3c.dom.Document` | `getDOMFactory()` **For advanced use only** Get a DOM document, primarily for creating result tree fragments.
`XPathSupport` | `getExecContext()` **For advanced use only** Get the execution context for XPath.
`org.xml.sax.DocumentHandler` | `getFormatterListener()` **For advanced use only** Get the current formatter listener.
`org.w3c.dom.NodeList` | `getNodeSetByKey(org.w3c.dom.Node doc, java.lang.String name, java.lang.String ref, PrefixResolver nscontext)` **For advanced use only** Given a valid element key, return the corresponding node list.
`java.lang.String` | `getOutputFileName()` **For internal use only** Get the filename of the output document, if it was set.
`ProblemListener` | `getProblemListener()` **For advanced use only** Get the problem listener property.
`java.util.Hashtable` | `getSourceDocsTable()` **For advanced use only** Get table of source tree documents.
`org.w3c.dom.Node` | `getSourceNode()` **For advanced use only** Returns the current input node that is being processed.
`org.w3c.dom.Node` | `getSourceNode(java.lang.String selectPattern, PrefixResolver namespaceContext)` **For advanced use only** Returns the current input node that is being processed.
`org.w3c.dom.Node` | `getSourceTreeFromInput(XSLTInputSource inputSource)` **For advanced use only** Given an input source, get the source tree.
`StylesheetRoot` | `getStylesheet()` **For advanced use only** Get the current stylesheet for this processor.
`java.lang.String` | `getStyleSheetURIfromDoc(org.w3c.dom.Node sourceTree)` Deprecated.
`java.net.URL` | `getURLFromString(java.lang.String urlString, java.lang.String base)` **For advanced use only** Take a user string and try and parse XML, and also return the url.
`XObject` | `getVariable(QName qname)` **For advanced use only** Given a name, locate a variable in the current context, and return the Object.
`XLocator` | `getXLocatorFromNode(org.w3c.dom.Node node)` **For advanced use only** Get an XLocator provider keyed by node.
`XMLParserLiaison` | `getXMLProcessorLiaison()` **For advanced use only** Get the XML Parser Liaison that this processor uses.
`void` | `ignorableWhitespace(char[] ch, int start, int length)` **For advanced use only** Implement the ignorableWhitespace event.
`void` | `message(org.w3c.dom.Node styleNode, org.w3c.dom.Node sourceNode, java.lang.String msg)` **For advanced use only** Warn the user of an problem.
`void` | `message(java.lang.String msg)` **For advanced use only** Warn the user of an problem.
`void` | `outputResultTreeFragment(XObject obj, XPathSupport support)` **For advanced use only** Given a result tree fragment, walk the tree and output it to the result stream.
`void` | `outputToResultTree(Stylesheet stylesheetTree, java.lang.Object obj)` **For advanced use only** Output an object to the result tree by doing the right conversions.
`org.w3c.dom.Document` | `parseXML(java.net.URL url, org.xml.sax.DocumentHandler docHandler, org.w3c.dom.Document docToRegister)` **For advanced use only** Read in the XML file, either producing a Document or calling SAX events, and register the document in a table.
`void` | `process(XSLTInputSource inputSource, XSLTInputSource stylesheetSource, XSLTResultTarget outputTarget)` **For advanced use only** Transform the source tree to the output in the given result tree target.
`void` | `processingInstruction(java.lang.String target, java.lang.String data)` **For advanced use only** Implement the processingInstruction event.
`StylesheetRoot` | `processStylesheet(java.lang.String xsldocURLString)` **For advanced use only** Given a URI to an XSL stylesheet, Compile the stylesheet into an internal representation.
`StylesheetRoot` | `processStylesheet(XSLTInputSource stylesheetSource)` **For advanced use only** Given a URI to an XSL stylesheet, Compile the stylesheet into an internal representation.
`void` | `removeTraceListener(TraceListener tl)` **For advanced use only** Remove a trace listener.
`void` | `reset()` **For advanced use only** Reset the state.
`void` | `setDiagnosticsOutput(java.io.OutputStream out)` **For advanced use only** If this is set, diagnostics will be written to the m_diagnosticsPrintWriter stream.
`void` | `setDiagnosticsOutput(java.io.PrintWriter pw)` **For advanced use only** If this is set, diagnostics will be written to the m_diagnosticsPrintWriter stream.
`void` | `setDocumentHandler(org.xml.sax.DocumentHandler listener)` **For advanced use only** Set the current DocumentHandler.
`void` | `setDocumentLocator(org.xml.sax.Locator locator)` **For advanced use only** Implement the setDocumentLocator event.
`void` | `setDOMFactory(org.w3c.dom.Document doc)` **For advanced use only** Set a DOM document factory, primarily for creating result tree fragments.
`void` | `setExecContext(XMLParserLiaison liaison)` **For advanced use only** Set the execution context for XPath.
`void` | `setFormatterListener(org.xml.sax.DocumentHandler flistener)` **For advanced use only** Set the current formatter listener.
`void` | `setOutputFileName(java.lang.String filename)` **For internal use only** Set the filename of the output document.
`void` | `setOutputStream(java.io.OutputStream os)` **For advanced use only** Set the output stream that will be used.
`void` | `setProblemListener(ProblemListener l)` **For advanced use only** Set the problem listener property.
`void` | `setQuietConflictWarnings(boolean b)` **For advanced use only** If the quietConflictWarnings property is set to true, warnings about pattern conflicts won't be printed to the diagnostics stream.
`void` | `setSourceDocument(java.lang.String uri, org.w3c.dom.Document doc)` **For advanced use only** Set a source document.
`void` | `setStylesheet(StylesheetRoot stylesheetRoot)` **For advanced use only** Set the stylesheet for this processor.
`void` | `setStylesheetParam(java.lang.String key, java.lang.String expression)` **For advanced use only** Push a top-level stylesheet parameter.
`void` | `setStylesheetParam(java.lang.String key, XObject value)` **For advanced use only** Push a top-level stylesheet parameter.
`void` | `setTraceSelect(boolean b)` **For advanced use only** If this is set to true, simple traces of template calls are made.
`void` | `setTraceTemplateChildren(boolean b)` **For advanced use only** If this is set to true, debug diagnostics about template children as they are being constructed will be written to the m_diagnosticsPrintWriter stream.
`void` | `setTraceTemplates(boolean b)` **For advanced use only** If this is set to true, simple traces of template calls are made.
`boolean` | `shouldStripSourceNode(org.w3c.dom.Node textNode)` **For internal use only** Tells, through the combination of the default-space attribute on xsl:stylesheet, xsl:strip-space, xsl:preserve-space, and the xml:space attribute, whether or not extra whitespace should be stripped from the node.
`void` | `startCDATA()` **For advanced use only** Report the start of a CDATA section.
`void` | `startDocument()` **For advanced use only** Implement the startDocument event.
`void` | `startDTD(java.lang.String name, java.lang.String publicId, java.lang.String systemId)` **For advanced use only** Report the start of DTD declarations, if any.
`void` | `startElement(java.lang.String name, org.xml.sax.AttributeList atts)` **For advanced use only** Implement the startElement event.
`void` | `startEntity(java.lang.String name)` **For advanced use only** Report the beginning of an entity.
`void` | `warn(int msg)` **For internal use only** Warn the user of an problem.
`void` | `warn(int msg, java.lang.Object[] args)` **For internal use only** Warn the user of an problem.
`void` | `warn(org.w3c.dom.Node styleNode, org.w3c.dom.Node sourceNode, int msg)` **For internal use only** Warn the user of an problem.
`void` | `warn(org.w3c.dom.Node styleNode, org.w3c.dom.Node sourceNode, int msg, java.lang.Object[] args)` **For internal use only** Warn the user of an problem.
`void` | `writeChildren(org.xml.sax.DocumentHandler flistener, Stylesheet stylesheetTree, ElemTemplateElement templateParent, org.w3c.dom.Node sourceTree, org.w3c.dom.Node sourceNode, QName mode)` **For internal use only** Write the children of a stylesheet element to the given listener.

Methods inherited from class java.lang.Object
`equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Field Detail

### m_recursionLimit

    public static int m_recursionLimit

  **For advanced use only** Used for infinite loop check. If the value is -1, do not check for infinite loops. Anyone who wants to enable that check should change the value of this variable to be the level of recursion that they want to check. Be careful setting this variable, if the number is too low, it may report an infinite loop situation, when there is none. Post version 1.0.0, we'll make this a runtime feature.

Constructor Detail

### XSLTEngineImpl

    public XSLTEngineImpl(java.lang.String parserLiaisonClassName)
                   throws org.xml.sax.SAXException

  **For advanced use only** Construct an XSLT processor that uses the the given parser liaison. As a general rule, you should use XSLTProcessorFactory to create an instance of this class and provide access to the instance via the XSLTProcessor interface.
  See Also:
    `XSLTProcessorFactory`, `XSLTProcessor`

### XSLTEngineImpl

    public XSLTEngineImpl(XMLParserLiaison parserLiason)

  **For advanced use only** Construct an XSL processor that uses the the given parser liaison. As a general rule, you should use XSLTProcessorFactory to create an instance of this class and provide access to the instance via the XSLTProcessor interface.
  Parameters:
    `XMLParserLiaison` - A liaison to an XML parser.
  See Also:
    `XMLParserLiaison`, `XSLTProcessorFactory`, `XSLTProcessor`

Method Detail

### reset

    public void reset()

  **For advanced use only** Reset the state. This needs to be called after a process() call is invoked, if the processor is to be used again.
  Specified by:
    reset in interface XSLTProcessor

### createLiaison

    public XMLParserLiaison createLiaison()
                                   throws org.xml.sax.SAXException

  **For advanced use only** Get a Liaison class, as specified by parserLiaisonClassName property Patch from Costin Manolache

### createXercesLiaison

    public XMLParserLiaison createXercesLiaison()
                                         throws org.xml.sax.SAXException

  **For advanced use only** Create a Xerces Liaison - used for special handling of DTM Patch from Costin Manolache

### process

    public void process(XSLTInputSource inputSource,
                        XSLTInputSource stylesheetSource,
                        XSLTResultTarget outputTarget)
                 throws org.xml.sax.SAXException

  **For advanced use only** Transform the source tree to the output in the given result tree target. As a general rule, we recommend you use the `XSLTProcessor#Process(XSLTInputSource, XSLTInputSource, XSLTResultTarget)` method.
  Specified by:
    process in interface XSLTProcessor
  Parameters:
    `inputSource` - The input source.
    `stylesheetSource` - The stylesheet source. May be null if source has a xml-stylesheet PI.
    `outputTarget` - The output source tree.
  Throws:
    XSLProcessorException - thrown if the active ProblemListener and XMLParserLiaison decide the error condition is severe enough to halt processing.

### createStylesheetRoot

    public StylesheetRoot createStylesheetRoot(java.lang.String baseIdentifier)
                                        throws java.net.MalformedURLException,
                                               java.io.FileNotFoundException,
                                               java.io.IOException,
                                               org.xml.sax.SAXException

  **For advanced use only** Bottleneck the creation of the stylesheet for derivation purposes.

### processStylesheet

    public StylesheetRoot processStylesheet(XSLTInputSource stylesheetSource)
                                     throws org.xml.sax.SAXException

  **For advanced use only** Given a URI to an XSL stylesheet, Compile the stylesheet into an internal representation. This calls reset() before processing if the stylesheet root has been set to non-null.
  Specified by:
    processStylesheet in interface XSLTProcessor
  Parameters:
    `xmldocURLString` - The URL to the input XML document.
  Returns:
    The compiled stylesheet object.
  Throws:
    XSLProcessorException - thrown if the active ProblemListener and XMLParserLiaison decide the error condition is severe enough to halt processing.

### processStylesheet

    public StylesheetRoot processStylesheet(java.lang.String xsldocURLString)
                                     throws org.xml.sax.SAXException

  **For advanced use only** Given a URI to an XSL stylesheet, Compile the stylesheet into an internal representation. This calls reset() before processing if the stylesheet root has been set to non-null.
  Specified by:
    processStylesheet in interface XSLTProcessor
  Parameters:
    `xmldocURLString` - The URL to the input XML document.
  Returns:
    The compiled stylesheet object.
  Throws:
    XSLProcessorException - thrown if the active ProblemListener and XMLParserLiaison decide the error condition is severe enough to halt processing.

### setStylesheet

    public void setStylesheet(StylesheetRoot stylesheetRoot)

  **For advanced use only** Set the stylesheet for this processor. If this is set, then the process calls that take only the input .xml will use this instead of looking for a stylesheet PI. Also, setting the stylesheet is needed if you are going to use the processor as a SAX DocumentHandler.
  Specified by:
    setStylesheet in interface XSLTProcessor

### getStylesheet

    public StylesheetRoot getStylesheet()

  **For advanced use only** Get the current stylesheet for this processor.
  Specified by:
    getStylesheet in interface XSLTProcessor

### getOutputFileName

    public java.lang.String getOutputFileName()

  **For internal use only** Get the filename of the output document, if it was set. This is for use by multiple output documents, to determine the base directory for the output document. It needs to be set by the caller.

### setOutputFileName

    public void setOutputFileName(java.lang.String filename)

  **For internal use only** Set the filename of the output document. This is for use by multiple output documents, to determine the base directory for the output document. It needs to be set by the caller.

### getURLFromString

    public java.net.URL getURLFromString(java.lang.String urlString,
                                         java.lang.String base)
                                  throws org.xml.sax.SAXException

  **For advanced use only** Take a user string and try and parse XML, and also return the url.
  Throws:
    XSLProcessorException - thrown if the active ProblemListener and XMLParserLiaison decide the error condition is severe enough to halt processing.

### getSourceTreeFromInput

    public org.w3c.dom.Node getSourceTreeFromInput(XSLTInputSource inputSource)
                                            throws org.xml.sax.SAXException

  **For advanced use only** Given an input source, get the source tree.
  Specified by:
    getSourceTreeFromInput in interface XSLTProcessor

### parseXML

    public org.w3c.dom.Document parseXML(java.net.URL url,
                                         org.xml.sax.DocumentHandler docHandler,
                                         org.w3c.dom.Document docToRegister)
                                  throws org.xml.sax.SAXException,
                                         java.io.IOException

  **For advanced use only** Read in the XML file, either producing a Document or calling SAX events, and register the document in a table. If the document has already been read in, it will not be reparsed.
  Parameters:
    `url` - The location of the XML.
    `docHandler` - The SAX event handler.
    `docToRegister` - If using a SAX event handler, the object to register in the source docs table.
  Returns:
    lcom.ms.xml.om.Document object, which represents the parsed XML.
  Throws:
    org.xml.sax.SAXException - thrown if the active ProblemListener and XMLParserLiaison decide the error condition is severe enough to halt processing.

### getAssociatedStylesheet

    public StylesheetSpec getAssociatedStylesheet(XSLTInputSource source,
                                                  java.lang.String media,
                                                  java.lang.String charset)
                                           throws org.xml.sax.SAXException

  **For advanced use only** Get the preferred InputSource specification that is associated with a given document specified in the source param, via the xml-stylesheet processing instruction (see http://www.w3.org/TR/xml-stylesheet/), and that matches the given criteria. Does not yet handle the LINK REL="stylesheet" syntax.
  Specified by:
    getAssociatedStylesheet in interface XSLTProcessor
  Parameters:
    `media` - The media attribute to be matched. May be null, in which case the prefered stylesheet will be used (i.e. alternate = no).
    `title` - The value of the title attribute to match. May be null.
    `charset` - The value of the charset attribute to match. May be null.

### getAssociatedStylesheets

    public java.util.Vector getAssociatedStylesheets(XSLTInputSource source,
                                                     java.lang.String mediaRequest,
                                                     java.lang.String charsetRequest)
                                              throws org.xml.sax.SAXException

  **For advanced use only** Get the InputSource specifications that are associated with a given document specified in the source param, via the xml-stylesheet processing instruction (see http://www.w3.org/TR/xml-stylesheet/), and that matches the given criteria. Does not yet handle the LINK REL="stylesheet" syntax.
  Specified by:
    getAssociatedStylesheets in interface XSLTProcessor
  Parameters:
    `media` - The media attribute to be matched. May be null, in which case the prefered stylesheet will be used (i.e. alternate = no).
    `title` - The value of the title attribute to match. May be null.
    `charset` - The value of the charset attribute to match. May be null.

### findURIFromDoc

    public java.lang.String findURIFromDoc(org.w3c.dom.Document doc)

  **For advanced use only** Given a DOM Document, tell what URI was used to parse it.
  Specified by:
    findURIFromDoc in interface XPathEnvSupport

### getSourceDocsTable

    public java.util.Hashtable getSourceDocsTable()

  **For advanced use only** Get table of source tree documents. Document objects are keyed by URL string.
  Specified by:
    getSourceDocsTable in interface XPathEnvSupport

### setSourceDocument

    public void setSourceDocument(java.lang.String uri,
                                  org.w3c.dom.Document doc)

  **For advanced use only** Set a source document. Every time a source document is requested through either xsl:uri or in a process call, the processor will first consult table of supplied documents before trying to load and parse the corresponding document from the Net.

### outputToResultTree

    public void outputToResultTree(Stylesheet stylesheetTree,
                                   java.lang.Object obj)
                            throws org.xml.sax.SAXException,
                                   java.net.MalformedURLException,
                                   java.io.FileNotFoundException,
                                   java.io.IOException

  **For advanced use only** Output an object to the result tree by doing the right conversions. This is public for access by extensions.
  Parameters:
    `obj` - the Java object to output. If its of an X type then that conversion is done first and then sent out.

### functionAvailable

    public boolean functionAvailable(java.lang.String namespace,
                                     java.lang.String extensionName)

  **For advanced use only** Execute the function-available() function.
  Specified by:
    functionAvailable in interface XPathEnvSupport

### elementAvailable

    public boolean elementAvailable(java.lang.String namespace,
                                    java.lang.String extensionName)

  **For advanced use only** Execute the element-available() function.
  Specified by:
    elementAvailable in interface XPathEnvSupport

### extFunction

    public java.lang.Object extFunction(java.lang.String namespace,
                                        java.lang.String extensionName,
                                        java.util.Vector argVec,
                                        java.lang.Object methodKey)
                                 throws org.xml.sax.SAXException

  **For advanced use only** Handle an extension function.
  Specified by:
    extFunction in interface XPathEnvSupport

### addTraceListener

    public void addTraceListener(TraceListener tl)
                          throws java.util.TooManyListenersException

  **For advanced use only** Add a trace listener for the purposes of debugging and diagnosis.
  Specified by:
    addTraceListener in interface XSLTProcessor
  Parameters:
    `tl` - Trace listener to be added.

### removeTraceListener

    public void removeTraceListener(TraceListener tl)

  **For advanced use only** Remove a trace listener.
  Specified by:
    removeTraceListener in interface XSLTProcessor
  Parameters:
    `tl` - Trace listener to be removed.

### message

    public void message(java.lang.String msg)
                 throws org.xml.sax.SAXException

  **For advanced use only** Warn the user of an problem. This is public for access by extensions.
  Throws:
    XSLProcessorException - thrown if the active ProblemListener and XMLParserLiaison decide the error condition is severe enough to halt processing.

### message

    public void message(org.w3c.dom.Node styleNode,
                        org.w3c.dom.Node sourceNode,
                        java.lang.String msg)
                 throws org.xml.sax.SAXException

  **For advanced use only** Warn the user of an problem. This is public for access by extensions.
  Throws:
    XSLProcessorException - thrown if the active ProblemListener and XMLParserLiaison decide the error condition is severe enough to halt processing.

### warn

    public void warn(int msg)
              throws org.xml.sax.SAXException

  **For internal use only** Warn the user of an problem.
  Throws:
    XSLProcessorException - thrown if the active ProblemListener and XMLParserLiaison decide the error condition is severe enough to halt processing.

### warn

    public void warn(int msg,
                     java.lang.Object[] args)
              throws org.xml.sax.SAXException

  **For internal use only** Warn the user of an problem.
  Throws:
    XSLProcessorException - thrown if the active ProblemListener and XMLParserLiaison decide the error condition is severe enough to halt processing.

### warn

    public void warn(org.w3c.dom.Node styleNode,
                     org.w3c.dom.Node sourceNode,
                     int msg)
              throws org.xml.sax.SAXException

  **For internal use only** Warn the user of an problem.
  Throws:
    XSLProcessorException - thrown if the active ProblemListener and XMLParserLiaison decide the error condition is severe enough to halt processing.

### warn

    public void warn(org.w3c.dom.Node styleNode,
                     org.w3c.dom.Node sourceNode,
                     int msg,
                     java.lang.Object[] args)
              throws org.xml.sax.SAXException

  **For internal use only** Warn the user of an problem.
  Throws:
    XSLProcessorException - thrown if the active ProblemListener and XMLParserLiaison decide the error condition is severe enough to halt processing.

### error

    public void error(java.lang.String msg)
               throws org.xml.sax.SAXException

  **For internal use only** Tell the user of an error, and probably throw an exception.
  Throws:
    XSLProcessorException - thrown if the active ProblemListener and XMLParserLiaison decide the error condition is severe enough to halt processing.

### error

    public void error(int msg)
               throws org.xml.sax.SAXException

  **For internal use only** Tell the user of an error, and probably throw an exception.
  Throws:
    XSLProcessorException - thrown if the active ProblemListener and XMLParserLiaison decide the error condition is severe enough to halt processing.

### error

    public void error(int msg,
                      java.lang.Object[] args)
               throws org.xml.sax.SAXException

  **For internal use only** Tell the user of an error, and probably throw an exception.
  Throws:
    XSLProcessorException - thrown if the active ProblemListener and XMLParserLiaison decide the error condition is severe enough to halt processing.

### error

    public void error(int msg,
                      java.lang.Exception e)
               throws org.xml.sax.SAXException

  **For internal use only** Tell the user of an error, and probably throw an exception.
  Throws:
    XSLProcessorException - thrown if the active ProblemListener and XMLParserLiaison decide the error condition is severe enough to halt processing.

### error

    public void error(int msg,
                      java.lang.Object[] args,
                      java.lang.Exception e)
               throws org.xml.sax.SAXException

  **For internal use only** Tell the user of an error, and probably throw an exception.
  Throws:
    XSLProcessorException - thrown if the active ProblemListener and XMLParserLiaison decide the error condition is severe enough to halt processing.

### error

    public void error(org.w3c.dom.Node styleNode,
                      org.w3c.dom.Node sourceNode,
                      int msg)
               throws org.xml.sax.SAXException

  **For internal use only** Tell the user of an error, and probably throw an exception.
  Throws:
    XSLProcessorException - thrown if the active ProblemListener and XMLParserLiaison decide the error condition is severe enough to halt processing.

### error

    public void error(org.w3c.dom.Node styleNode,
                      org.w3c.dom.Node sourceNode,
                      int msg,
                      java.lang.Object[] args)
               throws org.xml.sax.SAXException

  **For internal use only** Tell the user of an error, and probably throw an exception.
  Throws:
    XSLProcessorException - thrown if the active ProblemListener and XMLParserLiaison decide the error condition is severe enough to halt processing.

### setDiagnosticsOutput

    public void setDiagnosticsOutput(java.io.OutputStream out)

  **For advanced use only** If this is set, diagnostics will be written to the m_diagnosticsPrintWriter stream. If the value is null, then diagnostics will be turned off.
  Specified by:
    setDiagnosticsOutput in interface XSLTProcessor

### setDiagnosticsOutput

    public void setDiagnosticsOutput(java.io.PrintWriter pw)

  **For advanced use only** If this is set, diagnostics will be written to the m_diagnosticsPrintWriter stream. If the value is null, then diagnostics will be turned off.
  Specified by:
    setDiagnosticsOutput in interface XSLTProcessor

### setTraceTemplates

    public void setTraceTemplates(boolean b)

  **For advanced use only** If this is set to true, simple traces of template calls are made.
  Specified by:
    setTraceTemplates in interface XSLTProcessor

### setTraceSelect

    public void setTraceSelect(boolean b)

  **For advanced use only** If this is set to true, simple traces of template calls are made.
  Specified by:
    setTraceSelect in interface XSLTProcessor

### setTraceTemplateChildren

    public void setTraceTemplateChildren(boolean b)

  **For advanced use only** If this is set to true, debug diagnostics about template children as they are being constructed will be written to the m_diagnosticsPrintWriter stream. diagnoseTemplateChildren is false by default.
  Specified by:
    setTraceTemplateChildren in interface XSLTProcessor

### setQuietConflictWarnings

    public void setQuietConflictWarnings(boolean b)

  **For advanced use only** If the quietConflictWarnings property is set to true, warnings about pattern conflicts won't be printed to the diagnostics stream. True by default.
  Specified by:
    setQuietConflictWarnings in interface XSLTProcessor
  Parameters:
    `b` - true if conflict warnings should be suppressed.

### writeChildren

    public void writeChildren(org.xml.sax.DocumentHandler flistener,
                              Stylesheet stylesheetTree,
                              ElemTemplateElement templateParent,
                              org.w3c.dom.Node sourceTree,
                              org.w3c.dom.Node sourceNode,
                              QName mode)
                       throws org.xml.sax.SAXException,
                              java.net.MalformedURLException,
                              java.io.FileNotFoundException,
                              java.io.IOException

  **For internal use only** Write the children of a stylesheet element to the given listener.
  Parameters:
    `stylesheetTree` - The stylesheet object that holds the fragment.
    `templateParent` - The template element that holds the fragment.
    `sourceTree` - The source tree document context.
    `sourceNode` - The current source context node.
    `mode` - The mode under which the template is operating.
  Returns:
    An object that represents the result tree fragment.
  Throws:
    XSLProcessorException - thrown if the active ProblemListener and XMLParserLiaison decide the error condition is severe enough to halt processing.

### outputResultTreeFragment

    public void outputResultTreeFragment(XObject obj,
                                         XPathSupport support)
                                  throws org.xml.sax.SAXException,
                                         java.net.MalformedURLException,
                                         java.io.FileNotFoundException,
                                         java.io.IOException

  **For advanced use only** Given a result tree fragment, walk the tree and output it to the result stream.

### shouldStripSourceNode

    public boolean shouldStripSourceNode(org.w3c.dom.Node textNode)
                                  throws org.xml.sax.SAXException

  **For internal use only** Tells, through the combination of the default-space attribute on xsl:stylesheet, xsl:strip-space, xsl:preserve-space, and the xml:space attribute, whether or not extra whitespace should be stripped from the node. Literal elements from template elements should not be tested with this function.
  Specified by:
    shouldStripSourceNode in interface XPathEnvSupport
  Parameters:
    `textNode` - A text node from the source tree.
  Returns:
    true if the text node should be stripped of extra whitespace.

### getExecContext

    public XPathSupport getExecContext()

  **For advanced use only** Get the execution context for XPath.

### setExecContext

    public void setExecContext(XMLParserLiaison liaison)

  **For advanced use only** Set the execution context for XPath.

### getXMLProcessorLiaison

    public XMLParserLiaison getXMLProcessorLiaison()

  **For advanced use only** Get the XML Parser Liaison that this processor uses.
  Specified by:
    getXMLProcessorLiaison in interface XSLTProcessor

### createXString

    public XString createXString(java.lang.String s)

  **For advanced use only** Convenience function to create an XString.
  Specified by:
    createXString in interface XSLTProcessor
  Parameters:
    `s` - A valid string.
  Returns:
    An XString object.

### createXObject

    public XObject createXObject(java.lang.Object o)

  **For advanced use only** Convenience function to create an XObject.
  Specified by:
    createXObject in interface XSLTProcessor
  Parameters:
    `o` - Any java object.
  Returns:
    An XObject object.

### createXNumber

    public XNumber createXNumber(double d)

  **For advanced use only** Convenience function to create an XNumber.
  Specified by:
    createXNumber in interface XSLTProcessor
  Parameters:
    `d` - Any double number.
  Returns:
    An XNumber object.

### createXBoolean

    public XBoolean createXBoolean(boolean b)

  **For advanced use only** Convenience function to create an XBoolean.
  Specified by:
    createXBoolean in interface XSLTProcessor
  Parameters:
    `b` - boolean value.
  Returns:
    An XBoolean object.

### createXNodeSet

    public XNodeSet createXNodeSet(org.w3c.dom.NodeList nl)

  **For advanced use only** Convenience function to create an XNodeSet.
  Specified by:
    createXNodeSet in interface XSLTProcessor
  Parameters:
    `nl` - A NodeList object.
  Returns:
    An XNodeSet object.

### createXNodeSet

    public XNodeSet createXNodeSet(org.w3c.dom.Node n)

  **For advanced use only** Convenience function to create an XNodeSet from a node.
  Specified by:
    createXNodeSet in interface XSLTProcessor
  Parameters:
    `n` - A DOM node.
  Returns:
    An XNodeSet object.

### createXNull

    public XNull createXNull()

  **For advanced use only** Convenience function to create an XNull.
  Specified by:
    createXNull in interface XSLTProcessor
  Returns:
    An XNull object.

### getNodeSetByKey

    public org.w3c.dom.NodeList getNodeSetByKey(org.w3c.dom.Node doc,
                                                java.lang.String name,
                                                java.lang.String ref,
                                                PrefixResolver nscontext)
                                         throws org.xml.sax.SAXException

  **For advanced use only** Given a valid element key, return the corresponding node list.
  Specified by:
    getNodeSetByKey in interface XPathEnvSupport

### getVariable

    public XObject getVariable(QName qname)
                        throws org.xml.sax.SAXException

  **For advanced use only** Given a name, locate a variable in the current context, and return the Object.
  Specified by:
    getVariable in interface XPathEnvSupport

### getXLocatorFromNode

    public XLocator getXLocatorFromNode(org.w3c.dom.Node node)

  **For advanced use only** Get an XLocator provider keyed by node. This get's the association based on the root of the tree that the node is parented by.
  Specified by:
    getXLocatorFromNode in interface XPathEnvSupport

### associateXLocatorToNode

    public void associateXLocatorToNode(org.w3c.dom.Node node,
                                        XLocator xlocator)

  **For advanced use only** Associate an XLocator provider to a node. This makes the association based on the root of the tree that the node is parented by.
  Specified by:
    associateXLocatorToNode in interface XPathEnvSupport

### deassociateXLocatorToNode

    public void deassociateXLocatorToNode(org.w3c.dom.Node node)

  **For advanced use only** Deassociate an XLocator provider to a node. This makes the association based on the root of the tree that the node is parented by.
  Specified by:
    deassociateXLocatorToNode in interface XPathEnvSupport

### getStyleSheetURIfromDoc

    public java.lang.String getStyleSheetURIfromDoc(org.w3c.dom.Node sourceTree)

  Deprecated.
  **For advanced use only** Given a document, get the default stylesheet URI from the xsl:stylesheet PI. However, this will only get you the first URL, and there may be many.

### setStylesheetParam

    public void setStylesheetParam(java.lang.String key,
                                   java.lang.String expression)

  **For advanced use only** Push a top-level stylesheet parameter. This value can be evaluated via xsl:param-variable.
  Specified by:
    setStylesheetParam in interface XSLTProcessor
  Parameters:
    `key` - The name of the param.
    `expression` - An expression that will be evaluated.

### setStylesheetParam

    public void setStylesheetParam(java.lang.String key,
                                   XObject value)

  **For advanced use only** Push a top-level stylesheet parameter. This value can be evaluated via xsl:param-variable.
  Specified by:
    setStylesheetParam in interface XSLTProcessor
  Parameters:
    `key` - The name of the param.
    `value` - An XObject that will be used.

### getSourceNode

    public org.w3c.dom.Node getSourceNode()

  **For advanced use only** Returns the current input node that is being processed.

### getSourceNode

    public org.w3c.dom.Node getSourceNode(java.lang.String selectPattern,
                                          PrefixResolver namespaceContext)
                                   throws org.xml.sax.SAXException,
                                          java.net.MalformedURLException,
                                          java.io.FileNotFoundException,
                                          java.io.IOException

  **For advanced use only** Returns the current input node that is being processed.
  Throws:
    XSLProcessorException - thrown if the active ProblemListener and XMLParserLiaison decide the error condition is severe enough to halt processing.

### getDocumentHandler

    public org.xml.sax.DocumentHandler getDocumentHandler()

  **For advanced use only** Get the current DocumentHandler. This is the same object as the FormatterListener.
  Specified by:
    getDocumentHandler in interface XSLTProcessor

### setDocumentHandler

    public void setDocumentHandler(org.xml.sax.DocumentHandler listener)

  **For advanced use only** Set the current DocumentHandler. The object set is the same object as the FormatterListener.
  Specified by:
    setDocumentHandler in interface XSLTProcessor

### getFormatterListener

    public org.xml.sax.DocumentHandler getFormatterListener()

  **For advanced use only** Get the current formatter listener.
  Specified by:
    getFormatterListener in interface XSLTProcessor

### setFormatterListener

    public void setFormatterListener(org.xml.sax.DocumentHandler flistener)

  **For advanced use only** Set the current formatter listener.
  Specified by:
    setFormatterListener in interface XSLTProcessor

### setDOMFactory

    public void setDOMFactory(org.w3c.dom.Document doc)

  **For advanced use only** Set a DOM document factory, primarily for creating result tree fragments.
  Specified by:
    setDOMFactory in interface XPathEnvSupport

### getDOMFactory

    public org.w3c.dom.Document getDOMFactory()

  **For advanced use only** Get a DOM document, primarily for creating result tree fragments.
  Specified by:
    getDOMFactory in interface XPathEnvSupport

### setProblemListener

    public void setProblemListener(ProblemListener l)

  **For advanced use only** Set the problem listener property. The XSL class can have a single listener that can be informed of errors and warnings, and can normally control if an exception is thrown or not (or the problem listeners can throw their own RuntimeExceptions).
  Specified by:
    setProblemListener in interface XSLTProcessor
  Parameters:
    `l` - A ProblemListener interface.

### getProblemListener

    public ProblemListener getProblemListener()

  **For advanced use only** Get the problem listener property. The XSL class can have a single listener that can be informed of errors and warnings, and can normally control if an exception is thrown or not (or the problem listeners can throw their own RuntimeExceptions).
  Specified by:
    getProblemListener in interface XSLTProcessor
  Returns:
    A ProblemListener interface.

### setOutputStream

    public void setOutputStream(java.io.OutputStream os)

  **For advanced use only** Set the output stream that will be used. (This is only used, for the time being, when the processor is being used as a SAX Document handler!)
  Specified by:
    setOutputStream in interface XSLTProcessor

### setDocumentLocator

    public void setDocumentLocator(org.xml.sax.Locator locator)

  **For advanced use only** Implement the setDocumentLocator event.

### startDocument

    public void startDocument()
                       throws org.xml.sax.SAXException

  **For advanced use only** Implement the startDocument event.

### endDocument

    public void endDocument()
                     throws org.xml.sax.SAXException

  **For advanced use only** Implement the endDocument event.

### startElement

    public void startElement(java.lang.String name,
                             org.xml.sax.AttributeList atts)
                      throws org.xml.sax.SAXException

  **For advanced use only** Implement the startElement event.

### endElement

    public void endElement(java.lang.String name)
                    throws org.xml.sax.SAXException

  **For advanced use only** Implement the endElement event.

### startCDATA

    public void startCDATA()
                    throws org.xml.sax.SAXException

  **For advanced use only** Report the start of a CDATA section.

  The contents of the CDATA section will be reported through the regular characters event.

  Throws:
    org.xml.sax.SAXException - The application may raise an exception.
  See Also:
    `endCDATA()`

### endCDATA

    public void endCDATA()
                  throws org.xml.sax.SAXException

  **For advanced use only** Report the end of a CDATA section.
  Throws:
    org.xml.sax.SAXException - The application may raise an exception.
  See Also:
    `startCDATA()`

### characters

    public void characters(char[] ch,
                           int start,
                           int length)
                    throws org.xml.sax.SAXException

  **For advanced use only** Implement the characters event.

### charactersRaw

    public void charactersRaw(char[] ch,
                              int start,
                              int length)
                       throws org.xml.sax.SAXException

  **For advanced use only** Implement the characters event.

### ignorableWhitespace

    public void ignorableWhitespace(char[] ch,
                                    int start,
                                    int length)
                             throws org.xml.sax.SAXException

  **For advanced use only** Implement the ignorableWhitespace event.

### processingInstruction

    public void processingInstruction(java.lang.String target,
                                      java.lang.String data)
                               throws org.xml.sax.SAXException

  **For advanced use only** Implement the processingInstruction event.

### comment

    public void comment(char[] ch,
                        int start,
                        int length)
                 throws org.xml.sax.SAXException

  **For advanced use only** Report an XML comment anywhere in the document.

  This callback will be used for comments inside or outside the document element, including comments in the external DTD subset (if read).

  Parameters:
    `ch` - An array holding the characters in the comment.
    `start` - The starting position in the array.
    `length` - The number of characters to use from the array.
  Throws:
    org.xml.sax.SAXException - The application may raise an exception.

### startEntity

    public void startEntity(java.lang.String name)
                     throws org.xml.sax.SAXException

  **For advanced use only** Report the beginning of an entity.

  The start and end of the document entity are not reported. The start and end of the external DTD subset are reported using the pseudo-name "[dtd]". All other events must be properly nested within start/end entity events.

  Note that skipped entities will be reported through the skippedEntity event, which is part of the ContentHandler interface.

  Parameters:
    `name` - The name of the entity. If it is a parameter entity, the name will begin with '%'.
  Throws:
    org.xml.sax.SAXException - The application may raise an exception.
  See Also:
    `endEntity(java.lang.String)`, `DeclHandler.internalEntityDecl(java.lang.String, java.lang.String)`, `DeclHandler.externalEntityDecl(java.lang.String, java.lang.String, java.lang.String)`

### endEntity

    public void endEntity(java.lang.String name)
                   throws org.xml.sax.SAXException

  **For advanced use only** Report the end of an entity.
  Parameters:
    `name` - The name of the entity that is ending.
  Throws:
    org.xml.sax.SAXException - The application may raise an exception.
  See Also:
    `startEntity(java.lang.String)`

### startDTD

    public void startDTD(java.lang.String name,
                         java.lang.String publicId,
                         java.lang.String systemId)
                  throws org.xml.sax.SAXException

  **For advanced use only** Report the start of DTD declarations, if any.

  Any declarations are assumed to be in the internal subset unless otherwise indicated by a startEntity event.

  Parameters:
    `name` - The document type name.
    `publicId` - The declared public identifier for the external DTD subset, or null if none was declared.
    `systemId` - The declared system identifier for the external DTD subset, or null if none was declared.
  Throws:
    org.xml.sax.SAXException - The application may raise an exception.
  See Also:
    `endDTD()`, `startEntity(java.lang.String)`

### endDTD

    public void endDTD()
                throws org.xml.sax.SAXException

  **For advanced use only** Report the end of DTD declarations.
  Throws:
    org.xml.sax.SAXException - The application may raise an exception.
  See Also:
    `startDTD(java.lang.String, java.lang.String, java.lang.String)`

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