org.apache.xalan.transformer
Class TransformerHandlerImpl

java.lang.Object
  org.apache.xalan.transformer.TransformerHandlerImpl

All Implemented Interfaces:

org.xml.sax.ContentHandler, org.xml.sax.ext.DeclHandler, org.xml.sax.DTDHandler, org.xml.sax.EntityResolver, org.xml.sax.ErrorHandler, org.xml.sax.ext.LexicalHandler, javax.xml.transform.sax.TransformerHandler

public class TransformerHandlerImpl

extends Object

implements org.xml.sax.EntityResolver, org.xml.sax.DTDHandler, org.xml.sax.ContentHandler, org.xml.sax.ErrorHandler, org.xml.sax.ext.LexicalHandler, javax.xml.transform.sax.TransformerHandler, org.xml.sax.ext.DeclHandler

A TransformerHandler listens for SAX ContentHandler parse events and transforms them to a Result.

Field Summary

private static boolean	DEBUG Set to true for diagnostics output.
private String	m_baseSystemID The system ID to use as a base for relative URLs.
private org.xml.sax.ContentHandler	m_contentHandler The content handler to aggregate to.
private org.xml.sax.ext.DeclHandler	m_declHandler The decl handler to aggregate to.
private org.xml.sax.DTDHandler	m_dtdHandler The DTD handler to aggregate to.
(package private) DTM	m_dtm The Document Table Instance we are transforming.
private org.xml.sax.EntityResolver	m_entityResolver The entity resolver to aggregate to.
private org.xml.sax.ErrorHandler	m_errorHandler The error handler to aggregate to.
private boolean	m_insideParse
private org.xml.sax.ext.LexicalHandler	m_lexicalHandler The lexical handler to aggregate to.
private org.xml.sax.Locator	m_locator The locator for this TransformerHandler.
private javax.xml.transform.Result	m_result The result for the transformation.
private TransformerImpl	m_transformer The transformer this will use to transform a source tree into a result tree.

Constructor Summary

TransformerHandlerImpl(TransformerImpl transformer, boolean doFragment, String baseSystemID)
Construct a TransformerHandlerImpl.

Method Summary

void	attributeDecl(String eName, String aName, String type, String valueDefault, String value) Report an attribute type declaration.
void	characters(char[] ch, int start, int length) Filter a character data event.
protected void	clearCoRoutine() Do what needs to be done to shut down the CoRoutine management.
protected void	clearCoRoutine(org.xml.sax.SAXException ex) Do what needs to be done to shut down the CoRoutine management.
void	comment(char[] ch, int start, int length) Report an XML comment anywhere in the document.
void	elementDecl(String name, String model) Report an element type declaration.
void	endCDATA() Report the end of a CDATA section.
void	endDocument() Filter an end document event.
void	endDTD() Report the end of DTD declarations.
void	endElement(String uri, String localName, String qName) Filter an end element event.
void	endEntity(String name) Report the end of an entity.
void	endPrefixMapping(String prefix) Filter an end Namespace prefix mapping event.
void	error(org.xml.sax.SAXParseException e) Filter an error event.
void	externalEntityDecl(String name, String publicId, String systemId) Report a parsed external entity declaration.
void	fatalError(org.xml.sax.SAXParseException e) Filter a fatal error event.
String	getSystemId() Get the base ID (URI or system ID) from where relative URLs will be resolved.
javax.xml.transform.Transformer	getTransformer() Get the Transformer associated with this handler, which is needed in order to set parameters and output properties.
void	ignorableWhitespace(char[] ch, int start, int length) Filter an ignorable whitespace event.
void	internalEntityDecl(String name, String value) Report an internal entity declaration.
void	notationDecl(String name, String publicId, String systemId) Filter a notation declaration event.
void	processingInstruction(String target, String data) Filter a processing instruction event.
org.xml.sax.InputSource	resolveEntity(String publicId, String systemId) Filter an external entity resolution.
void	setDocumentLocator(org.xml.sax.Locator locator) Filter a new document locator event.
void	setResult(javax.xml.transform.Result result) Enables the user of the TransformerHandler to set the to set the Result for the transformation.
void	setSystemId(String systemID) Set the base ID (URI or system ID) from where relative URLs will be resolved.
void	skippedEntity(String name) Filter a skipped entity event.
void	startCDATA() Report the start of a CDATA section.
void	startDocument() Filter a start document event.
void	startDTD(String name, String publicId, String systemId) Report the start of DTD declarations, if any.
void	startElement(String uri, String localName, String qName, org.xml.sax.Attributes atts) Filter a start element event.
void	startEntity(String name) Report the beginning of an entity in content.
void	startPrefixMapping(String prefix, String uri) Filter a start Namespace prefix mapping event.
void	unparsedEntityDecl(String name, String publicId, String systemId, String notationName) Filter an unparsed entity declaration event.
void	warning(org.xml.sax.SAXParseException e) Filter a warning event.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

m_insideParse

private boolean m_insideParse

DEBUG

private static boolean DEBUG

Set to true for diagnostics output.

m_transformer

private TransformerImpl m_transformer

The transformer this will use to transform a source tree into a result tree.

m_baseSystemID

private String m_baseSystemID

The system ID to use as a base for relative URLs.

m_result

private javax.xml.transform.Result m_result

The result for the transformation.

m_locator

private org.xml.sax.Locator m_locator

The locator for this TransformerHandler.

m_entityResolver

private org.xml.sax.EntityResolver m_entityResolver

The entity resolver to aggregate to.

m_dtdHandler

private org.xml.sax.DTDHandler m_dtdHandler

The DTD handler to aggregate to.

m_contentHandler

private org.xml.sax.ContentHandler m_contentHandler

The content handler to aggregate to.

m_errorHandler

private org.xml.sax.ErrorHandler m_errorHandler

The error handler to aggregate to.

m_lexicalHandler

private org.xml.sax.ext.LexicalHandler m_lexicalHandler

The lexical handler to aggregate to.

m_declHandler

private org.xml.sax.ext.DeclHandler m_declHandler

The decl handler to aggregate to.

m_dtm

DTM m_dtm

The Document Table Instance we are transforming.

Constructor Detail

TransformerHandlerImpl

public TransformerHandlerImpl(TransformerImpl transformer,
                              boolean doFragment,
                              String baseSystemID)

Construct a TransformerHandlerImpl.

Parameters:

transformer - Non-null reference to the Xalan transformer impl.

doFragment - True if the result should be a document fragement.

baseSystemID - The system ID to use as the base for relative URLs.

Method Detail

clearCoRoutine

protected void clearCoRoutine()

Do what needs to be done to shut down the CoRoutine management.

clearCoRoutine

protected void clearCoRoutine(org.xml.sax.SAXException ex)

Do what needs to be done to shut down the CoRoutine management.

setResult

public void setResult(javax.xml.transform.Result result)
               throws IllegalArgumentException

Enables the user of the TransformerHandler to set the to set the Result for the transformation.

Specified by:

setResult in interface javax.xml.transform.sax.TransformerHandler

Parameters:

result - A Result instance, should not be null.

Throws:

IllegalArgumentException - if result is invalid for some reason.

setSystemId

public void setSystemId(String systemID)

Set the base ID (URI or system ID) from where relative URLs will be resolved.

Specified by:

setSystemId in interface javax.xml.transform.sax.TransformerHandler

Parameters:

systemID - Base URI for the source tree.

getSystemId

public String getSystemId()

Get the base ID (URI or system ID) from where relative URLs will be resolved.

Specified by:

getSystemId in interface javax.xml.transform.sax.TransformerHandler

Returns:

The systemID that was set with setSystemId(java.lang.String).

getTransformer

public javax.xml.transform.Transformer getTransformer()

Get the Transformer associated with this handler, which is needed in order to set parameters and output properties.

Specified by:

getTransformer in interface javax.xml.transform.sax.TransformerHandler

Returns:

The Transformer associated with this handler

resolveEntity

public org.xml.sax.InputSource resolveEntity(String publicId,
                                             String systemId)
                                      throws org.xml.sax.SAXException,
                                             IOException

Filter an external entity resolution.

Specified by:

resolveEntity in interface org.xml.sax.EntityResolver

Parameters:

publicId - The entity's public identifier, or null.

systemId - The entity's system identifier.

Returns:

A new InputSource or null for the default.

Throws:

IOException

org.xml.sax.SAXException - The client may throw an exception during processing.

IOException - The client may throw an I/O-related exception while obtaining the new InputSource.

See Also:

EntityResolver.resolveEntity(java.lang.String, java.lang.String)

notationDecl

public void notationDecl(String name,
                         String publicId,
                         String systemId)
                  throws org.xml.sax.SAXException

Filter a notation declaration event.

Specified by:

notationDecl in interface org.xml.sax.DTDHandler

Parameters:

name - The notation name.

publicId - The notation's public identifier, or null.

systemId - The notation's system identifier, or null.

Throws:

org.xml.sax.SAXException - The client may throw an exception during processing.

See Also:

DTDHandler.notationDecl(java.lang.String, java.lang.String, java.lang.String)

unparsedEntityDecl

public void unparsedEntityDecl(String name,
                               String publicId,
                               String systemId,
                               String notationName)
                        throws org.xml.sax.SAXException

Filter an unparsed entity declaration event.

Specified by:

unparsedEntityDecl in interface org.xml.sax.DTDHandler

Parameters:

name - The entity name.

publicId - The entity's public identifier, or null.

systemId - The entity's system identifier, or null.

notationName - The name of the associated notation.

Throws:

org.xml.sax.SAXException - The client may throw an exception during processing.

See Also:

DTDHandler.unparsedEntityDecl(java.lang.String, java.lang.String, java.lang.String, java.lang.String)

setDocumentLocator

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

Filter a new document locator event.

Specified by:

setDocumentLocator in interface org.xml.sax.ContentHandler

Parameters:

locator - The document locator.

See Also:

ContentHandler.setDocumentLocator(org.xml.sax.Locator)

startDocument

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

Filter a start document event.

Specified by:

startDocument in interface org.xml.sax.ContentHandler

Throws:

org.xml.sax.SAXException - The client may throw an exception during processing.

See Also:

ContentHandler.startDocument()

endDocument

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

Filter an end document event.

Specified by:

endDocument in interface org.xml.sax.ContentHandler

Throws:

org.xml.sax.SAXException - The client may throw an exception during processing.

See Also:

ContentHandler.endDocument()

startPrefixMapping

public void startPrefixMapping(String prefix,
                               String uri)
                        throws org.xml.sax.SAXException

Filter a start Namespace prefix mapping event.

Specified by:

startPrefixMapping in interface org.xml.sax.ContentHandler

Parameters:

prefix - The Namespace prefix.

uri - The Namespace URI.

Throws:

org.xml.sax.SAXException - The client may throw an exception during processing.

See Also:

ContentHandler.startPrefixMapping(java.lang.String, java.lang.String)

endPrefixMapping

public void endPrefixMapping(String prefix)
                      throws org.xml.sax.SAXException

Filter an end Namespace prefix mapping event.

Specified by:

endPrefixMapping in interface org.xml.sax.ContentHandler

Parameters:

prefix - The Namespace prefix.

Throws:

org.xml.sax.SAXException - The client may throw an exception during processing.

See Also:

ContentHandler.endPrefixMapping(java.lang.String)

startElement

public void startElement(String uri,
                         String localName,
                         String qName,
                         org.xml.sax.Attributes atts)
                  throws org.xml.sax.SAXException

Filter a start element event.

Specified by:

startElement in interface org.xml.sax.ContentHandler

Parameters:

uri - The element's Namespace URI, or the empty string.

localName - The element's local name, or the empty string.

qName - The element's qualified (prefixed) name, or the empty string.

atts - The element's attributes.

Throws:

org.xml.sax.SAXException - The client may throw an exception during processing.

See Also:

ContentHandler.startElement(java.lang.String, java.lang.String, java.lang.String, org.xml.sax.Attributes)

endElement

public void endElement(String uri,
                       String localName,
                       String qName)
                throws org.xml.sax.SAXException

Filter an end element event.

Specified by:

endElement in interface org.xml.sax.ContentHandler

Parameters:

uri - The element's Namespace URI, or the empty string.

localName - The element's local name, or the empty string.

qName - The element's qualified (prefixed) name, or the empty string.

Throws:

org.xml.sax.SAXException - The client may throw an exception during processing.

See Also:

ContentHandler.endElement(java.lang.String, java.lang.String, java.lang.String)

characters

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

Filter a character data event.

Specified by:

characters in interface org.xml.sax.ContentHandler

Parameters:

ch - An array of characters.

start - The starting position in the array.

length - The number of characters to use from the array.

Throws:

org.xml.sax.SAXException - The client may throw an exception during processing.

See Also:

ContentHandler.characters(char[], int, int)

ignorableWhitespace

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

Filter an ignorable whitespace event.

Specified by:

ignorableWhitespace in interface org.xml.sax.ContentHandler

Parameters:

ch - An array of characters.

start - The starting position in the array.

length - The number of characters to use from the array.

Throws:

org.xml.sax.SAXException - The client may throw an exception during processing.

See Also:

ContentHandler.ignorableWhitespace(char[], int, int)

processingInstruction

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

Filter a processing instruction event.

Specified by:

processingInstruction in interface org.xml.sax.ContentHandler

Parameters:

target - The processing instruction target.

data - The text following the target.

Throws:

org.xml.sax.SAXException - The client may throw an exception during processing.

See Also:

ContentHandler.processingInstruction(java.lang.String, java.lang.String)

skippedEntity

public void skippedEntity(String name)
                   throws org.xml.sax.SAXException

Filter a skipped entity event.

Specified by:

skippedEntity in interface org.xml.sax.ContentHandler

Parameters:

name - The name of the skipped entity.

Throws:

org.xml.sax.SAXException - The client may throw an exception during processing.

See Also:

ContentHandler.skippedEntity(java.lang.String)

warning

public void warning(org.xml.sax.SAXParseException e)
             throws org.xml.sax.SAXException

Filter a warning event.

Specified by:

warning in interface org.xml.sax.ErrorHandler

Parameters:

e - The nwarning as an exception.

Throws:

org.xml.sax.SAXException - The client may throw an exception during processing.

See Also:

ErrorHandler.warning(org.xml.sax.SAXParseException)

error

public void error(org.xml.sax.SAXParseException e)
           throws org.xml.sax.SAXException

Filter an error event.

Specified by:

error in interface org.xml.sax.ErrorHandler

Parameters:

e - The error as an exception.

Throws:

org.xml.sax.SAXException - The client may throw an exception during processing.

See Also:

ErrorHandler.error(org.xml.sax.SAXParseException)

fatalError

public void fatalError(org.xml.sax.SAXParseException e)
                throws org.xml.sax.SAXException

Filter a fatal error event.

Specified by:

fatalError in interface org.xml.sax.ErrorHandler

Parameters:

e - The error as an exception.

Throws:

org.xml.sax.SAXException - The client may throw an exception during processing.

See Also:

ErrorHandler.fatalError(org.xml.sax.SAXParseException)

startDTD

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

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.

Note that the start/endDTD events will appear within the start/endDocument events from ContentHandler and before the first startElement event.

Specified by:

startDTD in interface org.xml.sax.ext.LexicalHandler

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

Report the end of DTD declarations.

Specified by:

endDTD in interface org.xml.sax.ext.LexicalHandler

Throws:

org.xml.sax.SAXException - The application may raise an exception.

See Also:

startDTD(java.lang.String, java.lang.String, java.lang.String)

startEntity

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

Report the beginning of an entity in content.

NOTE: entity references in attribute values -- and the start and end of the document entity -- are never 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.

Specified by:

startEntity in interface org.xml.sax.ext.LexicalHandler

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(String name)
               throws org.xml.sax.SAXException

Report the end of an entity.

Specified by:

endEntity in interface org.xml.sax.ext.LexicalHandler

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)

startCDATA

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

Report the start of a CDATA section.

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

Specified by:

startCDATA in interface org.xml.sax.ext.LexicalHandler

Throws:

org.xml.sax.SAXException - The application may raise an exception.

See Also:

endCDATA()

endCDATA

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

Report the end of a CDATA section.

Specified by:

endCDATA in interface org.xml.sax.ext.LexicalHandler

Throws:

org.xml.sax.SAXException - The application may raise an exception.

See Also:

startCDATA()

comment

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

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).

Specified by:

comment in interface org.xml.sax.ext.LexicalHandler

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.

elementDecl

public void elementDecl(String name,
                        String model)
                 throws org.xml.sax.SAXException

Report an element type declaration.

The content model will consist of the string "EMPTY", the string "ANY", or a parenthesised group, optionally followed by an occurrence indicator. The model will be normalized so that all whitespace is removed,and will include the enclosing parentheses.

Specified by:

elementDecl in interface org.xml.sax.ext.DeclHandler

Parameters:

name - The element type name.

model - The content model as a normalized string.

Throws:

org.xml.sax.SAXException - The application may raise an exception.

attributeDecl

public void attributeDecl(String eName,
                          String aName,
                          String type,
                          String valueDefault,
                          String value)
                   throws org.xml.sax.SAXException

Report an attribute type declaration.

Only the effective (first) declaration for an attribute will be reported. The type will be one of the strings "CDATA", "ID", "IDREF", "IDREFS", "NMTOKEN", "NMTOKENS", "ENTITY", "ENTITIES", or "NOTATION", or a parenthesized token group with the separator "|" and all whitespace removed.

Specified by:

attributeDecl in interface org.xml.sax.ext.DeclHandler

Parameters:

eName - The name of the associated element.

aName - The name of the attribute.

type - A string representing the attribute type.

valueDefault - A string representing the attribute default ("#IMPLIED", "#REQUIRED", or "#FIXED") or null if none of these applies.

value - A string representing the attribute's default value, or null if there is none.

Throws:

org.xml.sax.SAXException - The application may raise an exception.

internalEntityDecl

public void internalEntityDecl(String name,
                               String value)
                        throws org.xml.sax.SAXException

Report an internal entity declaration.

Only the effective (first) declaration for each entity will be reported.

Specified by:

internalEntityDecl in interface org.xml.sax.ext.DeclHandler

Parameters:

name - The name of the entity. If it is a parameter entity, the name will begin with '%'.

value - The replacement text of the entity.

Throws:

org.xml.sax.SAXException - The application may raise an exception.

See Also:

externalEntityDecl(java.lang.String, java.lang.String, java.lang.String), DTDHandler.unparsedEntityDecl(java.lang.String, java.lang.String, java.lang.String, java.lang.String)

externalEntityDecl

public void externalEntityDecl(String name,
                               String publicId,
                               String systemId)
                        throws org.xml.sax.SAXException

Report a parsed external entity declaration.

Only the effective (first) declaration for each entity will be reported.

Specified by:

externalEntityDecl in interface org.xml.sax.ext.DeclHandler

Parameters:

name - The name of the entity. If it is a parameter entity, the name will begin with '%'.

publicId - The declared public identifier of the entity, or null if none was declared.

systemId - The declared system identifier of the entity.

Throws:

org.xml.sax.SAXException - The application may raise an exception.

See Also:

internalEntityDecl(java.lang.String, java.lang.String), DTDHandler.unparsedEntityDecl(java.lang.String, java.lang.String, java.lang.String, java.lang.String)