org.apache.xml.dtm.ref
Class IncrementalSAXSource_Xerces

java.lang.Object
  |
  +--org.apache.xml.dtm.ref.IncrementalSAXSource_Xerces

public class IncrementalSAXSource_Xerces

extends java.lang.Object

implements IncrementalSAXSource

IncrementalSAXSource_Xerces takes advantage of the fact that Xerces1 incremental mode is already a coroutine of sorts, and just wraps our IncrementalSAXSource API around it.

Usage example: See main().

Status: Passes simple main() unit-test. NEEDS JAVADOC.

Constructor Summary

IncrementalSAXSource_Xerces()
Create a IncrementalSAXSource_Xerces, and create a SAXParser to go with it.

IncrementalSAXSource_Xerces(org.apache.xerces.parsers.SAXParser parser)
Create a IncrementalSAXSource_Xerces wrapped around an existing SAXParser.

Method Summary

static IncrementalSAXSource	createIncrementalSAXSource()
static IncrementalSAXSource	createIncrementalSAXSource(org.apache.xerces.parsers.SAXParser parser)
java.lang.Object	deliverMoreNodes(boolean parsemore) deliverMoreNodes() is a simple API which tells the coroutine parser that we need more nodes.
static void	main(java.lang.String[] args) Simple unit test.
void	setContentHandler(ContentHandler handler)
void	setDTDHandler(DTDHandler handler)
void	setLexicalHandler(LexicalHandler handler)
void	startParse(InputSource source) startParse() is a simple API which tells the IncrementalSAXSource to begin reading a document.

Methods inherited from class java.lang.Object

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

Constructor Detail

IncrementalSAXSource_Xerces

public IncrementalSAXSource_Xerces()
                            throws java.lang.NoSuchMethodException

Create a IncrementalSAXSource_Xerces, and create a SAXParser to go with it. Xerces2 incremental parsing is only supported if this constructor is used, due to limitations in the Xerces2 API (as of Beta 3). If you don't like that restriction, tell the Xerces folks that there should be a simpler way to request incremental SAX parsing.

IncrementalSAXSource_Xerces

public IncrementalSAXSource_Xerces(org.apache.xerces.parsers.SAXParser parser)
                            throws java.lang.NoSuchMethodException

Create a IncrementalSAXSource_Xerces wrapped around an existing SAXParser. Currently this works only for recent releases of Xerces-1. Xerces-2 incremental is currently possible only if we are allowed to create the parser instance, due to limitations in the API exposed by Xerces-2 Beta 3; see the no-args constructor for that code.

Throws:

if - the SAXParser class doesn't support the Xerces incremental parse operations. In that case, caller should fall back upon the IncrementalSAXSource_Filter approach.

Method Detail

createIncrementalSAXSource

public static IncrementalSAXSource createIncrementalSAXSource()

createIncrementalSAXSource

public static IncrementalSAXSource createIncrementalSAXSource(org.apache.xerces.parsers.SAXParser parser)

setContentHandler

public void setContentHandler(ContentHandler handler)

Specified by:

setContentHandler in interface IncrementalSAXSource

setLexicalHandler

public void setLexicalHandler(LexicalHandler handler)

Specified by:

setLexicalHandler in interface IncrementalSAXSource

setDTDHandler

public void setDTDHandler(DTDHandler handler)

Specified by:

setDTDHandler in interface IncrementalSAXSource

startParse

public void startParse(InputSource source)
                throws SAXException

startParse() is a simple API which tells the IncrementalSAXSource to begin reading a document.

Specified by:

startParse in interface IncrementalSAXSource

Throws:

SAXException - is parse thread is already in progress or parsing can not be started.

deliverMoreNodes

public java.lang.Object deliverMoreNodes(boolean parsemore)

deliverMoreNodes() is a simple API which tells the coroutine parser that we need more nodes. This is intended to be called from one of our partner routines, and serves to encapsulate the details of how incremental parsing has been achieved.

Specified by:

deliverMoreNodes in interface IncrementalSAXSource

Parameters:

parsemore - If true, tells the incremental parser to generate another chunk of output. If false, tells the parser that we're satisfied and it can terminate parsing of this document.

Returns:

Boolean.TRUE if the CoroutineParser believes more data may be available for further parsing. Boolean.FALSE if parsing ran to completion. Exception if the parser objected for some reason.

main

public static void main(java.lang.String[] args)

Simple unit test. Attempt coroutine parsing of document indicated by first argument (as a URI), report progress.