gate.xml

Class XmlPositionCorrectionHandler

java.lang.Object

org.xml.sax.helpers.DefaultHandler

gate.xml.XmlPositionCorrectionHandler

All Implemented Interfaces:

ContentHandler, DTDHandler, EntityResolver, ErrorHandler

Direct Known Subclasses:

XmlDocumentHandler

public class XmlPositionCorrectionHandler
extends DefaultHandler

This class correct a Xerces parser bug in reported position in file during the parsing process. Xerces parser cut processed file to 16K peaces. If the parser cross the 16K border reported in the characters() position is zerro. This bug could be covered if you extend this content handler instead of org.xml.sax.helpers.DefaultHandler. The real content handler should call methods startDocument() and characters() in order to compute correct position in file. The corrected position could be received throug protected data member m_realOffset or with getRealOffset().

Field Summary

Fields

Modifier and Type	Field and Description
protected long	m_realOffset Variables for correction of 16K parser limit for offset

Constructor Summary

Constructors

Constructor and Description
XmlPositionCorrectionHandler() Constructor for initialization of variables

Method Summary

Methods

Modifier and Type	Method and Description
void	characters(char[] text, int offset, int len) Here is the correction of the Xerces parser bug.
long	getRealOffset() Return corrected offset for last characters() call
void	startDocument() Initialization of variables on start of document parsing

Methods inherited from class org.xml.sax.helpers.DefaultHandler

endDocument, endElement, endPrefixMapping, error, fatalError, ignorableWhitespace, notationDecl, processingInstruction, resolveEntity, setDocumentLocator, skippedEntity, startElement, startPrefixMapping, unparsedEntityDecl, warning

Methods inherited from class java.lang.Object

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

Field Detail

m_realOffset

protected long m_realOffset

Variables for correction of 16K parser limit for offset

Constructor Detail

XmlPositionCorrectionHandler

public XmlPositionCorrectionHandler()

Constructor for initialization of variables

Method Detail

startDocument

public void startDocument()
                   throws SAXException

Initialization of variables on start of document parsing

Specified by:

startDocument in interface ContentHandler

Overrides:

startDocument in class DefaultHandler

Throws:

SAXException

getRealOffset

public long getRealOffset()

Return corrected offset for last characters() call

characters

public void characters(char[] text,
              int offset,
              int len)
                throws SAXException

Here is the correction of the Xerces parser bug.

Specified by:

characters in interface ContentHandler

Overrides:

characters in class DefaultHandler

Throws:

SAXException