gate.xml
Class XmlDocumentHandler

java.lang.Object
  org.xml.sax.helpers.DefaultHandler
      gate.xml.XmlPositionCorrectionHandler
          gate.xml.XmlDocumentHandler

All Implemented Interfaces:

ContentHandler, DTDHandler, EntityResolver, ErrorHandler

public class XmlDocumentHandler
extends XmlPositionCorrectionHandler

Implements the behaviour of the XML reader Methods of an object of this class are called by the SAX parser when events will appear. The idea is to parse the XML document and construct Gate annotations objects. This class also will replace the content of the Gate document with a new one containing only text from the XML document.

Field Summary

protected int	customObjectsId This is used to generate unique Ids for the CustomObjects read
protected List	myStatusListeners Listeners for status report

Fields inherited from class gate.xml.XmlPositionCorrectionHandler

m_realOffset

Constructor Summary

XmlDocumentHandler(Document aDocument, Map aMarkupElementsMap, Map anElement2StringMap)
Constructs a XmlDocumentHandler object.

XmlDocumentHandler(Document aDocument, Map aMarkupElementsMap, Map anElement2StringMap, AnnotationSet anAnnotationSet)
Constructs a XmlDocumentHandler object.

Method Summary

void	addStatusListener(StatusListener listener) This methos is called when a listener is registered with this class
void	characters(char[] text, int start, int length) This method is called when the SAX parser encounts text in the XML doc.
void	charactersAction(char[] text, int start, int length) This method is called when all characters between specific tags have been read completely
void	comment(String text) This method is called when the SAX parser encounts a comment It works only if the XmlDocumentHandler implements a com.sun.parser.LexicalEventListener
void	endCDATA() This method is called when the SAX parser encounts the end of a CDATA section.
void	endDocument() This method is called when the SAX parser encounts the end of the XML document.
void	endElement(String uri, String qName, String elemName) This method is called when the SAX parser encounts the end of an XML element.
void	endParsedEntity(String name, boolean included) This method is called when the SAX parser encounts a parsed entity and informs the application if that entity was parsed or not It's working only if the CustomDocumentHandler implements a com.sun.parser.LexicalEventListener
void	error(SAXParseException ex) Error method.We deal with this exception inside SimpleErrorHandler class
void	fatalError(SAXParseException ex) FatalError method.
protected void	fireStatusChangedEvent(String text) This methos is called whenever we need to inform the listener about an event.
RepositioningInfo	getAmpCodingInfo() Return current RepositioningInfo object for ampersand coding.
int	getCustomObjectsId() Accesor method for the customObjectsId field
RepositioningInfo	getRepositioningInfo() Return current RepositioningInfo object
void	ignorableWhitespace(char[] ch, int start, int length) This method is called when the SAX parser encounts white spaces
void	removeStatusListener(StatusListener listener) This methos is called when a listener is removed
void	setAmpCodingInfo(RepositioningInfo info) Set repositioning information structure refference for ampersand coding.
void	setRepositioningInfo(RepositioningInfo info) Set repositioning information structure refference.
void	startCDATA() This method is called when the SAX parser encounts a start of a CDATA section It works only if the XmlDocumentHandler implements a com.sun.parser.LexicalEventListener
void	startDocument() This method is called when the SAX parser encounts the beginning of the XML document.
void	startElement(String uri, String qName, String elemName, Attributes atts) This method is called when the SAX parser encounts the beginning of an XML element.
void	startParsedEntity(String name) This method is called when the SAX parser encounts a parsed Entity It works only if the XmlDocumentHandler implements a com.sun.parser.LexicalEventListener
void	warning(SAXParseException ex) Warning method comment.

Methods inherited from class gate.xml.XmlPositionCorrectionHandler

getRealOffset

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

endPrefixMapping, notationDecl, processingInstruction, resolveEntity, setDocumentLocator, skippedEntity, startPrefixMapping, unparsedEntityDecl

Methods inherited from class java.lang.Object

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

Field Detail

myStatusListeners

protected List myStatusListeners

Listeners for status report

customObjectsId

protected int customObjectsId

This is used to generate unique Ids for the CustomObjects read

Constructor Detail

XmlDocumentHandler

public XmlDocumentHandler(Document aDocument,
                          Map aMarkupElementsMap,
                          Map anElement2StringMap)

Constructs a XmlDocumentHandler object. The annotationSet set will be the default one taken from the gate document.

Parameters:

aDocument - the Gate document that will be processed.

aMarkupElementsMap - this map contains the elements name that we want to create.

anElement2StringMap - this map contains the strings that will be added to the text contained by the key element.

XmlDocumentHandler

public XmlDocumentHandler(Document aDocument,
                          Map aMarkupElementsMap,
                          Map anElement2StringMap,
                          AnnotationSet anAnnotationSet)

Constructs a XmlDocumentHandler object.

Parameters:

aDocument - the Gate document that will be processed.

aMarkupElementsMap - this map contains the elements name that we want to create.

anElement2StringMap - this map contains the strings that will be added to the text contained by the key element.

anAnnotationSet - is the annotation set that will be filled when the document was processed

Method Detail

setRepositioningInfo

public void setRepositioningInfo(RepositioningInfo info)

Set repositioning information structure refference. If you set this refference to null information wouldn't be collected.

getRepositioningInfo

public RepositioningInfo getRepositioningInfo()

Return current RepositioningInfo object

setAmpCodingInfo

public void setAmpCodingInfo(RepositioningInfo info)

Set repositioning information structure refference for ampersand coding. If you set this refference to null information wouldn't be used.

getAmpCodingInfo

public RepositioningInfo getAmpCodingInfo()

Return current RepositioningInfo object for ampersand coding.

startDocument

public void startDocument()
                   throws SAXException

This method is called when the SAX parser encounts the beginning of the XML document.

Specified by:

startDocument in interface ContentHandler

Overrides:

startDocument in class XmlPositionCorrectionHandler

Throws:

SAXException

endDocument

public void endDocument()
                 throws SAXException

This method is called when the SAX parser encounts the end of the XML document. Here we set the content of the gate Document to be the one generated inside this class (tmpDocContent). After that we use the colector to generate all the annotation reffering this new gate document.

Specified by:

endDocument in interface ContentHandler

Overrides:

endDocument in class DefaultHandler

Throws:

SAXException

startElement

public void startElement(String uri,
                         String qName,
                         String elemName,
                         Attributes atts)
                  throws SAXException

This method is called when the SAX parser encounts the beginning of an XML element.

Specified by:

startElement in interface ContentHandler

Overrides:

startElement in class DefaultHandler

Throws:

SAXException

endElement

public void endElement(String uri,
                       String qName,
                       String elemName)
                throws SAXException

This method is called when the SAX parser encounts the end of an XML element. Here we extract

Specified by:

endElement in interface ContentHandler

Overrides:

endElement in class DefaultHandler

Throws:

SAXException

characters

public void characters(char[] text,
                       int start,
                       int length)
                throws SAXException

This method is called when the SAX parser encounts text in the XML doc. Here we calculate the end indices for all the elements present inside the stack and update with the new values. For entities, this method is called separatley regardless of the text sourinding the entity.

Specified by:

characters in interface ContentHandler

Overrides:

characters in class XmlPositionCorrectionHandler

Throws:

SAXException

charactersAction

public void charactersAction(char[] text,
                             int start,
                             int length)
                      throws SAXException

This method is called when all characters between specific tags have been read completely

Throws:

SAXException

ignorableWhitespace

public void ignorableWhitespace(char[] ch,
                                int start,
                                int length)
                         throws SAXException

This method is called when the SAX parser encounts white spaces

Specified by:

ignorableWhitespace in interface ContentHandler

Overrides:

ignorableWhitespace in class DefaultHandler

Throws:

SAXException

error

public void error(SAXParseException ex)
           throws SAXException

Error method.We deal with this exception inside SimpleErrorHandler class

Specified by:

error in interface ErrorHandler

Overrides:

error in class DefaultHandler

Throws:

SAXException

fatalError

public void fatalError(SAXParseException ex)
                throws SAXException

FatalError method.

Specified by:

fatalError in interface ErrorHandler

Overrides:

fatalError in class DefaultHandler

Throws:

SAXException

warning

public void warning(SAXParseException ex)
             throws SAXException

Warning method comment.

Specified by:

warning in interface ErrorHandler

Overrides:

warning in class DefaultHandler

Throws:

SAXException

comment

public void comment(String text)
             throws SAXException

This method is called when the SAX parser encounts a comment It works only if the XmlDocumentHandler implements a com.sun.parser.LexicalEventListener

Throws:

SAXException

startCDATA

public void startCDATA()
                throws SAXException

This method is called when the SAX parser encounts a start of a CDATA section It works only if the XmlDocumentHandler implements a com.sun.parser.LexicalEventListener

Throws:

SAXException

endCDATA

public void endCDATA()
              throws SAXException

This method is called when the SAX parser encounts the end of a CDATA section. It works only if the XmlDocumentHandler implements a com.sun.parser.LexicalEventListener

Throws:

SAXException

startParsedEntity

public void startParsedEntity(String name)
                       throws SAXException

This method is called when the SAX parser encounts a parsed Entity It works only if the XmlDocumentHandler implements a com.sun.parser.LexicalEventListener

Throws:

SAXException

endParsedEntity

public void endParsedEntity(String name,
                            boolean included)
                     throws SAXException

This method is called when the SAX parser encounts a parsed entity and informs the application if that entity was parsed or not It's working only if the CustomDocumentHandler implements a com.sun.parser.LexicalEventListener

Throws:

SAXException

addStatusListener

public void addStatusListener(StatusListener listener)

This methos is called when a listener is registered with this class

removeStatusListener

public void removeStatusListener(StatusListener listener)

This methos is called when a listener is removed

fireStatusChangedEvent

protected void fireStatusChangedEvent(String text)

This methos is called whenever we need to inform the listener about an event.

getCustomObjectsId

public int getCustomObjectsId()

Accesor method for the customObjectsId field