net.metanotion.util
Class ContentHandlerStack

java.lang.Object
  net.metanotion.util.ContentHandlerStack

All Implemented Interfaces:

org.xml.sax.ContentHandler

public final class ContentHandlerStack
extends java.lang.Object
implements org.xml.sax.ContentHandler

This adds a "stack" like functionality on top of a normal SAX ContentHandler for namespaces and element closures. Synthesizing a stream of SAX events from a "hierarchy" of sources involves juggling namespaces, and potentially erroneous layers that will not properly close tags. Also, only 1 start and end document event should occur. This class provides a "stack" metaphor on top of another ContentHandler. push() preserves the current set of prefix mappings, and will ensure that "current" context will silently drop start/end Document calls, pop() restores the set of prefix mappings, and issues endElement events for any "dangling" tags.

Constructor Summary

ContentHandlerStack(org.xml.sax.ContentHandler ch)

Method Summary

void	characters(char[] ch, int start, int length)
void	endDocument()
void	endElement(java.lang.String uri, java.lang.String localName, java.lang.String qName)
void	endPrefixMapping(java.lang.String prefix)
void	ignorableWhitespace(char[] ch, int start, int length)
void	pop()
void	processingInstruction(java.lang.String target, java.lang.String data)
void	push()
void	setDocumentLocator(org.xml.sax.Locator locator)
void	skippedEntity(java.lang.String name)
void	startDocument()
void	startElement(java.lang.String uri, java.lang.String localName, java.lang.String qName, org.xml.sax.Attributes atts)
void	startPrefixMapping(java.lang.String prefix, java.lang.String uri)

Methods inherited from class java.lang.Object

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

Constructor Detail

ContentHandlerStack

public ContentHandlerStack(org.xml.sax.ContentHandler ch)

Method Detail

push

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

Throws:

org.xml.sax.SAXException

pop

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

Throws:

org.xml.sax.SAXException

endDocument

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

Specified by:

endDocument in interface org.xml.sax.ContentHandler

Throws:

org.xml.sax.SAXException

endElement

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

Specified by:

endElement in interface org.xml.sax.ContentHandler

Throws:

org.xml.sax.SAXException

endPrefixMapping

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

Specified by:

endPrefixMapping in interface org.xml.sax.ContentHandler

Throws:

org.xml.sax.SAXException

startDocument

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

Specified by:

startDocument in interface org.xml.sax.ContentHandler

Throws:

org.xml.sax.SAXException

startElement

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

Specified by:

startElement in interface org.xml.sax.ContentHandler

Throws:

org.xml.sax.SAXException

startPrefixMapping

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

Specified by:

startPrefixMapping in interface org.xml.sax.ContentHandler

Throws:

org.xml.sax.SAXException

characters

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

Specified by:

characters in interface org.xml.sax.ContentHandler

Throws:

org.xml.sax.SAXException

ignorableWhitespace

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

Specified by:

ignorableWhitespace in interface org.xml.sax.ContentHandler

Throws:

org.xml.sax.SAXException

processingInstruction

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

Specified by:

processingInstruction in interface org.xml.sax.ContentHandler

Throws:

org.xml.sax.SAXException

setDocumentLocator

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

Specified by:

setDocumentLocator in interface org.xml.sax.ContentHandler

skippedEntity

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

Specified by:

skippedEntity in interface org.xml.sax.ContentHandler

Throws:

org.xml.sax.SAXException