org.apache.cocoon.xml
Class RedundantNamespacesFilter

java.lang.Object
  org.apache.cocoon.util.AbstractLogEnabled
      org.apache.cocoon.xml.AbstractXMLProducer
          org.apache.cocoon.xml.AbstractXMLPipe
              org.apache.cocoon.xml.RedundantNamespacesFilter

All Implemented Interfaces:

ContentHandler, LexicalHandler, Poolable, Recyclable, XMLConsumer, org.apache.cocoon.xml.XMLConsumer, org.apache.cocoon.xml.XMLPipe, org.apache.cocoon.xml.XMLProducer

public class RedundantNamespacesFilter

extends org.apache.cocoon.xml.AbstractXMLPipe

A SAX filter that strips out redundant namespace declarations.

It handles both duplicate declarations (i.e. a namespace already declared by a parent element) and empty namespaces scopes (i.e. start/stopPrefixMapping with no element inbetween) that can be produced by some components (e.g. JXTG or BrowserUpdateTransformer). Such empty scopes confuse the Xalan serializer which then produces weird namespace declarations (xmlns:%@$#^@#="%@$#^@#").

This is a the most simple use of NamespacesTable.

Version:

$Id: RedundantNamespacesFilter.html 1304280 2012-03-23 11:18:01Z ilgrosso $

Field Summary

Fields inherited from class org.apache.cocoon.xml.AbstractXMLProducer

contentHandler, EMPTY_CONTENT_HANDLER, lexicalHandler, xmlConsumer

Constructor Summary

RedundantNamespacesFilter()
No-arg constructor.

RedundantNamespacesFilter(org.apache.cocoon.xml.XMLConsumer consumer)
Creates a filter directly linked to its consumer

Method Summary

void	endElement(String uri, String loc, String raw)
void	endPrefixMapping(String prefix)
void	startElement(String uri, String loc, String raw, Attributes a)
void	startPrefixMapping(String prefix, String uri)

Methods inherited from class org.apache.cocoon.xml.AbstractXMLPipe

characters, comment, endCDATA, endDocument, endDTD, endEntity, ignorableWhitespace, processingInstruction, setDocumentLocator, skippedEntity, startCDATA, startDocument, startDTD, startEntity

Methods inherited from class org.apache.cocoon.xml.AbstractXMLProducer

recycle, setConsumer, setContentHandler, setLexicalHandler

Methods inherited from class org.apache.cocoon.util.AbstractLogEnabled

getLogger, setLogger

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.cocoon.xml.XMLProducer

setConsumer

Constructor Detail

RedundantNamespacesFilter

public RedundantNamespacesFilter()

No-arg constructor. Requires an explicit call to setConsumer().

RedundantNamespacesFilter

public RedundantNamespacesFilter(org.apache.cocoon.xml.XMLConsumer consumer)

Creates a filter directly linked to its consumer

Parameters:

consumer - the SAX stream consumer

Method Detail

startPrefixMapping

public void startPrefixMapping(String prefix,
                               String uri)
                        throws SAXException

Throws:

SAXException

startElement

public void startElement(String uri,
                         String loc,
                         String raw,
                         Attributes a)
                  throws SAXException

Throws:

SAXException

endElement

public void endElement(String uri,
                       String loc,
                       String raw)
                throws SAXException

Throws:

SAXException

endPrefixMapping

public void endPrefixMapping(String prefix)
                      throws SAXException

Throws:

SAXException