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org.apache.cocoon.transformation
Class FragmentExtractorTransformer

java.lang.Object
  org.apache.avalon.framework.logger.AbstractLogEnabled
      org.apache.cocoon.xml.AbstractXMLProducer
          org.apache.cocoon.xml.AbstractXMLPipe
              org.apache.cocoon.transformation.AbstractTransformer
                  org.apache.cocoon.transformation.FragmentExtractorTransformer

All Implemented Interfaces:

Poolable, Recyclable, Disposable, Component, Configurable, LogEnabled, Serviceable, CacheableProcessingComponent, SitemapModelComponent, Transformer, XMLPipe, XMLProducer, XMLConsumer, ContentHandler, LexicalHandler

public class FragmentExtractorTransformer
extends AbstractTransformer
implements CacheableProcessingComponent, Configurable, Serviceable, Disposable

The transformation half of the FragmentExtractor. This transformer recieves an incoming stream of xml and replaces fragments with an fragment extractor locator pointing to the fragments. The extracted fragments are identified by their element name and namespace URI. The default is to extract SVG images ("svg" elements in namespace "http://www.w3.org/2000/svg"), but this can be overriden in the configuration:

   <extract-uri>http://my/namespace/uri</extract-uri>
   <extract-element>my-element</extract-element>
 

Fragment extractor locator format is following:

   <fe:fragment xmlns:fe="http://apache.org/cocoon/fragmentextractor/2.0" fragment-id="..."/>
 

Version:

CVS $Id: FragmentExtractorTransformer.html 1304258 2012-03-23 10:09:27Z ilgrosso $

Author:

Paul Russell

Field Summary

static String	FE_URI
protected ServiceManager	manager The ServiceManager instance

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

contentHandler, EMPTY_CONTENT_HANDLER, lexicalHandler, xmlConsumer

Fields inherited from interface org.apache.cocoon.transformation.Transformer

ROLE

Constructor Summary

FragmentExtractorTransformer()

Method Summary

void	characters(char[] c, int start, int len) Receive notification of character data.
void	comment(char[] ch, int start, int len) Report an XML comment anywhere in the document.
void	configure(Configuration conf) Configure this transformer.
void	dispose() Release all resources.
void	endCDATA() Report the end of a CDATA section.
void	endDTD() Report the end of DTD declarations.
void	endElement(String uri, String loc, String raw) Receive notification of the end of an element.
void	endEntity(String name) Report the end of an entity.
void	endPrefixMapping(String prefix) End the scope of a prefix-URI mapping.
Serializable	getKey() Generate the unique key.
SourceValidity	getValidity() Generate the validity object.
void	ignorableWhitespace(char[] c, int start, int len) Receive notification of ignorable whitespace in element content.
void	processingInstruction(String target, String data) Receive notification of a processing instruction.
void	recycle() Recycle this component
void	service(ServiceManager manager) Set the current ServiceManager instance used by this Serviceable.
void	setup(SourceResolver resolver, Map objectModel, String src, Parameters parameters) Setup the transformer.
void	skippedEntity(String name) Receive notification of a skipped entity.
void	startCDATA() Report the start of a CDATA section.
void	startDTD(String name, String publicId, String systemId) Report the start of DTD declarations, if any.
void	startElement(String uri, String loc, String raw, Attributes a) Receive notification of the beginning of an element.
void	startEntity(String name) Report the beginning of an entity.
void	startPrefixMapping(String prefix, String uri) Begin the scope of a prefix-URI Namespace mapping.

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

endDocument, setDocumentLocator, startDocument

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

setConsumer, setContentHandler, setLexicalHandler

Methods inherited from class org.apache.avalon.framework.logger.AbstractLogEnabled

enableLogging, getLogger, setupLogger, setupLogger, setupLogger

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.xml.sax.ContentHandler

endDocument, setDocumentLocator, startDocument

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

setConsumer

Field Detail

FE_URI

public static final String FE_URI

See Also:

Constant Field Values

manager

protected ServiceManager manager

The ServiceManager instance

Constructor Detail

FragmentExtractorTransformer

public FragmentExtractorTransformer()

Method Detail

configure

public void configure(Configuration conf)
               throws ConfigurationException

Configure this transformer.

Specified by:

configure in interface Configurable

Throws:

ConfigurationException

service

public void service(ServiceManager manager)
             throws ServiceException

Set the current ServiceManager instance used by this Serviceable.

Specified by:

service in interface Serviceable

Throws:

ServiceException

recycle

public void recycle()

Recycle this component

Specified by:

recycle in interface Recyclable

Overrides:

recycle in class AbstractXMLProducer

dispose

public void dispose()

Release all resources.

Specified by:

dispose in interface Disposable

setup

public void setup(SourceResolver resolver,
                  Map objectModel,
                  String src,
                  Parameters parameters)
           throws ProcessingException,
                  SAXException,
                  IOException

Setup the transformer.

Specified by:

setup in interface SitemapModelComponent

Throws:

ProcessingException

SAXException

IOException

getKey

public Serializable getKey()

Generate the unique key. This key must be unique inside the space of this component.

Specified by:

getKey in interface CacheableProcessingComponent

Returns:

"1"

getValidity

public SourceValidity getValidity()

Generate the validity object.

Specified by:

getValidity in interface CacheableProcessingComponent

Returns:

NOPValidity object - if the input is valid the output is valid as well.

startPrefixMapping

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

Begin the scope of a prefix-URI Namespace mapping.

Specified by:

startPrefixMapping in interface ContentHandler

Overrides:

startPrefixMapping in class AbstractXMLPipe

Parameters:

prefix - The Namespace prefix being declared.

uri - The Namespace URI the prefix is mapped to.

Throws:

SAXException

endPrefixMapping

public void endPrefixMapping(String prefix)
                      throws SAXException

End the scope of a prefix-URI mapping.

Specified by:

endPrefixMapping in interface ContentHandler

Overrides:

endPrefixMapping in class AbstractXMLPipe

Parameters:

prefix - The prefix that was being mapping.

Throws:

SAXException

startElement

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

Receive notification of the beginning of an element.

Specified by:

startElement in interface ContentHandler

Overrides:

startElement in class AbstractXMLPipe

Parameters:

uri - The Namespace URI, or the empty string if the element has no Namespace URI or if Namespace processing is not being performed.

loc - The local name (without prefix), or the empty string if Namespace processing is not being performed.

raw - The raw XML 1.0 name (with prefix), or the empty string if raw names are not available.

a - The attributes attached to the element. If there are no attributes, it shall be an empty Attributes object.

Throws:

SAXException

endElement

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

Receive notification of the end of an element.

Specified by:

endElement in interface ContentHandler

Overrides:

endElement in class AbstractXMLPipe

Parameters:

uri - The Namespace URI, or the empty string if the element has no Namespace URI or if Namespace processing is not being performed.

loc - The local name (without prefix), or the empty string if Namespace processing is not being performed.

raw - The raw XML 1.0 name (with prefix), or the empty string if raw names are not available.

Throws:

SAXException

characters

public void characters(char[] c,
                       int start,
                       int len)
                throws SAXException

Receive notification of character data.

Specified by:

characters in interface ContentHandler

Overrides:

characters in class AbstractXMLPipe

Parameters:

c - The characters from the XML document.

start - The start position in the array.

len - The number of characters to read from the array.

Throws:

SAXException

ignorableWhitespace

public void ignorableWhitespace(char[] c,
                                int start,
                                int len)
                         throws SAXException

Receive notification of ignorable whitespace in element content.

Specified by:

ignorableWhitespace in interface ContentHandler

Overrides:

ignorableWhitespace in class AbstractXMLPipe

Parameters:

c - The characters from the XML document.

start - The start position in the array.

len - The number of characters to read from the array.

Throws:

SAXException

processingInstruction

public void processingInstruction(String target,
                                  String data)
                           throws SAXException

Receive notification of a processing instruction.

Specified by:

processingInstruction in interface ContentHandler

Overrides:

processingInstruction in class AbstractXMLPipe

Parameters:

target - The processing instruction target.

data - The processing instruction data, or null if none was supplied.

Throws:

SAXException

skippedEntity

public void skippedEntity(String name)
                   throws SAXException

Receive notification of a skipped entity.

Specified by:

skippedEntity in interface ContentHandler

Overrides:

skippedEntity in class AbstractXMLPipe

Parameters:

name - The name of the skipped entity. If it is a parameter entity, the name will begin with '%'.

Throws:

SAXException

startDTD

public void startDTD(String name,
                     String publicId,
                     String systemId)
              throws SAXException

Report the start of DTD declarations, if any.

Specified by:

startDTD in interface LexicalHandler

Overrides:

startDTD in class AbstractXMLPipe

Parameters:

name - The document type name.

publicId - The declared public identifier for the external DTD subset, or null if none was declared.

systemId - The declared system identifier for the external DTD subset, or null if none was declared.

Throws:

SAXException

endDTD

public void endDTD()
            throws SAXException

Report the end of DTD declarations.

Specified by:

endDTD in interface LexicalHandler

Overrides:

endDTD in class AbstractXMLPipe

Throws:

SAXException

startEntity

public void startEntity(String name)
                 throws SAXException

Report the beginning of an entity.

Specified by:

startEntity in interface LexicalHandler

Overrides:

startEntity in class AbstractXMLPipe

Parameters:

name - The name of the entity. If it is a parameter entity, the name will begin with '%'.

Throws:

SAXException

endEntity

public void endEntity(String name)
               throws SAXException

Report the end of an entity.

Specified by:

endEntity in interface LexicalHandler

Overrides:

endEntity in class AbstractXMLPipe

Parameters:

name - The name of the entity that is ending.

Throws:

SAXException

startCDATA

public void startCDATA()
                throws SAXException

Report the start of a CDATA section.

Specified by:

startCDATA in interface LexicalHandler

Overrides:

startCDATA in class AbstractXMLPipe

Throws:

SAXException

endCDATA

public void endCDATA()
              throws SAXException

Report the end of a CDATA section.

Specified by:

endCDATA in interface LexicalHandler

Overrides:

endCDATA in class AbstractXMLPipe

Throws:

SAXException

comment

public void comment(char[] ch,
                    int start,
                    int len)
             throws SAXException

Report an XML comment anywhere in the document.

Specified by:

comment in interface LexicalHandler

Overrides:

comment in class AbstractXMLPipe

Parameters:

ch - An array holding the characters in the comment.

start - The starting position in the array.

len - The number of characters to use from the array.

Throws:

SAXException