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org.apache.cocoon.portal.transformation
Class EventLinkTransformer

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.AbstractSAXTransformer
                      org.apache.cocoon.portal.transformation.AbstractCopletTransformer
                          org.apache.cocoon.portal.transformation.EventLinkTransformer

All Implemented Interfaces:

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

public class EventLinkTransformer
extends AbstractCopletTransformer

This transformer searches for event descriptions in the XML. For each one an event is created and the event link is inserted into the XML instead of the description.

Example:

<root xmlns:event="http://apache.org/cocoon/portal/eventlink/1.0">
        <event:event attribute="href">
                <a href="http://eventlinkexample"/>
        </event:event>
        <event:event element="uri">
                <link><uri>http://eventlinkexample</uri></link>
        </event:event>
 </root>

The transformer will create two CopletLinkEvents and insert corresponding links to them to the XML instead of "http://eventlinkexample". If such a link is pressed the corresponding CopletLinkEvent is sent to the Subscribers to be handled.
Please see also the documentation of superclass AbstractCopletTransformer for how the coplet instance data are acquired.

Version:

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

Author:

Björn Lütkemeier

Field Summary

static String	ATTRIBUTE_ATTR An attribute's name of EVENT_ELEMENT.
static String	ELEMENT_ATTR An attribute's name of EVENT_ELEMENT.
static String	EVENT_ELEM The XML element name to listen for.
static String	NAMESPACE_URI The namespace URI to listen for.

Fields inherited from class org.apache.cocoon.portal.transformation.AbstractCopletTransformer

COPLET_ID_PARAM, portalService

Fields inherited from class org.apache.cocoon.transformation.AbstractSAXTransformer

context, defaultNamespaceURI, EMPTY_ATTRIBUTES, emptyAttributes, ignoreEmptyCharacters, ignoreEventsCount, ignoreHooksCount, ignoreWhitespaces, manager, namespaceURI, objectModel, parameters, recorderStack, request, resolver, response, source, stack

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

EventLinkTransformer()

Method Summary

void	endElement(String uri, String name, String raw) Overridden from superclass.
void	recycle() Overridden from superclass.
void	startElement(String uri, String name, String raw, Attributes attr) Overridden from superclass.

Methods inherited from class org.apache.cocoon.portal.transformation.AbstractCopletTransformer

dispose, getCopletInstanceData, getCopletInstanceData, getPortalService, service

Methods inherited from class org.apache.cocoon.transformation.AbstractSAXTransformer

addRecorder, characters, comment, configure, endCDATA, endDocument, endDTD, endEntity, endParametersRecording, endParametersRecording, endPrefixMapping, endRecording, endSAXRecording, endSerializedXMLRecording, endTextRecording, endTransformingElement, findPrefixMapping, getMutableAttributes, ignorableWhitespace, processingInstruction, removeRecorder, sendEndElementEvent, sendEndElementEventNS, sendEndPrefixMapping, sendEvents, sendParametersEvents, sendStartElementEvent, sendStartElementEvent, sendStartElementEventNS, sendStartElementEventNS, sendStartPrefixMapping, sendTextEvent, setDocumentLocator, setup, setupTransforming, skippedEntity, startCDATA, startDocument, startDTD, startEntity, startParametersRecording, startPrefixMapping, startRecording, startSAXRecording, startSerializedXMLRecording, startTextRecording, startTransformingElement

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.apache.cocoon.xml.XMLProducer

setConsumer

Field Detail

NAMESPACE_URI

public static final String NAMESPACE_URI

The namespace URI to listen for.

See Also:

Constant Field Values

EVENT_ELEM

public static final String EVENT_ELEM

The XML element name to listen for.

See Also:

Constant Field Values

ATTRIBUTE_ATTR

public static final String ATTRIBUTE_ATTR

An attribute's name of EVENT_ELEMENT.

See Also:

Constant Field Values

ELEMENT_ATTR

public static final String ELEMENT_ATTR

An attribute's name of EVENT_ELEMENT.

See Also:

Constant Field Values

Constructor Detail

EventLinkTransformer

public EventLinkTransformer()

Method Detail

recycle

public void recycle()

Overridden from superclass.

Specified by:

recycle in interface Recyclable

Overrides:

recycle in class AbstractSAXTransformer

startElement

public void startElement(String uri,
                         String name,
                         String raw,
                         Attributes attr)
                  throws SAXException

Overridden from superclass.

Specified by:

startElement in interface ContentHandler

Overrides:

startElement in class AbstractSAXTransformer

Parameters:

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

name - 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.

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

Throws:

SAXException

See Also:

ContentHandler.startElement(java.lang.String, java.lang.String, java.lang.String, org.xml.sax.Attributes)

endElement

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

Overridden from superclass.

Specified by:

endElement in interface ContentHandler

Overrides:

endElement in class AbstractSAXTransformer

Parameters:

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

name - 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

See Also:

ContentHandler.endElement(java.lang.String, java.lang.String, java.lang.String)