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org.apache.lenya.cms.cocoon.transformation
Class UuidToUrlTransformer

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.lenya.cms.cocoon.transformation.AbstractLinkTransformer
                          org.apache.lenya.cms.cocoon.transformation.UuidToUrlTransformer

All Implemented Interfaces:

org.apache.avalon.excalibur.pool.Poolable, org.apache.avalon.excalibur.pool.Recyclable, org.apache.avalon.framework.activity.Disposable, org.apache.avalon.framework.component.Component, org.apache.avalon.framework.configuration.Configurable, org.apache.avalon.framework.logger.LogEnabled, org.apache.avalon.framework.service.Serviceable, org.apache.cocoon.sitemap.SitemapModelComponent, org.apache.cocoon.transformation.Transformer, org.apache.cocoon.xml.XMLPipe, org.apache.cocoon.xml.XMLProducer, org.apache.excalibur.xml.sax.XMLConsumer, org.xml.sax.ContentHandler, org.xml.sax.ext.LexicalHandler

public class UuidToUrlTransformer
extends AbstractLinkTransformer
implements org.apache.avalon.framework.activity.Disposable

UUID to URL transformer.

This transformer is applied to an XHMTL document. It processes all links following the LinkResolver syntax which are configured using <transform/> elements (see below).

These links are resolved using the following rules:

• The current area (obtained from the page envelope) is used.
• A URL prefix is added depending on the proxy configuration of the publication.
• If the target document does not exist and is in the authoring area, the href attribute is removed and a class="brokenlink" attribute is added to the <a/> element.
• If the target document does not exist and is in the live area, the <a/> element is removed to disable the link.

You can add the query parameter uuid2url.extension to lenya-document: URLs to set a specific link extension.

The resulting URLs are absolute web application URLs (without the servlet context path).

$Id: LinkRewritingTransformer.java,v 1.7 2004/03/16 11:12:16 gregor

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.lenya.cms.cocoon.transformation.AbstractLinkTransformer

AbstractLinkTransformer.AttributeConfiguration

Field Summary

protected static java.lang.String	BROKEN_ATTRIB
protected static java.lang.String	BROKEN_VALUE
protected static java.lang.String	EXTENSION_PARAM

Fields inherited from class org.apache.lenya.cms.cocoon.transformation.AbstractLinkTransformer

ignoreLinkElement, indent

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

UuidToUrlTransformer()

Method Summary

void	dispose()
protected Link	getAbsoluteLink(org.apache.lenya.cms.publication.URLInformation info, java.lang.String linkUri) The link is constructed from the linkUri string.
protected java.lang.String	getExtension(org.apache.lenya.cms.publication.Document targetDocument, java.lang.String requiredExtension) Get the extension of a document.
protected LinkRewriter	getLinkRewriter()
protected void	handleLink(java.lang.String linkUrl, AbstractLinkTransformer.AttributeConfiguration config, org.xml.sax.helpers.AttributesImpl newAttrs) Handle a link in the source SAX stream.
protected void	markBrokenLink(org.xml.sax.helpers.AttributesImpl newAttrs, java.lang.String attrName, java.lang.String brokenUrl) Marks a <a/> element as broken and removes href attribute.
void	recycle()
protected void	rewriteLink(org.xml.sax.helpers.AttributesImpl newAttrs, java.lang.String attributeName, org.apache.lenya.cms.publication.Document targetDocument, java.lang.String anchor, java.lang.String queryString, java.lang.String extension) Rewrites a link.
protected void	setAttribute(org.xml.sax.helpers.AttributesImpl attr, java.lang.String name, java.lang.String value) Sets the value of the href attribute.
void	setup(org.apache.cocoon.environment.SourceResolver _resolver, java.util.Map _objectModel, java.lang.String _source, org.apache.avalon.framework.parameters.Parameters _parameters)

Methods inherited from class org.apache.lenya.cms.cocoon.transformation.AbstractLinkTransformer

configure, endElement, existsMatchingConfiguration, getCacheKey, getMatchingConfigurations, startElement

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

addRecorder, characters, comment, 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, service, setDocumentLocator, 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

BROKEN_ATTRIB

protected static final java.lang.String BROKEN_ATTRIB

See Also:

Constant Field Values

BROKEN_VALUE

protected static final java.lang.String BROKEN_VALUE

See Also:

Constant Field Values

EXTENSION_PARAM

protected static final java.lang.String EXTENSION_PARAM

See Also:

Constant Field Values

Constructor Detail

UuidToUrlTransformer

public UuidToUrlTransformer()

Method Detail

setup

public void setup(org.apache.cocoon.environment.SourceResolver _resolver,
                  java.util.Map _objectModel,
                  java.lang.String _source,
                  org.apache.avalon.framework.parameters.Parameters _parameters)
           throws org.apache.cocoon.ProcessingException,
                  org.xml.sax.SAXException,
                  java.io.IOException

Specified by:

setup in interface org.apache.cocoon.sitemap.SitemapModelComponent

Overrides:

setup in class org.apache.cocoon.transformation.AbstractSAXTransformer

Throws:

org.apache.cocoon.ProcessingException

org.xml.sax.SAXException

java.io.IOException

See Also:

SitemapModelComponent.setup(org.apache.cocoon.environment.SourceResolver, java.util.Map, java.lang.String, org.apache.avalon.framework.parameters.Parameters)

handleLink

protected void handleLink(java.lang.String linkUrl,
                          AbstractLinkTransformer.AttributeConfiguration config,
                          org.xml.sax.helpers.AttributesImpl newAttrs)
                   throws java.lang.Exception

Description copied from class: AbstractLinkTransformer

Handle a link in the source SAX stream.

Overrides:

handleLink in class AbstractLinkTransformer

Parameters:

linkUrl - The link URL.

config - The attribute configuration which matched the link.

newAttrs - The new attributes which will be added to the result element.

Throws:

java.lang.Exception - if an error occurs.

getAbsoluteLink

protected Link getAbsoluteLink(org.apache.lenya.cms.publication.URLInformation info,
                               java.lang.String linkUri)
                        throws java.net.MalformedURLException

The link is constructed from the linkUri string. If it lacks the area or publication ID information, these are obtained from the current URL information.

Parameters:

info - The current URL information.

linkUri - The link URI to use.

Returns:

A link.

Throws:

java.net.MalformedURLException - if the linkUri parameter is malformed.

getExtension

protected java.lang.String getExtension(org.apache.lenya.cms.publication.Document targetDocument,
                                        java.lang.String requiredExtension)

Get the extension of a document. Caution: resolving the extension is expensive!

Parameters:

targetDocument - The document.

requiredExtension - The required extension.

Returns:

The required extension or, if it is null, the document's default extension.

markBrokenLink

protected void markBrokenLink(org.xml.sax.helpers.AttributesImpl newAttrs,
                              java.lang.String attrName,
                              java.lang.String brokenUrl)
                       throws org.apache.lenya.ac.AccessControlException

Marks a <a/> element as broken and removes href attribute.

Parameters:

newAttrs - The new attributes.

attrName - The attribute name.

brokenUrl - The broken link URI.

Throws:

org.apache.lenya.ac.AccessControlException - when something went wrong.

rewriteLink

protected void rewriteLink(org.xml.sax.helpers.AttributesImpl newAttrs,
                           java.lang.String attributeName,
                           org.apache.lenya.cms.publication.Document targetDocument,
                           java.lang.String anchor,
                           java.lang.String queryString,
                           java.lang.String extension)
                    throws org.apache.lenya.ac.AccessControlException

Rewrites a link.

Parameters:

newAttrs - The new attributes.

attributeName - The name of the attribute to rewrite.

targetDocument - The target document.

anchor - The anchor (the string after the # character in the URL).

queryString - The query string without question mark.

extension - The extension to use.

Throws:

org.apache.lenya.ac.AccessControlException - when something went wrong.

setAttribute

protected void setAttribute(org.xml.sax.helpers.AttributesImpl attr,
                            java.lang.String name,
                            java.lang.String value)

Sets the value of the href attribute.

Overrides:

setAttribute in class AbstractLinkTransformer

Parameters:

attr - The attributes.

name - The attribute name.

value - The value.

Throws:

java.lang.IllegalArgumentException - if the href attribute is not contained in this attributes.

dispose

public void dispose()

Specified by:

dispose in interface org.apache.avalon.framework.activity.Disposable

Overrides:

dispose in class org.apache.cocoon.transformation.AbstractSAXTransformer

See Also:

Disposable.dispose()

recycle

public void recycle()

Specified by:

recycle in interface org.apache.avalon.excalibur.pool.Recyclable

Overrides:

recycle in class org.apache.cocoon.transformation.AbstractSAXTransformer

See Also:

Recyclable.recycle()

getLinkRewriter

protected LinkRewriter getLinkRewriter()

Specified by:

getLinkRewriter in class AbstractLinkTransformer

Returns:

The link rewriter used by this transformer.