org.dspace.app.xmlui.opensearch
Class DiscoveryOpenSearchGenerator

java.lang.Object
  org.apache.cocoon.util.AbstractLogEnabled
      org.apache.cocoon.xml.AbstractXMLProducer
          org.apache.cocoon.generation.AbstractGenerator
              org.dspace.app.xmlui.opensearch.AbstractOpenSearchGenerator
                  org.dspace.app.xmlui.opensearch.DiscoveryOpenSearchGenerator

All Implemented Interfaces:

org.apache.avalon.excalibur.pool.Poolable, org.apache.avalon.excalibur.pool.Recyclable, org.apache.cocoon.caching.CacheableProcessingComponent, org.apache.cocoon.generation.Generator, org.apache.cocoon.sitemap.SitemapModelComponent, org.apache.cocoon.xml.XMLProducer

public class DiscoveryOpenSearchGenerator
extends AbstractOpenSearchGenerator
implements org.apache.cocoon.caching.CacheableProcessingComponent, org.apache.avalon.excalibur.pool.Recyclable

Generate an OpenSearch compliant search results document for DSpace, either scoped by a collection, a community or the whole repository. This class implements the generate() method in order to issue a search using the PostgreSQL indexes. Search params are parsed by AbstractOpenSearchGenerator class. I18N: Feed's are internationalized, meaning that they may contain references to messages contained in the global messages.xml file using cocoon's i18n schema. However the library used to build the feeds does not understand this schema to work around this limitation I created a little hack. It basically works like this, when text that needs to be localized is put into the feed it is always mangled such that a prefix is added to the messages's key. Thus if the key were "xmlui.feed.text" then the resulting text placed into the feed would be "I18N:xmlui.feed.text". After the library is finished and produced it's final result the output is traversed to find these occurrences and replace them with proper cocoon i18n elements.

Author:

Richard Rodgers, Nestor Oviedo

Field Summary

Fields inherited from class org.dspace.app.xmlui.opensearch.AbstractOpenSearchGenerator

DEFAULT_RPP, format, MAX_RPP, query, resultsDoc, rpp, scope, sort, sortOrder, start

Fields inherited from class org.apache.cocoon.generation.AbstractGenerator

objectModel, parameters, resolver, source

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

contentHandler, EMPTY_CONTENT_HANDLER, lexicalHandler, xmlConsumer

Fields inherited from interface org.apache.cocoon.generation.Generator

ROLE

Constructor Summary

DiscoveryOpenSearchGenerator()

Method Summary

void	generate() Generate the search results document.
void	recycle() Recycle
void	setup(org.apache.cocoon.environment.SourceResolver resolver, Map objectModel, String src, org.apache.avalon.framework.parameters.Parameters par) Setup the Discovery search service.

Methods inherited from class org.dspace.app.xmlui.opensearch.AbstractOpenSearchGenerator

getKey, getValidity

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

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.caching.CacheableProcessingComponent

getKey, getValidity

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

setConsumer

Constructor Detail

DiscoveryOpenSearchGenerator

public DiscoveryOpenSearchGenerator()

Method Detail

setup

public void setup(org.apache.cocoon.environment.SourceResolver resolver,
                  Map objectModel,
                  String src,
                  org.apache.avalon.framework.parameters.Parameters par)
           throws org.apache.cocoon.ProcessingException,
                  SAXException,
                  IOException

Setup the Discovery search service. Other paramas are setup in superclass's methods

Specified by:

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

Overrides:

setup in class AbstractOpenSearchGenerator

Throws:

org.apache.cocoon.ProcessingException

SAXException

IOException

generate

public void generate()
              throws IOException,
                     SAXException,
                     org.apache.cocoon.ProcessingException

Generate the search results document.

Specified by:

generate in interface org.apache.cocoon.generation.Generator

Throws:

IOException

SAXException

org.apache.cocoon.ProcessingException

recycle

public void recycle()

Recycle

Specified by:

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

Overrides:

recycle in class AbstractOpenSearchGenerator