org.apache.solr.handler.component

Class ExpandComponent

java.lang.Object

org.apache.solr.handler.component.SearchComponent

org.apache.solr.handler.component.ExpandComponent

All Implemented Interfaces:

SolrInfoMBean, NamedListInitializedPlugin, PluginInfoInitialized, SolrCoreAware

public class ExpandComponent
extends SearchComponent
implements PluginInfoInitialized, SolrCoreAware

The ExpandComponent is designed to work with the CollapsingPostFilter. The CollapsingPostFilter collapses a result set on a field.

The ExpandComponent expands the collapsed groups for a single page.

http parameters:

expand=true
expand.rows=5
expand.sort=field asc|desc
expand.q=*:* (optional, overrides the main query)
expand.fq=type:child (optional, overrides the main filter queries)
expand.field=field (mandatory if the not used with the CollapsingQParserPlugin)

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.solr.core.SolrInfoMBean

SolrInfoMBean.Category

Field Summary

Fields

Modifier and Type	Field and Description
static String	COMPONENT_NAME

Constructor Summary

Constructors

Constructor and Description
ExpandComponent()

Method Summary

Methods

Modifier and Type	Method and Description
void	finishStage(ResponseBuilder rb) Called after all responses have been received for this stage.
String	getDescription() Simple one or two line description
URL[]	getDocs() Documentation URL list.
String	getSource() CVS Source, SVN Source, etc
void	handleResponses(ResponseBuilder rb, ShardRequest sreq) Called after all responses for a single request were received
void	inform(SolrCore core)
void	init(PluginInfo info)
void	modifyRequest(ResponseBuilder rb, SearchComponent who, ShardRequest sreq) Called after another component adds a request
void	prepare(ResponseBuilder rb) Prepare the response.
void	process(ResponseBuilder rb) Process the request for this component

Methods inherited from class org.apache.solr.handler.component.SearchComponent

distributedProcess, getCategory, getName, getStatistics, getVersion, init, setName

Methods inherited from class java.lang.Object

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

Field Detail

COMPONENT_NAME

public static final String COMPONENT_NAME

See Also:

Constant Field Values

Constructor Detail

ExpandComponent

public ExpandComponent()

Method Detail

init

public void init(PluginInfo info)

Specified by:

init in interface PluginInfoInitialized

prepare

public void prepare(ResponseBuilder rb)
             throws IOException

Description copied from class: SearchComponent

Prepare the response. Guaranteed to be called before any SearchComponent SearchComponent.process(org.apache.solr.handler.component.ResponseBuilder) method. Called for every incoming request. The place to do initialization that is request dependent.

Specified by:

prepare in class SearchComponent

Parameters:

rb - The ResponseBuilder

Throws:

IOException - If there is a low-level I/O error.

inform

public void inform(SolrCore core)

Specified by:

inform in interface SolrCoreAware

process

public void process(ResponseBuilder rb)
             throws IOException

Description copied from class: SearchComponent

Process the request for this component

Specified by:

process in class SearchComponent

Parameters:

rb - The ResponseBuilder

Throws:

IOException - If there is a low-level I/O error.

modifyRequest

public void modifyRequest(ResponseBuilder rb,
                 SearchComponent who,
                 ShardRequest sreq)

Description copied from class: SearchComponent

Called after another component adds a request

Overrides:

modifyRequest in class SearchComponent

handleResponses

public void handleResponses(ResponseBuilder rb,
                   ShardRequest sreq)

Description copied from class: SearchComponent

Called after all responses for a single request were received

Overrides:

handleResponses in class SearchComponent

finishStage

public void finishStage(ResponseBuilder rb)

Description copied from class: SearchComponent

Called after all responses have been received for this stage. Useful when different requests are sent to each shard.

Overrides:

finishStage in class SearchComponent

getDescription

public String getDescription()

Description copied from interface: SolrInfoMBean

Simple one or two line description

Specified by:

getDescription in interface SolrInfoMBean

Specified by:

getDescription in class SearchComponent

getSource

public String getSource()

Description copied from interface: SolrInfoMBean

CVS Source, SVN Source, etc

Specified by:

getSource in interface SolrInfoMBean

Specified by:

getSource in class SearchComponent

getDocs

public URL[] getDocs()

Description copied from interface: SolrInfoMBean

Documentation URL list.

Suggested documentation URLs: Homepage for sponsoring project, FAQ on class usage, Design doc for class, Wiki, bug reporting URL, etc...

Specified by:

getDocs in interface SolrInfoMBean

Overrides:

getDocs in class SearchComponent