Package org.apache.solr.handler.component

Class SpellCheckComponent

java.lang.Object

org.apache.solr.handler.component.SearchComponent

org.apache.solr.handler.component.SpellCheckComponent

All Implemented Interfaces:

AutoCloseable, org.apache.solr.common.params.SpellingParams, SolrInfoBean, SolrMetricProducer, NamedListInitializedPlugin, SolrCoreAware

public class SpellCheckComponent
extends SearchComponent
implements SolrCoreAware, org.apache.solr.common.params.SpellingParams

A SearchComponent implementation which provides support for spell checking and suggestions using the Lucene contributed SpellChecker.

Refer to https://solr.apache.org/guide/solr/latest/query-guide/spell-checking.html for more details

Since:

solr 1.3

Nested Class Summary

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

SolrInfoBean.Category, SolrInfoBean.Group

Field Summary

Fields

Modifier and Type	Field	Description
static final String	COMPONENT_NAME	Base name for all spell checker query parameters.
static final boolean	DEFAULT_ONLY_MORE_POPULAR
protected org.apache.solr.common.util.NamedList<?>	initParams
protected QueryConverter	queryConverter
protected Map<String,SolrSpellChecker>	spellCheckers	Key is the dictionary, value is the SpellChecker for that dictionary name

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

solrMetricsContext, standard_components

Fields inherited from interface org.apache.solr.metrics.SolrMetricProducer

CATEGORY_ATTR, HANDLER_ATTR, NAME_ATTR, OPERATION_ATTR, PLUGIN_NAME_ATTR, RESULT_ATTR, TYPE_ATTR

Fields inherited from interface org.apache.solr.common.params.SpellingParams

SPELLCHECK_ACCURACY, SPELLCHECK_ALTERNATIVE_TERM_COUNT, SPELLCHECK_BUILD, SPELLCHECK_COLLATE, SPELLCHECK_COLLATE_EXTENDED_RESULTS, SPELLCHECK_COLLATE_MAX_COLLECT_DOCS, SPELLCHECK_COLLATE_PARAM_OVERRIDE, SPELLCHECK_COUNT, SPELLCHECK_DICT, SPELLCHECK_EXTENDED_RESULTS, SPELLCHECK_MAX_COLLATION_EVALUATIONS, SPELLCHECK_MAX_COLLATION_TRIES, SPELLCHECK_MAX_COLLATIONS, SPELLCHECK_MAX_RESULTS_FOR_SUGGEST, SPELLCHECK_MAX_RESULTS_FOR_SUGGEST_FQ, SPELLCHECK_ONLY_MORE_POPULAR, SPELLCHECK_PREFIX, SPELLCHECK_Q, SPELLCHECK_RELOAD

Constructor Summary

Constructors

Constructor	Description
SpellCheckComponent()

Method Summary

Modifier and Type	Method	Description
protected void	addCollationsToResponse(org.apache.solr.common.params.SolrParams params, SpellingResult spellingResult, ResponseBuilder rb, String q, org.apache.solr.common.util.NamedList<Object> response, boolean suggestionsMayOverlap)
void	finishStage(ResponseBuilder rb)	Called after all responses have been received for this stage.
protected org.apache.solr.common.params.SolrParams	getCustomParams(String dictionary, org.apache.solr.common.params.SolrParams params)	For every param that is of the form "spellcheck.[dictionary name].XXXX=YYYY, add XXXX=YYYY as a param to the custom param list
String	getDescription()	Simple one or two line description
SolrSpellChecker	getSpellChecker(String name)
protected SolrSpellChecker	getSpellChecker(org.apache.solr.common.params.SolrParams params)
Map<String,SolrSpellChecker>	getSpellCheckers()
void	inform(SolrCore core)
void	init(org.apache.solr.common.util.NamedList<?> args)	init will be called just once, immediately after creation.
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
protected org.apache.solr.common.util.NamedList<Object>	toNamedList(boolean shardRequest, SpellingResult spellingResult, String origQuery, boolean extendedResults)

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

distributedProcess, getCategory, getName, getSolrMetricsContext, handleResponses, initializeMetrics, setName

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.solr.metrics.SolrMetricProducer

close

Field Details

DEFAULT_ONLY_MORE_POPULAR

public static final boolean DEFAULT_ONLY_MORE_POPULAR

See Also:

• Constant Field Values

COMPONENT_NAME

public static final String COMPONENT_NAME

Base name for all spell checker query parameters. This name is also used to register this component with SearchHandler.

See Also:

• Constant Field Values

initParams

protected org.apache.solr.common.util.NamedList<?> initParams

spellCheckers

protected Map<String,SolrSpellChecker> spellCheckers

Key is the dictionary, value is the SpellChecker for that dictionary name

queryConverter

protected QueryConverter queryConverter

Constructor Details

SpellCheckComponent

public SpellCheckComponent()

Method Details

init

public void init(org.apache.solr.common.util.NamedList<?> args)

Description copied from interface: NamedListInitializedPlugin

init will be called just once, immediately after creation.

Source of the initialization arguments will typically be solrconfig.xml, but will ultimately depends on the plugin itself

Specified by:

init in interface NamedListInitializedPlugin

Parameters:

args - non-null list of initialization parameters (may be empty)

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.

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.

addCollationsToResponse

protected void addCollationsToResponse(org.apache.solr.common.params.SolrParams params,
 SpellingResult spellingResult,
 ResponseBuilder rb,
 String q,
 org.apache.solr.common.util.NamedList<Object> response,
 boolean suggestionsMayOverlap)

getCustomParams

protected org.apache.solr.common.params.SolrParams getCustomParams(String dictionary,
 org.apache.solr.common.params.SolrParams params)

For every param that is of the form "spellcheck.[dictionary name].XXXX=YYYY, add XXXX=YYYY as a param to the custom param list

Parameters:

params - The original SolrParams

Returns:

The new Params

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

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

getSpellChecker

protected SolrSpellChecker getSpellChecker(org.apache.solr.common.params.SolrParams params)

getSpellChecker

public SolrSpellChecker getSpellChecker(String name)

Returns:

the spellchecker registered to a given name

toNamedList

protected org.apache.solr.common.util.NamedList<Object> toNamedList(boolean shardRequest,
 SpellingResult spellingResult,
 String origQuery,
 boolean extendedResults)

inform

public void inform(SolrCore core)

Specified by:

inform in interface SolrCoreAware

getSpellCheckers

public Map<String,SolrSpellChecker> getSpellCheckers()

getDescription

public String getDescription()

Description copied from interface: SolrInfoBean

Simple one or two line description

Specified by:

getDescription in interface SolrInfoBean

Specified by:

getDescription in class SearchComponent