Package org.apache.solr.spelling

Class SolrSpellChecker

java.lang.Object

org.apache.solr.spelling.SolrSpellChecker

Direct Known Subclasses:

AbstractLuceneSpellChecker, ConjunctionSolrSpellChecker, DirectSolrSpellChecker, Suggester, WordBreakSolrSpellChecker

public abstract class SolrSpellChecker
extends Object

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

Since:

solr 1.3

Field Summary

Fields

Modifier and Type	Field	Description
protected org.apache.lucene.analysis.Analyzer	analyzer
static final String	DEFAULT_DICTIONARY_NAME
static final String	DICTIONARY_NAME
protected String	field
static final String	FIELD
static final String	FIELD_TYPE
protected String	fieldTypeName
protected String	name	Dictionary name

Constructor Summary

Constructors

Constructor	Description
SolrSpellChecker()

Method Summary

Modifier and Type	Method	Description
abstract void	build(SolrCore core, SolrIndexSearcher searcher)	(re)Builds the spelling index.
protected float	getAccuracy()	Get the value of SpellingParams.SPELLCHECK_ACCURACY if supported.
String	getDictionaryName()
org.apache.lucene.analysis.Analyzer	getQueryAnalyzer()
protected org.apache.lucene.search.spell.StringDistance	getStringDistance()	Get the distance implementation used by this spellchecker, or NULL if not applicable.
abstract SpellingResult	getSuggestions(SpellingOptions options)	Get suggestions for the given query.
String	init(org.apache.solr.common.util.NamedList<?> config, SolrCore core)
boolean	isSuggestionsMayOverlap()
SpellingResult	mergeSuggestions(SpellCheckMergeData mergeData, int numSug, int count, boolean extendedResults)	Integrate spelling suggestions from the various shards in a distributed environment.
void	modifyRequest(ResponseBuilder rb, ShardRequest sreq)	modify the shard request to be used in a distributed environment.
abstract void	reload(SolrCore core, SolrIndexSearcher searcher)	Reloads the index.

Methods inherited from class java.lang.Object

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

Field Details

DICTIONARY_NAME

public static final String DICTIONARY_NAME

See Also:

• Constant Field Values

DEFAULT_DICTIONARY_NAME

public static final String DEFAULT_DICTIONARY_NAME

See Also:

• Constant Field Values

FIELD

public static final String FIELD

See Also:

• Constant Field Values

FIELD_TYPE

public static final String FIELD_TYPE

See Also:

• Constant Field Values

name

protected String name

Dictionary name

analyzer

protected org.apache.lucene.analysis.Analyzer analyzer

field

protected String field

fieldTypeName

protected String fieldTypeName

Constructor Details

SolrSpellChecker

public SolrSpellChecker()

Method Details

init

public String init(org.apache.solr.common.util.NamedList<?> config,
 SolrCore core)

modifyRequest

public void modifyRequest(ResponseBuilder rb,
 ShardRequest sreq)

modify the shard request to be used in a distributed environment.

mergeSuggestions

public SpellingResult mergeSuggestions(SpellCheckMergeData mergeData,
 int numSug,
 int count,
 boolean extendedResults)

Integrate spelling suggestions from the various shards in a distributed environment.

getQueryAnalyzer

public org.apache.lucene.analysis.Analyzer getQueryAnalyzer()

getDictionaryName

public String getDictionaryName()

reload

public abstract void reload(SolrCore core,
 SolrIndexSearcher searcher)
                     throws IOException

Reloads the index. Useful if an external process is responsible for building the spell checker.

Throws:

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

build

public abstract void build(SolrCore core,
 SolrIndexSearcher searcher)
                    throws IOException

(re)Builds the spelling index. May be a NOOP if the implementation doesn't require building, or can't be rebuilt.

Throws:

IOException

getAccuracy

protected float getAccuracy()

Get the value of SpellingParams.SPELLCHECK_ACCURACY if supported. Otherwise throws UnsupportedOperationException.

getStringDistance

protected org.apache.lucene.search.spell.StringDistance getStringDistance()

Get the distance implementation used by this spellchecker, or NULL if not applicable.

getSuggestions

public abstract SpellingResult getSuggestions(SpellingOptions options)
                                       throws IOException

Get suggestions for the given query. Tokenizes the query using a field appropriate Analyzer. The SpellingResult.getSuggestions() suggestions must be ordered by best suggestion first.

Parameters:

options - The SpellingOptions to use

Returns:

The SpellingResult suggestions

Throws:

IOException - if there is an error producing suggestions

isSuggestionsMayOverlap

public boolean isSuggestionsMayOverlap()