org.apache.lucene.search.similar

Class MoreLikeThisQuery

java.lang.Object

org.apache.lucene.search.Query

org.apache.lucene.search.similar.MoreLikeThisQuery

All Implemented Interfaces:

Serializable, Cloneable

public class MoreLikeThisQuery
extends Query

A simple wrapper for MoreLikeThis for use in scenarios where a Query object is required eg in custom QueryParser extensions. At query.rewrite() time the reader is used to construct the actual MoreLikeThis object and obtain the real Query object.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
MoreLikeThisQuery(String likeText, String[] moreLikeFields, Analyzer analyzer) Deprecated. use MoreLikeThisQuery(String, String[], Analyzer, String) instead.
MoreLikeThisQuery(String likeText, String[] moreLikeFields, Analyzer analyzer, String fieldName)

Method Summary

Methods

Modifier and Type	Method and Description
Analyzer	getAnalyzer()
String	getLikeText()
int	getMaxQueryTerms()
int	getMinDocFreq()
int	getMinTermFrequency()
String[]	getMoreLikeFields()
float	getPercentTermsToMatch()
Set<?>	getStopWords()
Query	rewrite(IndexReader reader) Expert: called to re-write queries into primitive queries.
void	setAnalyzer(Analyzer analyzer)
void	setLikeText(String likeText)
void	setMaxQueryTerms(int maxQueryTerms)
void	setMinDocFreq(int minDocFreq)
void	setMinTermFrequency(int minTermFrequency)
void	setMoreLikeFields(String[] moreLikeFields)
void	setPercentTermsToMatch(float percentTermsToMatch)
void	setStopWords(Set<?> stopWords)
String	toString(String field) Prints a query to a string, with field assumed to be the default field and omitted.

Methods inherited from class org.apache.lucene.search.Query

clone, combine, createWeight, equals, extractTerms, getBoost, getSimilarity, hashCode, mergeBooleanQueries, setBoost, toString, weight

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

MoreLikeThisQuery

@Deprecated
public MoreLikeThisQuery(String likeText,
                            String[] moreLikeFields,
                            Analyzer analyzer)

Deprecated. use MoreLikeThisQuery(String, String[], Analyzer, String) instead.

MoreLikeThisQuery

public MoreLikeThisQuery(String likeText,
                 String[] moreLikeFields,
                 Analyzer analyzer,
                 String fieldName)

Parameters:

moreLikeFields -

Method Detail

rewrite

public Query rewrite(IndexReader reader)
              throws IOException

Description copied from class: Query

Expert: called to re-write queries into primitive queries. For example, a PrefixQuery will be rewritten into a BooleanQuery that consists of TermQuerys.

Overrides:

rewrite in class Query

Throws:

IOException

toString

public String toString(String field)

Description copied from class: Query

Prints a query to a string, with field assumed to be the default field and omitted.

The representation used is one that is supposed to be readable by QueryParser. However, there are the following limitations:

• If the query was created by the parser, the printed representation may not be exactly what was parsed. For example, characters that need to be escaped will be represented without the required backslash.
• Some of the more complicated queries (e.g. span queries) don't have a representation that can be parsed by QueryParser.

Specified by:

toString in class Query

getPercentTermsToMatch

public float getPercentTermsToMatch()

setPercentTermsToMatch

public void setPercentTermsToMatch(float percentTermsToMatch)

getAnalyzer

public Analyzer getAnalyzer()

setAnalyzer

public void setAnalyzer(Analyzer analyzer)

getLikeText

public String getLikeText()

setLikeText

public void setLikeText(String likeText)

getMaxQueryTerms

public int getMaxQueryTerms()

setMaxQueryTerms

public void setMaxQueryTerms(int maxQueryTerms)

getMinTermFrequency

public int getMinTermFrequency()

setMinTermFrequency

public void setMinTermFrequency(int minTermFrequency)

getMoreLikeFields

public String[] getMoreLikeFields()

setMoreLikeFields

public void setMoreLikeFields(String[] moreLikeFields)

getStopWords

public Set<?> getStopWords()

setStopWords

public void setStopWords(Set<?> stopWords)

getMinDocFreq

public int getMinDocFreq()

setMinDocFreq

public void setMinDocFreq(int minDocFreq)