Package org.apache.lucene.search.suggest.document

Class PrefixCompletionQuery

java.lang.Object

org.apache.lucene.search.Query

org.apache.lucene.search.suggest.document.CompletionQuery

org.apache.lucene.search.suggest.document.PrefixCompletionQuery

Direct Known Subclasses:

FuzzyCompletionQuery

public class PrefixCompletionQuery
extends CompletionQuery

A CompletionQuery which takes an Analyzer to analyze the prefix of the query term.

Example usage of querying an analyzed prefix 'sugg' against a field 'suggest_field' is as follows:

  CompletionQuery query = new PrefixCompletionQuery(analyzer, new Term("suggest_field", "sugg"));
 

WARNING: This API is experimental and might change in incompatible ways in the next release.

Field Summary

Fields

Modifier and Type	Field	Description
protected final CompletionAnalyzer	analyzer	Used to analyze the term text

Constructor Summary

Constructors

Constructor	Description
PrefixCompletionQuery(Analyzer analyzer, Term term)	Calls PrefixCompletionQuery(Analyzer, Term, BitsProducer) with no filter
PrefixCompletionQuery(Analyzer analyzer, Term term, BitsProducer filter)	Constructs an analyzed prefix completion query

Method Summary

Modifier and Type	Method	Description
Weight	createWeight(IndexSearcher searcher, ScoreMode scoreMode, float boost)
boolean	equals(Object o)
Analyzer	getAnalyzer()	Gets the analyzer used to analyze the prefix.
int	hashCode()
void	visit(QueryVisitor visitor)

Methods inherited from class org.apache.lucene.search.suggest.document.CompletionQuery

getField, getFilter, getTerm, rewrite, toString

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

classHash, sameClassAs, toString

Methods inherited from class java.lang.Object

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

Field Details

analyzer

protected final CompletionAnalyzer analyzer

Used to analyze the term text

Constructor Details

PrefixCompletionQuery

public PrefixCompletionQuery(Analyzer analyzer,
 Term term)

Calls PrefixCompletionQuery(Analyzer, Term, BitsProducer) with no filter

PrefixCompletionQuery

public PrefixCompletionQuery(Analyzer analyzer,
 Term term,
 BitsProducer filter)

Constructs an analyzed prefix completion query

Parameters:

analyzer - used to analyze the provided Term.text()

term - query is run against Term.field() and Term.text() is analyzed with analyzer

filter - used to query on a sub set of documents

Method Details

createWeight

public Weight createWeight(IndexSearcher searcher,
 ScoreMode scoreMode,
 float boost)
                    throws IOException

Overrides:

createWeight in class Query

Throws:

IOException

visit

public void visit(QueryVisitor visitor)

Specified by:

visit in class Query

getAnalyzer

public Analyzer getAnalyzer()

Gets the analyzer used to analyze the prefix.

equals

public boolean equals(Object o)

Specified by:

equals in class Query

hashCode

public int hashCode()

Specified by:

hashCode in class Query