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Java Source Code / Java Documentation » Net » lucene connector » org.apache.lucene.search.function

Source Cross Reference Class Diagram Java Document (Java Doc)

java.lang .Object

org.apache.lucene.search .Query

org.apache.lucene.search.function .ValueSourceQuery

All known Subclasses:   org.apache.lucene.search.function .FieldScoreQuery,
ValueSourceQuery
public class ValueSourceQuery extends Query (Code)
Expert: A Query that sets the scores of document to the values obtained from a org.apache.lucene.search.function.ValueSource ValueSource .
The value source can be based on a (cached) value of an indexd field, but it can also be based on an external source, e.g. values read from an external database.
Score is set as: Score(doc,query) = query.getBoost()² * valueSource(doc).
WARNING: The status of the search.function package is experimental. The APIs introduced here might change in the future and will not be supported anymore in such a case.
author:
   yonik

Field Summary
ValueSource valSrc


Constructor Summary
public ValueSourceQuery(ValueSource valSrc)


Method Summary
protected Weight createWeight(Searcher searcher)

public boolean equals(Object o)
     Returns true if o is equal to this.
public void extractTerms(Set terms)

public int hashCode()
     Returns a hash code value for this object.
public Query rewrite(IndexReader reader)

public String toString(String field)


Field Detail
valSrc
ValueSource valSrc(Code)

Constructor Detail
ValueSourceQuery
public ValueSourceQuery(ValueSource valSrc)(Code)
Create a value source query
Parameters:
  valSrc - provides the values defines the function to be used for scoring

Method Detail
createWeight
protected Weight createWeight(Searcher searcher)(Code)

equals
public boolean equals(Object o)(Code)
Returns true if o is equal to this.

extractTerms
public void extractTerms(Set terms)(Code)

hashCode
public int hashCode()(Code)
Returns a hash code value for this object.

rewrite
public Query rewrite(IndexReader reader) throws IOException(Code)

toString
public String toString(String field)(Code)

Methods inherited from org.apache.lucene.search.Query
public Object clone()(Code)(Java Doc)
public Query combine(Query[] queries)(Code)(Java Doc)
protected Weight createWeight(Searcher searcher) throws IOException(Code)(Java Doc)
public void extractTerms(Set terms)(Code)(Java Doc)
public float getBoost()(Code)(Java Doc)
public Similarity getSimilarity(Searcher searcher)(Code)(Java Doc)
public static Query mergeBooleanQueries(Query[] queries)(Code)(Java Doc)
public Query rewrite(IndexReader reader) throws IOException(Code)(Java Doc)
public void setBoost(float b)(Code)(Java Doc)
abstract public String toString(String field)(Code)(Java Doc)
public String toString()(Code)(Java Doc)
public Weight weight(Searcher searcher) throws IOException(Code)(Java Doc)

Methods inherited from java.lang.Object
native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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