org.apache.lucene.search.spans

Class SpanWeight

java.lang.Object

org.apache.lucene.search.spans.SpanWeight

All Implemented Interfaces:

Serializable, Weight

Direct Known Subclasses:

BoostingTermQuery.BoostingTermWeight

public class SpanWeight
extends Object
implements Weight

Expert-only. Public for use by other weight implementations

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected float	idf
protected SpanQuery	query
protected float	queryNorm
protected float	queryWeight
protected Similarity	similarity
protected Set	terms
protected float	value

Constructor Summary

Constructors

Constructor and Description
SpanWeight(SpanQuery query, Searcher searcher)

Method Summary

Methods

Modifier and Type	Method and Description
Explanation	explain(IndexReader reader, int doc) An explanation of the score computation for the named document.
Query	getQuery() The query that this concerns.
float	getValue() The weight for this query.
void	normalize(float queryNorm) Assigns the query normalization factor to this.
Scorer	scorer(IndexReader reader) Constructs a scorer for this.
float	sumOfSquaredWeights() The sum of squared weights of contained query clauses.

Methods inherited from class java.lang.Object

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

Field Detail

similarity

protected Similarity similarity

value

protected float value

idf

protected float idf

queryNorm

protected float queryNorm

queryWeight

protected float queryWeight

terms

protected Set terms

query

protected SpanQuery query

Constructor Detail

SpanWeight

public SpanWeight(SpanQuery query,
          Searcher searcher)
           throws IOException

Throws:

IOException

Method Detail

getQuery

public Query getQuery()

Description copied from interface: Weight

The query that this concerns.

Specified by:

getQuery in interface Weight

getValue

public float getValue()

Description copied from interface: Weight

The weight for this query.

Specified by:

getValue in interface Weight

sumOfSquaredWeights

public float sumOfSquaredWeights()
                          throws IOException

Description copied from interface: Weight

The sum of squared weights of contained query clauses.

Specified by:

sumOfSquaredWeights in interface Weight

Throws:

IOException

normalize

public void normalize(float queryNorm)

Description copied from interface: Weight

Assigns the query normalization factor to this.

Specified by:

normalize in interface Weight

scorer

public Scorer scorer(IndexReader reader)
              throws IOException

Description copied from interface: Weight

Constructs a scorer for this.

Specified by:

scorer in interface Weight

Throws:

IOException

explain

public Explanation explain(IndexReader reader,
                  int doc)
                    throws IOException

Description copied from interface: Weight

An explanation of the score computation for the named document.

Specified by:

explain in interface Weight

Throws:

IOException