org.apache.lucene.queries.function.valuesource

Class SumTotalTermFreqValueSource

java.lang.Object

org.apache.lucene.queries.function.ValueSource

org.apache.lucene.queries.function.valuesource.SumTotalTermFreqValueSource

public class SumTotalTermFreqValueSource
extends ValueSource

SumTotalTermFreqValueSource returns the number of tokens. (sum of term freqs across all documents, across all terms). Returns -1 if frequencies were omitted for the field, or if the codec doesn't support this statistic.

NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.

Field Summary

Fields

Modifier and Type	Field and Description
protected String	indexedField

Constructor Summary

Constructors

Constructor and Description
SumTotalTermFreqValueSource(String indexedField)

Method Summary

Modifier and Type	Method and Description
void	createWeight(Map context, IndexSearcher searcher) Implementations should propagate createWeight to sub-ValueSources which can optionally store weight info in the context.
String	description() description of field, used in explain()
boolean	equals(Object o)
FunctionValues	getValues(Map context, LeafReaderContext readerContext) Gets the values for this reader and the context that was previously passed to createWeight().
int	hashCode()
String	name()

Methods inherited from class org.apache.lucene.queries.function.ValueSource

asDoubleValuesSource, asLongValuesSource, fromDoubleValuesSource, getSortField, newContext, toString

Methods inherited from class java.lang.Object

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

Field Detail

indexedField

protected final String indexedField

Constructor Detail

SumTotalTermFreqValueSource

public SumTotalTermFreqValueSource(String indexedField)

Method Detail

name

public String name()

description

public String description()

Description copied from class: ValueSource

description of field, used in explain()

Specified by:

description in class ValueSource

getValues

public FunctionValues getValues(Map context,
                                LeafReaderContext readerContext)
                         throws IOException

Description copied from class: ValueSource

Gets the values for this reader and the context that was previously passed to createWeight(). The values must be consumed in a forward docID manner, and you must call this method again to iterate through the values again.

Specified by:

getValues in class ValueSource

Throws:

IOException

createWeight

public void createWeight(Map context,
                         IndexSearcher searcher)
                  throws IOException

Description copied from class: ValueSource

Implementations should propagate createWeight to sub-ValueSources which can optionally store weight info in the context. The context object will be passed to getValues() where this info can be retrieved.

Overrides:

createWeight in class ValueSource

Throws:

IOException

hashCode

public int hashCode()

Specified by:

hashCode in class ValueSource

equals

public boolean equals(Object o)

Specified by:

equals in class ValueSource