Package org.apache.lucene.queries.function.valuesource

Class TotalTermFreqValueSource

java.lang.Object

org.apache.lucene.queries.function.ValueSource

org.apache.lucene.queries.function.valuesource.TotalTermFreqValueSource

public class TotalTermFreqValueSource
extends ValueSource

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

Constructor Summary

Constructors

Constructor	Description
TotalTermFreqValueSource(java.lang.String field, java.lang.String val, java.lang.String indexedField, BytesRef indexedBytes)

Method Summary

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

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

getSortField, newContext, toString

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

TotalTermFreqValueSource

public TotalTermFreqValueSource(java.lang.String field,
                                java.lang.String val,
                                java.lang.String indexedField,
                                BytesRef indexedBytes)

Method Detail

name

public java.lang.String name()

description

public java.lang.String description()

Description copied from class: ValueSource

description of field, used in explain()

Specified by:

description in class ValueSource

getValues

public FunctionValues getValues(java.util.Map context,
                                AtomicReaderContext readerContext)
                         throws java.io.IOException

Description copied from class: ValueSource

Gets the values for this reader and the context that was previously passed to createWeight()

Specified by:

getValues in class ValueSource

Throws:

java.io.IOException

createWeight

public void createWeight(java.util.Map context,
                         IndexSearcher searcher)
                  throws java.io.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:

java.io.IOException

hashCode

public int hashCode()

Specified by:

hashCode in class ValueSource

equals

public boolean equals(java.lang.Object o)

Specified by:

equals in class ValueSource