Class IDFValueSource
java.lang.Object
org.apache.lucene.queries.function.ValueSource
org.apache.lucene.queries.function.valuesource.DocFreqValueSource
org.apache.lucene.queries.function.valuesource.IDFValueSource
Function that returns
#idf(long, long)
for every document.
Note that the configured Similarity for the field must be a subclass of TFIDFSimilarity
- NOTE: This API is for internal purposes only and might change in incompatible ways in the next release.
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Field Summary
Fields inherited from class org.apache.lucene.queries.function.valuesource.DocFreqValueSource
field, indexedBytes, indexedField, val
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Constructor Summary
ConstructorDescriptionIDFValueSource
(String field, String val, String indexedField, BytesRef indexedBytes) -
Method Summary
Methods inherited from class org.apache.lucene.queries.function.valuesource.DocFreqValueSource
createWeight, description, equals, hashCode
Methods inherited from class org.apache.lucene.queries.function.ValueSource
asDoubleValuesSource, asLongValuesSource, fromDoubleValuesSource, getSortField, newContext, toString
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Constructor Details
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IDFValueSource
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Method Details
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name
- Overrides:
name
in classDocFreqValueSource
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getValues
public FunctionValues getValues(Map<Object, Object> context, LeafReaderContext readerContext) throws IOExceptionDescription 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.- Overrides:
getValues
in classDocFreqValueSource
- Throws:
IOException
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