Class IDFValueSource
- java.lang.Object
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- org.apache.lucene.queries.function.ValueSource
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- org.apache.lucene.queries.function.valuesource.DocFreqValueSource
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- org.apache.lucene.queries.function.valuesource.IDFValueSource
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public class IDFValueSource extends DocFreqValueSource
Function that returns#idf(long, long)
for every document.Note that the configured Similarity for the field must be a subclass of
TFIDFSimilarity
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Constructor Summary
Constructors Constructor Description IDFValueSource(String field, String val, String indexedField, BytesRef indexedBytes)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description FunctionValues
getValues(Map context, AtomicReaderContext readerContext)
Gets the values for this reader and the context that was previously passed to createWeight()String
name()
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Methods inherited from class org.apache.lucene.queries.function.valuesource.DocFreqValueSource
createWeight, description, equals, hashCode
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Methods inherited from class org.apache.lucene.queries.function.ValueSource
getSortField, newContext, toString
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Method Detail
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name
public String name()
- Overrides:
name
in classDocFreqValueSource
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getValues
public FunctionValues getValues(Map context, AtomicReaderContext readerContext) throws IOException
Description copied from class:ValueSource
Gets the values for this reader and the context that was previously passed to createWeight()- Overrides:
getValues
in classDocFreqValueSource
- Throws:
IOException
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