org.apache.lucene.queries.function.valuesource
Class NormValueSource
java.lang.Object
org.apache.lucene.queries.function.ValueSource
org.apache.lucene.queries.function.valuesource.NormValueSource
public class NormValueSource
- extends ValueSource
Function that returns TFIDFSimilarity.decodeNormValue(byte)
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.
field
protected final String field
NormValueSource
public NormValueSource(String field)
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
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
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()
- Specified by:
getValues
in class ValueSource
- Throws:
IOException
equals
public boolean equals(Object o)
- Specified by:
equals
in class ValueSource
hashCode
public int hashCode()
- Specified by:
hashCode
in class ValueSource
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