org.apache.lucene.queries.function.valuesource
Class SingleFunction
java.lang.Object
org.apache.lucene.queries.function.ValueSource
org.apache.lucene.queries.function.valuesource.SingleFunction
- Direct Known Subclasses:
- SimpleFloatFunction
public abstract class SingleFunction
- extends ValueSource
A function with a single argument
source
protected final ValueSource source
SingleFunction
public SingleFunction(ValueSource source)
name
protected abstract String name()
description
public String description()
- Description copied from class:
ValueSource
- description of field, used in explain()
- Specified by:
description
in class ValueSource
hashCode
public int hashCode()
- Specified by:
hashCode
in class ValueSource
equals
public boolean equals(Object o)
- Specified by:
equals
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
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