Class ComparisonBoolFunction
java.lang.Object
org.apache.lucene.queries.function.ValueSource
org.apache.lucene.queries.function.valuesource.BoolFunction
org.apache.lucene.queries.function.valuesource.ComparisonBoolFunction
Base class for comparison operators useful within an "if"/conditional.
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionabstract booleancompare(int doc, FunctionValues lhs, FunctionValues rhs) Perform the comparison, returning true or falsevoidcreateWeight(Map<Object, Object> context, IndexSearcher searcher) Implementations should propagate createWeight to sub-ValueSources which can optionally store weight info in the context.description of field, used in explain()booleangetValues(Map<Object, Object> context, LeafReaderContext readerContext) Gets the values for this reader and the context that was previously passed to createWeight().inthashCode()name()Uniquely identify the operation (ie "gt", "lt" "gte", etc)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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ComparisonBoolFunction
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Method Details
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compare
Perform the comparison, returning true or false- Throws:
IOException
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name
Uniquely identify the operation (ie "gt", "lt" "gte", etc) -
getValues
public FunctionValues getValues(Map<Object, Object> context, LeafReaderContext readerContext) throws IOExceptionDescription copied from class:ValueSourceGets 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.- Specified by:
getValuesin classValueSource- Throws:
IOException
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equals
- Specified by:
equalsin classValueSource
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hashCode
public int hashCode()- Specified by:
hashCodein classValueSource
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description
Description copied from class:ValueSourcedescription of field, used in explain()- Specified by:
descriptionin classValueSource
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createWeight
Description copied from class:ValueSourceImplementations 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:
createWeightin classValueSource- Throws:
IOException
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