Class BooleanCast
java.lang.Object
org.eclipse.rdf4j.query.algebra.evaluation.function.xsd.CastFunction
org.eclipse.rdf4j.query.algebra.evaluation.function.xsd.BooleanCast
- All Implemented Interfaces:
Function
- Direct Known Subclasses:
BooleanCast
A
Function that tries to cast its argument to an
xsd:boolean.- Author:
- Arjohn Kampman, Jeen Broekstra
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionprotected Literalconvert(ValueFactory valueFactory, Value value) Convert the supplied value to a literal of the function output datatype.protected IRIGet the specific XML Schema datatype which this function returns.protected booleanisValidForDatatype(String lexicalValue) Verifies that the supplied lexical value is valid for the datatype.Methods inherited from class org.eclipse.rdf4j.query.algebra.evaluation.function.xsd.CastFunction
evaluate, getURI, getXsdName, typeErrorMethods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitMethods inherited from interface org.eclipse.rdf4j.query.algebra.evaluation.function.Function
evaluate, mustReturnDifferentResult
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Constructor Details
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BooleanCast
public BooleanCast()
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Method Details
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convert
protected Literal convert(ValueFactory valueFactory, Value value) throws ValueExprEvaluationException Description copied from class:CastFunctionConvert the supplied value to a literal of the function output datatype.- Specified by:
convertin classCastFunction- Parameters:
valueFactory- the valueFactory to usevalue- a value that is not a string-typed literal, and not a literal of the same datatype as the function output datatype.- Returns:
- a literal value of the function output datatype
- Throws:
ValueExprEvaluationException- if an error occurs in conversion.
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getXsdDatatype
Description copied from class:CastFunctionGet the specific XML Schema datatype which this function returns.- Specified by:
getXsdDatatypein classCastFunction- Returns:
- an XML Schema datatype IRI
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isValidForDatatype
Description copied from class:CastFunctionVerifies that the supplied lexical value is valid for the datatype.- Specified by:
isValidForDatatypein classCastFunction- Parameters:
lexicalValue- a lexical value- Returns:
- true if the lexical value is valid for the datatype, false otherwise.
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