Class ExistingPalindromeFunction
- java.lang.Object
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- org.eclipse.rdf4j.examples.function.ExistingPalindromeFunction
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Constructor Summary
Constructors Constructor Description ExistingPalindromeFunction()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Valueevaluate(ValueFactory valueFactory, Value... args)Evaluate the function over the supplied input arguments, using the suppliedValueFactoryto produce the result.Valueevaluate(TripleSource tripleSource, Value... args)Executes the existingPalindrome function.StringgetURI()return the URI 'http://example.org/custom-function/existingPalindrome' as a String
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Field Detail
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NAMESPACE
public static final String NAMESPACE
- See Also:
- Constant Field Values
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Method Detail
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getURI
public String getURI()
return the URI 'http://example.org/custom-function/existingPalindrome' as a String
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evaluate
public Value evaluate(TripleSource tripleSource, Value... args) throws ValueExprEvaluationException
Executes the existingPalindrome function.- Specified by:
evaluatein interfaceFunction- Parameters:
tripleSource- theTripleSourceused in the query evaluation. This can be used to access the current state of the store.args- the function input arguments.- Returns:
- A boolean literal representing true if the input argument is a palindrome and exists in the database, false otherwise.
- Throws:
ValueExprEvaluationException- if more than one argument is supplied or if the supplied argument is not a literal.
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evaluate
public Value evaluate(ValueFactory valueFactory, Value... args) throws ValueExprEvaluationException
Description copied from interface:FunctionEvaluate the function over the supplied input arguments, using the suppliedValueFactoryto produce the result.- Specified by:
evaluatein interfaceFunction- Parameters:
valueFactory- aValueFactoryto use for producing the function result.args- the function input arguments.- Returns:
- the function result value.
- Throws:
ValueExprEvaluationException
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