Class StringCast

  • All Implemented Interfaces:
    Function
    Direct Known Subclasses:
    StringCast

    public class StringCast
    extends CastFunction
    A Function that tries to cast its argument to an xsd:string.
    Author:
    Arjohn Kampman, Jeen Broekstra
    • Constructor Detail

      • StringCast

        public StringCast()
    • Method Detail

      • convert

        protected Literal convert​(ValueFactory valueFactory,
                                  Value value)
                           throws ValueExprEvaluationException
        Description copied from class: CastFunction
        Convert the supplied value to a literal of the function output datatype.
        Specified by:
        convert in class CastFunction
        Parameters:
        valueFactory - the valueFactory to use
        value - 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.
      • getXsdDatatype

        protected IRI getXsdDatatype()
        Description copied from class: CastFunction
        Get the specific XML Schema datatype which this function returns.
        Specified by:
        getXsdDatatype in class CastFunction
        Returns:
        an XML Schema datatype IRI
      • isValidForDatatype

        protected boolean isValidForDatatype​(String lexicalValue)
        Description copied from class: CastFunction
        Verifies that the supplied lexical value is valid for the datatype.
        Specified by:
        isValidForDatatype in class CastFunction
        Parameters:
        lexicalValue - a lexical value
        Returns:
        true if the lexical value is valid for the datatype, false otherwise.