Class NotFn

    • Constructor Detail

      • NotFn

        public NotFn()
    • Method Detail

      • supplyTypeInformation

        public void supplyTypeInformation​(ExpressionVisitor visitor,
                                          ContextItemStaticInfo contextItemType,
                                          Expression[] arguments)
                                   throws XPathException
        Description copied from class: SystemFunction
        Method called during static type checking. This method may be implemented in subclasses so that functions can take advantage of knowledge of the types of the arguments that will be supplied.
        Overrides:
        supplyTypeInformation in class SystemFunction
        Parameters:
        visitor - an expression visitor, providing access to the static context and configuration
        contextItemType - information about whether the context item is set, and what its type is
        arguments - the expressions appearing as arguments in the function call
        Throws:
        XPathException - if an error is detected
      • call

        public BooleanValue call​(XPathContext context,
                                 Sequence[] arguments)
                          throws XPathException
        Evaluate the expression
        Parameters:
        context - the dynamic evaluation context
        arguments - the values of the arguments, supplied as Sequences
        Returns:
        the result of the evaluation, in the form of a Sequence
        Throws:
        XPathException - if a dynamic error occurs during the evaluation of the expression
      • makeFunctionCall

        public Expression makeFunctionCall​(Expression[] arguments)
        Make an expression that either calls this function, or that is equivalent to a call on this function
        Overrides:
        makeFunctionCall in class SystemFunction
        Parameters:
        arguments - the supplied arguments to the function call
        Returns:
        either a function call on this function, or an expression that delivers the same result
      • makeOptimizedFunctionCall

        public Expression makeOptimizedFunctionCall​(ExpressionVisitor visitor,
                                                    ContextItemStaticInfo contextInfo,
                                                    Expression... arguments)
                                             throws XPathException
        Allow the function to create an optimized call based on the values of the actual arguments
        Overrides:
        makeOptimizedFunctionCall in class SystemFunction
        Parameters:
        visitor - the expression visitor
        contextInfo - information about the context item
        arguments - the supplied arguments to the function call
        Returns:
        either a function call on this function, or an expression that delivers the same result, or null indicating that no optimization has taken place
        Throws:
        XPathException - if an error is detected
      • getStreamerName

        public java.lang.String getStreamerName()
        Description copied from class: SystemFunction
        Get a name that identifies the class that can be used to evaluate this function in streaming mode, that is, supplying one item or event at a time as it is delivered by the parser. Special streaming support is generally available in Saxon-EE for all system functions that take a sequence as their argument.
        Overrides:
        getStreamerName in class SystemFunction
        Returns:
        a name that identifies a class that supports streamed evaluation of this system function, or null if no such class is available. The mapping of names to classes is defined in the Saxon-EE class StreamerMap. In non-streaming Saxon editions (HE and PE) the method always returns null.
      • getElaborator

        public Elaborator getElaborator()
        Make an elaborator for a system function call on this function
        Overrides:
        getElaborator in class SystemFunction
        Returns:
        a suitable elaborator; or null if no custom elaborator is available