Class FunctionDef1Arg

    • Constructor Detail

      • FunctionDef1Arg

        public FunctionDef1Arg()
    • Method Detail

      • getArg0AsNode

        protected int getArg0AsNode​(XPathContext xctxt)
                             throws javax.xml.transform.TransformerException
        Execute the first argument expression that is expected to return a nodeset. If the argument is null, then return the current context node.
        Parameters:
        xctxt - Runtime XPath context.
        Returns:
        The first node of the executed nodeset, or the current context node if the first argument is null.
        Throws:
        javax.xml.transform.TransformerException - if an error occurs while executing the argument expression.
      • getArg0AsString

        protected XString getArg0AsString​(XPathContext xctxt)
                                   throws javax.xml.transform.TransformerException
        Execute the first argument expression that is expected to return a string. If the argument is null, then get the string value from the current context node.
        Parameters:
        xctxt - Runtime XPath context.
        Returns:
        The string value of the first argument, or the string value of the current context node if the first argument is null.
        Throws:
        javax.xml.transform.TransformerException - if an error occurs while executing the argument expression.
      • getArg0AsNumber

        protected double getArg0AsNumber​(XPathContext xctxt)
                                  throws javax.xml.transform.TransformerException
        Execute the first argument expression that is expected to return a number. If the argument is null, then get the number value from the current context node.
        Parameters:
        xctxt - Runtime XPath context.
        Returns:
        The number value of the first argument, or the number value of the current context node if the first argument is null.
        Throws:
        javax.xml.transform.TransformerException - if an error occurs while executing the argument expression.
      • checkNumberArgs

        public void checkNumberArgs​(int argNum)
                             throws WrongNumberArgsException
        Check that the number of arguments passed to this function is correct. This method is meant to be overloaded by derived classes, to check for the number of arguments for a specific function type. This method is called by the compiler for static number of arguments checking.
        Overrides:
        checkNumberArgs in class FunctionOneArg
        Parameters:
        argNum - The number of arguments that is being passed to the function.
        Throws:
        WrongNumberArgsException - if any
      • canTraverseOutsideSubtree

        public boolean canTraverseOutsideSubtree()
        Tell if this expression or it's subexpressions can traverse outside the current subtree.
        Overrides:
        canTraverseOutsideSubtree in class FunctionOneArg
        Returns:
        true if traversal outside the context node's subtree can occur.