Class FunctionOneArg

    • Field Detail

      • m_arg0

        Expression m_arg0
        The first argument passed to the function (at index 0).
    • Constructor Detail

      • FunctionOneArg

        public FunctionOneArg()
    • Method Detail

      • setArg

        public void setArg​(Expression arg,
                           int argNum)
                    throws WrongNumberArgsException
        Set an argument expression for a function. This method is called by the XPath compiler.
        Overrides:
        setArg in class Function
        Parameters:
        arg - non-null expression that represents the argument.
        argNum - The argument number index.
        Throws:
        WrongNumberArgsException - If the argNum parameter is beyond what is specified for this function.
      • 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 Function
        Parameters:
        argNum - The number of arguments that is being passed to the function.
        Throws:
        WrongNumberArgsException - if any
      • reportWrongNumberArgs

        protected void reportWrongNumberArgs()
                                      throws WrongNumberArgsException
        Constructs and throws a WrongNumberArgException with the appropriate message for this function object. This method is meant to be overloaded by derived classes so that the message will be as specific as possible.
        Overrides:
        reportWrongNumberArgs in class 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 Expression
        Returns:
        true if traversal outside the context node's subtree can occur.
      • deepEquals

        public boolean deepEquals​(Expression expr)
        Compare this object with another object and see if they are equal, include the sub heararchy.
        Overrides:
        deepEquals in class Function
        Parameters:
        expr - Another expression object.
        Returns:
        true if this objects class and the expr object's class are the same, and the data contained within both objects are considered equal.