Class SystemFunctionCall.Optimized

    • Method Detail

      • optimize

        public Expression optimize​(ExpressionVisitor visitor,
                                   ContextItemStaticInfo contextInfo)
                            throws XPathException
        Description copied from class: FunctionCall
        Perform optimisation of an expression and its subexpressions.

        This method is called after all references to functions and variables have been resolved to the declaration of the function or variable, and after all type checking has been done.

        optimize in class SystemFunctionCall
        visitor - an expression visitor
        contextInfo - the static type of "." at the point where this expression is invoked. The parameter is set to null if it is known statically that the context item will be undefined. If the type of the context item is not known statically, the argument is set to Type.ITEM_TYPE
        the original expression, rewritten if appropriate to optimize execution
        XPathException - if an error is discovered during this phase (typically a type error)