Class SystemProperty

    • Constructor Detail

      • SystemProperty

        public SystemProperty()
    • Method Detail

      • preEvaluate

        public Expression preEvaluate​(ExpressionVisitor visitor)
                               throws XPathException
        preEvaluate: this method performs compile-time evaluation for properties in the XSLT namespace only
        Overrides:
        preEvaluate in class FunctionCall
        Parameters:
        visitor - an expression visitor
        Returns:
        the result of the early evaluation, or the original expression, or potentially a simplified expression
        Throws:
        XPathException
      • evaluateItem

        public Item evaluateItem​(XPathContext context)
                          throws XPathException
        Evaluate the function at run-time
        Specified by:
        evaluateItem in interface EvaluableItem
        Overrides:
        evaluateItem in class Expression
        Parameters:
        context - The context in which the expression is to be evaluated
        Returns:
        the node or atomic value that results from evaluating the expression; or null to indicate that the result is an empty sequence
        Throws:
        XPathException - if any dynamic error occurs evaluating the expression
      • getProperty

        public static java.lang.String getProperty​(java.lang.String uri,
                                                   java.lang.String local,
                                                   Configuration config)
        Here's the real code:
        Parameters:
        uri - the namespace URI of the system property name
        local - the local part of the system property name
        config - the Saxon configuration
        Returns:
        the value of the corresponding system property