Class ExpressionVisitor


  • public class ExpressionVisitor
    extends XPathVisitor
    When StylesheetHandler creates an XPath, the ExpressionVisitor visits the XPath expression. For any extension functions it encounters, it instructs StylesheetRoot to register the extension namespace. This mechanism is required to locate extension functions that may be embedded within an expression.
    • Constructor Detail

      • ExpressionVisitor

        public ExpressionVisitor​(StylesheetRoot sroot)
        The constructor sets the StylesheetRoot variable which is used to register extension namespaces.
        Parameters:
        sroot - the StylesheetRoot that is being constructed.
    • Method Detail

      • visitFunction

        public boolean visitFunction​(ExpressionOwner owner,
                                     Function func)
        If the function is an extension function, register the namespace.
        Overrides:
        visitFunction in class XPathVisitor
        Parameters:
        owner - The current XPath object that owns the expression.
        func - The function currently being visited.
        Returns:
        true to continue the visit in the subtree, if any.