Class PathExpr

    • Constructor Detail

      • PathExpr

        public PathExpr()
    • Method Detail

      • evaluate

        public abstract XPathResult evaluate​(XPathContext context)
                                      throws XPathException
        Evaluates the expression and returns the XPath result.
        Specified by:
        evaluate in interface XPathExpression
        Parameters:
        context - The XPathContext to use during evaluation.
        Returns:
        The XPathResult (not null).
        Throws:
        XPathException - if an error occured while evaluating this expression.
      • getPathComponent

        public abstract PathComponent getPathComponent()
        Returns the PathComponent for the this PathExpr, either a FilterExpr or LocationStep.
        Returns:
        the PathComponent for this PathExpr
      • getSubPath

        public abstract PathExpr getSubPath()
      • getDefaultPriority

        public abstract double getDefaultPriority()
        Determines the priority of a PatternExpr as follows:
          From the 19991116 XSLT 1.0 Recommendation:
          + If the pattern has the form of a QName preceded by a
            ChildOrAttributeAxisSpecifier or has the form 
            processing-instruction(Literal) then the priority is 0.
          + If the pattern has the form NCName:* preceded by a 
            ChildOrAttributeAxisSpecifier, then the priority is -0.25
          + Otherwise if the pattern consists of just a NodeTest 
            preceded by a ChildOrAttributeAxisSpecifier then the
            priority is -0.5
          + Otherwise the priority is 0.5
         
        Returns:
        the priority for this PatternExpr
      • isAbsolute

        public abstract boolean isAbsolute()
        Returns true if this PathExpr is an absolute expression, otherwise false (ie. it's a relative expression).
        Returns:
        true if this PathExpr is an absolute expression.
      • matches

        public abstract boolean matches​(XPathNode node,
                                        XPathContext context)
                                 throws XPathException
        Determines if the given node is matched by this MatchExpr with respect to the given context.
        Specified by:
        matches in interface MatchExpression
        Parameters:
        node - the node to determine a match for
        context - the XPathContext
        Returns:
        true if the given node is matched by this MatchExpr
        Throws:
        XPathException - when an error occurs during evaluation