Class MotionlessFeed

  • All Implemented Interfaces:
    javax.xml.transform.Result, Receiver

    public class MotionlessFeed
    extends ItemFeed
    A feed for an expression that typically accesses the context item but does not consume the input stream. This class only ever appears as the first thing triggered by a watch. It evaluates the non-consuming expression immediately when the start event is reported, supplying the items that result from the evaluation to the next feed in the pipeline.
    • Method Detail

      • startSelectedParentNode

        public Receiver startSelectedParentNode​(FleetingParentNode node,
                                                Location locationId)
                                         throws XPathException
        Signal that an element or document node has been found that matches the selection that this Watch is looking for. This method is called by the WatchManager while processing the startElement or startDocument event that matches the selection.
        startSelectedParentNode in class ItemFeed
        node - the element or document node whose start event has been matched
        locationId - the location associated with the element or document node (may be the location of the instruction that created it)
        a Receiver to be notified of all events starting with the startElement/startDocument event for the matched element, and ending with the endElement event for that element; or null if this feature is not required.
        XPathException - May be raised if a dynamic error occurs
      • append

        public void append​(Item item)
                    throws XPathException
        Supply one item towards the streamed input of the expression
        Specified by:
        append in interface Receiver
        Specified by:
        append in class ItemFeed
        item - the item to be supplied
        XPathException - if the operation fails
      • endSelectedParentNode

        public void endSelectedParentNode​(Location locationId)
                                   throws XPathException
        Description copied from class: ItemFeed
        Signal that the endElement event has occurred for the element whose startElement event caused the Watch to be activated.
        endSelectedParentNode in class ItemFeed
        locationId - the location of the element
        XPathException - May be raised if a constraint implemented by this Watch is violated