Class NoOpenOrCloseFeed

All Implemented Interfaces:
Result, Receiver

public class NoOpenOrCloseFeed extends ItemFeed
This feed is used for the inner loop of a for-each, where the results of multiple iterations need to be concatenated into a single sequence. This means we don't want a call on open/close around each inner iteration. So this feed suppresses these calls, preventing them cascading up the pipeline.
  • Constructor Details

  • Method Details

    • open

      public void open(Terminator terminator)
      Description copied from class: ItemFeed
      Start evaluating the expression. The default implementation does nothing.
      Overrides:
      open in class ItemFeed
      Parameters:
      terminator - used to achieve early exit
    • startSelectedParentNode

      public Receiver startSelectedParentNode(FleetingParentNode node, Location locationId) throws XPathException
      Description copied from class: ItemFeed
      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.
      Overrides:
      startSelectedParentNode in class ItemFeed
      Parameters:
      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)
      Returns:
      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.
      Throws:
      XPathException - May be raised if a dynamic error occurs
    • append

      public void append(Item item) throws XPathException
      Description copied from class: ItemFeed
      Supply one item towards the streamed input of the expression
      Specified by:
      append in interface Receiver
      Specified by:
      append in class ItemFeed
      Parameters:
      item - the item to be supplied
      Throws:
      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.
      Overrides:
      endSelectedParentNode in class ItemFeed
      Parameters:
      locationId - the location of the element
      Throws:
      XPathException - May be raised if a constraint implemented by this Watch is violated
    • close

      public void close()
      Description copied from class: ItemFeed
      Finish evaluating the expression.
      Specified by:
      close in interface Receiver
      Overrides:
      close in class ItemFeed