Package net.sf.saxon.pull

Class PullPushTee

java.lang.Object
net.sf.saxon.pull.PullFilter
net.sf.saxon.pull.PullPushTee
All Implemented Interfaces:
PullProvider
public class PullPushTee extends PullFilter
PullPushTee is a pass-through filter class that links one PullProvider to another PullProvider in a pipeline, copying all events that are read into a push pipeline, supplied in the form of a Receiver.

This class can be used to insert a schema validator into a pull pipeline, since Saxon's schema validation is push-based. It could also be used to insert a serializer into the pipeline, allowing the XML document being "pulled" to be displayed for diagnostic purposes.

  • Constructor Details

    • PullPushTee

      public PullPushTee(PullProvider base, Receiver branch)
      Create a PullPushTee
      Parameters:
      base - the PullProvider to which requests are to be passed
      branch - the Receiver to which all events are to be copied, as "push" events. This Receiver must already be open before use

  • Method Details

    • getReceiver

      public Receiver getReceiver()
      Get the Receiver to which events are being tee'd.
      Returns:
      the Receiver

    • next

      public PullEvent next() throws XPathException
      Get the next event. This implementation gets the next event from the underlying PullProvider, copies it to the branch Receiver, and then returns the event to the caller.
      Specified by:
      next in interface PullProvider
      Overrides:
      next in class PullFilter
      Returns:
      an integer code indicating the type of event. The code PullEvent.END_OF_INPUT is returned at the end of the sequence.
      Throws:
      XPathException - if a dynamic error occurs