net.sf.saxon.evpull
Class PullEventTracer

java.lang.Object
  extended by net.sf.saxon.evpull.PullEventTracer
All Implemented Interfaces:
EventIterator, PullEvent

public class PullEventTracer
extends Object
implements EventIterator

Diagnostic class to display the sequence of events reported by an EventIterator


Constructor Summary
PullEventTracer(EventIterator base, Configuration config)
          Create a tracer for pull events
 
Method Summary
 boolean isFlatSequence()
          Determine whether the EventIterator returns a flat sequence of events, or whether it can return nested event iterators
static void main(String[] args)
          Main method for testing only
 PullEvent next()
          Get the next event in the sequence
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

PullEventTracer

public PullEventTracer(EventIterator base,
                       Configuration config)
Create a tracer for pull events

Parameters:
base - the event iterator whose events are to be traced
config - the Saxon configuration
Method Detail

next

public PullEvent next()
               throws XPathException
Get the next event in the sequence

Specified by:
next in interface EventIterator
Returns:
the next event, or null when the sequence is exhausted. Note that since an EventIterator is itself a PullEvent, this method may return a nested iterator.
Throws:
XPathException - if a dynamic evaluation error occurs

isFlatSequence

public boolean isFlatSequence()
Determine whether the EventIterator returns a flat sequence of events, or whether it can return nested event iterators

Specified by:
isFlatSequence in interface EventIterator
Returns:
true if the next() method is guaranteed never to return an EventIterator

main

public static void main(String[] args)
                 throws Exception
Main method for testing only

Parameters:
args - not used
Throws:
Exception


Copyright (c) 2004-2010 Saxonica Limited. All rights reserved.