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## net.sf.saxon.pull
Class PullTracer

    java.lang.Object
      net.sf.saxon.pull.PullFilter
          net.sf.saxon.pull.PullTracer

All Implemented Interfaces:
  PullProvider

public class PullTracer
extends PullFilter

PullTracer is a PullFilter that can be inserted into a pull pipeline for diagnostic purposes. It traces all the events as they are read, writing details to System.err

Field Summary

Fields inherited from class net.sf.saxon.pull.PullFilter
`currentEvent`

Fields inherited from interface net.sf.saxon.pull.PullProvider
`ATOMIC_VALUE, ATTRIBUTE, COMMENT, END_DOCUMENT, END_ELEMENT, END_OF_INPUT, NAMESPACE, PROCESSING_INSTRUCTION, START_DOCUMENT, START_ELEMENT, START_OF_INPUT, TEXT`

Constructor Summary
`PullTracer(PullProvider base)` Create a PullTracer

Method Summary
`int` | `next()` Get the next event.

Methods inherited from class net.sf.saxon.pull.PullFilter
`close, current, getAtomicValue, getAttributes, getFingerprint, getNameCode, getNamePool, getNamespaceDeclarations, getPipelineConfiguration, getSourceLocator, getStringValue, getTypeAnnotation, getUnderlyingProvider, setPipelineConfiguration, skipToMatchingEnd`

Methods inherited from class java.lang.Object
`clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

Constructor Detail

### PullTracer

    public PullTracer(PullProvider base)

  Create a PullTracer

Parameters:
  `base` - the PullProvider to which requests are to be passed

Method Detail

### next

    public int 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 `PullProvider.END_OF_INPUT` is returned at the end of the sequence.
  Throws:
    `XPathException`

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