PullTracer

java.lang.Object
- net.sf.saxon.pull.PullFilter
- - com.saxonica.xqj.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

- Nested Class Summary
  - Nested classes/interfaces inherited from interface net.sf.saxon.pull.PullProvider
    PullProvider.Event
- Field Summary
  - Fields inherited from class net.sf.saxon.pull.PullFilter
    currentEvent
- Constructor Summary
  
  Constructors
  Constructor Description
  
  PullTracer(PullProvider base)
  Create a PullTracer
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  PullProvider.Event next()
  Get the next event.
  - Methods inherited from class net.sf.saxon.pull.PullFilter
    close, current, getAtomicValue, getAttributes, getNamePool, getNamespaceDeclarations, getNodeName, getPipelineConfiguration, getSchemaType, getSourceLocator, getStringValue, getUnderlyingProvider, getUnparsedEntities, 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 PullProvider.Event 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.Event.END_OF_INPUT is returned at the end of the sequence.
    
    Throws:
    
    XPathException - if a dynamic error occurs