org.apache.xalan.trace

Class PrintTraceListener

Implemented Interfaces:
java.util.EventListener, TraceListener, TraceListenerEx, TraceListenerEx2, TraceListenerEx3

public class PrintTraceListener
extends java.lang.Object
implements TraceListenerEx3

Implementation of the TraceListener interface that prints each event to standard out as it occurs.
See Also:
TracerEvent

Field Summary

boolean
m_traceElements
Set to true if the listener is to print events that occur as each node is 'executed' in the stylesheet.
boolean
m_traceExtension
Set to true if the listener is to print information after each extension event.
boolean
m_traceGeneration
Set to true if the listener is to print information after each result-tree generation event.
boolean
m_traceSelection
Set to true if the listener is to print information after each selection event.
boolean
m_traceTemplates
This needs to be set to true if the listener is to print an event whenever a template is invoked.

Constructor Summary

PrintTraceListener(java.io.PrintWriter pw)
Construct a trace listener.

Method Summary

void
_trace(TracerEvent ev)
Print information about a TracerEvent.
void
extension(ExtensionEvent ev)
Print information about an extension event.
void
extensionEnd(ExtensionEvent ev)
Print information about an extension event.
void
generated(GenerateEvent ev)
Print information about a Generate event.
void
selectEnd(EndSelectionEvent ev)
Method that is called after an xsl:apply-templates or xsl:for-each selection occurs.
void
selected(SelectionEvent ev)
Method that is called just after a select attribute has been evaluated.
void
trace(TracerEvent ev)
Print information about a TracerEvent.
void
traceEnd(TracerEvent ev)
Method that is called when the end of a trace event occurs.

Field Details

m_traceElements

public boolean m_traceElements
Set to true if the listener is to print events that occur as each node is 'executed' in the stylesheet.

m_traceExtension

public boolean m_traceExtension
Set to true if the listener is to print information after each extension event.

m_traceGeneration

public boolean m_traceGeneration
Set to true if the listener is to print information after each result-tree generation event.

m_traceSelection

public boolean m_traceSelection
Set to true if the listener is to print information after each selection event.

m_traceTemplates

public boolean m_traceTemplates
This needs to be set to true if the listener is to print an event whenever a template is invoked.

Constructor Details

PrintTraceListener

public PrintTraceListener(java.io.PrintWriter pw)
Construct a trace listener.
Parameters:
pw - PrintWriter to use for tracing events

Method Details

_trace

public void _trace(TracerEvent ev)
Print information about a TracerEvent.
Parameters:
ev - the trace event.

extension

public void extension(ExtensionEvent ev)
Print information about an extension event.
Specified by:
extension in interface TraceListenerEx3
Parameters:
ev - the extension event to print information about

extensionEnd

public void extensionEnd(ExtensionEvent ev)
Print information about an extension event.
Specified by:
extensionEnd in interface TraceListenerEx3
Parameters:
ev - the extension event to print information about

generated

public void generated(GenerateEvent ev)
Print information about a Generate event.
Specified by:
generated in interface TraceListener
Parameters:
ev - the trace event.

selectEnd

public void selectEnd(EndSelectionEvent ev)
            throws javax.xml.transform.TransformerException
Method that is called after an xsl:apply-templates or xsl:for-each selection occurs.
Specified by:
selectEnd in interface TraceListenerEx
Parameters:
ev - the generate event.

selected

public void selected(SelectionEvent ev)
            throws javax.xml.transform.TransformerException
Method that is called just after a select attribute has been evaluated.
Specified by:
selected in interface TraceListener
Parameters:
ev - the generate event.

trace

public void trace(TracerEvent ev)
Print information about a TracerEvent.
Specified by:
trace in interface TraceListener
Parameters:
ev - the trace event.

traceEnd

public void traceEnd(TracerEvent ev)
Method that is called when the end of a trace event occurs. The method is blocking. It must return before processing continues.
Specified by:
traceEnd in interface TraceListenerEx2
Parameters:
ev - the trace event.

Copyright © 2006 Apache XML Project. All Rights Reserved.