net.sf.saxon.event
Class ContentHandlerProxy.ContentHandlerProxyTraceListener

java.lang.Object
  net.sf.saxon.event.ContentHandlerProxy.ContentHandlerProxyTraceListener

All Implemented Interfaces:

EventListener, TraceListener

Enclosing class:

ContentHandlerProxy

public class ContentHandlerProxy.ContentHandlerProxyTraceListener
extends Object
implements TraceListener

Create a TraceListener that will collect information about the current location in the source document. This is used to provide information to the receiving application for diagnostic purposes.

Constructor Summary

ContentHandlerProxy.ContentHandlerProxyTraceListener()

Method Summary

void	close() Method called at the end of execution, that is, when the run-time execution ends
void	endCurrentItem(Item currentItem) Method that is called when an instruction has finished processing a new current item and is ready to select a new current item or revert to the previous current item.
void	enter(InstructionInfo instruction, XPathContext context) Method that is called when an instruction in the stylesheet gets processed.
Stack	getContextItemStack() Get the context item stack
void	leave(InstructionInfo instruction) Method that is called after processing an instruction of the stylesheet, that is, after any child instructions have been processed.
void	open() Method called at the start of execution, that is, when the run-time transformation starts
void	startCurrentItem(Item currentItem) Method that is called by an instruction that changes the current item in the source document: that is, xsl:for-each, xsl:apply-templates, xsl:for-each-group.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ContentHandlerProxy.ContentHandlerProxyTraceListener

public ContentHandlerProxy.ContentHandlerProxyTraceListener()

Method Detail

getContextItemStack

public Stack getContextItemStack()

Get the context item stack

Returns:

the context item stack

open

public void open()

Method called at the start of execution, that is, when the run-time transformation starts

Specified by:

open in interface TraceListener

close

public void close()

Method called at the end of execution, that is, when the run-time execution ends

Specified by:

close in interface TraceListener

enter

public void enter(InstructionInfo instruction,
                  XPathContext context)

Method that is called when an instruction in the stylesheet gets processed.

Specified by:

enter in interface TraceListener

Parameters:

instruction - gives information about the instruction being executed, and about the context in which it is executed. This object is mutable, so if information from the InstructionInfo is to be retained, it must be copied.

leave

public void leave(InstructionInfo instruction)

Method that is called after processing an instruction of the stylesheet, that is, after any child instructions have been processed.

Specified by:

leave in interface TraceListener

Parameters:

instruction - gives the same information that was supplied to the enter method, though it is not necessarily the same object. Note that the line number of the instruction is that of the start tag in the source stylesheet, not the line number of the end tag.

startCurrentItem

public void startCurrentItem(Item currentItem)

Method that is called by an instruction that changes the current item in the source document: that is, xsl:for-each, xsl:apply-templates, xsl:for-each-group. The method is called after the enter method for the relevant instruction, and is called once for each item processed.

Specified by:

startCurrentItem in interface TraceListener

Parameters:

currentItem - the new current item. Item objects are not mutable; it is safe to retain a reference to the Item for later use.

endCurrentItem

public void endCurrentItem(Item currentItem)

Method that is called when an instruction has finished processing a new current item and is ready to select a new current item or revert to the previous current item. The method will be called before the leave() method for the instruction that made this item current.

Specified by:

endCurrentItem in interface TraceListener

Parameters:

currentItem - the item that was current, whose processing is now complete. This will represent the same underlying item as the corresponding startCurrentItem() call, though it will not necessarily be the same actual object.