XQueryTraceListener

java.lang.Object
- net.sf.saxon.lib.StandardDiagnostics
- - net.sf.saxon.trace.AbstractTraceListener
  - - net.sf.saxon.trace.XQueryTraceListener

All Implemented Interfaces:

TraceListener
```
public class XQueryTraceListener
extends AbstractTraceListener
```
A Simple trace listener for XQuery that writes messages (by default) to System.err

Field Summary
- Fields inherited from class net.sf.saxon.trace.AbstractTraceListener
  indent, out
- Fields inherited from class net.sf.saxon.lib.StandardDiagnostics
  MAX_MESSAGE_LENGTH, MAX_MESSAGE_LINE_LENGTH, MIN_MESSAGE_LINE_LENGTH, TARGET_MESSAGE_LINE_LENGTH

Constructor Summary

Constructors
Constructor Description

XQueryTraceListener()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`void`	`endRuleSearch(java.lang.Object rule, Mode mode, Item item)`	Called at the end of a rule search
`protected java.lang.String`	`getOpeningAttributes()`	Generate attributes to be included in the opening trace element
`void`	`startRuleSearch()`	Called at the start of a rule search
`protected java.lang.String`	`tag(Traceable info)`	Get the trace element tagname to be used for a particular construct.

Methods inherited from class net.sf.saxon.trace.AbstractTraceListener
close, endCurrentItem, enter, escape, getOutputDestination, isApplicable, leave, level, open, setLevelOfDetail, setOutputDestination, spaces, startCurrentItem

Methods inherited from class net.sf.saxon.lib.StandardDiagnostics
abbreviateLocationURI, abbreviateLocationURIDefault, expandSpecialCharacters, formatListOfOffendingNodes, getInstructionName, getInstructionNameDefault, getLocationMessageText, logStackTrace, showOriginator, wordWrap

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

- Constructor Detail
  - XQueryTraceListener
```
public XQueryTraceListener()
```
- Method Detail
  - getOpeningAttributes
```
protected java.lang.String getOpeningAttributes()
```
    Generate attributes to be included in the opening trace element
    
    Specified by:
    
    getOpeningAttributes in class AbstractTraceListener
  - tag
```
protected java.lang.String tag(Traceable info)
```
    Get the trace element tagname to be used for a particular construct. Return null for trace events that are ignored by this trace listener.
    
    Specified by:
    
    tag in class AbstractTraceListener
    
    Parameters:
    
    info - trace information
  - startRuleSearch
```
public void startRuleSearch()
```
    Called at the start of a rule search
    
    Specified by:
    
    startRuleSearch in interface TraceListener
    
    Overrides:
    
    startRuleSearch in class AbstractTraceListener
  - endRuleSearch
```
public void endRuleSearch(java.lang.Object rule,
                          Mode mode,
                          Item item)
```
    Called at the end of a rule search
    
    Specified by:
    
    endRuleSearch in interface TraceListener
    
    Overrides:
    
    endRuleSearch in class AbstractTraceListener
    
    Parameters:
    
    rule - the rule that has been selected
    
    mode - the mode in operation
    
    item - the item that was checked against