net.sf.saxon.trace
Class TraceCodeInjector

java.lang.Object
  net.sf.saxon.trace.TraceCodeInjector

All Implemented Interfaces:

CodeInjector

Direct Known Subclasses:

TimingCodeInjector, XSLTTraceCodeInjector

public class TraceCodeInjector
extends Object
implements CodeInjector

A code injector that wraps every expression (other than a literal) in a TraceExpression, which causes a TraceListener to be notified when the expression is evaluated

Constructor Summary

TraceCodeInjector()

Method Summary

Expression

inject(Expression exp, StaticContext env, int construct, StructuredQName qName) If tracing, wrap an expression in a trace instruction

Methods inherited from class java.lang.Object

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

Constructor Detail

TraceCodeInjector

public TraceCodeInjector()

Method Detail

inject

public Expression inject(Expression exp,
                         StaticContext env,
                         int construct,
                         StructuredQName qName)

If tracing, wrap an expression in a trace instruction

Specified by:

inject in interface CodeInjector

Parameters:

exp - the expression to be wrapped

env - the static context

construct - integer constant identifying the kind of construct

qName - the name of the construct (if applicable)

Returns:

the expression that does the tracing