CodeInjector (saxon JavaDoc)

All Known Implementing Classes:

TimingCodeInjector, TraceCodeInjector, XSLTTraceCodeInjector
```
public interface CodeInjector
```
A code injector can be used to add code to the expression tree (for example, diagnostic tracing code) during the process of parsing and tree construction

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`Expression`	`inject(Expression exp, StaticContext env, int construct, StructuredQName qName)`	If tracing, wrap an expression in a trace instruction
`Clause`	`injectClause(Clause target, StaticContext env, Container container)`	Insert a tracing clause into a FLWOR expression

- Method Detail
  - inject
```
Expression inject(Expression exp,
                  StaticContext env,
                  int construct,
                  StructuredQName qName)
```
    If tracing, wrap an expression in a trace instruction
    
    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:
    
    a replacement for the original expression (or the original expression unchanged)
  - injectClause
```
Clause injectClause(Clause target,
                    StaticContext env,
                    Container container)
```
    Insert a tracing clause into a FLWOR expression