Eclipse AspectJ: Aspect-Oriented Programming with AspectJ and the Eclipse AspectJ Development Tools

Appendix B. AspectJ Language Quick Reference

Aspect Declaration

[ privileged ] [ Modifiers ] aspect id
[extends Type] [implements TypeList]
[PerClause] { Body }

Table B.1. Per Clauses

Per Clause	Meaning
[issingleton()]	One aspect instance.
perthis(pointcut-expression)	One aspect instance for each unique object bound to this at matched join points. Implicit condition: && this (myObject)
pertarget(pointcut-expression)	One aspect instance for each unique object bound to target at matched join points. Implicit condition: && target (myTargetObject)
percflow(pointcut-expression)	One aspect instance for each control flow begun at a matched join point. Implicit condition: && cflow (pointcut expression)
percflowbelow(pointcut-expression)	One aspect instance for each ...