org.springframework.aop.aspectj.autoproxy
Class AspectJPrecedenceComparator

java.lang.Object
  org.springframework.aop.aspectj.autoproxy.AspectJPrecedenceComparator

All Implemented Interfaces:

Comparator

 class AspectJPrecedenceComparator
extends Object
implements Comparator

Orders AspectJ advice/advisors by precedence (not invocation order).

Given two pieces of advice, a and b:

• if a and b are defined in different aspects, then the advice in the aspect with the lowest order value has the highest precedence
• if a and b are defined in the same aspect, then if one of a or b is a form of after advice, then the advice declared last in the aspect has the highest precedence. If neither a nor b is a form of after advice, then the advice declared first in the aspect has the highest precedence.

Important: Note that unlike a normal comparator a return of 0 means we don't care about the ordering, not that the two elements must be sorted identically. Used with AspectJ PartialOrder class.

Since:

2.0

Author:

Adrian Colyer, Juergen Hoeller

Constructor Summary

AspectJPrecedenceComparator()
Create a default AspectJPrecedenceComparator.

AspectJPrecedenceComparator(Comparator advisorComparator)
Create a AspectJPrecedenceComparator, using the given Comparator for comparing Advisor instances.

Method Summary

int	compare(Object o1, Object o2)

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Comparator

equals

Constructor Detail

AspectJPrecedenceComparator

public AspectJPrecedenceComparator()

Create a default AspectJPrecedenceComparator.

AspectJPrecedenceComparator

public AspectJPrecedenceComparator(Comparator advisorComparator)

Create a AspectJPrecedenceComparator, using the given Comparator for comparing Advisor instances.

Parameters:

advisorComparator - the Comparator to use for Advisors

Method Detail

compare

public int compare(Object o1,
                   Object o2)

Specified by:

compare in interface Comparator