AspectJ 匹配返回类型作为与泛型的接口(interface)

Question

我正在尝试创建一个 AspectJ Aspect 来拦截具有通用接口(interface)的返回方法。

这是我的 AspectJ

@AspectJ
public class MyAspect {

    @AfterReturning("execution(java.util.Collection+<mypackage.MyAbstractEntity+> mypackage.mvc.controllers..*.*(..))", returning = "list")
    public doStuff(JoinPoint j, Collection<MyAbstractEntity> list) {
    }
}

这是我要编入的类(class):

package mypackage.mvc.controller;

public class MyController {
    // MyEntity extends MyAbstractEntity
    public List<MyEntity> findAll() {
    }
}

我究竟做错了什么？

Answer 1

解决了!

将“加号”放在泛型定义之后(“加号”表示“扩展它的类”):

java.util.Collection<mypackage.MyAbstractEntity+>+

并将“列表”收缩为“？扩展”:

public doStuff(JoinPoint j, Collection<? extends MyAbstractEntity> list) {

代码将如下所示:

@AspectJ
public class MyAspect {

    @AfterReturning("execution(java.util.Collection<mypackage.MyAbstractEntity+>+ mypackage.mvc.controllers..*.*(..))", returning = "list")
    public doStuff(JoinPoint j, Collection<MyAbstractEntity> list) {
    }
}