获取切入点内带注释的参数

发布于 2024-11-18 23:06:53 字数 840 浏览 2 评论 0原文

我有两个注释 @LookAtThisMethod 和 @LookAtThisParameter，如果我在带有 @LookAtThisMethod 的方法周围有一个切入点，我如何提取所述参数用@LookAtThisParameter注释的方法？

例如：

@Aspect
public class LookAdvisor {

    @Pointcut("@annotation(lookAtThisMethod)")
    public void lookAtThisMethodPointcut(LookAtThisMethod lookAtThisMethod){}

    @Around("lookAtThisMethodPointcut(lookAtThisMethod)")
    public void lookAtThisMethod(ProceedingJoinPoint joinPoint, LookAtThisMethod lookAtThisMethod) throws Throwable {
        for(Object argument : joinPoint.getArgs()) {
            //I can get the parameter values here
        }

        //I can get the method signature with:
        joinPoint.getSignature.toString();


        //How do I get which parameters  are annotated with @LookAtThisParameter?
    }

}

原文

I have two annotation @LookAtThisMethod and @LookAtThisParameter, if I have a pointcut around the methods with @LookAtThisMethod how could I extract the parameters of said method which are annotated with @LookAtThisParameter?

For example:

@Aspect
public class LookAdvisor {

    @Pointcut("@annotation(lookAtThisMethod)")
    public void lookAtThisMethodPointcut(LookAtThisMethod lookAtThisMethod){}

    @Around("lookAtThisMethodPointcut(lookAtThisMethod)")
    public void lookAtThisMethod(ProceedingJoinPoint joinPoint, LookAtThisMethod lookAtThisMethod) throws Throwable {
        for(Object argument : joinPoint.getArgs()) {
            //I can get the parameter values here
        }

        //I can get the method signature with:
        joinPoint.getSignature.toString();


        //How do I get which parameters  are annotated with @LookAtThisParameter?
    }

}

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朮生 2024-11-25 23:06:53

我围绕这个其他答案对不同但类似的问题。

MethodSignature signature = (MethodSignature) joinPoint.getSignature();
String methodName = signature.getMethod().getName();
Class<?>[] parameterTypes = signature.getMethod().getParameterTypes();
Annotation[][] annotations = joinPoint.getTarget().getClass().getMethod(methodName,parameterTypes).getParameterAnnotations();

我必须遍历目标类的原因是因为被注释的类是接口的实现，因此 signature.getMethod().getParameterAnnotations() 返回 null。

I modeled my solution around this other answer to a different but similar question.

MethodSignature signature = (MethodSignature) joinPoint.getSignature();
String methodName = signature.getMethod().getName();
Class<?>[] parameterTypes = signature.getMethod().getParameterTypes();
Annotation[][] annotations = joinPoint.getTarget().getClass().getMethod(methodName,parameterTypes).getParameterAnnotations();

The reason that I had to go through the target class was because the class that was annotated was an implementation of an interface and thusly signature.getMethod().getParameterAnnotations() returned null.

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ペ泪落弦音 2024-11-25 23:06:53

final String methodName = joinPoint.getSignature().getName();
    final MethodSignature methodSignature = (MethodSignature) joinPoint
            .getSignature();
    Method method = methodSignature.getMethod();
    GuiAudit annotation = null;
    if (method.getDeclaringClass().isInterface()) {
        method = joinPoint.getTarget().getClass()
                .getDeclaredMethod(methodName, method.getParameterTypes());
        annotation = method.getAnnotation(GuiAudit.class);
    }

此代码涵盖了方法属于接口的情况

final String methodName = joinPoint.getSignature().getName();
    final MethodSignature methodSignature = (MethodSignature) joinPoint
            .getSignature();
    Method method = methodSignature.getMethod();
    GuiAudit annotation = null;
    if (method.getDeclaringClass().isInterface()) {
        method = joinPoint.getTarget().getClass()
                .getDeclaredMethod(methodName, method.getParameterTypes());
        annotation = method.getAnnotation(GuiAudit.class);
    }

This code covers the case where the Method belongs to the interface

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