来自上一个问题(AspectJ - Presence of annotation in join point expression not recognized),
我的目标: 在一个方面,我希望能够从匹配的函数中提取/检索所有带注释的参数,无论有多少。 (然后应用一些处理,但这不是这个问题的范围)
所以目前,这就是我所做的(不工作):
@Before("execution (* org.xx.xx.xx..*.*(@org.xx.xx.xx.xx.xx.Standardized (*),..))")
public void standardize(JoinPoint jp) throws Throwable {
Object[] myArgs = jp.getArgs();
getLogger().info("Here: arg length=" + myArgs.length);
// Roll on join point arguments
for (Object myParam : myArgs) {
getLogger().info(
"In argument with " + myParam.getClass().getAnnotations().length
+ " declaread annotations");
getLogger().info("Class name is " + myParam.getClass().getName());
// Get only the one matching the expected @Standardized annotation
if (myParam.getClass().getAnnotation(Standardized.class) != null) {
getLogger().info("Found parameter annotated with @Standardized");
standardizeData(myParam.getClass().getAnnotation(Standardized.class), myParam);
}
}
}
这是与建议匹配的代码:
public boolean insertLog(@Standardized(type = StandardizedData.CLIPON) CliponStat theStat) {
// ...
}
junit测试产生的痕迹:
INFO: ICI: arg lenght=1
INFO: In argument with 0 declaread annotations
看起来它没有检测到注释
所以我的问题是:如何检测具有特定注释的参数?
有人知道怎么做吗?
提前感谢您的帮助。
问候。
编辑:我找到了这个帖子Pointcut matching methods with annotated parameters,讨论了同样的事情,并应用了给定的解决方案,但它没有工作..
答案 0 :(得分:10)
我希望我理解你。
myParam.getClass().getAnnotations()
为您提供课程注释。类似的东西:
@Standardized(type = StandardizedData.CLIPON)
public class Main{...}
也许这个切入点/建议可以帮助你:
@Before("execution (* org.xx.xx.xx..*.*(@org.xx.xx.xx.xx.xx.Standardized (*),..))")
public void standardize(JoinPoint jp) throws Throwable {
Object[] args = jp.getArgs();
MethodSignature ms = (MethodSignature) jp.getSignature();
Method m = ms.getMethod();
Annotation[][] parameterAnnotations = m.getParameterAnnotations();
for (int i = 0; i < parameterAnnotations.length; i++) {
Annotation[] annotations = parameterAnnotations[i];
System.out.println("I am checking parameter: " + args[i]);
for (Annotation annotation : annotations) {
System.out.println(annotation);
if (annotation.annotationType() == Standardized.class) {
System.out.println("we have a Standardized Parameter with type = "
+ ((Standardized) annotation).type());
}
}
}
}
这给了我以下输出:
I am checking parameter: main.CliponStat@331f2ee1
@annotation.Standardized(type=CLIPON)
we have a Standardized Parameter with type = CLIPON