private Advice asAdvice(Method method) {
if (method.getAnnotations().length == 0) return null;
Before beforeAnn = method.getAnnotation(Before.class);
if (beforeAnn != null) return new AdviceImpl(method,beforeAnn.value(),AdviceKind.BEFORE);
After afterAnn = method.getAnnotation(After.class);
if (afterAnn != null) return new AdviceImpl(method,afterAnn.value(),AdviceKind.AFTER);
AfterReturning afterReturningAnn = method.getAnnotation(AfterReturning.class);
if (afterReturningAnn != null) {
String pcExpr = afterReturningAnn.pointcut();
if (pcExpr.equals("")) pcExpr = afterReturningAnn.value();
return new AdviceImpl(method,pcExpr,AdviceKind.AFTER_RETURNING,afterReturningAnn.returning());