// 아래와 같은 어노테이션이 있을 때!
@Target(ElementType.PARAMETER)
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface LoginUser {
	boolean required() default true;
	SomeValue [] someValues() default {};
}
 
// 아래와 같이 클래스로 구현한 뒤에 해당 클래스의 인스턴스를 생성하면 된다.
public static class FakeLoginUser implements LoginUser {
 
	private boolean requiredValue = true;
 
	private SomeValue[] someValueValue = {};
 
	public FakeLoginUser(boolean requiredValue, SomeValue[] someValueValue) {
		this.requiredValue = requiredValue;
		this.someValueValue = someValueValue;
	}
 
	@Override
	public Class<? extends Annotation> annotationType() {
		return LoginUser.class;
	}
 
	@Override
	public boolean required() {
		return requiredValue;
	}
 
	@Override
	public SomeValue[] someValue() {
		return someValueValue;
	}
}

private MyAnn requiredTrueMyAnn;
private MyAnn requiredFalseMyAnn;
 
public void myAnnSupports(@MyAnn Object requiredTrueObject, @MyAnn(required = false) Object requiredFalseObject) throws SecurityException, NoSuchMethodException {
 
    Annotation[][] parameterAnnotations = this.getClass()
            .getMethod("myAnnSupports", Object.class, Object.class).getParameterAnnotations();
 
    requiredTrueMyAnn= parameterAnnotations[0][0]; // requiredTrueMyAnn.required() == true
    requiredFalseMyAnn= parameterAnnotations[1][0]; // requiredFalseMyAnn.required() == false
}