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import java.lang.reflect.*;
import java.lang.annotation.*;
interface I {}
class D implements I {}
aspect Introduction {
// ITD onto interface
public String I.helloWorld( @SomeAnnotation("xyz") String who) {
return "Hello " + who;
}
}
public class Four {
public static void main(String[] argv) throws Exception {
Class<D> clazz = D.class;
Method m = clazz.getMethod("helloWorld", String.class);
Annotation[] ann = m.getAnnotations();
for (int i = 0; i < m.getParameterAnnotations().length; i++) {
int count = m.getParameterAnnotations()[i].length;
System.out.println("Class D parameter " + i + " has " + count + " parameter annotations");
}
Class<I> clazzI = I.class;
m = clazzI.getMethod("helloWorld", String.class);
ann = m.getAnnotations();
for (int i = 0; i < m.getParameterAnnotations().length; i++) {
int count = m.getParameterAnnotations()[i].length;
System.out.println("Interface I parameter " + i + " has " + count + " parameter annotations");
}
}
}
@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.PARAMETER)
@interface SomeAnnotation {
String value() default "";
}
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