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import java.lang.annotation.*;
import java.lang.reflect.*;
@Retention(RetentionPolicy.RUNTIME)
@interface Annot1 {}
@Retention(RetentionPolicy.RUNTIME)
@interface Annot2 {}
@Retention(RetentionPolicy.RUNTIME)
@interface Annot3 {}
class Target {
public static void main(String[] argv) throws Exception {
System.out.println("Field one");
printAnnotations(A.class.getDeclaredField("one"));
printAnnotations(B.class.getDeclaredField("one"));
System.out.println("Field two");
printAnnotations(A.class.getDeclaredField("two"));
printAnnotations(B.class.getDeclaredField("two"));
System.out.println("Field three");
printAnnotations(A.class.getDeclaredField("two"));
printAnnotations(B.class.getDeclaredField("two"));
}
public static void printAnnotations(Field field) {
Annotation[] annos = field.getAnnotations();
if (annos==null || annos.length==0) {
System.out.println("no annotations");
} else {
for (Annotation anno: annos) {
System.out.print(anno+" ");
}
System.out.println();
}
}
}
class A {
public int one;
public String two;
public float three;
}
class B {
public int one;
public String two;
public float three;
}
aspect DeclareAnnot {
declare @field: (int A.one) || (int B.one): @Annot1;
declare @field: (String two) && !(* B.*): @Annot2;
declare @field: !(* one) && !(* two): @Annot3;
}
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