Can I obtain the return type or field type in JavaAccess?

[heyuxiang1996]

I am making a rule to check if the application calls Google HideApi, This seems to require obtaining more detailed information from JavaAccess Can I obtain the return type or field type in JavaAccess? Examples similar to the following:

public class Temp {
    public void aMethod() {
        String s = TripartiteLibrary.a();
        int b = TripartiteLibrary.b;
    }

    @Test
    public void test() {
        JavaMethod javaMethod = new ClassFileImporter().importClass(Temp.class).getMethod("aMethod");
        javaMethod.getAccessesFromSelf().stream().forEach(javaAccess -> {
            System.out.println(javaAccess.getDescription());
            // Can I obtain the return type or field type in JavaAccess?
        });
    }

}

[hankem]

The field or method are the target of the corresponding JavaAccess. You need to look at specific subclasses of this generic class in order to make full sense it:

JavaAccess<TARGET>
├─ JavaFieldAccess extends JavaAccess<FieldAccessTarget>
└─ JavaCodeUnitAccess<T extends CodeUnitAccessTarget> extends JavaAccess<T>
   ├─ JavaCall<T extends CodeUnitCallTarget> extends JavaCodeUnitAccess<T>
   │  ├─ JavaMethodCall extends JavaCall<AccessTarget.MethodCallTarget>
   │  └─ JavaConstructorCall extends JavaCall<AccessTarget.ConstructorCallTarget>
   └─ JavaCodeUnitReference<T extends CodeUnitReferenceTarget> extends JavaCodeUnitAccess<T>
      ├─ JavaMethodReference extends JavaCodeUnitReference<MethodReferenceTarget>
      └─ JavaConstructorReference extends JavaCodeUnitReference<ConstructorReferenceTarget>

So if you're only interested in method return types or field types:

System.out.println(javaAccess.getDescription());
// Can I obtain the return type or field type in JavaAccess?
// => YES, we can!
if (javaAccess instanceof JavaMethodCall) {
    System.out.println("Method return type: " + ((JavaMethodCall) javaAccess).getTarget().getReturnType());
}
if (javaAccess instanceof JavaFieldAccess) {
    System.out.println("Field type: " + ((JavaFieldAccess) javaAccess).getTarget().getType());
}

[heyuxiang1996]

very detailed response I forgot about the inheritance relationship of JavaAccess， Thank you very much!!!