Micronaut/Introspection API to search for all interfaces that has a certain annotation.

[subash89]

This is not a bean/object but an interface only(a type), annotated with, say DAO.class. I could achieve this in java reflection as follows. Is there a way I can achieve same using introspection/reflection free manner so that I will not have to use reflection.

 Reflections reflections = new Reflections("com.abc");
        Set<Class<?>> annotated =
                reflections.getTypesAnnotatedWith(DAO.class);

[yawkat]

you could try the scan methods on Environment.

[subash89]

@yawkat Thanks for the suggestion.

I tried ctx.getEnvironment().scan(DAO.class,"com.abc") nothing comes up. Idea is to find 'MyBatisTableOne'

@Qualifier
@Retention(RUNTIME)
@Introspected
public @interface DAO {

    String type();

    String datasource();
}

And this is the class/interface I want to find.

@DAO(type = "mybatis", datasource = "db1")
@Introspected
public interface MyBatisTableOne{

    @Select("SELECT customer_name FROM TEST_SERVICES WHERE customer_id = #{customer_id}")
    String getOrganizationId(String customer_id);

}

[graemerocher]

introspections are generally for JavaBeans/records to be able read/write properties.

You can remove @Introspected and call ctx.getBeanDefinitions(Qualifiers.byStereotype(DAO.class)) to find these as beans.

[graemerocher]

most likely because you have an interface which requires an implementation. You could annotate DAO with @Introduction although it is a bit weird

[subash89]

@graemerocher Thanks for the clue. I tried it and it gives me the list of classes now. But the problem is it gives me for example the wrapper class micronaut creates. "class com.abc.MyBatisTableOne$Intercepted". Not the real interface itself. I could not find a way to extract the underneath interface.

[subash89]

I can do a trick like, trip out the $Intercepted and get the full qualified name and do a Class.forName() to load it. And that gives me the interface obviously. But that again involves reflection. Any better way ?

[graemerocher]

you can use getClass().getInterfaces()