Comments on: Creating Custom Annotations and Using Them

By: pk

pk — Mon, 21 Dec 2009 18:47:55 +0000

My question is here we are using a demo class that uses the parser. But say I want to make the code for JDBC connection to be generated using annotations. Is that possible using annotations. How to do that?

By: DHorst

DHorst — Fri, 09 Oct 2009 06:50:00 +0000

Thank you for your great work. Now it is clear for me! :-)

By: Isa Goksu

Isa Goksu — Thu, 08 Oct 2009 18:55:31 +0000

@פורומים, @DHorst I’ve added a very simple working example to the post. Hope it clarifies a bit!

By: פורומים

פורומים — Thu, 08 Oct 2009 11:46:11 +0000

Please answer @DHorst, thanks!

By: DHorst

DHorst — Thu, 08 Oct 2009 11:06:50 +0000

How can i call my instance method, using >>method.invoke(null);<< does not work?

By: DHorst

DHorst — Thu, 08 Oct 2009 08:16:23 +0000

Thanks for your fast answer. :-) The class where i use the @Copyright Annotation have to look like this?

public class MyTest {

@Copyright public String info() { // do something return "AWESOME"; } }

By: Isa Goksu

Isa Goksu — Thu, 08 Oct 2009 08:09:33 +0000

@DHorst, yeah you can do. I invoked method since @Test annotation works like that. If you want reading an attribute value and then executing different things depending on the value, all you need to do is placing conditional logic there. here is an example:

// this is how you access to the attributes
Test test = method.getAnnotation(Test.class);
// we use Class type here because our attribute type
// is class. If it would be string, you'd use string
String info = test.info();

if ("AWESOME".equals(info)) {
  System.out.println("info is given as 'AWESOME'");
}

Hope it gives the idea. Ideally you would delegate this logic to some other class :)

By: DHorst

DHorst — Thu, 08 Oct 2009 07:29:37 +0000

I have a question for understanding, is it possible to implement own code for the Test-Interface or can i only call methods? For example, i want to execute a snippet whenever the parser reaches an annotation. Where do i implement this for the Test-Interface?

Do you have an example Parser for your first snippet >>String info() default "";<< ?

thx!