我如何获取某个类的所有可用注释的列表

Question

Is there a way I can show user a list of all available annotations related to some class , for example all annotations available with in hibernate , or under javax.persistence.

Like , to be more specific, When i write @ in Eclipse and hit CtlSpace. I get this list http://screencast.com/t/tLAVFdi46OiB

I want to show this whole list somewhere in my application's Interface.

there must be some where this list is coming from , From where i can fetch this list .

Any idea

thanks

Answer 1

All annotations implement the Annotation interface. Therefore, you can try something like this to find all annotations in the org.hibernate package (see Reflections javadocs ):

Reflections reflections = new Reflections("org.hibernate");
Set<Class<? extends Annotation>> annotations  = reflections.getSubTypesOf(Annotation.class);

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You'll need the Reflections library, which relies on Guava and Javassist . If you're using IntelliJ and gradle (which I suggest) you can include this in your gradle file:

compile 'org.reflections:reflections-maven:0.9.9-RC2'
compile 'com.google.guava:guava:18.0'
compile 'javassist:javassist:3.12.1.GA'