I don't know about this. It would work (and break existing code, unless you
use something other than value for the annotation). I don't know if I would
want to have to create a new class for each role in my project. Yes, it
would be a small price to pay, but it just feels wrong.
On Thu, Dec 4, 2008 at 10:33 PM, Bruno Borges <[EMAIL PROTECTED]>wrote:
> I've found a way to implement a type-safe check for this. Here it goes:
>
> import java.lang.annotation.Documented;
> import java.lang.annotation.ElementType;
> import java.lang.annotation.Inherited;
> import java.lang.annotation.Retention;
> import java.lang.annotation.RetentionPolicy;
> import java.lang.annotation.Target;
>
> @AuthorizeInstantiation(value = { User.class, Admin.class })
> public class EnumAnnotation {
>
> }
>
> @Retention(RetentionPolicy.RUNTIME)
> @Target( { ElementType.PACKAGE, ElementType.TYPE })
> @Documented
> @Inherited
> @interface AuthorizeInstantiation {
>
> Class<? extends Role>[] value() default {};
>
> }
>
> class Role {
> }
>
> class User extends Role {
> }
>
> class Admin extends Role {
> }
>
> So, the only thing that must change is the annotation
> @AuthorizeInstantiation, to accept classes that extends roles.
>
> Thoughts anyone?
>
> cheers,
> Bruno
>
>
>
> Bruno Borges wrote:
>
>> You simply can't do that because the nature of Annotations.
>>
>> Even if AuthorizeInstantiation's values were of type Object[] you wouldn't
>> be able to do that with Enums.
>>
>> You will have to use Strings.
>>
>> Although there's some hack you can make using Java 6 to accomplish what
>> you want. If you are interested, take a look at this link:
>>
>> http://www.iam.unibe.ch/~akuhn/blog/2008/roman-numerals-in-your-java/<http://www.iam.unibe.ch/%7Eakuhn/blog/2008/roman-numerals-in-your-java/>
>>
>> Good luck!!
>>
>> Cheers,
>> Bruno
>>
>> miro wrote:
>>
>>> I am using this @AuthorizeInstantiation (wicket authetication
>>> annotation)
>>> in my pages , the code for this annotation
>>>
>>> @Retention(RetentionPolicy.RUNTIME)
>>> @Target( { ElementType.PACKAGE, ElementType.TYPE })
>>> @Documented
>>> @Inherited
>>> public @interface AuthorizeInstantiation {
>>>
>>> /**
>>> * Gets the roles that are allowed to take the action.
>>> * * @return the roles that are allowed. Returns a zero length
>>> array by
>>> default
>>> */
>>> String[] value() default {};
>>> }
>>>
>>>
>>> I created my enum with representing authorities
>>>
>>> public enum Authorities {
>>> LIASION_OFFICER,
>>> GRANTS_OFFICER,
>>> PROGRAM_ANALYST,
>>> ADMIN;
>>>
>>> }
>>>
>>> I am trying to use AuthorizeInstantiation in my page here an example
>>> @AuthorizeInstantiation(value={Authorities.LIASION_OFFICER.name()})
>>> public class HomePage extends BasePage {
>>>
>>>
>>> this line does not compile, I get the error
>>> The value of annotation attribute AuthorizeInstantiation .value must be a
>>> constant expression .please help me resolve this .
>>>
>>>
>>
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