On 9 Jan 2013, at 09:20, Michael wrote:
> Hi All,
>
> I created an annotation named "Validate"
>
> @Retention(RetentionPolicy.RUNTIME)
> @Target(ElementType.METHOD)
> public @interface Validate {
> Class<? extends MethodInterceptor>[] value();
> }
>
> And defined it before a method
> @Validate({OneInterceptor.class, TwoInterceptor.class})
> public void doPost(HttpServletRequest req, HttpServletResponse resp) {
> //do something
> }
>
> OneInterceptor implements MethodInterceptor {.....} TwoInterceptor
> implements MethodInterceptor{....}
>
> So I want to know is there a possible to bind interceptors within a Module
> like this ? Many thanks!
One option would be to have a ValidateMethodInterceptor implementation bound in
your module that gets the Validate annotation from the reflected method, ie.
methodInvocation.getMethod().getAnnotation(Validate.class) - and then delegates
to the listed method interceptors. If you want the delegated method
interceptors injected (as opposed to clazz.newInstance) then you'll need to add
a @Inject'd field/setter to ValidateMethodInterceptor for the injector and
arrange for the ValidateMethodInterceptor instance to be injected with
binder.requestInjection(...) - then you can call injector.getInstance(clazz)
for each interceptor at delegation time.
--
Cheers, Stuart
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