I think Guice uses the second approach - this is the only reason
because the code is currently working.
thank you!!!
best,
s.
2008/9/3 Dhanji R. Prasanna <[EMAIL PROTECTED]>:
> Doesn't work for me:
> public class InitParamImplTest {
> private static final String SOMETHING = "something";
> @Retention(RetentionPolicy.RUNTIME)
> public static @interface MyParam {
> String value();
> }
> public class MyParamImpl extends InitParamImpl implements MyParam {
> public MyParamImpl(String value) {
> super(value, MyParam.class);
> }
> }
> @MyParam(SOMETHING)
> public int x;
> @Test
> public final void annotationEquals() throws Exception {
> final MyParam annotation1 = InitParamImplTest.class
> .getField("x")
> .getAnnotation(MyParam.class);
> final MyParam annotation2 = new MyParamImpl(SOMETHING);
> assert annotation2.equals(annotation1) : "equal annotations are not
> equal";
> }
> }
> It fails the assertion. Note that if you change the expression around:
> assert annotation1.equals(annotation2) : "equal annotations are not
> equal";
>
> It will work because you are no longer using InitParamImpl's equals()
> method, rather the JVM annotation impl's. Perhaps this is where you are
> being thrown off?
> Dhanji.
> On Wed, Sep 3, 2008 at 4:53 AM, Simone Tripodi <[EMAIL PROTECTED]>
> wrote:
>>
>> Hi Dhanji,
>> I need a suggestion - I implemented an annotation impl
>> (http://code.google.com/p/injectlet/source/browse/#svn/trunk) where
>> the method equals uses the obj.getClass() and it's currently working.
>> Is there a reason why it works - maybe because it's a special case -
>> or do we must blame ourselves?
>> Thanks in advance!
>> Best regards,
>> Simone
>>
>> 2008/9/2 Simone Tripodi <[EMAIL PROTECTED]>:
>> > Hi Dhanji
>> > of course you're right, I didn't test the code since I "developed" it
>> > directly in my mail client ;)
>> > Best,
>> > Simone
>> >
>> > 2008/9/2 Dhanji R. Prasanna <[EMAIL PROTECTED]>:
>> >>
>> >> note that this impl of equals will always return false because of
>> >> obj.getClass().
>> >>
>> >> Dhanji.
>> >>
>> >> On 9/1/08, Simone Tripodi <[EMAIL PROTECTED]> wrote:
>> >>>
>> >>> Hi Elek,
>> >>> as Robbie suggested you - and reading oldest posts here in the group
>> >>> you can understand that Robbie always knows the best solution - if you
>> >>> choice the second way (and you still need help) I've prepared for you
>> >>> the implementation you need:
>> >>>
>> >>>
>> >>> public class PersistenceContextImpl implements PersistenceContext {
>> >>>
>> >>> private String unitName;
>> >>>
>> >>> public PersistenceContextImpl(String unitName) {
>> >>> this.unitName = unitName;
>> >>> }
>> >>>
>> >>> public Class<? extends Annotation> annotationType() {
>> >>> return PersistenceContext.class;
>> >>> }
>> >>>
>> >>> @Override
>> >>> public boolean equals(Object obj) {
>> >>> if (this == obj) {
>> >>> return true;
>> >>> }
>> >>>
>> >>> if ((obj == null) || (obj.getClass() !=
>> >>> PersistenceContext.class)) {
>> >>> return false;
>> >>> }
>> >>>
>> >>> PersistenceContext other = (PersistenceContext) obj;
>> >>> return unitName.equals(other.unitName());
>> >>> }
>> >>>
>> >>> @Override
>> >>> public int hashCode() {
>> >>> return (127 * "unitName".hashCode() ^ unitName.hashCode());
>> >>> }
>> >>>
>> >>> public String unitName() {
>> >>> return unitName;
>> >>> }
>> >>>
>> >>> }
>> >>>
>> >>>
>> >>> Now you're able to bind EntityManager in this way:
>> >>>
>> >>> binder.bind(EntityManager.class).annotatedWith(new
>> >>> PersistenceContextImpl("Test1PU")).toProvider(new
>> >>> EntityManagerProvider(directory1));
>> >>>
>> >>> binder.bind(EntityManager.class).annotatedWith(new
>> >>> PersistenceContextImpl("Test2PU")).toProvider(new
>> >>> EntityManagerProvider(directory2));
>> >>>
>> >>> I hope this helps!
>> >>> Best regards,
>> >>> Simone
>> >>>
>> >>> 2008/8/31 Robbie Vanbrabant <[EMAIL PROTECTED]>:
>> >>>> The easy answer: consider using Warp Persist
>> >>>> (http://www.wideplay.com) for
>> >>>> guicy persistence. Although support for multiple persistence units is
>> >>>> not
>> >>>> implemented in 1.0, we have have experimental support for it in the
>> >>>> trunk.
>> >>>> If you depend on that functionality let me know and we will help you
>> >>>> get
>> >>>> started.
>> >>>>
>> >>>> The other answer would be yes, you can do that. Have a look at how
>> >>>> Guice
>> >>>> implements Names.named(...). You basically have to bind to annotation
>> >>>> instances instead of types, and you do that by subclassing the
>> >>>> annotation
>> >>>> and binding to an instance of that subclass.
>> >>>>
>> >>>> Hope this helps,
>> >>>> Robbie
>> >>>>
>> >>>> On Sun, Aug 31, 2008 at 6:59 PM, elek <[EMAIL PROTECTED]> wrote:
>> >>>>>
>> >>>>> Hi,
>> >>>>>
>> >>>>> Is there any way to inject dynamic values to a class according to
>> >>>>> the
>> >>>>> annotation parameters with Guice?
>> >>>>> Eg.: I have the following fields in a class:
>> >>>>>
>> >>>>> @PersistenceContext(unitName="Test1PU")
>> >>>>> EntityManager em1;
>> >>>>>
>> >>>>> @PersistenceContext(unitName="Test2PU")
>> >>>>> EntityManager em2;
>> >>>>>
>> >>>>> An I would like to inject different EntityManager instances.
>> >>>>> Unfortunately I can't access the annotation or the original Field
>> >>>>> over
>> >>>>> the the Provider interface:
>> >>>>>
>> >>>>>
>> >>>>>
>> >>>>> binder.bind(EntityManager.class).annotatedWith(PersistenceContext.class).toProvider(new
>> >>>>> EntityManagerProvider(directory, ???unitName value???));
>> >>>>>
>> >>>>> Is there any solution for it?
>> >>>>>
>> >>>>> Thanks:
>> >>>>> m.
>> >>>>>
>> >>>>
>> >>>>
>> >>>> >
>> >>>>
>> >>>
>> >>>
>> >>>
>> >>> --
>> >>> My LinkedIn profile: http://www.linkedin.com/in/simonetripodi
>> >>> My GoogleCode profile: http://code.google.com/u/simone.tripodi/
>> >>> My Sourceforge: https://sourceforge.net/users/stripodi
>> >>> My Picasa: http://picasaweb.google.com/simone.tripodi/
>> >>> My Tube: http://www.youtube.com/user/stripodi
>> >>> My Del.icio.us: http://del.icio.us/simone.tripodi
>> >>>
>> >>> >
>> >>>
>> >>
>> >> >>
>> >>
>> >
>> >
>> >
>> > --
>> > My LinkedIn profile: http://www.linkedin.com/in/simonetripodi
>> > My GoogleCode profile: http://code.google.com/u/simone.tripodi/
>> > My Sourceforge: https://sourceforge.net/users/stripodi
>> > My Picasa: http://picasaweb.google.com/simone.tripodi/
>> > My Tube: http://www.youtube.com/user/stripodi
>> > My Del.icio.us: http://del.icio.us/simone.tripodi
>> >
>>
>>
>>
>> --
>> My LinkedIn profile: http://www.linkedin.com/in/simonetripodi
>> My GoogleCode profile: http://code.google.com/u/simone.tripodi/
>> My Sourceforge: https://sourceforge.net/users/stripodi
>> My Picasa: http://picasaweb.google.com/simone.tripodi/
>> My Tube: http://www.youtube.com/user/stripodi
>> My Del.icio.us: http://del.icio.us/simone.tripodi
>>
>>
>
>
> >
>
--
My LinkedIn profile: http://www.linkedin.com/in/simonetripodi
My GoogleCode profile: http://code.google.com/u/simone.tripodi/
My Sourceforge: https://sourceforge.net/users/stripodi
My Picasa: http://picasaweb.google.com/simone.tripodi/
My Tube: http://www.youtube.com/user/stripodi
My Del.icio.us: http://del.icio.us/simone.tripodi
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