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.
>>
>
>
> >
>
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