Problem with injection

[thierry.rietsch]

Hi all

I have a problem with injection.

I have an interface called SearchCriteria and three classes (Entities) which implement this interface. Additional I have an EJB which saves the entities in the database. The search criteria gets injected into the bean from the facelet. Therefor I have three facelets which cover the fields of the entities. All this facelets call the EJB.save() methods and pass the search criteria object.

Now I figured out, that I need to annotate the entity (@Name("..")) the same as the field name in the EJB is named (else other facelets and beans don't work. Is this correct?). This leads me into a problem as I have three different annotations for the names of the entities but one field name in the EJB which saves the entitites. How can I solve this?

-> In the EJB save method, I compare an enum value to figure out what kind of object it is. Then I cast it to the right class and persist it then with the entity manager. I know that using a command pattern would be the better way (figured it out just a few minutes before), but this wouldn't change my problem.

Thanks for your help and your answers,

Thierry

[gavin.king]

Are you asking how to combine polymorphism with injection via @In? Or something else?

[thierry.rietsch]

Hi

Sorry for the confusing question.

My questsions are:
- Is this correct, that the field annotated with @In needs to have the same name as the entity is annoted with @Name?
- And yes how is polymorphism done over @In

Sorry again and thanks for your answer!

Thierry

[gavin.king]

@In can inject any context variable.

You can bind any object to any context variable using @Out or Context.set().

So no, the three components do not have to have the same name.

[gavin.king]

Or you can turn the implementation inside out and use a @Factory method, which decides what object to return.