Can't say I completely understand the object graph you're trying to
create, sounds essentially like ServiceConsumers can depend on other
ServiceConsumers.
I personally prefer using constructor injection, and putting @Inject
on a method like getDependencies() seems weird to me, especially since
it's part of the interface. It's not always possible to use
constructor injection if another framework is creating your objects,
but for your example I'll assume it is possible.
If you use constructor injection and inject
CustomerAccountsServiceConsumer, and CustomerAccountsServiceConsumer
into CustomerServiceConsumer then you can implement the
getDependencies() yourself:
class CustomerServiceConsumer extends ServiceConsumer {
CustomerAccountsServiceConsumer accountConsumer;
CustomerCreditCardsServiceConsumer creditCardConsumer;
@Inject
CustomerServiceConsumer(CustomerAccountsServiceConsumer
accountConsumer, CustomerCreditCardsServiceConsumer
creditCardConsumer) {
this.accountConsumer = accountConsumer;
this.creditCardConsumer = creditCardConsumer;
}
@Override
public List<ServiceConsumer> getDependencies() {
return Arrays.asList(new ServiceConsumer[] { accountConsumer,
creditCardConsumer } );
}
Using default bindings, when you ask Guice to create an instance of
CustomerServiceConsumer, it will first create a new
CustomerAccountsServiceConsumer and then a new
CustomerCreditCardsServiceConsumer and pass those instances into the
constructor of CustomerServiceConsumer.
-Scott
On Dec 19, 4:18 am, Aladdin <[email protected]> wrote:
> Hi , I'm new to the concept of IoC so I hope my question is not funny
> and I would appreciated that when people answer me provide full code.
> Now I have an Abstract class called ServiceConsumer. Assuming I have
> the following
> Say this is the ServiceConsumer class
> public abstract class ServiceConsumer {
> public abstract List<ServiceConsumer> getDependencies();
> public abstract Object consum();
>
> }
>
> And those are the concrete versions :
>
> 1-CustomerServiceConsumer
> 2-CustomerAccountsServiceConsumer
> 3-CustomerCreditCardsServiceConsumer
>
> Some how I want inject CustomerAccountsServiceConsumer &
> CustomerCreditCardsServiceConsumer into getDependencies() in
> CustomerServiceConsumer
>
> Can this be done ?
>
> * I also want to note that I'm using GIN , not Guice but I think they
> have the same concept .
>
> Thanks in advance
>
> Aladdin
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