This is similar to a question from earlier this week...
Guice will help you remove invocations of "new" on service objects.
It won't be a replacement for your domain-level factory objects i.e.,
objects that do more work on an object than simply instantiate it.
Such a factory might look like:
class YourFactory {
private final Provider<Foo> fooProvider;
@Inject YourFactory(Provider<Foo> fooProvider) {
...
}
Foo createFoo(ArgType1 arg1, ArgType2 arg2, ...) {
Foo foo = fooProvider.get();
... manipulate foo, probably using the args given above
}
}
Note that AssistedInject can remove the boilerplate if all the factory is
doing is to use the argument it gets as constructor arguments to the thing
it is creating. But it sounds like your requirements are more in-depth in
that the Factory seems to be doing more work than simply instantiating an
object.
Fred
On Mon, Apr 11, 2011 at 10:45 AM, dhoffer <[email protected]> wrote:
> I'm taking a look at Guice to see how it would work for us, currently
> we code the IoC manually (giant main that wires everything up) and use
> factories to create dynamic objects so all methods are mock testable,
> i.e. no 'new' in the code (just in the main and factories).
>
> I get how Guice solves the IoC part with @Inject & modules, however
> how does it help with the factories that generate dynamic objects?
> I.e. a method that calculates values, creates an object with those
> values, and does some work on and/or returns the object. How does
> Guice stop us from needing to write the class factory that generates
> the object? It looks like I could inject a typed Provider but that
> doesn't let me create the object with the values just created
> dynamically. (Also it would tie my code to the Guice APIs.)
>
> So it seems Guice solves the static part of the app but not the
> dynamic part or am I missing something?
>
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