Hi Sam.
I wanted something along these lines:
1. When creating new resources, no URI is given. The resource is
populated, save() is invoked, and at that time a URI is set on the resource.
2. When loading existing resources, a URI is supplied are construction
time and is used to load the resource state.
Having worked further through this example I realized that
create(), load(), save() didn't really belong in the resource class. By
moving them into a separate factory class I avoided the need for
AssistedInject altogether. I guess the point is that as factories get
more sophisticated it makes sense to code them by hand.
Thanks,
Gili
On 20/06/2011 1:57 PM, Sam Berlin wrote:
What is it that you're trying to achieve here? Do you have a Factory
interface for creating Resource? Are you expecting the Factory method
to always supply a URI? Or sometimes not supply it? Or supply it but
let it be null?
sam
On Sun, Jun 19, 2011 at 10:58 PM, cowwoc <[email protected]
<mailto:[email protected]>> wrote:
Hi,
How can I mix optional parameters into a constructor with
AssistedInject? For example:
public class Resource
{
@Inject
public Resource(@Assisted URI uri, Helper helper)
{...}
public static interface Builder
{
/**
* Create a new resource (uri is null).
*/
Resource create();
/**
* Load an existing resource (uri is non-null).
*/
Resource load(URI uri);
}
}
I tried this:
public class Resource
{
@Inject
public Resource(UriHolder uri, Helper helper)
{...}
static class UriHolder
{
@Inject(optional=true) @Assisted URI value;
}
}
but UriHolder.uri is always null. Any ideas?
Thanks,
Gili
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