short answer: go with multiple install() calls.
you can mitigate the cost by doing this in a loop, which will allow you to
do something like create a list of {TypeLiteral, Impl} pairs and iterate
over them to make each call to install().
Fred
On Sat, Aug 13, 2011 at 4:30 AM, Oleg Estekhin <[email protected]>wrote:
> The documentation for assisted inject should be really updated with
> examples of generic factory, as this kind of question seems to appear
> every where on the internet but there are no answers =\
>
> So far i got the following code to be working:
>
> class Node<T>{} - a base class for nodes, lets say nodes in a tree,
> where each subclass handles a particular type of content.
>
> class NodeFactory<T> {
> Node<T> createNode(T content);
> }
>
>
> The module contains the following code:
>
> install( new FactoryModuleBuilder()
> .implement( new TypeLiteral<Node<SomeContentType>>()
> {}, SomeContentTypeNodeImpl.class )
> .build( new
> TypeLiteral<NodeFactory<SomeContentType>>() {} ) );
>
> which allows me to inject NodeFactory<SomeContentType>.
>
> What should i do if i want to be able to inject
> NodeFactory<AnotherContentType>?
>
> Should i "install(...)" a separate FactoryModuleBuilder configured
> with AnotherContentType, or is it possible to add "implement()" to the
> code above and modify the "build()" in such a way, that a single
> "install()" will configure the NodeFactory both for SomeContentType
> and AnotherContentType?
>
> I will probably have a dozen of FooContentType's, so having a single
> "install()" with multiple "implement()" seems/feels to be better that
> having a dozen of "install()"s, each with a single "implement()", or
> should i just go for a multiple "install()"s?
>
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