On Tuesday, May 22, 2012 11:41:14 AM UTC+2, tanteanni wrote:
>
> thx thomas for fast reply,
>
> the problem is indeed that two instances are created one "
> PlaceHistoryMapperWithFactory<TokenizerFactory> " instance and one
> instances where constructors inject "AppPlaceHistoryMapper" (this one has
> null factory).
> But how to fix this? Your suggested provides-Code shouldn't change
> anything, should it?
>
It depends.
If you have code that depends on AppPlaceHistoryMapper, then change the
return type of the provider-method to that.
And if some code depends on
PlaceHistoryMapperWithFactory<TokenizerFactory>, and/or PlaceHistoryMapper,
then bind those types to AppPlaceHistoryMapper (see below).
> So I tried your 2nd suggestion:
> plus this in module:
>
>> bind(new
>>> TypeLiteral<PlaceHistoryMapperWithFactory<TokenizerFactory>>() {
>>
>> }).to(AppPlaceHistoryMapper.class).in(Singleton.class);
>>
>> *It is working! *
> But with this every user of AppPlaceHistoryMapper get a different instance
> - (i guess this is not really a problem) - is it possible to get/bind a
> singleton.
> Is it possible to bind AppPlaceHistoryMapper
> and PlaceHistoryMapperWithFactory<TokenizerFactory> to the same instance
> of generated AppPlaceHistoryMapper Impl?
>
Yes:
bind(new TypeLiteral<PlaceHistoryMapperWithFactory<TokenizerFactory>>() {
}).to(AppPlaceHistoryMapper.class);
bind(AppPlaceHistoryMapper.class).in(Singleton.class); // either that, or a
@Provides @Singleton method.
i.e.: when you need a PlaceHistoryMapperWithFactory<TokenizerFactory>, then
use an AppPlaceHistoryMapper; and when you need an AppPlaceHistoryMapper,
then bind it as a singleton.
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