Status: New
Owner: ----
New issue 655 by [email protected]: Provider Factory and then Inject what
the Provider returns
http://code.google.com/p/google-guice/issues/detail?id=655
I think this is partly related to Issue #131, FactoryModuleBuilder & Co but
with a slightly different twist. I'm not interested in the Factories
themselves (which seems to be the purpose of FactoryModuleBuilder and
FactoryProvider) but would rather tell Guice how to create Objects for me
with some arguments that I provide and with some arguments that Guice can
inject for me.
Here is an example where I provide the type of my POJO, Guice injects some
additional stuff to my factory method and I do something with it (e.g. use
the arguments to read some resource such as JSON/XML and create a POJO from
that).
public class ConfigModule extends AbstractModule {
@Override
protected void configure() {
bind(PicasaConfig.class).toFactory(new
ConfigFactory<PicasaConfig>(PicasaConfig.class));
bind(FlickrConfig.class).toFactory(new
ConfigFactory<FlickrConfig>(FlickrConfig.class));
}
}
public class ConfigFactory<T> {
private final Class<T> type;
public ConfigFactory(Class<T> type) {
this.type = type;
}
@Provides @Inject
public T create(@Named("mv.config.cl") ClassLoader loader,
@Named("my.env") String environment) {
return DoSomeMagic.newInstance(loader, environment, type);
}
}
@Singleton
public class PicasaProcessor {
private final PicasaConfig config;
@Inject
public PicasaProcessor(PicasaConfig config) {
this.config = config;
}
}
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