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kotlindependency-injectionkodein

How can I use Kodein's direct retrieval to fetch a dependency bound as a factory?


Consider the following injector:

class Injector constructor(secretSauce: SecretSauce) {
    val kodein = Kodein {
        bind<SpicyBeans>() with factory { beans: List<Bean>, herbs: List<Herb> ->
            SpicyBeans(secretSauce, beans, herbs)
        }
    }
}

And the following business logic:

class TastyMeal {
  private lateinit var injector : Kodein
  private lateinit var spicyBeans : SpicyBeans

  fun initialiseWithInjector(kodein : Kodein) {
    injector = kodein
    val herbs = listOf(Coriander(), Cumin())
    val beans = listOf(Pinto(), BlackEyed())
    // fetch SpicyBeans via given Kodein Factory, given herbs and beans here
  }
}

How can I use Kodein's direct injection feature to fetch a SpicyBeans instance using a factory, passing in List<Herb> and List<Bean> after TastyMeal is instantiated? I can't find an example in the documentation.


Solution

  • The solution is called multi-argument factories. The documentation about this is very scarce (This is a problem, can you open a ticket so I can be reminded to improve the doc?).

    In the meantime, here is your solution:

    val tastyDish: SpicyBeans by kodein.instance(arg = M(beans, herbs))