Dagger ‐ multi binding IntoSet

Contents
Observations
Output
Code

Observations

Output

Code

Contents
Scopes
Implementations
Modules
Components
Activity

Scopes

Implementations

Telivision.kt

interface Telivision {
    fun name() : String
}

Samsung.kt

class Samsung @Inject constructor() : Telivision {
    override fun name(): String {
        return "Samsung ^-^ Output"
    }
}

Lg.kt

class Lg @Inject constructor() : Telivision {
    override fun name(): String {
        return "Lg ^-^ Output"
    }
}

TelivisionBox.kt

class TelivisionBox @Inject constructor(
    val telivision : Telivision
) { }

Modules

TelivisionModule.kt

@Module
@DisableInstallInCheck
interface TelivisionModule {

    @Binds
    @IntoSet
    fun providesSamsungTv(implementation : Samsung) : Telivision

    @Binds
    @IntoSet
    fun providesLgTv(implementation : Lg) : Telivision

}

Components

TelivisionComponent.kt

@Component(modules = [TelivisionModule::class])
interface TelivisionComponent {
    fun inject(activity : MyActivity)
    fun provideTelivision() : Set<@JvmSuppressWildcards Telivision>
}

Activity

MyActivity.kt

class DaggerMultiBindingIntoSetActivity : AppCompatActivity() {

    private lateinit var binding: ActivityDaggerMultiBindingIntoSetBinding

    @Inject lateinit var telivision: Set<@JvmSuppressWildcards Telivision>

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        binding = ActivityDaggerMultiBindingIntoSetBinding.inflate(layoutInflater)
        setContentView(binding.root)
        setOnClickListeners();
    }

    private fun setOnClickListeners() {
        binding.apply {
            initiateId.setOnClickListener {
                // Inject the component into the activity
                val comp = DaggerTelivisionComponent.builder().build()
                comp.inject(this@DaggerMultiBindingIntoSetActivity)
                // Print the entire set
                println(telivision)
                // Iterate the set of objects
                telivision.forEach { tv ->
                    if(tv is Samsung){
                        // Access Samsung specific functionalities
                        println(tv.name())
                    }else if(tv is Lg){
                        // Access Lg specific functionalities
                        println(tv.name())
                    }
                }
            }
        }
    }

}