How to call function that takes callbacks as parameters in Java

Question

I'm trying to implement ReachFive in my android app and I have to call the initialize method.

This is how they call it in the documentation:

    // Initialize the ReachFive client
    client.initialize({ providers ->
        // On success, do something with the retrieved list of providers registered for this ReachFive client
        // ...
    }, {
        // On failure, log the error message returned by the ReachFive client
        Log.d("Reach5_MainActivity", "ReachFive init ${it.message}")
    })

But this code sample is in Kotlin and I have no idea how to call the initialize method in java.

Edit: This is the initialize function find inside the SDK code:

fun initialize(
    success: Success<List<Provider>> = {},
    failure: Failure<ReachFiveError> = {}
): ReachFive {
    reachFiveApi
        .clientConfig(mapOf("client_id" to sdkConfig.clientId))
        .enqueue(
            ReachFiveApiCallback<ClientConfigResponse>(
                success = { clientConfig ->
                    scope = clientConfig.scope.split(" ").toSet()
                    providersConfigs(success, failure)
                },
                failure = failure
            )
        )

    return this
}

Each lambda is functional interface. docs.oracle.com/javase/tutorial/java/javaOO/… — Artem Botnev
– Artem Botnev, Commented Dec 18, 2019 at 11:08

Steyrix · Accepted Answer · 2019-12-18 11:21:38Z

2

Try this (put the implementation/logic of your functions instead of dots)

client.initialize((providers) -> {...}, (error) -> {...});

Note that your first method should return an instance of Success<List<Provider>> and your second lambda should return Failure<ReachFiveError>.

edited Dec 18, 2019 at 11:21

answered Dec 18, 2019 at 11:14

Steyrix

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2 Comments

R3J3CT3D Over a year ago

That's it ! Thank you :)

Steyrix Over a year ago

@R3J3CT3D you are welcome! Please note, that the method above simply passes objects of Functional Interface to initialize method. In my answer I declared them anonymously, whereas they can also be declared explicitly. You should read about it more

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