Setup Guice bindings in Kotlin

Question

I want to setup Guice bindings so I created a module in Java that works perfectly:

public class CrashLoggerModule extends AbstractModule {
    @Override
    public void configure() {
        bind(CrashLogger.class).to(ConcreteCrashLogger.class);
    }
}

Then I converted this code to Kotlin:

public class CrashLoggerModule : AbstractModule() {
    override fun configure() {
        bind(javaClass<CrashLogger>()).to(javaClass<ConcreteCrashLogger>())
    }
}

Unfortunately, the Kotlin version of this class doesn't work anymore. This happens because Kotlin calls its internal method public fun <A, B> A.to(that: B): Pair<A, B> instead of LinkedBindingBuilder<T>.to(Class<? extends T> c) which results in Guice binding not being set up correctly.

How can I specify explicitly that I want to use the class method and not the extension function?

score 4 · Accepted Answer · answered Jul 04 '14 at 08:56

4

Easiest way is:

bind(javaClass<CrashLogger>())!!.to(javaClass<ConcreteCrashLogger>())

you can also do an explicit cast to the type bind returns or run KAnnotator on Guice.

answered Jul 04 '14 at 08:56

Hadi Hariri

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13

Brilliant! I didn't notice `bind()` returns a nullable reference. – Michael Jul 04 '14 at 09:05
1

But we still need to remove a.to(b) method from stdlib, it's clashing with so many things... – Ilya Ryzhenkov Jul 04 '14 at 20:57
This isn't a problem anymore since the member function now takes precedence over an extension function. – Jayson Minard Dec 30 '15 at 21:54

score 4 · Answer 2 · answered Feb 19 '17 at 18:51

I had equal problem with this code, but in my case I can't import function kotlin.jvm.javaClass in Intellij IDEA 2016 no matter what I do. So I resolve problem in following way:

bind(CrashLogger::class.java).to(ConcreteCrashLogger::class.java)

//kotlin version = '1.0.6'

Setup Guice bindings in Kotlin

2 Answers2