Hands-On Design Patterns with Kotlin

Adapters in the real world

You've probably encountered those adapters too. Mostly, they adapt between concepts and implementations. For example, let's take the concept of collection versus the concept of a stream:

val l = listOf("a", "b", "c")fun <T> streamProcessing(stream: Stream<T>) {     // Do something with stream}

You cannot simply pass a collection to a function that receives a stream, even though it may make sense:

streamProcessing(l) // Doesn't compile

Luckily, collections provide us with the .stream() method:

streamProcessing(l.stream()) // Adapted successfully