Creating API that is fluent

Question

How does one go about create an API that is fluent in nature?

Is this using extension methods primarily?

Answer 1

Writting a fluent API it's complicated, that's why I've written Diezel that is a Fluent API generator for Java. It generates the API with interfaces (or course) to:

1. control the calling flow
2. catch generic types (like guice one)

It generates also implementations.

It's a maven plugin.