Vert.x Calliope

Just an experiment, to test different approaches to bring more expressiveness to vertx-web route declaration.

Mostly :

• declaring expected request param/header types (and automatically checking them)
• marshalling / unmarshalling body
• declaring expected body class / body return
• declaring checks and associated status codes
• using map in a functional way directly on routes

TODO :

• add the ability to register marshaller / unmarshaller & not only a full converter
• params / headers marshalling in an single object intParam, dateParam becoming a simple corner case
• map with body / params / headers at the same time i.e.

router.get("/...")
  .withBody(MyBody.class)
  .withParams(MyParams.class)
  .map((body, params) -> { ... })
  .send(200);

• route nesting, i.e.

router.route("/api")
  .consumes(...)
  .get("/tests")
  ...