Fluently build Play! routes

RouteBuilder

import play.mvc.Controller;
import play.mvc.Router;

import java.util.Map;

import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.collect.Maps.newHashMap;

public class RouteBuilder {
    private final Class<? extends Controller> controller;
    private final Map<String, Object> params = newHashMap();
    private final String action;

    public RouteBuilder(Class<? extends Controller> controller, String action) {
        this.controller = controller;
        this.action = action;
    }

    public String route() {
        return Router.reverse(controller.getName() + "." + action, params).url;
    }

    public RouteBuilder addParam(String key, Object value) {
        checkArgument(!params.containsKey(key));
        params.put(key, value);
        return this;
    }
}

Usage

new RouteBuilder(Application.class, "index")
    .addParam("name", "Ron")
    .addParam("age", 30)
    .route()