Apache Camel stop route when all file processed from the folder

fileRoute.java

from("file:{{csv.import.directory}}?sendEmptyMessageWhenIdle=true&include=.*.csv").routeId("route1")
    .autoStartup(false)
    .choice()
        .when(body().isEqualTo(null))
            .log("Stopping route")
            .to("controlbus:route?async=true&routeId=route1&action=stop")
        .otherwise()
            .log("File with the following name processed: ${header.CamelFileName}")
    .end()
;