groovy method dispatching with a little help

missingMethodMultipleDispatch.groovy

class Magic {

  def methodMissing(String methodName, Object arguments) {
    method(methodName, *arguments)
  }

  private method(String methodName, Object... arguments) {
    if (!(arguments[-1] instanceof Closure))
      throw new MissingMethodException(methodName, this.class, arguments)
    method(methodName, arguments[-1], *arguments[0..-2])
  }

  private method(String methodName, Map map, Object... arguments) {
    if (!(arguments[-1] instanceof Closure))
      throw new MissingMethodException(methodName, this.class, arguments)
    method(methodName, map, arguments[-1], *arguments[0..-2])
  }

  private method(String methodName, String... strings) {
    println "$methodName(String... $strings)"
  }

  private method(String methodName, Map map) {
    println "$methodName(Map $map)"
  }

  private method(String methodName, Closure closure) {
    println "$methodName(Closure ${closure()})"
  }

  private method(String methodName, Map map, String... strings) {
    println "$methodName(Map $map, String... $strings)"
  }

  private method(String methodName, Closure closure, String... strings) {
    println "$methodName(Closure ${closure()}, String... $strings)"
  }

  private method(String methodName, Map map, Closure closure) {
    println "$methodName(Map $map, Closure ${closure()})"
  }

  private method(String methodName, Map map, Closure closure, String... strings) {
    println "$methodName(Map $map, Closure ${closure()}, String... $strings)"
  }

}

new Magic().with {
  s "string1", "string2"
  // s(String... [string1, string2])
  m key1: "value1", key2: "value2"
  // m(Map [key1:value1, key2:value2])
  c {"closure"}
  // c(Closure closure)
  sm "string1", key1: "value1", "string2", key2: "value2"
  // sm(Map [key1:value1, key2:value2], String... [string1, string2])
  sc "string1", "string2", {"closure"}
  // sc(Closure closure, String... [string1, string2])
  mc key1: "value1", key2: "value2", {"closure"}
  // mc(Map [key1:value1, key2:value2], Closure closure)
  smc "string1", key1: "value1", "string2", key2: "value2", {"closure"}
  // smc(Map [key1:value1, key2:value2], Closure closure, String... [string1, string2])
}