@startuml
package com.iluwatar.chain {
  class App {
    + App()
    + main(args : String[]) {static}
  }
  class OrcCommander {
    + OrcCommander(handler : RequestHandler)
    + handleRequest(req : Request)
    + toString() : String
  }
  class OrcKing {
    - chain : RequestHandler
    + OrcKing()
    - buildChain()
    + makeRequest(req : Request)
  }
  class OrcOfficer {
    + OrcOfficer(handler : RequestHandler)
    + handleRequest(req : Request)
    + toString() : String
  }
  class OrcSoldier {
    + OrcSoldier(handler : RequestHandler)
    + handleRequest(req : Request)
    + toString() : String
  }
  class Request {
    - handled : boolean
    - requestDescription : String
    - requestType : RequestType
    + Request(requestType : RequestType, requestDescription : String)
    + getRequestDescription() : String
    + getRequestType() : RequestType
    + isHandled() : boolean
    + markHandled()
    + toString() : String
  }
  abstract class RequestHandler {
    - LOGGER : Logger {static}
    - next : RequestHandler
    + RequestHandler(next : RequestHandler)
    + handleRequest(req : Request)
    # printHandling(req : Request)
    + toString() : String {abstract}
  }
  enum RequestType {
    + COLLECT_TAX {static}
    + DEFEND_CASTLE {static}
    + TORTURE_PRISONER {static}
    + valueOf(name : String) : RequestType {static}
    + values() : RequestType[] {static}
  }
}
OrcKing -->  "-chain" RequestHandler
RequestHandler -->  "-next" RequestHandler
Request -->  "-requestType" RequestType
OrcCommander --|> RequestHandler 
OrcOfficer --|> RequestHandler 
OrcSoldier --|> RequestHandler 
@enduml