title File Upload Filters/Handlers - Chain Of Responsibility & Singleton

@startuml

class Connection {
  - RootHandler
}

interface IHandler {
  + handle()
  + setNext(Handler)
}

class Handler {
  + handle()
  + setNext(Handler)
}

Handler *..> IHandler

class PathModifier extends Handler {
  + handle()
}

class Reverse extends Handler {
  + handle()
}

class Clipboard {
    - static instance
    - Data
    + static instance()
}

class Cut extends Handler {
  - Clipboard
  + handle()
}

class Paste extends Handler  {
  - Clipboard
  + handle()
}

Clipboard <-down- Paste
Clipboard <-down- Cut

hide empty members

Connection -> Handler
Handler -> Handler


@enduml