@startuml
Flyweight <--* FlyweightFactory
Flyweight <|-- SharedFlyweight
Flyweight <|-- UnsharedFlyweight
FlyweightFactory <-- Client
SharedFlyweight <-- Client
UnsharedFlyweight <-- Client

interface Flyweight {
  {abstract} +Request(ExtrinsicState)
}
class SharedFlyweight {
  -intrinsicState : IntrinsicState
  +Request(ExtrinsicState)
}
class UnsharedFlyweight {
  -intrinsicState : IntrinsicState
  -extrinsicState : ExtrinsicState
  +Request(ExtrinsicState)
}
class FlyweightFactory {
  -flyweights : Map<Key, Flyweight*>
  +GetFlyweight(Key) : Flyweight
}

hide empty attributes
hide empty methods
@enduml