@startuml
Target <-- Client
Target <|-- ClassAdapter
Target <|-- ObjectAdapter
Adaptee <|-- ClassAdapter
Adaptee <--o ObjectAdapter

interface Target {
  {abstract} +Request()
}
class Adaptee {
  +SpecificRequest()
}
class ClassAdapter {
  +Request()
}
class ObjectAdapter {
  -anAdaptee
  +Request()
}

note bottom of ObjectAdapter
  ObjectAdapter::Request() {
    return anAdaptee.SpecificRequest();
  }
end note

note bottom of ClassAdapter
  ClassAdapter::Request() {
    return Adaptee::SpecificRequest();
  }
end note

hide empty attributes
hide empty methods
@enduml