@startuml

class Task {
  -id: int
  -totalExecutionTime: int
  -priority: int
  --
  +Task(id: int, totalExecutionTime: int, priority: int)
  +Task(id: int, totalExecutionTime: int)
  +getId(): int
  +getTotalExecutionTime(): int
  +getPriority(): int
}

interface TaskScheduler {
  +scheduleTask(task: Task): void
  +update(int deltaTime): void
}

class FirstComeFirstServedScheduler extends TaskScheduler {}
class PriorityScheduler extends TaskScheduler {}
class RoundRobinScheduler extends TaskScheduler {}
class ShortestRemainingTimeFirstScheduler extends TaskScheduler {}

class Simulator {
  -scheduler: TaskScheduler
  -Map<Integer, List<Task>> tasks
  -deltaTime: int
  -simulateTime: int
  -LinkedHashMap<Integer, Integer> taskCompletedOrder
  -elapsedTime: int
  --
  +Simulator(scheduler: TaskScheduler, tasks: Map<Integer, List<Task>>, deltaTime: int, simulateTime: int)
  +simulate(): LinkedHashMap<Integer, Integer>
}

Task -- TaskScheduler : "1..*"
TaskScheduler -- Simulator : "1"
Simulator ..> Task : "1..*"

@enduml