@startuml

skinparam class {
	BackgroundColor White
	ArrowColor Grey
	BorderColor Black
}
skinparam shadowing false

package Scoring {  
    package List {
        class ListFunction
        class ListToListFunction
        class ListToValueFunction
        class Average
        class Product
        class ForEachValue
    }

    package Value {
        class ValueFunction
        class Threshold
    }

    package Rating {
        class RatingToListConverter
        class FlatToListConverter
        class PerUserToListConverter
        class PerFeatureToListConverter
    }


    ScoringFunction --> "1..*" RatingToListConverter : Stage 1
    ScoringFunction --> "0..*" ListToListFunction : Stage 2
    ScoringFunction --> "1..*" ListToValueFunction : Stage 3
    ScoringFunction --> "0..*" ValueFunction : Stage 4

    class ScoringFunction{

    }

    abstract class RatingToListConverter {

    }

    RatingToListConverter <|-- PerFeatureToListConverter
    PerFeatureToListConverter --> ListToValueFunction :uses
    class PerFeatureToListConverter {

    }
    RatingToListConverter <|-- PerUserToListConverter
    PerUserToListConverter --> ListToValueFunction :uses
    class PerUserToListConverter {

    }
    RatingToListConverter <|-- FlatToListConverter
    class FlatToListConverter {

    }
 
    abstract class ListFunction {

    }

    ListFunction <|-- ListToListFunction
    abstract class ListToListFunction {

    }

    ListToListFunction <|-- ForEachValue
    ForEachValue --> ValueFunction:uses
    class ForEachValue {

    }


    ListFunction <|-- ListToValueFunction
    abstract class ListToValueFunction {
        
    }

    ListToValueFunction <|-- Average
    class Average {
        
    }
    ListToValueFunction <|-- Product
    class Product {

    }

    abstract class ValueFunction{

    }

    ValueFunction <|-- Threshold
    class Threshold {
        
    }
}



@enduml