classDiagram
    class Reader {
        <<abstract>>
        +ReadLine() string*
        +EndOfStream bool
        +Close()
    }
    
    class FileReader {
        -StreamReader _streamReader
        +ReadLine() string*
    }
    
    class ReaderDecorator {
        <<abstract>>
        #Reader _reader
        +ReadLine() string*
    }
    
    class CSVReader {
        +ReadLine() string*
        +ReadCSVLine() string[]*
    }
    
    class EntityReader~T~ {
        <<abstract>>
        #IEntityFactory~T~ _factory
        +ReadEntity(id: int) T*
    }
    
    class MorgReader {
        +ReadEntity(id: int) Morg*
    }
    
    Reader <|-- FileReader : concrete
    Reader <|-- ReaderDecorator : abstract decorator
    ReaderDecorator <|-- CSVReader : decorates with CSV parsing
    ReaderDecorator <|-- EntityReader~T~ : decorates with entity creation
    EntityReader~T~ <|-- MorgReader : Morg specialisation
    ReaderDecorator *-- Reader : wraps
    
    note for ReaderDecorator "Decorator wraps Reader component"
    note for CSVReader "Adds CSV parsing functionality"
    note for EntityReader~T~ "Adds entity creation using Factory"
    note for MorgReader "Morg-specific entity creation"