using System;

using System.Collections;

using System.Collections.Generic;

//Useful for hierarchical relationships

//This example will use a component Interface called IEmployee, a leaf class Employee implementing Iemployee and a Supervisor which implements IEmployee

//We are using this because of the fact that the supervisors can have children

//AND that there is shared functionality between supervisors and the employees

//This is very similar to the parent-child relationship in the p21 table oe_line

public class Program

{

    public static void Main()

    {

        Supervisor patrick = new Supervisor {Name = "Patrick", Rating = 3, EmployeeId = 1};

        Employee foley = new Employee {Name = "Foley", Rating = 3, EmployeeId = 2};

        Employee ryan = new Employee {Name = "Ryan", Rating = 3, EmployeeId = 3};

        Supervisor jay = new Supervisor {Name = "Jay", Rating = 3, EmployeeId = 4};

        Employee yusuf = new Employee {Name = "Yusuf", Rating = 3, EmployeeId = 5};

        patrick.AddSubordinate(foley);

        patrick.AddSubordinate(yusuf);

        jay.AddSubordinate(patrick);

        jay.AddSubordinate(ryan);

        jay.PerformanceSummary();

        patrick.PerformanceSummary();

    }

}

​

//Composite Component Interface

public interface IEmployee {

    int EmployeeId {get; set;}

    string Name {get; set;}

    int Rating {get; set;}

    void PerformanceSummary();

}

​

//Leaf class

public class Employee : IEmployee {

    public int EmployeeId {get; set;}

    public string Name {get; set;}

    public int Rating {get; set;}

    public void PerformanceSummary() {

        string msg = string.Format("{0} has a rating of {1}\n",Name,Rating);

        Console.WriteLine(msg); 

    }

}

​

//Composite Class

public class Supervisor : IEmployee {

    public int EmployeeId {get; set;}

    public string Name {get; set;}

    public int Rating {get; set;}

    public void PerformanceSummary() {

        string msg = string.Format("{0} has a rating of {1}\n",Name,Rating);

        Console.WriteLine(msg); 

        Console.WriteLine("Subordinate summary:\n"); 

        foreach(var subordinate in ListSubordinates) {

            subordinate.PerformanceSummary();

        }

    }

    public List<IEmployee> ListSubordinates = new List<IEmployee>();

    public void AddSubordinate(IEmployee subordinate) {

        ListSubordinates.Add(subordinate);

    }

}