[設計模式練習]組合模式

2010-04-08

將學校的組織及業務利用組合模式設計

類別圖

物件檔定義


using System.Collections.Generic;
using System.Text;

namespace DesignModelTest.組合
{
    /// <summary>
    /// 抽象類別:學校
    /// </summary>
    abstract class School
    {
        protected string name;
        public School(string name)
        {
            this.name = name;
        }
        public abstract void Add(School c);//增加
        public abstract void Remove(School c);//移除
        public abstract void Display(int depth);//顯示深度
        public abstract void Services();//業務
    }
    /// <summary>
    /// 節點:學校分校
    /// </summary>
    class ConcreteSchool : School
    {
        private List<School> children = new List<School>();//子節點
        public ConcreteSchool(string name) : base(name) { }
        public override void Add(School c)
        {
            children.Add(c);
        }
        public override void Remove(School c)
        {
            children.Remove(c);
        }
        public override void Display(int depth)
        {
            Console.WriteLine(new string('-', depth) + name);
            foreach (School school in children)
            {
                school.Display(depth + 2);
            }
        }
        public override void Services()
        {
            foreach (School school in children)
            {
                school.Services();
            }
        }
    }
    /// <summary>
    /// 葉:工學院
    /// </summary>
    class Engineering : School
    {
        
        public Engineering(string name) : base(name) { }
        public override void Add(School c)
        {
            
        }
        public override void Remove(School c)
        {
            
        }
        public override void Display(int depth)
        {
            Console.WriteLine(new string('-', depth) + name);
            
        }
        public override void Services()
        {
            Console.WriteLine("{0} : 工學院業務 ", this.name);            
        }
    }
    /// <summary>
    /// 葉:文學院
    /// </summary>
    class  Liberal : School
    {

        public Liberal(string name) : base(name) { }
        public override void Add(School c)
        {

        }
        public override void Remove(School c)
        {

        }
        public override void Display(int depth)
        {
            Console.WriteLine(new string('-', depth) + name);

        }
        public override void Services()
        {
            Console.WriteLine("{0} : 文學院業務 ", this.name);
        }
    }
}

用戶端程式碼


            //設定根
            DesignModelTest.組合.School root = new DesignModelTest.組合.ConcreteSchool("學校總部");
            //增加葉
            root.Add(new DesignModelTest.組合.Engineering("學校總部工學院"));
            //增加葉
            root.Add(new DesignModelTest.組合.Liberal("學校總部文學院"));
            DesignModelTest.組合.School comp = new DesignModelTest.組合.ConcreteSchool("學校分部一");
            comp.Add(new DesignModelTest.組合.Engineering("學校分部一工學院"));
            comp.Add(new DesignModelTest.組合.Liberal("學校分部一文學院"));
            //將節點(包括子節點及葉)加入根
            root.Add(comp);            
            Console.WriteLine("\n結構圖");
            root.Display(1);
            //從根目錄開始作業
            Console.WriteLine("\n業務");
            root.Services();
            Console.Read();
            #endregion

輸出結果

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