笔记-大话设计模式-19 组合模式

    abstract class Component
    {
        protected string name;

        public Component(string name)
        {
            this.name = name;
        }

        public abstract void Add(Component c);
        public abstract void Remove(Component c);
        public abstract void Display(int depth);
    }

    class Composite : Component
    {
        private IList<Component> children = new List<Component>();

        public Composite(string name)
            : base(name)
        {

        }

        public override void Add(Component c)
        {
            children.Add(c);
        }

        public override void Remove(Component c)
        {
            children.Remove(c);
        }

        public override void Display(int depth)
        {
            Console.WriteLine(new string(‘-‘, depth) + name);
            foreach (var component in children)
            {
                component.Display(depth + 2);
            }
        }
    }

    class Leaf : Component
    {
        public Leaf(string name)
            : base(name)
        {

        }

        public override void Add(Component c)
        {
            throw new NotImplementedException();
        }

        public override void Remove(Component c)
        {
            throw new NotImplementedException();
        }

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

            Composite root = new Composite("root");
            root.Add(new Leaf("Leaf A"));
            root.Add(new Leaf("Leaf B"));

            Composite firstLevel = new Composite("第一级");
            firstLevel.Add(new Leaf("第一级的叶子"));

            root.Add(firstLevel);

            Composite secondLevel = new Composite("第二级");
            secondLevel.Add(new Leaf("第二级的叶子"));

            firstLevel.Add(secondLevel);

            root.Display(1);

    abstract class Company
    {
        protected string name;

        public Company(string name)
        {
            this.name = name;
        }

        public abstract void Add(Company c);
        public abstract void Remove(Company c);
        public abstract void Display(int depth);
        public abstract void Dutys();
    }

    class ConcreteCompany : Company
    {
        private IList<Company> children = new List<Company>();

        public ConcreteCompany(string name)
            : base(name)
        {

        }

        public override void Add(Company c)
        {
            children.Add(c);
        }

        public override void Remove(Company c)
        {
            children.Remove(c);
        }

        public override void Display(int depth)
        {
            Console.WriteLine(new string(‘-‘, depth) + name);
            foreach (var item in children)
            {
                item.Display(depth + 2);
            }
        }

        public override void Dutys()
        {
            foreach (var item in children)
            {
                item.Dutys();
            }
        }
    }

    class ADepartment : Company
    {
        public ADepartment(string name)
            : base(name)
        {

        }

        public override void Add(Company c)
        {
            throw new NotImplementedException();
        }

        public override void Remove(Company c)
        {
            throw new NotImplementedException();
        }

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

        public override void Dutys()
        {
            Console.WriteLine("{0} 的ADepartment履行职责", name);
        }
    }

    class BDepartment : Company
    {
        public BDepartment(string name)
            : base(name)
        {

        }

        public override void Add(Company c)
        {
            throw new NotImplementedException();
        }

        public override void Remove(Company c)
        {
            throw new NotImplementedException();
        }

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

        public override void Dutys()
        {
            Console.WriteLine("{0} 的BDepartment履行职责", name);
        }
    }

            ConcreteCompany root = new ConcreteCompany("北京总公司");
            root.Add(new ADepartment("总公司A部门"));
            root.Add(new BDepartment("总公司B部门"));

            ConcreteCompany branch1 = new ConcreteCompany("华东分公司");
            branch1.Add(new ADepartment("分公司的A部门"));
            branch1.Add(new BDepartment("分公司的B部门"));

            root.Add(branch1);

            root.Display(1);

            Console.WriteLine(Environment.NewLine);

            root.Dutys();