head first 设计模式学习随笔(10)----组合模式

/// <summary>
/// 组合模式 抽象类
/// </summary>
public abstract class Component
{
public abstract string GetInfo();
public abstract List<Component> GetChilds();
public abstract void AddChild(Component com);
public abstract void RemoveChild(Component com);

/// <summary>
/// 打印全部信息
/// </summary>
public void PrintAll()
{
Print(this,0);
}

/// <summary>
/// 递归方法遍历所有
/// </summary>
/// <param name="com"></param>
/// <param name="i"></param>
private void Print(Component com,int i)
{
Console.WriteLine(GetTab(i) + com.GetInfo());
List<Component> childs =com.GetChilds();
if (childs != null)
{
foreach (Component list in childs)
Print(list, ++i);
}
}

/// <summary>
/// 这里是tab 为了使得层次更加清晰
/// </summary>
/// <param name="i"></param>
/// <returns></returns>
private string GetTab(int i)
{
string tab="";
for (int j = 0; j < i; j++)
tab += "\t";
return tab;
}
}

/// <summary>
/// 河 可以有分支溪流组成
/// </summary>
public class River : Component
{
List<Component> Rivers;
string info;

public River(string info)
{
Rivers = new List<Component>();
this.info = info;
}

public override string GetInfo()
{
return info;
}

public override List<Component> GetChilds()
{
return this.Rivers;
}

public override void AddChild(Component com)
{
Rivers.Add(com);
}

public override void RemoveChild(Component com)
{
Rivers.Remove(com);
}
}

/// <summary>
/// 溪流 没有分支啦
/// </summary>
public class Rivulet : Component
{
string info;

public Rivulet(string info)
{
this.info = info;
}

public override string GetInfo()
{
return info;
}

public override List<Component> GetChilds()
{
return null;
}

#region 以下2个方法不实现

public override void AddChild(Component com)
{
throw new NotImplementedException();
}

public override void RemoveChild(Component com)
{
throw new NotImplementedException();
}

#endregion

}

class Program
{
static void Main(string[] args)
{
River changjiang = new River("长江");
River yalongjiang = new River("雅砻江");
River minjiang = new River("岷江");

Rivulet tuotuohe = new Rivulet("沱沱河");
Rivulet tongtianhe = new Rivulet("通天河");
Rivulet daduhe = new Rivulet("大渡河");
Rivulet jialingjiang = new Rivulet("嘉陵江");
Rivulet wujiang = new Rivulet("乌江");
Rivulet yuanjiang = new Rivulet("沅江");
Rivulet xiangjiang = new Rivulet("湘江");
Rivulet hanjiang = new Rivulet("汉江");
Rivulet ganjiang = new Rivulet("赣江");
Rivulet huangpujiang = new Rivulet("黄浦江");

yalongjiang.AddChild(daduhe);
yalongjiang.AddChild(jialingjiang);
yalongjiang.AddChild(wujiang);

minjiang.AddChild(yuanjiang);
minjiang.AddChild(xiangjiang);
minjiang.AddChild(hanjiang);
minjiang.AddChild(ganjiang);

changjiang.AddChild(tuotuohe);
changjiang.AddChild(tongtianhe);
changjiang.AddChild(yalongjiang);
changjiang.AddChild(minjiang);
changjiang.AddChild(huangpujiang);

changjiang.PrintAll();

Console.Read();
}
}