Aggregate
1using System; 2using System.Collections.Generic; 3using System.Text; 4 5namespace Gof.Test.Iterator 6{ 7 public interface Aggregate 8 { 9 Iterator CreateIterator();10 }11}12
ConcreteAggregate
1using System; 2using System.Collections.Generic; 3using System.Text; 4 5namespace Gof.Test.Iterator 6{ 7 public class ConcreteAggregate : Aggregate 8 { 9 Aggregate 成员#region Aggregate 成员1011 public Iterator CreateIterator()12 {13 return new ConcreteIterator(this);14 }1516 #endregion1718 private System.Collections.ArrayList items = new System.Collections.ArrayList();1920 public int Count21 {22 get23 {24 return items.Count;25 }26 }2728 public object this[int index]29 {30 get31 {32 return (object)items[index];33 }34 set35 {36 items.Insert(index, value);37 }38 }39 }40}
Iterator
1using System; 2using System.Collections.Generic; 3using System.Text; 4 5namespace Gof.Test.Iterator 6{ 7 public interface Iterator 8 { 9 object First();10 object Next();11 bool isDone();12 object Current();13 }14}
ConcreteIterator
1using System; 2using System.Collections.Generic; 3using System.Text; 4 5namespace Gof.Test.Iterator 6{ 7 public class ConcreteIterator : Iterator 8 { 9 private ConcreteAggregate concreteAggregate;10 private int current = 0;1112 public ConcreteIterator(ConcreteAggregate t)13 {14 concreteAggregate = t; 15 }1617 Iterator 成员#region Iterator 成员1819 public object First()20 {21 return concreteAggregate[0];22 }2324 public object Next()25 {26 if (current < concreteAggregate.Count - 1)27 {28 return concreteAggregate[current++];29 }30 return null;31 }3233 public bool isDone()34 {35 return current >= concreteAggregate.Count ? true : false;36 }3738 public object Current()39 {40 return concreteAggregate[current];41 }4243 #endregion44 }45}
客户代码
1 ConcreteAggregate a = new ConcreteAggregate(); 2 a[0] = "0"; 3 a[1] = "00"; 4 a[2] = "000"; 5 a[3] = "0000"; 6 a[4] = "00000"; 7 a[5] = "000000"; 8 9 ConcreteIterator i = new ConcreteIterator(a);1011 Console.WriteLine("begin");1213 object item = i.First();1415 while (item != null)16 {17 Console.WriteLine(item);18 item = i.Next();19 }2021 Console.ReadKey();
转载于:https://www.cnblogs.com/nanshouyong326/archive/2007/01/17/622518.html
