网站怎么进,wordpress 使用新id,安全网站建设公司,怎么做推广赚钱Unity实现设计模式——责任链模式
责任链模式定义#xff1a;将请求的发送和接收解耦#xff0c;让多个接收对象都有机会处理这个请求。将这些接收对象串成一条链#xff0c;并沿着这条链传递这个请求#xff0c;直到链上的某个接收对象能够处理它为止。
在职责链模式中将请求的发送和接收解耦让多个接收对象都有机会处理这个请求。将这些接收对象串成一条链并沿着这条链传递这个请求直到链上的某个接收对象能够处理它为止。
在职责链模式中多个处理器也就是刚刚定义中说的“接收对象”依次处理同一个请求。一个请求先经过A处理器处理然后再把请求传递给B处理器B处理器处理完后再传递给C处理器以此类推形成一个链条。链条上的每个处理器各自承担各自的处理职责所以叫作职责链模式。 这里使用管理者、副总裁、总裁、依次采购商品的例子 管理者可以去采购商品当采购的数量大于某个阈值时管理者不能完成该任务需要上级去完成当上级也完不成的时候就要向最上级报告处理请求了
1.Approver 管理者的基类 abstract class Approver{protected Approver successor;public void SetSuccessor(Approver successor){this.successor successor;}public abstract void ProcessRequest(Purchase purchase);}2.Director 管理者 class Director : Approver{public override void ProcessRequest(Purchase purchase){if (purchase.Amount 10000.0){Debug.Log(this.GetType().Name approved request# purchase.Number);}else if (successor ! null){successor.ProcessRequest(purchase);}}}3.VicePresident 副总裁 class VicePresident : Approver{public override void ProcessRequest(Purchase purchase){if (purchase.Amount 25000.0){Debug.Log(this.GetType().Name approved request# purchase.Number);}else if (successor ! null){successor.ProcessRequest(purchase);}}}4.President 总裁 class President : Approver{public override void ProcessRequest(Purchase purchase){if (purchase.Amount 100000.0){Debug.Log(this.GetType().Name approved request# purchase.Number);}else{Debug.Log(Request# purchase.Number requires an executive meeting!);}}}5.Purchase 采购的商品 class Purchase{private int _number;private double _amount;private string _purpose;// Constructorpublic Purchase(int number, double amount, string purpose){this._number number;this._amount amount;this._purpose purpose;}// Gets or sets purchase numberpublic int Number{get { return _number; }set { _number value; }}// Gets or sets purchase amountpublic double Amount{get { return _amount; }set { _amount value; }}// Gets or sets purchase purposepublic string Purpose{get { return _purpose; }set { _purpose value; }}}6.测试 public class ChainOfResponsibilityExample1 : MonoBehaviour{void Start ( ){// Setup Chain of ResponsibilityApprover larry new Director();Approver sam new VicePresident();Approver tammy new President();larry.SetSuccessor(sam);sam.SetSuccessor(tammy);// Generate and process purchase requestsPurchase p new Purchase(2034, 350.00, Assets);larry.ProcessRequest(p);p new Purchase(2035, 32590.10, Project X);larry.ProcessRequest(p);p new Purchase(2036, 122100.00, Project Y);larry.ProcessRequest(p);}}
