我无法控制的两个第三方类的通用接口.外部多态性？

Question

我需要一个小模式方向.C#的新手.

我正在使用包装Web服务的第三方开发工具包.我处理的两个特定类虽然相对类似,但是在devkit中有两个不同的命名空间,并且没有共同的基类.但是,我想为它们编写一个针对它们的通用接口.我随意地将一个基本上包装了包装器的实现组合在一起,但我觉得由于不断的类型转换,我认为它不是最有效的方法.

我一直在挖掘关于适配器,接口,扩展方法等的文章.但是我的运行时间很少,所以如果我能够在一个方向上推动,那将非常感激.

using ThirdParty.TypeA.Employee;
using ThirdParty.TypeB.Employee;

public class Employee
{
     private object genericEmployee;

     private EmployeeType empType;

     public enum EmployeeType
     {
          TypeA = 0;
          TypeB = 1;
     }   

     public Employee(Object employee, EmployeeType type)
     {
         genericEmployee = employee;
         empType = type;
     }

     public String Name
     {
         if (empType == EmployeeType.TypeA)
             return (ThirdParty.TypeA.Employee)genericEmployee.Name;
         else
             return (ThirdParty.TypeB.Employee)genericEmployee.Name;
     }

     public String Age
     {
         if (empType == EmployeeType.TypeA)
             return (ThirdParty.TypeA.Employee)genericEmployee.Age;
         else
             return (ThirdParty.TypeB.Employee)genericEmployee.Age;
     }
 }

第2版​​:

class EmployeeTypeAAdapter : TypeA, IEmployeeAdapter
{
    TypeA _employee;
    public EmployeeTypeAAdapter(TypeA employee) 
    { 
         _employee = employee
    }

     public String Name
     {
        get { return _employee.Name; }  
        set { _employee.Name = value; }
     } 

      public String Balance
      {
        get
        {
            if (_employee.Balance != null)
            {
                decimal c = _employee.Balance.Amount;
                return String.Format("{0:C}", c);
            }
            else
            {
                return "";
            }
          }
       }  

       //...
}

class EmployeeTypeBAdapter : TypeB, IEmployeeAdapter
{
    TypeB _employee;
    public EmployeeTypeAAdapter(TypeB employee) 
    { 
         _employee = employee
    }

     public String Name
     {
        get { return _employee.Name; }  
        set { _employee.Name = value; }
     } 

      public String Balance
      {
        get
        {
            if (_employee.Balance != null)
            {
                decimal c = _employee.Balance.Amount;
                return String.Format("{0:C}", c);
            }
            else
            {
                return "";
            }
          }
       }  

     //....
}

Answer 1

试试这种方法:

public interface IEmployeeAdapter
{
    string Age { get; set; }
    string Name { get; set; }
}

class EmployeeTypeAAdapter : TypeA, IEmployeeAdapter
{
    public EmployeeTypeAAdapter(TypeA employee) { }
}

class EmployeeTypeBAdapter : TypeB, IEmployeeAdapter
{
    public EmployeeTypeBAdapter(TypeB employee) { }
}

public static class EmployeeAdapterFactory
{
    public static IEmployeeAdapter CreateAdapter(object employee, EmployeeType type)
    {
        switch (type)
        {
            case EmployeeType.TypeA: return new EmployeeTypeAAdapter((TypeA)employee);
            case EmployeeType.TypeB: return new EmployeeTypeBAdapter((TypeB)employee);
        }
    }

    // or without enum

    public static IEmployeeAdapter CreateAdapter(object employee)
    {
        if (employee is TypeA) return new EmployeeTypeAAdapter((TypeA)employee);
        if (employee is TypeB) return new EmployeeTypeABdapter((TypeB)employee);
    }

    // or better introduce sort of type map
}

另一个专有名称是EmployeeProxy,如您所愿.