Refactoring ----Move Method(将方法移至常被调用的class中)

时间：2011-02-16 来源：无为是最高

/// <summary>
/// 简单的银行帐号类
/// </summary>
public class BankAccount
{
    public BankAccount(int accountAge, int creditScore,AccountInterest accountInterest)
    {
        AccountAge = accountAge;
        CreditScore = creditScore;
        AccountInterest = accountInterest;
    }

     public int AccountAge { get; private set; }
     public int CreditScore { get; private set; }
     public AccountInterest AccountInterest { get; private set; }

}

/// <summary>
/// 利息
/// </summary>
public class AccountInterest
{
     public BankAccount Account { get; private set; }

     public AccountInterest(BankAccount account)
     {
         Account = account;
     }

     public double InterestRate
     {
         get { return  CalculateInterestRate(); }
     }

     public bool IntroductoryRate
     {
         get { return   CalculateInterestRate() < 0.05; }
     }
     /// <summary>
     /// 方法存活在被常调用的类中，其逻辑和此类的关系更为密切。
     /// </summary>
     /// <returns></returns>
     public double CalculateInterestRate()
     {
         if (CreditScore > 800)
             return 0.02;

         if (AccountAge > 10)
             return 0.03;

         return 0.05;
     }
}

可维护性是衡量代码质量重要的标准之一，此重构值得考虑！

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