重构 改善既有代码的设计:重构手法

重构手法

代码的坏味道

以下内容来自《重构—改善既有代码的设计》

 

一、重新组织函数

1、Extract Method (提炼函数)

2、Inline Method (内联函数)

3Inline Temp (内联临时变量)

4Replace Temp with Query (以查询取代临时变量)

5Introduce Explaining Variable (引入解释性变量)

6Split Temporary Variable (分解临时变量)

7Remove Assignments to Parameters (移除对参数的赋值)

8Replace Method with Method Object (以函数对象取代函数)

9Substitute Algorithm (替换算法)

二、在对象之间搬移特性

10Move Method (搬移函数)

11Move Field (搬移字段)

12Extract Class (提炼类)

13Inline Class (将类内联化)

14Hide Delegate (隐藏委托关系)

15Remove Middle Man (移除中间人)

16Introduce Foreign Method (引入外加函数)

17Introduce Local Extension (引入本地扩展)

三、重新组织数据

18Self Encapsulate Field (自封装字段)

19Replace Data Value with Object (以对象取代数据值)

20Change Value to Reference (将值对象改为引用对象)

21Change Reference to Value (将引用对象改为值对象)

22Replace Array with Object (以对象取代数组)

23Duplicate Observed Data (复制“被监视数据”)

24Change Unidirectional Association to Bidirectional (将单向关联改为双向关联)

25Change Bidirectional Association to Unidirectional (将双向关联改为单向关联)

26Replace Magic Number with SymBolic Constant (以字面常量取代魔法数)

27Encapsulated Field (封装字段)

28Encapsulated Collection (封装集合)

29Replace Record with Data Class (以数据类取代记录)

30Replace Type Code with Class (以类取代类型码)

31Replace Type Code with Subclass (以子类取代类型码)

32Replace Type Code with State/Strategy (以状态/策略取代类型码)

33Replace Subclass with Field (以字段取代子类)

四、简化条件表达式

34Decompose Conditional (分解条件表达式)

35Consolidate Conditional Expression (合并条件表达式)

36Consolidate Duplicate Conditional Fragments (合并重复的条件片段)

37Remove Control Flag (移除控制标记)

38Replace Nested Conditional with Guard Clauses (以卫语句取代嵌套条件表达式)

39Replace Conditional with Polymorphism (以多态取代条件表达式)

40Introduce Null Object (引入Null 对象)

41Introduce Assertion (引入断言)

五、简化函数调用

42Rename Method (函数改名)

43Add Parameter (添加参数)

44Remove Parameter (移除参数)

45Separate Query form Modifier (将查询函数和修改函数分离)

46Parameterize Method (令函数携带参数)

47Replace Parameter with Explicit Methods (以明确函数取代参数)

48Preserve Whole Object (保持对象完整)

49Replace Parameter with Methods (以函数取代参数)

50Introduce Parameter Object (引入参数对象)

51Remove Setting Method (移除设置函数)

52Hide Method (隐藏函数)

53Replace Constructor with Factory Method (以工厂函数取代构造函数)

54Encapsulate Downcast (封装向下转型)

55Replace Error Code with Exception (以异常取代错误码)

56Replace Exception with Test (以测试取代异常)

六、处理概括关系

57Pull Up Field (字段上移)

58Pull Up Method (方法上移)

59Pull Up Constructor Body (构造函数本体上移)

60push down Method (函数下移)

61push down field (字段下移)

62Extract Subclass (提炼子类)

63Extract Superclass (提炼超类)

64Extract Interface (提炼接口)

65Collapse Hierarch (折叠继承体系)

66Form Template Method (塑造模板函数)

67Replace Inheritance with Delegation (以委托取代继承)

68Replace Delegation with Inheritance (以继承取代委托)

 

posted @ 2010-08-02 09:02 matchcolor 阅读(...) 评论(...) 编辑 收藏