리팩토링 : Decompose Conditional

조건 :

복잡한 (if - then -else) 조건문을 가지고 있다면

적용 :

조건부분, then부분, else부분을 메소드로 뽑아내라.

적용전

if (date.before (SUMMER_START) || date.after(SUMMER_END))
    charge = quantity * _winterRate + _winterServiceCharge;
else charge = quantity * _summerRate;

적용후

if (notSummer(date))
    charge = winterCharge(quantity);
else charge = summerCharge (quantity);

참조 :

http://www.refactoring.com/catalog/decomposeConditional.html