Refactoring Strategies

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Presentation transcript:

Refactoring Strategies Josh Schenk

Types Form Template Method Decompose Conditional Push Down Field

Form Template Method Situation: When two subclasses contain similar functionality Solution: Merge the functionality into the superclass

Decompose Conditional Situation: Conditional clauses are bulky and difficult to interpret Solution: Decompose the functionality into multiple components

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

Push Down Field Situation: Field in superclass is only used by some subclasses Solution: Move field to those subclasses