Adapter Pattern

• Make a Class Fit an Interface
• Simplify Complex Interfaces
• Translate Data Types & Method Names

Classes

class Fahrenheit:

    function getTempFahrenheit():
        return this.temp
    

interface Celsius:

    function getTempCelsius()
    

Object Adapter

class FahrenheitToCelsius implements Celsius:

    Fahrenheit fahrenheitTemp

    function getTempCelsius():
        return (fahrenheitTemp.getTempFahrenheit() - 32) * (5 / 9)
    

Class Adapter

class FahrenheitToCelsius inherits Fahrenheit implements Celsius:

    function getTempCelsius():
        return (parent.getTempFahrenheit() - 32) * (5 / 9)
    

Best Practices

• Typically Encapsulation Preferred
• Limit API to Desired Methods
• Hide Underlying Types