Adapter Design Pattern In Java Api

The name says it all.

Adapter design pattern in java api. Two different systems have completely different interfaces to communicate with outside. Adapter design pattern. The adapter pattern deals with how the classes are composed to form larger. It defines the application specific interface that client uses directly.

An adapter helps two incompatible interfaces to work together. I will also highlight the differences between the decorator design pattern see my previous article decorator design pattern in java here and the adapter design pattern. Adapter design pattern is used when you want two different classes with incompatible interfaces to work together. Example of adapter pattern.

Now we need to use the same app for our client in the uk that wants the same results but in kilometers per hour km h. Java util arrays aslist java util collections list java util collections enumeration java io inputstreamreader inputstream returns a reader. This is the desired interface class which will be used by the clients. Interfaces may be incompatible but the inner functionality should suit the need.

The classes and or objects participating in this pattern are listed as below. Structural patterns adapter recognizeable by creational methods taking an instance of different abstract interface type and returning an implementation of own another abstract interface type which decorates overrides the given instance. Uml for adapter pattern. This is the real world definition for an adapter.

The main intention of the adapter pattern is to make two incompatible interfaces compatible so that two different systems can inter communicate. Use the pattern when you want to reuse several existing subclasses that lack some common functionality that can t be added to the superclass. Adapter class makes classes with incompatible interfaces work together adapter design pattern is a structural design pattern among the gang of four gof article on gof patterns their types design patterns. Adapter pattern example consider a scenario in which there is an app that s developed in the us which returns the top speed of luxury cars in miles per hour mph.

In software engineering the adapter pattern is a software design pattern that allows the interface of an existing class to be used as another interface. Now when we have a good understanding of what s an adapter looks like let s identify the actors used into adapter design pattern. Let s understand the example of adapter design pattern by the above uml diagram. The underlying classes or objects will not change but there is.

Participants of adapter design pattern. Adapter pattern lets you wrap an otherwise incompatible object in an adapter to make it compatible with another class. The adapter pattern lets you create a middle layer class that serves as a translator between your code and a legacy class a 3rd party class or any other class with a weird interface.