You can create a FacebookAdapter, LinkedInAdapter, etc. After a two or three well-earned beers, once you make the choice of the particular social media that you’d like to use, you can create an adapter between your SocialIntegrator interface and the social media that you’ve chosen.
#SOFTWARE WRAPPER CODE#
Now that you’ve defined the interface that the rest of your code will interact with, you can start developing against the interface without worrying about its actual implementation. The interface is agnostic of whatever social network is being used under the hood. Notice how the actual social network is not mentioned. In this scenario, you’d make an ISocialIntegrator interface, defined as following in C#: interface ISocialIntegrator Quite frankly, you don’t care as long as you can get the info that you need.
#SOFTWARE WRAPPER FULL#
What if you know that you need some particulars from social media - a user’s email, a full name, perhaps a profile picture or a personal description? You don’t know what particular social media that you’d like to integrate with. I have a Facebook wrapper that I used for a Swift app on my Github profile. Rather than talk to Facebook’s SDK which exposes many different use cases, you create a class that talks to the SDK for you, and only exposes what you need. It facilitates your connection to Facebook. A FacebookConnector class would be a wrapper around Facebook. Imagine a new feature of your app needs to integrate with social media to get some basic user info. You need an adapter to map the 2-prong plug’s interface to what is expected by the 3-prong socket’s interface. Your 2-prong plug isn’t compatible with the 3-prong wall socket, however. It has all of the functionality with none of the danger. The live wires have all of the functionality you need, but the wrapper - the plug - simplifies things. That plug adapter is akin to the adapter pattern, whereas the actual plug is a wrapper around the live wires inside. Imagine inserting a 2-prong plug into a 3-prong wall socket by using an adapter. Problem space: An adapter solves a problem of incompatibility, while a wrapper fulfills the need of a simplified and specific programming interface. An adapter transforms input to make it match the input required by another interface. An adapter doesn’t necessarily contain or simplify an object, although this can be a secondary benefit of using adapters. It has the the sole responsibility of moving data to and from the wrapped object.
You may look at an interface, internal or external, that your existing code needs to conform to, and write an adapter to do that.Ĭomposition: A wrapper contains another object and wraps around it. You may look at a new library that you wish to use and write a wrapper to simplify and streamline its use. An adapter is intended to bridge the disconnect between one interface and another. A wrapper as used in the Facade pattern is intended to simplify an interface to an external library. Intention: The end product may look similar but the intention is different. When you are only concerned about a subset of the features or the exposed interface, or you find that using the library is hard or tedious, then what you need is to wrap it in a simpler, more constrained interface. Third-party code can be hard to use due to the fact that the exposed interface is made to accommodate many use cases. The most common use of a wrapper is in the Facade pattern. Wrapper: A wrapper encapsulates and hides the complexity of other code. It is a bridge between two existing interfaces. An adapter accomplishes this by transforming the input meant for Interface A into compatible input for Interface B. DefinitionĪdapter: An adapter allows code that has been designed for compatibility with one interface to be compatible with another. The adapter pattern and wrappers are two very useful tools and you can benefit from having them properly labeled in your toolbox. Both terms seem to be used interchangeably when in fact there are a few key differences. Their common usage and similarities in implementation, however, can lead to confusion. The adapter pattern and wrappers each solve common but distinct problems. The Difference Between An Adapter And A Wrapper
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