![]() The implementation class returns a new string by replacing the periods with newline characters.Īs an enhancement, the application now needs to support CSV formatting so that the text can be read and edited in spreadsheet software. A client provides a string to format with a call to the formatText(String text) method declared in the interface. To understand how the adapter pattern works, consider an existing text formatting application comprising of a TextFormattable interface and a NewLineFormatter implementation class. This pattern is typically used when an incompatible module needs to be integrated with an existing module without making any source code modifications. The adapter pattern is one of the classic Gang of Four structural patterns – A set of patterns whose objective is to identify how to realize relationships between classes and objects in a simple way. Similarly, by using the adapter pattern in the programming world, you can make incompatible interfaces work together. What the adapter does is makes the socket that produces 120 V (or 220 V for European standard) and the mobile device that requires 4 V work together. ![]() ![]() The moment you plug in your mobile handset or your laptop to a socket for charging, an adapter is at work. Adapter lets classes work together that couldn’t otherwise because of incompatible interfaces.”ĭesign Patterns: Elements of Reusable Object-Oriented Software Adapter Pattern: Introduction “ Convert the interface of a class into another interface clients expect.
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