Adapter Design Pattern - How it helps to integrate different interfaces | Adapter pattern in java

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Adapter design pattern is a structural design pattern and helps in integrating two modules with different incompatible interfaces.

Most important task of an Adapter is to transfer data between applications or modules.
Very common task is to parse the information from one kind to the other
Convert from one type to the other
Some times adapters even validate the data so that right data flows into the application from external applications.
Having adapters help in keeping the conversion code separate so that the parsing functionality is not leaking into the core modules of our application.

Another important advantage of having an adapter is that when there is a change in outside interface, our core modules does not get affected. Only adapters need to be modified. So, this helps in restricting the changes to adapter module alone and rest of application does not get affected.

Another last point I would like to mention is that the adapter we have seen is just an object level, but as I said, adapters can get quite complex and I have seen adapters as large sized applications which convert one form of data to other format. So, these kind of large adapters are part of the architecture some times and play an important role.

Example Code:
https://github.com/java9s/adapter-pattern-example

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References:
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