Summary
This chapter covered the Adapter design pattern. We use the Adapter pattern for making two (or more) incompatible interfaces compatible. As a motivation, an e-commerce system that should support multiple currencies was mentioned. We use adapters every day for interconnecting devices, charging them, and so on.
Adapter makes things work after they have been implemented. The Grok Python framework and the Traits package use the Adapter pattern for achieving API conformance and interface compatibility, respectively. The open/close principle is strongly connected with these aspects.
In the implementation section, we saw how to achieve interface conformance using the Adapter pattern without modifying the source code of the incompatible model. This ...
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