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Refactoring Code with Nested Conditional Statements
Within Java system libraries designed for embedded devices, handling commands transmitted via radio broadcasts can lead to excessive use of if/else if statements. As the number of commands increases, this approach creates maintenance challenges and impairs code readability.
To address this issue, consider implementing the Command pattern. This design principle involves creating a Command interface outlining an exec() method. For each command, a specific class is created (e.g., CommandA) that implements the exec() method and encapsulates the command's logic.
Next, a Map
commandMap.get(value).exec();
This approach effectively decouples the command handling logic from the conditional check, making the code more reusable and easier to manage. Additionally, special commands (e.g., UnknownCommand or NullCommand) can be added to handle unknown commands, reducing the need for excessive client-side checks.
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