fix-#1199/refactor-implementation-smells

[bishaddebroy]

Refactor Multiple Components for Improved Maintainability

Description

This PR addresses several implementation smells in the codebase to enhance maintainability, readability, and testability. The refactoring process ensures no functional changes are introduced, maintaining backward compatibility while improving code quality metrics.

Changes Made

1. Refactored Complex Method in ImportOrderer

• Extracted import scanning logic into smaller methods.
• Introduced a helper class to handle related data.
• Reduced cyclomatic complexity by breaking down responsibilities.
• Enhanced code readability and separation of concerns.

2. Eliminated Magic Numbers in CommandLineOptionsParser

• Introduced named constants to replace numeric literals.
• Added a default case to the switch statement.
• Improved error handling and messaging for edge cases.
• Increased code clarity and reduced ambiguity.

3. Simplified Long Statement in JavaCommentsHelper

• Decomposed the complex nested logic into multiple methods.
• Organized methods to reflect distinct responsibilities.
• Enhanced overall code organization and separation of concerns.

Benefits

• Improved Code Readability: Easier for developers to understand and work with the code.
• Better Maintenance: Simplified methods and structured logic improve maintainability.
• Enhanced Testability: Smaller, focused methods facilitate better unit test coverage.
• Clearer Responsibilities: Improved separation of concerns across components.

Testing

• Verified that all existing tests pass successfully.
• No behavior has been changed or compromised.
• Conducted manual testing to confirm no functional changes.

Impact

• No functional changes introduced.
• Backward compatibility maintained.
• Adheres to project coding standards and style guidelines.

Related Issues

• Closes Code Smells: Multiple Components Need Refactoring for Better Maintainability and Code Quality #1199

Labels

refactoring code-quality enhancement implementation-smells

[MrDolch]

For my taste, the methods are too fragmented. It’s hard to keep track of all the small subroutines in my head. Isn’t there a middle ground between being too small and too complex?

[MrDolch]

Who is supposed to read this JavaDoc comment? By default, JavaDoc for private methods is not published. You can only see it in the IDE by hovering over the method name and waiting, or by jumping to the method’s implementation. The method signature is already well chosen.
Even I don’t understand what the comment means. How am I supposed to choose between a parameter comment and a regular block comment?

[MrDolch]

The refactored code looks much better. However, I still get headaches when I see the parameter i.
I understand the approach with ImportAndIndex to make the side effects clearer.
At the moment, I also don't know how to improve it further.

[MrDolch]

Very good!