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Stirling-PDF/app/saas
Ludy a28a950aa4 feat: modernize codebase using Java switch expressions and List#getFirst/getLast APIs (#6334)
# Description of Changes

This PR introduces a broad modernization of the codebase by adopting
newer Java language features and improving code readability and
maintainability.

## What was changed

- Replaced traditional `switch` statements with modern switch
expressions (`case ->`) across multiple classes.
- Replaced usages of `List#get(0)` and `List#get(size - 1)` with
`getFirst()` and `getLast()` respectively.
- Simplified conditional logic using pattern matching (e.g.,
`instanceof` and switch pattern matching).
- Refactored various utility and controller classes to reduce
boilerplate and improve clarity.
- Removed unused or redundant code (e.g., `parseClientFileIds` method in
`MergeController`).
- Improved type safety (e.g., using `Class::isInstance` instead of
`instanceof` checks in streams).
- Cleaned up Spring annotations by removing unnecessary `@Autowired`
where constructor injection is already used.
- Added a new test (`UIDataControllerTest`) to ensure correct handling
of identical JSON configs with different filenames.
- Minor formatting and style fixes (e.g., Spotless formatting
adjustment).

## Why the change was made

- To align the codebase with modern Java standards (Java 17+ features).
- To improve readability and maintainability by reducing verbosity.
- To eliminate common indexing patterns that are more error-prone.
- To standardize coding style across the project.
- To improve test coverage for edge cases discovered during refactoring.

---

## Checklist

### General

- [ ] I have read the [Contribution
Guidelines](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/CONTRIBUTING.md)
- [ ] I have read the [Stirling-PDF Developer
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md)
(if applicable)
- [ ] I have read the [How to add new languages to
Stirling-PDF](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md)
(if applicable)
- [ ] I have performed a self-review of my own code
- [ ] My changes generate no new warnings

### Documentation

- [ ] I have updated relevant docs on [Stirling-PDF's doc
repo](https://github.com/Stirling-Tools/Stirling-Tools.github.io/blob/main/docs/)
(if functionality has heavily changed)
- [ ] I have read the section [Add New Translation
Tags](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/devGuide/HowToAddNewLanguage.md#add-new-translation-tags)
(for new translation tags only)

### Translations (if applicable)

- [ ] I ran
[`scripts/counter_translation.py`](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/docs/counter_translation.md)

### UI Changes (if applicable)

- [ ] Screenshots or videos demonstrating the UI changes are attached
(e.g., as comments or direct attachments in the PR)

### Testing (if applicable)

- [ ] I have run `task check` to verify linters, typechecks, and tests
pass
- [ ] I have tested my changes locally. Refer to the [Testing
Guide](https://github.com/Stirling-Tools/Stirling-PDF/blob/main/DeveloperGuide.md#7-testing)
for more details.

---------

Signed-off-by: Ludy87 <Ludy87@users.noreply.github.com>
2026-08-12 15:13:29 +00:00
..
2026-05-21 16:05:35 +01:00