# Getting Started

This repository is a small plain-Java codebase made up of simple service-style and data-holder classes. It looks intentionally lightweight: there is no visible framework layer, so the fastest way to understand it is to read the classes directly and note the naming and labeling patterns.

## What This Project Does

The code models a few business-oriented concepts such as orders, products, and labeled field maps. Several classes are also clearly example or test fixtures for Japanese labels, mixed annotation coverage, and source files with different naming conventions.

## Recommended Reading Order

If you are new here, read in this order:

1. [Repository overview](../overview.md) — a quick map of the project and its intent.
2. [Root module docs](../root.md) — confirms that the codebase is essentially a flat set of top-level examples.
3. The entry-point classes below, starting with the smallest service-style examples and then the label-heavy models.

A practical class-by-class reading order is:

1. [`OrderProcessor`](../../src/main/java/OrderProcessor.java) — simplest service-like example.
2. [`ProductService`](../../src/main/java/ProductService.java) — minimal getter-based class.
3. [`MixedLabelClass`](../../src/main/java/MixedLabelClass.java) — shows mixed label coverage.
4. [`PartialLabelEntity`](../../src/main/java/PartialLabelEntity.java) — another partial-label example.
5. [`EucJpClass`](../../src/main/java/EucJpClass.java) — compact Japanese-labeled fields.
6. [`LargeFieldMap`](../../src/main/java/LargeFieldMap.java) — larger business field map.
7. [`MultiPattern`](../../src/main/java/MultiPattern.java) — demonstrates inline add-block comments.
8. [`LargeBusinessLabelClass`](../../src/main/java/LargeBusinessLabelClass.java) — largest label-dense example.
9. [`A`](../../src/main/java/A.java) — minimal placeholder class.

## Key Entry Points

The repository does not expose any highly connected classes, so there is no deep dependency graph to learn first. Focus on the visible top-level classes:

- [`OrderProcessor`](../../src/main/java/OrderProcessor.java)
- [`ProductService`](../../src/main/java/ProductService.java)
- [`LargeBusinessLabelClass`](../../src/main/java/LargeBusinessLabelClass.java)
- [`LargeFieldMap`](../../src/main/java/LargeFieldMap.java)
- [`MixedLabelClass`](../../src/main/java/MixedLabelClass.java)
- [`PartialLabelEntity`](../../src/main/java/PartialLabelEntity.java)
- [`MultiPattern`](../../src/main/java/MultiPattern.java)
- [`EucJpClass`](../../src/main/java/EucJpClass.java)
- [`A`](../../src/main/java/A.java)

## Project Structure

The source tree is effectively flat:

- `src/main/java/` contains the Java classes.
- `.codewiki/` contains generated documentation for the repository.

There are no submodules or layered packages visible in the indexed files, so each class is best understood on its own rather than as part of a broader application architecture.

## Configuration

No framework configuration files are visible in the indexed repository snapshot. That usually means there is no Spring, Maven, Gradle, or similar runtime setup to learn before reading the code.

What to look for anyway:

- Build files such as `pom.xml` or `build.gradle` if they exist outside the current index.
- Any `.codewiki` files for generated documentation structure.
- Source comments and field labels, which are the main “configuration-like” signals in this codebase.

## Common Patterns

A few conventions show up repeatedly:

- **Simple POJOs:** Most classes are just fields plus a tiny bit of behavior.
- **Getter-only access:** Example: [`ProductService`](../../src/main/java/ProductService.java) exposes a getter without extra logic.
- **Label comments on fields:** Many classes annotate fields with Japanese comments or labels, such as [`LargeFieldMap`](../../src/main/java/LargeFieldMap.java) and [`LargeBusinessLabelClass`](../../src/main/java/LargeBusinessLabelClass.java).
- **Mixed coverage examples:** [`MixedLabelClass`](../../src/main/java/MixedLabelClass.java) and [`PartialLabelEntity`](../../src/main/java/PartialLabelEntity.java) show both labeled and unlabeled fields.
- **Inline change markers:** [`MultiPattern`](../../src/main/java/MultiPattern.java) includes add-start/add-end comments that look like patch markers.

## Where to Go Next

After you finish this guide, read the source files in the recommended order and keep these questions in mind:

- Which classes are actual runtime entry points versus just examples?
- Which fields matter for business meaning, and which are only there to demonstrate labeling patterns?
- Are there any hidden build or test files outside the currently indexed snapshot?