# Getting Started

This repository is a small Java codebase made up of a few simple classes. Most files are lightweight data holders with labeled fields, and a couple of classes expose tiny service-style methods. There is no obvious framework or layered application structure, so new contributors can get productive by reading the source files directly.

## What This Project Does

This project looks like a set of example or fixture classes used to demonstrate field naming, label/comment patterns, and basic method scaffolding. The behavior is intentionally minimal: for example, [`OrderProcessor`](../../src\main\java\OrderProcessor.java) returns the order ID it is given, and [`ProductService`](../../src\main\java\ProductService.java) returns an in-memory product ID string.

## Recommended Reading Order

1. **Start with the overview**: [` .codewiki/overview.md`](../overview.md) to understand the repository at a glance.
2. **Read the small behavior-bearing classes**: [`OrderProcessor`](../../src\main\java\OrderProcessor.java) and [`ProductService`](../../src\main\java\ProductService.java).
3. **Then scan the field-pattern examples**: [`MixedLabelClass`](../../src\main\java\MixedLabelClass.java), [`PartialLabelEntity`](../../src\main\java\PartialLabelEntity.java), [`EucJpClass`](../../src\main\java\EucJpClass.java), [`LargeFieldMap`](../../src\main\java\LargeFieldMap.java), [`MultiPattern`](../../src\main\java\MultiPattern.java), and [`LargeBusinessLabelClass`](../../src\main\java\LargeBusinessLabelClass.java).
4. **Finish with the placeholder baseline**: [`A`](../../src\main\java\A.java), which is effectively an empty class.

## Key Entry Points

There are no highly-connected classes in the index, so the best entry points are the classes that actually do something or represent the main examples in the repo:

- [`OrderProcessor`](../../src\main\java\OrderProcessor.java) — minimal order-handling scaffold.
- [`ProductService`](../../src\main\java\ProductService.java) — minimal product access scaffold.
- [`LargeBusinessLabelClass`](../../src\main\java\LargeBusinessLabelClass.java) — the largest field-heavy example.
- [`LargeFieldMap`](../../src\main\java\LargeFieldMap.java) — a compact mapping-style data holder.
- [`MixedLabelClass`](../../src\main\java\MixedLabelClass.java) and [`PartialLabelEntity`](../../src\main\java\PartialLabelEntity.java) — useful for understanding mixed documentation coverage.

## Project Structure

The repository is flat and centered on a single root module.

- `src/main/java/` — all Java source files in the repository.
- `.codewiki/overview.md` — high-level summary of the repository.
- `.codewiki/tree.json` — generated structure metadata for the codewiki.

At the moment, there are no deeper submodules, package trees, or obvious framework directories in the indexed sources.

## Configuration

No build tool or application configuration files were detected in the indexed files. That means there is nothing special to configure before reading the code beyond a normal Java editor setup.

If you are looking for configuration in a future expansion of the repo, check for:

- `pom.xml` or `build.gradle` for build and dependency settings
- `application.properties` or `application.yml` for runtime configuration
- `src/test/` for test setup and conventions

## Common Patterns

- **Plain Java classes**: Most files are simple classes with private `String` fields.
- **Minimal behavior**: Methods are tiny and often just return stored input or state.
- **Label-heavy comments**: Many fields include Japanese comments or labels, suggesting the code is used to preserve naming/documentation examples.
- **Mixed documentation coverage**: Some classes intentionally mix labeled and unlabeled fields, which is useful when comparing annotation consistency.
- **Flat organization**: There is little visible inheritance or layering, so understanding each class in isolation goes a long way.

## Where to Go Next

After this guide, read the overview page and then jump into the two small service classes. Once you understand those, the rest of the repository is mostly about recognizing the different field-label patterns used across the model-like classes.