# Getting Started

## What This Project Does

This repository is a small Java codebase centered on a couple of simple service-style classes and a set of plain data-holder classes. The code appears to be more about demonstrating naming, labeling, and comment patterns than implementing a full application stack. There is no visible framework, controller, or persistence layer in the indexed files.

## Recommended Reading Order

If you are new to the codebase, read in this order:

1. [` .codewiki/overview.md`](../overview.md) — start with the repository summary to understand the overall shape.
2. [`OrderProcessor`](../../src/main/java/OrderProcessor.java) — the clearest behavior-oriented class.
3. [`ProductService`](../../src/main/java/ProductService.java) — the other service-like entry point.
4. [`LargeFieldMap`](../../src/main/java/LargeFieldMap.java) and [`MultiPattern`](../../src/main/java/MultiPattern.java) — representative field naming and comment patterns.
5. [`MixedLabelClass`](../../src/main/java/MixedLabelClass.java) and [`PartialLabelEntity`](../../src/main/java/PartialLabelEntity.java) — examples of mixed labeled and unlabeled fields.
6. [`EucJpClass`](../../src/main/java/EucJpClass.java) and [`LargeBusinessLabelClass`](../../src/main/java/LargeBusinessLabelClass.java) — larger examples with Japanese field comments.
7. [`A`](../../src/main/java/A.java) — a minimal placeholder class.

## Key Entry Points

The repository does not currently expose highly connected classes, so the best entry points are the small classes that contain behavior or define the main naming conventions:

- [`OrderProcessor`](../../src/main/java/OrderProcessor.java) — creates an order by returning the provided order ID.
- [`ProductService`](../../src/main/java/ProductService.java) — exposes a simple product accessor.
- [`LargeFieldMap`](../../src/main/java/LargeFieldMap.java) — shows the style used for business field names and labels.
- [`MultiPattern`](../../src/main/java/MultiPattern.java) — shows the add-start/add-end comment pattern around a subset of fields.
- [`MixedLabelClass`](../../src/main/java/MixedLabelClass.java) — demonstrates mixed comment coverage.
- [`PartialLabelEntity`](../../src/main/java/PartialLabelEntity.java) — another partial-label example.

## Project Structure

The source is organized as a very flat Java layout:

- [`src/main/java`](../../src/main/java) contains all Java source files.
- There is no obvious package hierarchy in the indexed files.
- The repository content splits into two broad groups:
  - **Service-like classes**: [`OrderProcessor`](../../src/main/java/OrderProcessor.java), [`ProductService`](../../src/main/java/ProductService.java)
  - **Model / example classes**: [`LargeBusinessLabelClass`](../../src/main/java/LargeBusinessLabelClass.java), [`LargeFieldMap`](../../src/main/java/LargeFieldMap.java), [`MixedLabelClass`](../../src/main/java/MixedLabelClass.java), [`MultiPattern`](../../src/main/java/MultiPattern.java), [`PartialLabelEntity`](../../src/main/java/PartialLabelEntity.java), [`EucJpClass`](../../src/main/java/EucJpClass.java), [`A`](../../src/main/java/A.java)

```mermaid
flowchart TD
Root["Source Tree"] --> Java["src/main/java"]
Java --> Services["OrderProcessor, ProductService"]
Java --> Models["Field and entity classes"]
Models --> LabelExamples["LargeFieldMap, MixedLabelClass, PartialLabelEntity"]
Models --> JapaneseExamples["EucJpClass, LargeBusinessLabelClass"]
Models --> PatternExample["MultiPattern"]
```

## Configuration

No configuration files were visible in the indexed repository tree. Based on the current source set, there is no sign of build configuration, dependency management, or runtime settings files in the scanned files.

If you need to understand how the project is built or run, look for the usual Java project files first, such as:

- `pom.xml` for Maven
- `build.gradle` or `build.gradle.kts` for Gradle
- `settings.gradle` or `settings.gradle.kts`

At the moment, the repository appears to be source-only, so the main “configuration” is the naming and labeling convention embedded in the Java classes themselves.

## Common Patterns

A few patterns repeat throughout the codebase:

- **Plain Java classes** with minimal logic and direct field access.
- **String fields initialized to empty strings** in many model-like classes.
- **Inline comments as labels** for fields, often in Japanese.
- **Simple method bodies** when behavior exists, such as `OrderProcessor#createOrder` returning the input value.
- **Partial annotation coverage** in classes like [`MixedLabelClass`](../../src/main/java/MixedLabelClass.java) and [`PartialLabelEntity`](../../src/main/java/PartialLabelEntity.java), which suggests these files are used to demonstrate different documentation or labeling states.
- **Marker comments** such as `ADD START` / `ADD END` in [`MultiPattern`](../../src/main/java/MultiPattern.java).

## Practical Next Step

If you are about to make a change, start by identifying whether it belongs in a behavior class or a field/example class:

- For behavior changes, begin with [`OrderProcessor`](../../src/main/java/OrderProcessor.java) and [`ProductService`](../../src/main/java/ProductService.java).
- For naming or labeling changes, inspect the model-like classes first, especially [`LargeFieldMap`](../../src/main/java/LargeFieldMap.java) and [`LargeBusinessLabelClass`](../../src/main/java/LargeBusinessLabelClass.java).

If you are unsure where to start, read [` .codewiki/overview.md`](../overview.md) first, then follow the order above.