# Getting Started

This repository is a small, flat Java codebase made up of simple domain-style classes and examples. It looks like a lightweight model or sample project rather than a full application stack: there is no obvious framework bootstrap, controller layer, or persistence layer. Most of the value is in the field naming, inline comments, and a few service-like classes.

## What This Project Does

The project appears to model a handful of business concepts such as orders, products, and labeled data records. `OrderProcessor` and `ProductService` provide the only clear behavior, while the remaining classes mainly hold fields and demonstrate naming or labeling patterns.

If you are new here, think of this codebase as a compact set of examples that show how the team structures simple Java domain objects and small service methods.

## Recommended Reading Order

1. **[Repository overview](../overview.md)** — start here for the high-level picture of the codebase.
2. **[`OrderProcessor`](../../src/main/java/OrderProcessor.java)** — read first among the source files; it shows the clearest business action.
3. **[`ProductService`](../../src/main/java/ProductService.java)** — next, to understand the service-style access pattern.
4. **[`LargeFieldMap`](../../src/main/java/LargeFieldMap.java)** and **[`MultiPattern`](../../src/main/java/MultiPattern.java)** — useful for spotting naming conventions and annotation-style comments.
5. **[`MixedLabelClass`](../../src/main/java/MixedLabelClass.java)** and **[`PartialLabelEntity`](../../src/main/java/PartialLabelEntity.java)** — good examples of mixed labeled and unlabeled fields.
6. **[`LargeBusinessLabelClass`](../../src/main/java/LargeBusinessLabelClass.java)** — read last if you want to see the full repeated label pattern.

## Key Entry Points

There are no highly connected classes in the generated index, so the main entry points are the small behavior-oriented classes:

- **[`OrderProcessor`](../../src/main/java/OrderProcessor.java)** — creates an order identifier and is the closest thing to a workflow entry point.
- **[`ProductService`](../../src/main/java/ProductService.java)** — exposes a product identifier through a simple getter.
- **[`LargeFieldMap`](../../src/main/java/LargeFieldMap.java)** — useful when you need to understand the project’s field naming style.
- **[`LargeBusinessLabelClass`](../../src/main/java/LargeBusinessLabelClass.java)** — shows the largest set of labeled fields in one place.

## Project Structure

The repository is organized as a flat set of top-level Java classes under `src/main/java/` rather than a deep package hierarchy.

- `src/main/java/OrderProcessor.java` — order-related behavior
- `src/main/java/ProductService.java` — product-related accessors
- `src/main/java/LargeFieldMap.java` — field mapping example
- `src/main/java/LargeBusinessLabelClass.java` — large labeled entity example
- `src/main/java/MixedLabelClass.java` — mixed labeling example
- `src/main/java/PartialLabelEntity.java` — partially labeled entity example
- `src/main/java/MultiPattern.java` — example with add-block markers in comments
- `src/main/java/EucJpClass.java` — small field set with Japanese labels
- `src/main/java/A.java` — placeholder class

## Configuration

No build files or framework configuration are visible in the generated index, so there does not appear to be application-level configuration to learn first. The main things to note are:

- **Source layout** — all classes live directly under `src/main/java/`.
- **Comments and labels** — many classes rely on inline comments for semantics, including Japanese labels and code-change markers.
- **No obvious runtime config** — there is no detected application entry file, properties file, or framework-specific setup in the available tree.

If new configuration files are added later, they will likely become important only after you understand the class patterns above.

## Common Patterns

A few conventions repeat throughout the codebase:

- **Plain data holders** — many classes only define private fields and no methods.
- **Simple accessor methods** — behavior is minimal and usually just returns an existing value.
- **Inline label comments** — Japanese comments often describe field meaning directly beside the field declaration.
- **Mixed labeling** — some classes intentionally combine labeled and unlabeled fields.
- **Comment markers for edits** — `MultiPattern` includes `ADD START` and `ADD END` markers, suggesting patch-friendly sections.
- **Package-less classes** — the code is kept at the top level, which keeps navigation simple but makes naming more important.

## Where to Start

If you only have 10 minutes, read these in order:

1. `OrderProcessor`
2. `ProductService`
3. `LargeFieldMap`
4. `MixedLabelClass`
5. `LargeBusinessLabelClass`

That sequence gives you the behavioral classes first, then the field-pattern examples that make up most of the repository.