# Repository Overview

Welcome! If you've just opened this repository, you're looking at the **Futurity X33** — a Java EE web application stack built around JavaServer Faces (JSF) and the Servlet API. The codebase currently provides the scaffolding for a web front end: a character-encoding filter for Shift-JIS input, a JSF FacesServlet wiring, and an MVC-style webview component (ACA001SF) that follows a bean-logic-JSP pattern. Most classes are thin placeholders or scaffolding, suggesting this repository is either in early development, serves as a test fixture, or acts as a structural template that future developers will fill in. Think of it as the skeleton of a web application — the bones are here; the muscle still needs to be built.

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## Overview

This repository contains the core web infrastructure for the **Fujitsu Futurity** application, specifically the **X33** branch/module. It is a Java EE web application that uses:

- **Servlet 2.x / Java EE** APIs for request handling (filters, servlets, context listeners).
- **JavaServer Faces (JSF)** via `FacesServlet` as the primary request dispatcher.
- A **Struts-style MVC pattern** in the `eo.web.webview` package, where XML config wires a bean and a logic class to a JSP view.
- **Shift-JIS (SJIS) encoding support** via a dedicated filter, reflecting the Japanese locale context of the Fujitsu JV platform.

The codebase is minimal and currently consists of stub classes — empty implementations waiting for real business logic. If you're here to understand how requests flow through the system or to extend an existing feature, this page gives you the map; the module pages below give you the details.

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## Technology Stack

| Category | Technology |
|---|---|
| **Language** | Java (Java EE / Jakarta EE Servlet API) |
| **Web Framework** | JavaServer Faces (JSF) 2.x |
| **Filter API** | `javax.servlet.Filter` |
| **Listener API** | `javax.servlet.ServletContextListener` |
| **View Technology** | JSP (JavaServer Pages) |
| **Deployment Descriptor** | `web-full.xml` (standard `web-app`) |
| **Character Encoding** | Shift-JIS (SJIS) via `X33JVRequestEncodingSjisFilter` |

No well-known third-party frameworks (Spring, Guice, etc.) were detected in the current source. The architecture is built around plain Java EE components.

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## Architecture

The following diagram shows how the main modules relate to each other at a high level:

```mermaid
flowchart TD
    WEB["web-full.xml<br/>Deployment Descriptor"] --> FLOW["Request Processing Flow"]
    FLOW --> FILTER["X33JVRequestEncodingSjisFilter<br/>Encoding Filter (stub)"]
    FLOW --> SERVLET["FacesServlet<br/>JSF Dispatcher (stub)"]
    FILTER --> WEBVIEW["EO Webview MVC"]
    SERVLET --> WEBVIEW
    WEBVIEW --> BEAN["ACA001SFBean<br/>View Data Carrier"]
    WEBVIEW --> LOGIC["ACA001SFLogic<br/>Action Logic (stub)"]
    WEBVIEW --> LISTENER["X33AppContextListener<br/>Context Listener (stub)"]
    style WEB fill:#e1f5fe
    style FLOW fill:#fff3e0
    style FILTER fill:#fce4ec
    style SERVLET fill:#fce4ec
    style WEBVIEW fill:#e8f5e9
    style BEAN fill:#f3e5f5
    style LOGIC fill:#f3e5f5
    style LISTENER fill:#f3e5f5
```

**How it works at a glance:**

1. The **deployment descriptor** (`web-full.xml`) declares the filter and servlet that handle incoming requests.
2. An incoming request passes through the **encoding filter**, which (currently as a no-op) forwards it to the **JSF FacesServlet**.
3. The FacesServlet dispatches to a **webview MVC component** (bean + logic + JSP).
4. At application startup, the **context listener** is the designated place for initialization logic (currently empty).

All of these components are currently stubs. The actual wiring, business logic, and view rendering still need to be implemented.

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## Module Guide

### com.fujitsu.futurity.web.x33.filter — Encoding Filter

This module provides the servlet filter `X33JVRequestEncodingSjisFilter`. The class implements `javax.servlet.Filter` and is registered in `web-full.xml` under the name `SjisFilter`. Its name suggests an original intent: to set the incoming request character encoding to Shift-JIS (SJIS) before downstream components process the request body. As implemented today, the `doFilter()` method simply passes the request and response straight through the filter chain without modification — making it effectively a no-op placeholder.

**Key class:** `X33JVRequestEncodingSjisFilter` — the sole class in this package, with standard `doFilter()`, `init()`, and `destroy()` lifecycle methods, all of which are currently no-ops.

**Where to look:** `.codewiki/com/fujitsu/futurity/web/x33/filter.md` for full details.

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### com.fujitsu.futurity.web.x33.listener — Application Context Listener

This package holds `X33AppContextListener`, a scaffold class intended to serve as a `ServletContextListener`. In a typical Java EE web application, this listener would receive `contextInitialized` and `contextDestroyed` callbacks from the servlet container, enabling startup tasks such as loading configuration, initializing connection pools, or bootstrapping shared services. Today, the class is an empty public shell with no fields, methods, or interfaces — a structural placeholder awaiting implementation.

**Key class:** `X33AppContextListener` — currently an empty class.

**Where to look:** `.codewiki/com/fujitsu/futurity/web/x33/listener.md` for full details.

---

### eo.web.webview.ACA001SF — Webview MVC Component

This is the most concrete MVC module in the codebase. It follows a bean-logic-JSP pattern common to Struts-style frameworks:

- **`ACA001SFBean`** — A simple JavaBean with a single `String value` property and a `getValue()` getter. This is the data carrier that the JSP view reads via Expression Language (e.g., `${value}`).
- **`ACA001SFLogic`** — The action/logic class with an `execute()` method that is currently an empty stub. In a real implementation, this would populate the bean, invoke services, and return a navigation result.
- The module is wired by an XML configuration file and consumed by a JSP view (`FULL_ACA001010PJP.jsp`).

The `ACA001SF` naming convention likely maps to a specific screen or functional area (where `ACA` denotes a domain, `001` a sequence number, and `SF` a screen type).

**Key classes:** `ACA001SFBean`, `ACA001SFLogic`

**Where to look:** `.codewiki/eo/web/webview/ACA001SF.md` for full details.

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### javax.faces.webapp — JSF FacesServlet

This module contains the `FacesServlet`, the central dispatcher for JavaServer Faces requests. It acts as the bridge between the HTTP servlet container and the JSF request lifecycle (Restore View → Apply Request Values → Process Validations → Update Model → Invoke Application → Render Response). In `web-full.xml`, the servlet is declared by name, making it the entry point for all JSF-related requests (typically `.xhtml` or `.jsf` URLs).

The source file here contains an empty class declaration, indicating that this is a stub — the actual `FacesServlet` implementation is normally provided by a JSF runtime library (such as Eclipse Mojarra or Apache MyFaces) on the classpath.

**Key class:** `FacesServlet` — stub declaration; real implementation lives in the JSF runtime.

**Where to look:** `.codewiki/javax/faces/webapp.md` for full details.

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## Getting Started

If you're a new developer exploring this codebase, here's the recommended reading order:

1. **`web-full.xml`** — Start here. This deployment descriptor (`full-fixture-codebase/koptWebA/WebContent/WEB-INF/web-full.xml`) declares the filter and servlet that form the entry points of the application. It's a concise 11-line file that sets the stage for everything else.

2. **`X33JVRequestEncodingSjisFilter`** — Read the filter source to understand the request processing pipeline. Even though it's currently a pass-through stub, it's the first component an incoming request encounters.

3. **`FacesServlet`** — Understand the JSF dispatcher. While the implementation comes from the JSF runtime, the stub here shows how the application declares and wires it.

4. **`ACA001SFBean` and `ACA001SFLogic`** — Explore the MVC component to see the bean-logic-view pattern that the application uses for its web pages. This is the most "application-logic-like" code currently in the repository.

5. **`X33AppContextListener`** — Check the listener to understand where application initialization logic should go.

6. **Module detail pages** — Once you have the big picture, dive into the individual module pages listed above for in-depth descriptions of each class, its dependencies, and developer notes.

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*This overview was auto-generated from the codebase analysis. For the most current information, refer to the module-specific documentation pages.*