# Root

## Overview

The root of this codebase appears to be a packaging and integration layer rather than a self-contained business module. The documented child areas show three separate namespaces that each anchor a different part of the runtime boundary:

- `com.fujitsu` for application-specific web integration
- `eo.web` for screen-oriented web presentation
- `javax.faces` for JSF container integration

Taken together, these namespaces suggest a layered web application where container wiring, request interception, screen execution, and view rendering are split across distinct package families. The root itself does not expose indexed source files or direct cross-module dependencies, so the most useful view is structural: this area organizes how the application enters the servlet container and how requests flow into web screens.

## Sub-module Guide

### `com.fujitsu`

The [`com.fujitsu`](./com/fujitsu.md) namespace appears to hold the application's outer web integration for the Futurity area. Its documented child package, `com.fujitsu.futurity`, is centered on container-facing behavior rather than core business logic.

Within that subtree, the responsibilities are split between lifecycle and request handling:

- `com.fujitsu.futurity.web.x33.listener` handles application startup and shutdown concerns.
- `com.fujitsu.futurity.web.x33.filter` handles per-request interception before control continues through the filter chain.

This relationship matters because it shows two different entry modes into the same application boundary. The listener prepares the application as a whole, while the filter shapes each incoming request.

### `eo.web`

The [`eo.web`](./eo/web.md) namespace appears to be the web presentation area for the Eo application. Its documented child, `webview`, contains a single screen module centered on `ACA001SF`.

That screen is split into two roles:

- `ACA001SFBean` carries renderable screen state.
- `ACA001SFLogic` provides the execution entry point for the screen.

These pieces relate through framework wiring and view resources rather than through direct business-layer dependencies. The bean supplies data for the view, while the logic class appears to drive the screen lifecycle and action handling.

### `javax.faces`

The [`javax.faces`](./javax/faces.md) namespace appears to act as the JSF-facing contract boundary. Its child package, `javax.faces.webapp`, contains `FacesServlet`, which is the servlet class the container can bind to through deployment configuration.

This is a classic integration role: the package exists so the deployment descriptor can point to a predictable JSF servlet type. The class itself is not documented as containing rich behavior; the important part is that it provides a stable entry point for JSF request handling.

### How the sub-modules relate

The three child areas are not documented as directly depending on one another, but they appear to occupy adjacent layers of the same web stack:

- `javax.faces` provides the JSF servlet boundary.
- `com.fujitsu` provides application-specific container hooks and request filtering.
- `eo.web` provides screen-level presentation modules that likely execute after the request has been accepted by the web framework.

In practice, this suggests a flow where the container loads JSF-related entry points, application filters shape requests, and screen modules render the final page.

## Key Patterns and Architecture

### Container-managed entry points

The clearest architectural pattern across these namespaces is reliance on the servlet container and deployment descriptors as orchestration mechanisms. Rather than centralizing startup and routing in custom code, the system appears to expose standard entry points:

- a servlet class under `javax.faces.webapp`
- a listener and filter under `com.fujitsu.futurity`
- screen logic and bean objects under `eo.web.webview`

This makes the web runtime highly declarative and compatible with conventional Java EE-style deployment.

### Separation of concerns by lifecycle phase

The documented modules divide responsibilities by when they act:

- **Container/bootstrap phase** — `X33AppContextListener`
- **Request interception phase** — `X33JVRequestEncodingSjisFilter`
- **Screen execution phase** — `ACA001SFLogic`
- **View rendering phase** — `ACA001SFBean` and `FULL_ACA001010PJP.jsp`

That separation helps keep startup, request processing, and presentation from collapsing into one layer.

### Configuration-driven integration

The available documentation repeatedly points to XML and JSP resources as binding points. That suggests the code relies on framework configuration to connect classes to runtime behavior.

This appears to be intentional: the package structure provides stable anchors, while external descriptors decide how those anchors are activated.

## Dependencies and Integration

### External dependencies

The documented namespaces point primarily to standard Java web infrastructure:

- servlet container concepts such as listeners, filters, and servlets
- JSF package conventions under `javax.faces`
- XML deployment descriptors
- JSP view rendering

No resolved package dependencies were captured for the root module itself, so the integration picture is inferred from the child documentation rather than from import analysis.

### System integration points

The most visible integration artifacts are:

- [`web-full.xml`](./eo/web/webview/WEBGAMEN_FULL_ACA001.xml) for screen wiring
- [`FULL_ACA001010PJP.jsp`](./eo/web/webview/FULL_ACA001010PJP.jsp) for JSP rendering
- `web-full.xml` references to JSF servlet classes in `javax.faces.webapp`
- deployment wiring for the Futurity listener and filter in `com.fujitsu.futurity`

Together, these imply that the application is assembled from configuration plus small, framework-aligned code units.

### Relationship to the rest of the system

Because no direct source files, package dependencies, or cross-module links were indexed for the root module, the safest conclusion is that the root serves as a namespace umbrella for separate integration concerns. The code here appears to connect the application to the servlet runtime, but it does not itself define the domain model or service layer.

## Notes for Developers

- Treat the root as a structural map of web integration boundaries, not as a business-logic package.
- Changes in one namespace may affect container wiring even when the Java code looks small.
- Review XML deployment descriptors alongside code changes, since much of the behavior appears to be configuration-driven.
- Keep lifecycle, request filtering, and screen rendering separate when adding new functionality.
- The documentation strongly suggests a framework-oriented architecture, but some details are inferred from naming and structure, so implementation specifics should be verified in source before making behavioral changes.

## System Relationship Diagram

```mermaid
flowchart TD
Root["Root"] --> Com["com.fujitsu"]
Root --> Eo["eo.web"]
Root --> Javax["javax.faces"]
Com --> Futurity["com.fujitsu.futurity"]
Futurity --> Listener["X33AppContextListener"]
Futurity --> Filter["X33JVRequestEncodingSjisFilter"]
Eo --> Webview["webview"]
Webview --> Bean["ACA001SFBean"]
Webview --> Logic["ACA001SFLogic"]
Javax --> Webapp["javax.faces.webapp"]
Webapp --> FacesServlet["FacesServlet"]
Filter --> Chain["FilterChain"]
Logic --> Jsp["FULL_ACA001010PJP.jsp"]
Bean --> Jsp
Logic --> Xml["WEBGAMEN_FULL_ACA001.xml"]
Bean --> Xml
```