# Javax

## Overview

The `javax` package acts as a top-level namespace for Java-based framework integration points. In this codewiki fixture, the documented surface is extremely narrow and centers on the `javax.faces` area, which appears to provide the bridge between a web application and the JavaServer Faces runtime.

Because no source files, classes, or package dependencies were indexed directly for `javax`, this parent page should be read as a structural overview rather than a deep implementation guide. Its main role is to organize the Faces integration area and explain how the web tier enters the framework.

## Sub-module Guide

### `javax.faces`

[`javax.faces`](./javax/faces.md) is the only documented child area. It appears to be the JSF integration namespace, with the visible implementation surface concentrated in `javax.faces.webapp`.

The relationship is hierarchical and functional:

- `javax` is the broad namespace container.
- `javax.faces` narrows that scope to Faces integration.
- `javax.faces.webapp` is the web-facing entry point inside Faces.
- `FacesServlet` is the concrete bridge the container uses to hand off web requests into the Faces runtime.

In practice, that means the parent package does not add independent business behavior; it frames the integration surface where the servlet container, deployment descriptors, and JSF runtime meet.

## Key Patterns and Architecture

This area appears to follow a boundary-oriented, configuration-driven architecture:

- **Namespace layering** - `javax` groups framework integration concerns, while `javax.faces` specializes the namespace for Faces.
- **Servlet boundary** - `FacesServlet` is the operational seam between container-managed request handling and Faces processing.
- **Descriptor-based activation** - The runtime hook is enabled through deployment descriptors rather than local code wiring.
- **Thin parent module** - The evidence suggests the parent package is intentionally minimal and mostly serves as an organizing container.

The high-level flow is:

1. The application declares Faces integration in deployment configuration.
2. The servlet container resolves `FacesServlet` from `javax.faces.webapp`.
3. Requests mapped to that servlet enter the Faces runtime.
4. `javax.faces` provides the namespace context that keeps this integration organized.

```mermaid
flowchart TD
Javax["javax"] --> Faces["javax.faces"]
Faces --> Webapp["javax.faces.webapp"]
WebXml["web.xml"] --> FacesServlet["FacesServlet"]
WebFullXml["web-full.xml"] --> FacesServlet
Webapp --> FacesServlet
```

## Dependencies and Integration

The child documentation shows the most visible integration points are deployment descriptors:

- [`web.xml`](web.xml) uses `FacesServlet`
- [`web-full.xml`](web-full.xml) uses `FacesServlet`

That suggests `javax` connects to the rest of the system indirectly through servlet-container conventions and XML configuration. No package dependencies were resolved in the index, so there is no evidence here of deeper internal coupling within the `javax` namespace.

From a systems perspective, this makes `javax` look like an integration boundary rather than a dense dependency hub.

## Notes for Developers

- Use [`javax.faces`](./javax/faces.md) as the primary entry point for understanding the web integration story.
- Treat `FacesServlet` as the key runtime hook when tracing request flow from deployment config into JSF.
- Keep descriptor references synchronized with the servlet class and package path.
- Because the indexed source is minimal, some of this behavior appears to be inferred from framework conventions rather than local implementation details.
- When extending this area, preserve the narrow boundary role of the namespace; avoid assuming hidden internal services that are not visible in the documentation.