# Com / Example

## Overview

The `com.example` package serves as the root namespace for a small collection of example and regression-test code. It does not contain production application logic — instead, it provides a controlled namespace where test fixtures, stub classes, and JSP view files are organized for use by build-time verification and regression testing. The package is intentionally minimal: source files are sparse, and most code within it is designed to be as simple as possible while still exercising specific tooling behaviors (such as JSP import resolution or attribute ordering).

This package has no child subpackages beyond what is documented below, no class-level symbols captured by the index, and no package-level dependency relationships beyond what the individual child modules establish.

## Sub-module Guide

### [bugca002](com/example/bugca002.md)

The `com.example.bugca002` module is a regression-test fixture tied to the BugCa002 scenario. It contains a single stub class, `KnownClass`, whose only purpose is to serve as a resolvable import target for other components — most notably a JSP view file (`BugCa002Language Before Import.jsp`). The class is intentionally empty: it declares no fields, relies on the compiler-provided default constructor, and its sole method (`execute()`) is a no-op.

The module's existence is architectural rather than functional. It exists so that JSP compilation and classpath resolution mechanisms have a known, stable symbol to import and reference without triggering build errors. This suggests the associated test case exercises JSP import resolution or attribute ordering behavior in the build tool, rather than validating any Java-level logic.

### Module relationships

The `com.example` namespace is flat — `bugca002` is its only documented child module, and it operates in isolation. There are no cross-module Java dependencies or shared interfaces. The only integration point is the inbound reference from a JSP view (outside the Java module tree) that imports `KnownClass` to verify JSP import handling.

```mermaid
flowchart TD
    PKG["com.example (package)"] --> SUB["bugca002 (sub-module)"]
    SUB --> JSP["JSP view imports"]
    SUB --> KC["KnownClass stub"]
    KC --> EX["execute() no-op method"]
    JSP -.->|references| KC
```

## Key Patterns and Architecture

The `com.example` package follows a **stub-and-reference** pattern. Rather than implementing application behavior, each module provides a minimal, intentionally inert type that other parts of the codebase (typically JSP views or test harnesses) can import. This is a common pattern in regression test suites where the goal is to exercise a build tool or compiler — the code under test is the tool itself, not the application logic.

Key architectural observations:

- **Minimal stubs**: Classes in this package are deliberately sparse. `KnownClass` is the exemplar — empty fields, default constructor, no-op method. The intent is stability, not functionality.
- **JSP-driven test entry points**: The primary consumer of these stubs appears to be JSP view files, which import the classes to test JSP compilation pipelines. This suggests the test harness validates the JSP compiler's ability to resolve class imports and handle attribute ordering.
- **No inter-module communication**: Since there are no child subpackages beyond `bugca002`, and `bugca002` has no dependencies, there are no data flows or service calls between modules. Each stub operates in complete isolation.

## Dependencies and Integration

### Internal dependencies
None. No child modules depend on each other.

### External integration

| Direction | Target | Description |
|-----------|--------|-------------|
| **Used by** | `BugCa002Language Before Import.jsp` | JSP view imports `KnownClass` to exercise JSP import resolution |
| **Consumes** | `java.lang` | Default Java runtime package (implicit import for `KnownClass`) |

### Build-level integration

The `bug-ca-002-attr-order` source directory suggests this module is consumed by a build tool or test harness that exercises JSP attribute ordering or import resolution. The module would be compiled as part of a broader test suite, though the index does not capture the specific test runner or integration point.

## Notes for Developers

- **These are fixtures, not production code**: Classes in `com.example` are stubs by design. Do not assume missing fields, methods, or logic are oversights — they are intentional. If you need a non-trivial class for testing, create it in a new module rather than modifying an existing stub.
- **Check the test harness for context**: The `bugca002` naming convention and the `bug-ca-002-attr-order` directory strongly suggest this is tied to a specific regression test. If you are investigating why this code exists, look for the associated test definition in the test harness or issue tracker.
- **Package visibility matters**: Classes like `KnownClass` are declared `public` because they must be importable from JSP views in different packages. If a stub only needs to be accessible within its own package, package-private visibility would be sufficient and more restrictive.
- **No child subpackages**: This package does not contain further nested subpackages beyond what is documented here. The scope of `com.example` is limited to the root-level and child modules listed above.