# Business Logic — FUW00927SFChecker.checkMethod() [8 LOC]

| Field | Value |
|-------|-------|
| Fully Qualified Name | `eo.web.webview.FUW00927SF.FUW00927SFChecker` |
| Layer | Controller (Package: `eo.web.webview`, implements the X31 GUI check framework's `X31SGuiCheckBase` interface) |
| Module | `FUW00927SF` (Package: `eo.web.webview.FUW00927SF`) |

## 1. Role

### FUW00927SFChecker.checkMethod()

This method serves as the **check processing dispatch point** (チェック処理部：チェック処理の振分け — "Check processing section: check processing dispatch") for the `FUW00927SF` web view module, conforming to the X31 framework's `X31SGuiCheckBase` contract. It acts as an entry gateway for GUI validation: the framework invokes `checkMethod()` with a parameter object containing the check input and framework instruction metadata, and the method signals whether the validation passed or failed via its boolean return value.

When `true` is returned and `errMsgStock` is unused, the framework proceeds with default message-display processing as defined in the check definition file (チェック定義書). When `errMsgStock` is supplied, the method assumes sole responsibility for emitting error messages — bypassing the standard check-definition-driven message flow.

The method currently operates as a **pass-through stub**: it extracts the `patternID` from the parameter (to support multi-result pattern dispatch as documented in the Javadoc) and immediately returns `true`, indicating check success. For multi-result pattern scenarios, the framework contract requires callers to set the result pattern ID via `param.setResultPatternID()` before returning.

## 2. Processing Pattern (Detailed Business Logic)

```mermaid
flowchart TD
    START(["checkMethod(params)"])
    COND_1["patternID exists in param"]
    READ_ID["patternID = param.patternID"]
    RETURN_TRUE(["return true"])
    END_CHECK(["Check passed — framework continues"])

    START --> COND_1
    COND_1 --> READ_ID
    READ_ID --> RETURN_TRUE
    RETURN_TRUE --> END_CHECK
```

**Processing narrative:**

1. **Entry** (L55–56): The framework calls `checkMethod` with the GUI check parameter object and an optional error message stock buffer.
2. **Pattern ID extraction** (L58): Reads `param.patternID` into a local variable. This supports the multi-result pattern dispatch mechanism described in the Javadoc — when multiple validation result patterns exist, the `patternID` identifies which pattern is currently being evaluated. The constant `patternID` is a field of `X31SGuiCheckParam` that maps to a pattern identifier string used to branch validation logic.
3. **Success return** (L60): Returns `true`, signaling to the framework that the check completed normally. The framework then proceeds with its default post-check behavior (message display per the check definition file, or using any messages placed in `errMsgStock`).

## 3. Parameter Analysis

| No | Parameter Name | Type | Business Description |
|----|---------------|------|---------------------|
| 1 | `param` | `X31SGuiCheckParam` | **in/out** — Carries the check processing input arguments and framework instruction metadata. Contains `patternID` (result pattern identifier) and may be mutated by the method via `setResultPatternID()` to convey which validation result pattern was selected. Used by the framework to pass validation context and receive processing directives. |
| 2 | `errMsgStock` | `X31GUtilStockMessage` | **out** — Not normally used; reserved for scenarios where special warning or error messages must be emitted at runtime. When utilized, the method bypasses standard check-definition-driven message processing and assumes sole responsibility for error message display. |

**Instance fields read by this method:**
- `bl` (`X31BBusinessLogic`) — Business logic delegate injected via constructor (from `FUW00927SFLogic` class). **Not accessed** in the current stub implementation.

## 4. CRUD Operations / Called Services

This method does **not** invoke any called services, CBS methods, or SC (Service Component) methods. It is a pure stub that reads a single field from the parameter object and returns a boolean.

| CRUD | SC / CBS | SC Code | Entity / DB | Operation Description |
|------|----------|---------|-------------|----------------------|
| — | — | — | — | No database or service calls. This is a controller-level check dispatch stub. |

## 5. Dependency Trace

No callers to this method were found in the codebase. This method implements the `X31SGuiCheckBase` interface, meaning it is **framework-invoked** — the X31 framework's GUI check engine calls `checkMethod()` when processing the validation definition associated with the `FUW00927SF` screen/module. It is not called from any other application code directly.

| # | Caller (Screen/Batch) | Call Chain (Full Path to this Method) | Terminal (SC / CRUD / Entity) |
|---|----------------------|--------------------------------------|-------------------------------|
| 1 | X31 Framework (GUI Check Engine) | Framework `X31SGuiCheckBase.execute()` -> `FUW00927SFChecker.checkMethod` | None (stub — no terminal calls) |

## 6. Per-Branch Detail Blocks

**Block 1** — [LOCAL VARIABLE DECLARATION] `(patternID extraction from param)` (L58)

Extracts the result pattern identifier from the parameter object. This field supports the multi-result pattern dispatch mechanism: when the check definition specifies multiple validation result patterns, each pattern is identified by a unique `patternID` string.

| # | Type | Code |
|---|------|------|
| 1 | SET | `String patternID = param.patternID;` // Extracts the result pattern ID from the GUI check parameter object. The patternID field identifies which validation result pattern is currently being evaluated in a multi-pattern scenario. |

**Block 2** — [RETURN] `(check success)` (L60)

Returns `true` to the framework, indicating the check completed successfully. The framework then proceeds with its default post-check message display processing (per the check definition file) or uses any messages placed in `errMsgStock` if the error stock was supplied.

| # | Type | Code |
|---|------|------|
| 1 | RETURN | `return true;` // Check passed — framework continues with default message processing (CHECK_DEFINITION_MESSAGE_DISPLAY) |

## 7. Glossary

| Term | Type | Business Meaning |
|------|------|------------------|
| `patternID` | Field | Result Pattern ID — identifier for a specific validation result pattern in a multi-pattern check scenario. Used to distinguish between different possible outcomes of a single check operation. |
| `X31SGuiCheckParam` | Framework Class | GUI Check Parameter — in/out object passed to check methods by the X31 framework. Carries check input data, framework instructions, and result pattern metadata. |
| `X31GUtilStockMessage` | Framework Class | Error Message Stock — optional output buffer for custom error/warning messages. When populated, the check method assumes responsibility for message display, bypassing the standard check-definition-driven flow. |
| `X31SGuiCheckBase` | Framework Interface | GUI Check Base Interface — defines the contract that all check processing classes must implement. The framework invokes `checkMethod()` on any class implementing this interface during GUI validation. |
| `X31BBusinessLogic` | Framework Class | Business Logic Base — framework-level business logic delegate. Injected into checkers via constructor; provides access to the underlying business logic layer (e.g., `FUW00927SFLogic`). |
| `X31SException` | Framework Class | X31 Service Exception — checked exception type thrown by framework methods. Declared on `checkMethod()` signature. |
| FUW00927SF | Module ID | A webview module identifier (following the `FUW` prefix convention — likely "Frame Utility Web"). The number `00927` is the unique module sequence; the `SF` suffix may indicate a screen-specific or service-flow variant. |
| チェック処理部 | Japanese — 检查处理部分 | Check Processing Section — the entry point for GUI validation within a framework-managed check class. |
| チェック処理の振分け | Japanese — 检查处理的分发 | Check Processing Dispatch — the mechanism by which a check method routes processing to the appropriate validation handler based on context (e.g., pattern ID, input state). |
| チェック定義書 | Japanese — 检查定义文件 | Check Definition File — external configuration that specifies how messages are displayed and what processing occurs after a check passes or fails. |
| 結果パターンID | Japanese — 结果模式ID | Result Pattern ID — identifier for a specific validation outcome pattern, used when a single check method must handle multiple result scenarios. |
| メッセージ表示 | Japanese — 消息显示 | Message Display — the framework's standard post-check behavior of presenting validation results (pass/fail messages) to the user. |