# Business Logic — FUW00156SF01DBean.listKoumokuIds() [5 LOC]

| Field | Value |
|-------|-------|
| Fully Qualified Name | `eo.web.webview.FUW00156SF.FUW00156SF01DBean` |
| Layer | Web View (Controller/View Bean) |
| Module | `FUW00156SF` (Package: `eo.web.webview.FUW00156SF`) |

## 1. Role

### FUW00156SF01DBean.listKoumokuIds()

This method is a static factory that builds a metadata field-list for a data-type bean used by the X33V web framework (Fujitsu Futurity). The X33V framework relies on `X33VListedBeanInterface` implementations to drive form rendering: the list of field names (koumokuIds = "item names") is consumed by the framework's view engine to know which UI columns or fields to render in a listed/detail data-type view screen. Specifically, `listKoumokuIds()` declares that this bean's data-type view has exactly one field: `"アンケート番号"` (Questionnaire Number, with long vowel mark). The method implements the framework's `listKoumokuIds` contract — a no-argument static accessor that returns an `ArrayList<String>` of field name strings. It plays the role of a shared utility bean method within the FUW00156SF module, supporting a questionnaire-number-related screen by providing the structural metadata for the view layer.

## 2. Processing Pattern (Detailed Business Logic)

The method contains no conditional branches, loops, or method calls. It follows a direct construction pattern:

1. Instantiate a new `ArrayList<String>`.
2. Add the single field name `"アンケ－ト番号"` (Questionnaire Number) to the list.
3. Return the populated list.

```mermaid
flowchart TD
    START(["listKoumokuIds()"])
    STEP1["Create ArrayList<String> koumokuList"]
    STEP2["koumokuList.add(\"アンケ－ト番号\")"]
    END_RETURN["Return koumokuList"]

    START --> STEP1
    STEP1 --> STEP2
    STEP2 --> END_RETURN
```

## 3. Parameter Analysis

| No | Parameter Name | Type | Business Description |
|----|---------------|------|---------------------|
| - | (none) | - | This is a static no-argument method. It does not accept any parameters or instance state. |

The method does not read any instance fields or external state. It is a pure factory producing a fixed result.

## 4. CRUD Operations / Called Services

This method performs no CRUD operations. It contains no service component (SC) calls, no CBS calls, and no data access. It only constructs an in-memory list.

| CRUD | SC / CBS | SC Code | Entity / DB | Operation Description |
|------|----------|---------|-------------|----------------------|
| (none) | — | — | — | No database or service calls are made. |

## 5. Dependency Trace

No callers were found in the codebase for `FUW00156SF01DBean.listKoumokuIds()`. The method is declared as `static` and may be invoked directly by other classes in the FUW00156SF screen module, or it may be called through the X33V framework's introspection mechanism (where the framework looks up `listKoumokuIds` via reflection on beans that implement `X33VListedBeanInterface`).

| # | Caller (Screen/Batch) | Call Chain (Full Path to this Method) | Terminal (SC / CRUD / Entity) |
|---|----------------------|--------------------------------------|-------------------------------|
| 1 | (framework reflection) | X33V framework introspection -> `FUW00156SF01DBean.listKoumokuIds()` | (none — no downstream calls) |

Note: Direct callers were not found via static search. The method is likely invoked at runtime by the X33V web framework during view screen initialization for the screen associated with the FUW00156SF module.

## 6. Per-Branch Detail Blocks

This method has no conditional branches, loops, or try-catch blocks. The full method body is a single linear execution path.

**Block 1** — [METHOD BODY] (L194)

> The entire method body executes as a linear sequence with no branching.

| # | Type | Code |
|---|------|------|
| 1 | SET | `ArrayList<String> koumokuList = new ArrayList<String>();` // Initialize empty list |
| 2 | SET | `koumokuList.add("アンケ－ト番号")` // Add "Questionnaire Number" field name [-> LONG VOWEL MARK: "アンケ－ト番号"] |
| 3 | RETURN | `return koumokuList;` // Return the list containing one field name |

## 7. Glossary

| Term | Type | Business Meaning |
|------|------|------------------|
| `koumokuList` | Field | Item name list — the ArrayList of field identifiers that the X33V framework uses to render a data-type view screen |
| `アンケ－ト番号` | Field | Questionnaire Number — the single field name declared by this bean; refers to an internal questionnaire/tracking number used in the FUW00156SF business context |
| X33V / X31C | Technical | Fujitsu Futurity web framework — a commercial Java EE component suite for building web applications; `X33VListedBeanInterface` defines the contract for bean classes that supply metadata to the view engine |
| DBean | Abbreviation | Data-type Bean — a bean class that defines the structure and data types of fields displayed in a data-type view screen |
| FUW00156SF | Module | Business screen module identifier — a screen module name in the K-Opticom system; the specific business purpose corresponds to questionnaire number management |
| Web View | Layer | The view/controller layer where `X33V` framework beans operate, responsible for assembling data for display in web screens |