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# Business Logic — KKW00801SF02DBean.listKoumokuIds() [6 LOC]

| Field | Value |
|-------|-------|
| Fully Qualified Name | `eo.web.webview.KKW00801SF.KKW00801SF02DBean` |
| Layer | Utility / Data Bean (View-layer data carrier) |
| Module | `KKW00801SF` (Package: `eo.web.webview.KKW00801SF`) |

## 1. Role

### KKW00801SF02DBean.listKoumokuIds()

This method serves as a **static data provider** for the dropdown option metadata used in the `KKW00801SF` screen module. It returns an `ArrayList<String>` containing the item name labels ("Dropdown Option Value" and "Dropdown Option Name" in Japanese) that define the column/ordering of dropdown select options presented to the end user on the web form. It implements the **static factory** design pattern: rather than requiring an instance of the bean to be instantiated, the list is obtained directly via a static method call, enabling screens and other beans to retrieve the item metadata without dependency on bean lifecycle management. This method is a shared utility called by the screen controller or parent bean during data binding and form rendering — it provides the metadata about *what fields/labels* should appear in a dropdown select component, not the actual dropdown values themselves. The two items correspond to the internal value key and the display label for a single dropdown select option field.

## 2. Processing Pattern (Detailed Business Logic)

```mermaid
flowchart TD
    START([listKoumokuIds])
    INIT["Initialize: ArrayList&lt;String&gt; koumokuList"]
    ADD1["ADD: koumokuList.add(&quot;プルダウンオプション値&quot; / &quot;Dropdown Option Value&quot;)"]
    ADD2["ADD: koumokuList.add(&quot;プルダウンオプション名&quot; / &quot;Dropdown Option Name&quot;)"]
    RETURN["Return: koumokuList"]
    START --> INIT
    INIT --> ADD1
    ADD1 --> ADD2
    ADD2 --> RETURN
```

This method performs a straightforward sequential initialization and population of a string list with two hardcoded item name entries. There are no conditional branches, no external calls, and no constant resolution needed. The method constructs an `ArrayList`, adds two predefined Japanese strings representing dropdown option metadata labels, and returns the list.

## 3. Parameter Analysis

| No | Parameter Name | Type | Business Description |
|----|---------------|------|---------------------|
| - | (none) | - | - |

This method takes no parameters. It is a static method that returns a constant list — no input data is required. The return value is self-contained and does not depend on any instance state or external configuration.

## 4. CRUD Operations / Called Services

This method performs **no CRUD operations** and calls **no external services, CBS components, or SC components**. It operates purely as an in-memory data builder, creating and populating an `ArrayList` with string literals.

| CRUD | SC / CBS | SC Code | Entity / DB | Operation Description |
|------|----------|---------|-------------|----------------------|
| (none) | — | — | — | No database or service interactions |

## 5. Dependency Trace

| # | Caller (Screen/Batch) | Call Chain (Full Path to this Method) | Terminal (SC / CRUD / Entity) |
|---|----------------------|--------------------------------------|-------------------------------|
| — | No callers found | — | — |

No callers were found for `KKW00801SF02DBean.listKoumokuIds()` across the entire codebase. The method exists as a publicly accessible static utility within the bean but is not currently invoked by any screen, controller, or CBS class in the `koptWebB` source tree. It may be used at runtime by dynamically-loaded screen definitions, generated code, or may have been removed from active use in a refactoring.

## 6. Per-Branch Detail Blocks

This method has no conditional branches or control flow complexity. It executes as a linear sequence of operations:

**Block 1** — [LINEAR SEQUENCE] `(no conditions)` (L256)

> Initialize an empty ArrayList and populate it with two dropdown option item name strings.

| # | Type | Code |
|---|------|------|
| 1 | SET | `ArrayList<String> koumokuList = new ArrayList<String>();` // Initialize empty list |
| 2 | EXEC | `koumokuList.add("プルダウンオプション値");` // Add Japanese label "Dropdown Option Value" [-> "プルダウンオプション値" / "Dropdown Option Value"] |
| 3 | EXEC | `koumokuList.add("プルダウンオプション名");` // Add Japanese label "Dropdown Option Name" [-> "プルダウンオプション名" / "Dropdown Option Name"] |
| 4 | RETURN | `return koumokuList;` // Return the populated list |

## 7. Glossary

| Term | Type | Business Meaning |
|------|------|------------------|
| `koumoku` | Field | Item / field — Japanese term for data items or fields in a form, used as the variable name prefix (e.g., `koumokuList`) |
| `プルダウンオプション値` | Field (Japanese) | Dropdown Option Value — the internal data value stored for a dropdown select option (as opposed to the display text) |
| `プルダウンオプション名` | Field (Japanese) | Dropdown Option Name — the human-readable label displayed to the user in a dropdown select option |
| DBean | Acronym | Data Bean — a view-layer data carrier class that holds form data, metadata, and UI configuration for a specific screen |
| listKoumokuIds | Method | Items IDs list — returns the ordered list of field/item identifiers for a dropdown option field |
| KKW00801SF | Module | Screen module code — a web screen module within the `eo.web.webview` package handling a specific business form |

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