---
title: Business Logic — FUW00156SF03DBean.listKoumokuIds()
layer: Utility
module: FUW00156SF
---

# Business Logic — FUW00156SF03DBean.listKoumokuIds() [6 LOC]

| Field | Value |
|-------|-------|
| Fully Qualified Name | `eo.web.webview.FUW00156SF.FUW00156SF03DBean` |
| Layer | Utility (Static bean factory within webview layer) |
| Module | `FUW00156SF` (Package: `eo.web.webview.FUW00156SF`) |

## 1. Role

### FUW00156SF03DBean.listKoumokuIds()

This method is a **static factory** that provides a fixed catalog of field identifiers (item names) used to describe data type columns within the `FUW00156SF` data type bean framework. The Javadoc states: "Return the list of item names for the data type bean" (データタイプビーンの項目名のリストを返す). It implements a simple **enumeration pattern** — rather than querying a database or reading configuration, it returns a hardcoded list of two Japanese field names that serve as metadata keys for downstream screen or validation logic. These field names represent email-related data columns: the recipient email address and the email address setting field code. This method is designed as a **shared utility** that could be called by any screen or component needing to enumerate the valid field names for this data type, but it currently has no callers in the codebase, suggesting it may be a forward-facing API for screens that have not yet been implemented.

## 2. Processing Pattern (Detailed Business Logic)

```mermaid
flowchart TD
    START(["listKoumokuIds()"])
    INIT["Create empty ArrayList<String> koumokuList"]
    ADD1["koumokuList.add('送信先メールアドレス')
// Add recipient email address"]
    ADD2["koumokuList.add('メールアドレス設定フィールドコード')
// Add email address setting field code"]
    RET["Return koumokuList"]

    START --> INIT
    INIT --> ADD1
    ADD1 --> ADD2
    ADD2 --> RET
```

The method has a strictly linear execution path with no conditional branches, loops, or method calls to external services.

**Processing steps:**
1. Allocate a new `ArrayList<String>` to hold the item name entries.
2. Append the Japanese field name `"送信先メールアドレス"` (recipient email address) as the first entry.
3. Append the Japanese field name `"メールアドレス設定フィールドコード"` (email address setting field code) as the second entry.
4. Return the populated list.

## 3. Parameter Analysis

| No | Parameter Name | Type | Business Description |
|----|---------------|------|---------------------|
| - | (none) | - | This method takes no parameters; it is a parameterless static factory returning a fixed catalog |

**Instance fields / external state read:** None. The method is completely self-contained and has no dependencies on instance state, configuration, or external systems.

## 4. CRUD Operations / Called Services

This method performs **no CRUD operations** and **calls no services**. It creates an in-memory list and returns it without any database, cache, or remote service interaction.

| CRUD | SC / CBS | SC Code | Entity / DB | Operation Description |
|------|----------|---------|-------------|----------------------|
| — | — | — | — | No external operations; pure in-memory list construction |

## 5. Dependency Trace

No callers were found in the codebase. This method is currently **unreferenced** by any screen, CBS, controller, or batch.

| # | Caller (Screen/Batch) | Call Chain (Full Path to this Method) | Terminal (SC / CRUD / Entity) |
|---|----------------------|--------------------------------------|-------------------------------|
| — | (none found) | — | — |

**Note:** The method is declared `public static` and is designed to be called from any class within or outside the `FUW00156SF` module, but no existing code invokes it.

## 6. Per-Branch Detail Blocks

### Block 1 — Method Entry (L226)

> Method declaration: static factory returning a list of field identifiers.

| # | Type | Code |
|---|------|------|
| 1 | DECL | `public static ArrayList<String> listKoumokuIds()` |

### Block 1.1 — Initialization (L227)

> Allocate the result list.

| # | Type | Code |
|---|------|------|
| 1 | SET | `ArrayList<String> koumokuList = new ArrayList<String>();` |

### Block 1.2 — First Item (L228)

> Append the first field name: recipient email address.

| # | Type | Code |
|---|------|------|
| 1 | EXEC | `koumokuList.add("送信先メールアドレス");` |

### Block 1.3 — Second Item (L229)

> Append the second field name: email address setting field code.

| # | Type | Code |
|---|------|------|
| 1 | EXEC | `koumokuList.add("メールアドレス設定フィールドコード");` |

### Block 1.4 — Return (L230)

> Return the populated list to the caller.

| # | Type | Code |
|---|------|------|
| 1 | RETURN | `return koumokuList;` |

## 7. Glossary

| Term | Type | Business Meaning |
|------|------|------------------|
| `koumoku` (項目) | Field | Item / field — refers to a named column or property within a data type definition |
| `koumokuList` | Field | Item name list — the ArrayList containing the enumerated field identifier strings |
| `データタイプビーン` (data type bean) | Concept | Data type bean — a Java class used to define the schema and metadata for typed data columns in the web framework |
| 送信先メールアドレス | Field | Recipient email address — the email address to which notifications or communications are sent |
| メールアドレス設定フィールドコード | Field | Email address setting field code — the system field code identifier used to configure the email address data column in screens |
| FUW00156SF | Module | Web view module for data type bean definitions in the EE web application layer |