# Business Logic — KKW00801SF03DBean.listKoumokuIds() [16 LOC]

| Field | Value |
|-------|-------|
| Fully Qualified Name | `eo.web.webview.KKW00801SF.KKW00801SF03DBean` |
| Layer | Data Bean / View Model (WebClient data model) |
| Module | `KKW00801SF` (Package: `eo.web.webview.KKW00801SF`) |

## 1. Role

### KKW00801SF03DBean.listKoumokuIds()

This method serves as a static factory that returns a fixed list of field labels (item names / 項目名) used to define the columns or data fields of a data type bean in the KKW00801SF screen module. The labels represent metadata about **code definitions** (コード), including the code type, code category, effective date range, and display ordering — essentially describing how a code definition entity is presented in the UI.

The method implements a **list-of-keys** design pattern, where each element in the returned `ArrayList<String>` corresponds to a key used by the view framework to map display labels to UI column headers or form field captions. It is called by the parent bean `KKW00801SFBean` (at line 1543) to resolve the column structure for the "Code Type" data type bean.

As a static utility method with no conditional branches, no external calls, and no CRUD operations, this method is a pure data provider. It is shared across screens in the KKW00801SF module that display code definition tables and ensures all UI rendering uses a consistent set of field identifiers.

## 2. Processing Pattern (Detailed Business Logic)

```mermaid
flowchart TD
    START(["listKoumokuIds()"])
    STEP1["Create ArrayList"]
    STEP2["Add Code Type Code"]
    STEP3["Add Code Type Name"]
    STEP4["Add Code Type Description"]
    STEP5["Add Code Category"]
    STEP6["Add Code Category Name"]
    STEP7["Add Code Category Abbreviation"]
    STEP8["Add Code Application Start Date"]
    STEP9["Add Code Application End Date"]
    STEP10["Add Display Order"]
    STEP11["Add Default Display Code"]
    STEP12["Add Default Display Code Name"]
    END_NODE(["Return koumokuList"])

    START --> STEP1
    STEP1 --> STEP2
    STEP2 --> STEP3
    STEP3 --> STEP4
    STEP4 --> STEP5
    STEP5 --> STEP6
    STEP6 --> STEP7
    STEP7 --> STEP8
    STEP8 --> STEP9
    STEP9 --> STEP10
    STEP10 --> STEP11
    STEP11 --> STEP12
    STEP12 --> END_NODE
```

## 3. Parameter Analysis

| No | Parameter Name | Type | Business Description |
|----|---------------|------|---------------------|
| - | (none) | - | This method takes no parameters. It is a static factory that returns a fixed, hardcoded list of field labels. |

No instance fields or external state are read by this method.

## 4. CRUD Operations / Called Services

This method performs no CRUD operations. It does not call any service components, data access methods, or business services. It is a pure data factory that returns a static list of UI labels.

| CRUD | SC / CBS | SC Code | Entity / DB | Operation Description |
|------|----------|---------|-------------|----------------------|
| — | N/A | — | — | No database or service interactions. |

## 5. Dependency Trace

| # | Caller (Screen/Batch) | Call Chain (Full Path to this Method) | Terminal (SC / CRUD / Entity) |
|---|----------------------|--------------------------------------|-------------------------------|
| 1 | Bean:KKW00801SFBean | `KKW00801SFBean.resolveDataType` → `KKW00801SF03DBean.listKoumokuIds()` | (none — data factory only) |

This method is a static utility called directly from the parent bean `KKW00801SFBean` (at line 1543) to resolve the column structure for the code definition data type bean. No deeper caller chain exists because `KKW00801SFBean` is itself a view model bean that does not have further callers documented in the codebase.

## 6. Per-Branch Detail Blocks

**Block 1** — [SEQUENCE OF OPERATIONS] (L878)

> Initialize the list container and populate all field labels.

| # | Type | Code |
|---|------|------|
| 1 | SET | `koumokuList = new ArrayList<String>()` // Create empty list for item names |
| 2 | EXEC | `koumokuList.add("コード種別コード")` // Add "Code Type Code" [→ label for code type identifier column] |
| 3 | EXEC | `koumokuList.add("コード種別名")` // Add "Code Type Name" [→ label for code type name column] |
| 4 | EXEC | `koumokuList.add("コード種別説明")` // Add "Code Type Description" [→ label for code type description column] |
| 5 | EXEC | `koumokuList.add("コード区分")` // Add "Code Category" [→ label for code category column] |
| 6 | EXEC | `koumokuList.add("コード区分名")` // Add "Code Category Name" [→ label for code category name column] |
| 7 | EXEC | `koumokuList.add("コード区分略称")` // Add "Code Category Abbreviation" [→ label for code category abbreviation column] |
| 8 | EXEC | `koumokuList.add("コード適用開始年月日")` // Add "Code Application Start Date" [→ label for effective-from date column] |
| 9 | EXEC | `koumokuList.add("コード適用終了年月日")` // Add "Code Application End Date" [→ label for effective-until date column] |
| 10 | EXEC | `koumokuList.add("表示順序")` // Add "Display Order" [→ label for column sort order column] |
| 11 | EXEC | `koumokuList.add("初期表示コード")` // Add "Default Display Code" [→ label for default code column] |
| 12 | EXEC | `koumokuList.add("初期表示コード名称")` // Add "Default Display Code Name" [→ label for default code name column] |
| 13 | RETURN | `return koumokuList` // Return populated list [12 elements] |

## 7. Glossary

| Term | Type | Business Meaning |
|------|------|------------------|
| 項目名 (Koumoku-mei) | Field | Item name — a field label/key used by the view framework to identify UI columns or data fields in a data type bean |
| コード種別コード | Field | Code Type Code — the identifier for a code type classification (e.g., whether a code entry is a main type, sub-type, or variant) |
| コード種別名 | Field | Code Type Name — the human-readable display name for the code type |
| コード種別説明 | Field | Code Type Description — a descriptive text explaining the purpose and scope of the code type |
| コード区分 | Field | Code Category — a sub-classification within a code type (e.g., regional code, service-type code, status code) |
| コード区分名 | Field | Code Category Name — the display name for a specific code category |
| コード区分略称 | Field | Code Category Abbreviation — a shortened form of the code category name used in narrow UI spaces |
| コード適用開始年月日 | Field | Code Application Start Date — the effective date from which a code definition becomes active |
| コード適用終了年月日 | Field | Code Application End Date — the effective date until which a code definition remains valid |
| 表示順序 | Field | Display Order — a numeric sort order value controlling the column position in data grid/table rendering |
| 初期表示コード | Field | Default Display Code — the code value that is selected or shown by default when the screen loads |
| 初期表示コード名称 | Field | Default Display Code Name — the human-readable name associated with the default display code |
| データタイプビーン (Data Type Bean) | Domain | A data type bean is a model object that encapsulates the structure and metadata of a table-like data set used in WebClient screens. The `listKoumokuIds` method returns the field key list that defines this structure. |
| KKW00801SF | Module | K-Opticom Code Definition Management screen module — handles code type and code category definitions for the telecom billing and provisioning system |