# Business Logic — KKW01031SF01DBean.listKoumokuIds() [11 LOC]

| Field | Value |
|-------|-------|
| Fully Qualified Name | `eo.web.webview.KKW01031SF.KKW01031SF01DBean` |
| Layer | Web — DBean (Data Bean / View Helper) |
| Module | `KKW01031SF` (Package: `eo.web.webview.KKW01031SF`) |

## 1. Role

### KKW01031SF01DBean.listKoumokuIds()

This method returns a predefined, ordered list of **field name labels** (item names) that are displayed on the data-type view screen. The Javadoc — *データタイプビューンの項目名のリストを返す* ("Returns the list of item names for the data type bean") — describes its purpose: to provide the set of column headings or row labels that the view uses when rendering data.

The method follows a **static factory / enumeration pattern** — it is a self-contained static method that builds and returns an immutable-seeming list of Japanese domain labels. These labels represent business data fields associated with a data type (identified by the preceding SSIPDT entry), and they are consumed by the view layer to populate dropdowns, table headers, or label text on the screen.

Because the method is static and requires no instance state or parameters, its role in the larger system is that of a **shared utility** used across the `KKW01031SF` web module. Any screen or component within this module can call `listKoumokuIds()` to obtain a consistent, centrally-managed list of field labels — ensuring that UI text remains synchronized with the underlying data contract.

There are no conditional branches; the method executes a linear sequence of list insertions.

## 2. Processing Pattern (Detailed Business Logic)

```mermaid
flowchart TD
    START(["listKoumokuIds()"])
    CREATE_AL["Create new ArrayList of String"]
    ADD_1["Add SSIPDT"]
    ADD_2["Add Service Contract Number"]
    ADD_3["Add Change Type"]
    ADD_4["Add Change Reason Code"]
    ADD_5["Add Change Reason Memo"]
    ADD_6["Add Application Number"]
    ADD_7["Add Application Detail Number"]
    RETURN_KL["Return koumokuList"]
    END_NODE["Return / Next"]

    START --> CREATE_AL
    CREATE_AL --> ADD_1
    ADD_1 --> ADD_2
    ADD_2 --> ADD_3
    ADD_3 --> ADD_4
    ADD_4 --> ADD_5
    ADD_5 --> ADD_6
    ADD_6 --> ADD_7
    ADD_7 --> RETURN_KL
    RETURN_KL --> END_NODE
```

**Processing description:**

1. **Create** an empty `ArrayList<String>` named `koumokuList`.
2. **Add 7 labels sequentially** in a fixed order:
   - `SSIPDT` — a data type identifier code
   - `サービス契約番号` — Service Contract Number
   - `異動区分` — Change Type
   - `異動理由コード` — Change Reason Code
   - `異動理由メモ` — Change Reason Memo
   - `申請番号` — Application Number
   - `申請詳細番号` — Application Detail Number
3. **Return** the populated list to the caller.

This is a linear, branch-free execution path. All 7 labels are hardcoded string literals; no constants, configuration, or external data sources are involved.

## 3. Parameter Analysis

| No | Parameter Name | Type | Business Description |
|----|---------------|------|---------------------|
| - | (none) | - | This method takes no parameters. It is a static method that returns a self-defined list of labels. |
| - | (implicit) | - | No instance fields or external state are accessed. The method is entirely self-contained. |

## 4. CRUD Operations / Called Services

This method performs **no CRUD operations** and calls **no external services, SC (Service Component) methods, or CBS (Common Business Service) methods**. It operates purely at the presentation layer, building an in-memory list of string labels.

| CRUD | SC / CBS | SC Code | Entity / DB | Operation Description |
|------|----------|---------|-------------|----------------------|
| — | (none) | — | — | No database or service component interactions. This is a pure in-memory data provider for the view layer. |

## 5. Dependency Trace

No callers were found for `listKoumokuIds()` in the codebase.

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

**Note:** As a static utility method on a DBean, this method is likely consumed at compile time or via reflection-based UI binding (e.g., a view renderer iterates over the returned list to build table columns). The absence of direct Java callers suggests it may be invoked through a scripting layer, framework annotation, or generated code.

## 6. Per-Branch Detail Blocks

**Block 1** — [SET] `(allocate new ArrayList)` (L489)

> Create the return list container.

| # | Type | Code |
|---|------|------|
| 1 | SET | `ArrayList<String> koumokuList = new ArrayList<String>();` // Allocate new list to hold field name labels |

**Block 2** — [EXEC / Sequential Adds] `(populate list with field labels)` (L490–L496)

> Add the 7 hardcoded label strings in their display order.

| # | Type | Code |
|---|------|------|
| 1 | EXEC | `koumokuList.add("SSIPDT");` // Add data type identifier label |
| 2 | EXEC | `koumokuList.add("サービス契約番号");` // Add Service Contract Number label |
| 3 | EXEC | `koumokuList.add("異動区分");` // Add Change Type label |
| 4 | EXEC | `koumokuList.add("異動理由コード");` // Add Change Reason Code label |
| 5 | EXEC | `koumokuList.add("異動理由メモ");` // Add Change Reason Memo label |
| 6 | EXEC | `koumokuList.add("申請番号");` // Add Application Number label |
| 7 | EXEC | `koumokuList.add("申請詳細番号");` // Add Application Detail Number label |

**Block 3** — [RETURN] `(return result)` (L496)

> Return the completed list to the caller.

| # | Type | Code |
|---|------|------|
| 1 | RETURN | `return koumokuList;` // Return the list of field name labels |

## 7. Glossary

| Term | Type | Business Meaning |
|------|------|-----------------|
| `DBean` | Technical | Data Bean — a view-layer class that encapsulates data used to render a specific screen or dialog in the web UI |
| `SSIPDT` | Field | Data Type Identifier — a short code identifying the data type classification used in view rendering |
| `サービス契約番号` (Service Contract Number) | Field | The contract number assigned to a service agreement — used to uniquely identify a service contract line item |
| `異動区分` (Change Type) | Field | The classification of a change or modification event (e.g., addition, deletion, update) applied to a record |
| `異動理由コード` (Change Reason Code) | Field | A code specifying the reason why a change or modification was made to a service record |
| `異動理由メモ` (Change Reason Memo) | Field | A free-text memo explaining the rationale behind a change or modification event |
| `申請番号` (Application Number) | Field | An application/tracking number assigned to a request or order submitted through the system |
| `申請詳細番号` (Application Detail Number) | Field | A sub-identifier that distinguishes individual line items or details within a broader application number |
| `koumoku` | Japanese term | Item / field — refers to a column, row label, or data element in a UI table or form |