# Business Logic — KKW01031SF02DBean.listKoumokuIds() [17 LOC]

| Field | Value |
|-------|-------|
| Fully Qualified Name | `eo.web.webview.KKW01031SF.KKW01031SF02DBean` |
| Layer | View / Data Bean (Inferred from package path: `eo.web.webview`) |
| Module | `KKW01031SF` (Package: `eo.web.webview.KKW01031SF`) |

## 1. Role

### KKW01031SF02DBean.listKoumokuIds()

This method is a static factory that returns a predefined, ordered list of 13 Japanese display label strings for the data type view screen of module KKW01031SF. The labels correspond to UI column headers shown to end users in a tabular data grid — for example, "番号／件数" (Number / Count), "契約種別" (Contract Type), "ステータス" (Status), and others. It follows the **builder pattern** (specifically, a list-builder factory): it instantiates an empty `ArrayList<String>`, populates it with literal display strings in a fixed sequence, and returns the populated list. As a shared data bean utility, it acts as a **lookup source** for the screen controller or presenter layer, which consumes the returned list to populate dropdown metadata, column definitions, or data type hint components. The ordering of items is intentional — it reflects the visual left-to-right column arrangement on the data type view screen.

## 2. Processing Pattern (Detailed Business Logic)

```mermaid
flowchart TD
    START(["Static factory: listKoumokuIds()"])
    INIT["Initialize: ArrayList<String> koumokuList = new ArrayList<String>()"]

    START --> INIT

    INIT --> A1["ADD 1: \"番号／件数\""]
    A1 --> A2["ADD 2: \"番号\""]
    A2 --> A3["ADD 3: \"契約種別\""]
    A3 --> A4["ADD 4: \"更新年月日時刻更新前\""]
    A4 --> A5["ADD 5: \"キャパ的名称\""]
    A5 --> A6["ADD 6: \"ステータス\""]
    A6 --> A7["ADD 7: \"ステータス名称\""]
    A7 --> A8["ADD 8: \"タイプコード\""]
    A8 --> A9["ADD 9: \"タイプコード名称\""]
    A9 --> A10["ADD 10: \"即時適用フラグ\""]
    A10 --> A11["ADD 11: \"即時適用フラグ名称\""]
    A11 --> A12["ADD 12: \"開始年月日\""]
    A12 --> A13["ADD 13: \"終了年月日\""]
    A13 --> END["Return koumokuList (13-item ArrayList)"]
```

**Processing Summary:**

| Step | Operation | Business Meaning |
|------|-----------|-----------------|
| 1 | `new ArrayList<String>()` | Create an empty, mutable list to hold column header labels |
| 2–14 | `koumokuList.add(...)` (×13) | Append Japanese display strings in the exact order they should appear as table columns |
| 15 | `return koumokuList` | Hand off the complete label list to the caller for UI consumption |

## 3. Parameter Analysis

| No | Parameter Name | Type | Business Description |
|----|---------------|------|---------------------|
| - | (none) | - | This is a static method with no parameters. It returns a fixed, hardcoded list — no configuration or runtime input affects its output. |

**No instance fields or external state** are read by this method. It is entirely self-contained and stateless.

## 4. CRUD Operations / Called Services

This method performs **no CRUD operations**. It does not call any Service Components (SC), Common Business Services (CBS), database accessors, or external services. It is a pure data-provider that constructs and returns an in-memory list.

| CRUD | SC / CBS | SC Code | Entity / DB | Operation Description |
|------|----------|---------|-------------|----------------------|
| *(none)* | — | — | — | This method creates and returns a simple `ArrayList<String>` of display labels. No database or service interaction occurs. |

## 5. Dependency Trace

| # | Caller (Screen/Batch) | Call Chain (Full Path to this Method) | Terminal (SC / CRUD / Entity) |
|---|----------------------|--------------------------------------|-------------------------------|
| 1 | Screen:KKW01031SF (implicit) | `KKW01031SF02DBean.listKoumokuIds()` | *(no terminal — pure factory)* |

**Notes:** The static `listKoumokuIds()` method on this specific bean (`KKW01031SF02DBean`) was not found to be called from any other Java file within the searched scope. This is common for data type view beans where the method may be invoked at runtime via reflection, from JSP/JSTL expressions, or through a generic bean access mechanism (e.g., `getRequestValue()` delegation in a parent base class). Similar `listKoumokuIds()` implementations exist across the codebase in other DBeans (e.g., `FUW00912SF01DBean`, `FUW00959SF01DBean`, `FUW00926SF01DBean`), all following the same pattern of returning fixed column label lists.

## 6. Per-Branch Detail Blocks

**Block 1** — [PROCESSING] (L848)

> Static factory entry point — initialize the output list.

| # | Type | Code |
|---|------|------|
| 1 | SET | `ArrayList<String> koumokuList = new ArrayList<String>()` // Create empty list for column labels |

**Block 2** — [SEQUENCE: ADD operations] (L850–L863)

> Populate the list with 13 Japanese display labels in fixed order.

| # | Type | Code |
|---|------|------|
| 1 | SET | `koumokuList.add("番号／件数")` // Add "Number / Count" label (L850) |
| 2 | SET | `koumokuList.add("番号")` // Add "Number" label (L851) |
| 3 | SET | `koumokuList.add("契約種別")` // Add "Contract Type" label (L852) |
| 4 | SET | `koumokuList.add("更新年月日時刻更新前")` // Add "Update Date/Time Before Update" label (L853) |
| 5 | SET | `koumokuList.add("キャパ的名称")` // Add "Capacity Name" label (L854) |
| 6 | SET | `koumokuList.add("ステータス")` // Add "Status" label (L855) |
| 7 | SET | `koumokuList.add("ステータス名称")` // Add "Status Name" label (L856) |
| 8 | SET | `koumokuList.add("タイプコード")` // Add "Type Code" label (L857) |
| 9 | SET | `koumokuList.add("タイプコード名称")` // Add "Type Code Name" label (L858) |
| 10 | SET | `koumokuList.add("即時適用フラグ")` // Add "Immediate Application Flag" label (L859) |
| 11 | SET | `koumokuList.add("即時適用フラグ名称")` // Add "Immediate Application Flag Name" label (L860) |
| 12 | SET | `koumokuList.add("開始年月日")` // Add "Start Date" label (L861) |
| 13 | SET | `koumokuList.add("終了年月日")` // Add "End Date" label (L862) |

**Block 3** — [RETURN] (L863)

> Hand off the completed list to the caller.

| # | Type | Code |
|---|------|------|
| 1 | RETURN | `return koumokuList;` // Return 13-item ArrayList of display labels (L863) |

## 7. Glossary

| Term | Type | Business Meaning |
|------|------|------------------|
| `koumoku` (項目) | Field | Item / field — refers to a column or data item in a data grid view |
| `番号／件数` | Display Label | Number / Count — composite header showing record number alongside total item count |
| `契約種別` | Display Label | Contract Type — classification of the type of service contract (e.g., new, renewal, modification) |
| `更新年月日時刻更新前` | Display Label | Update Date/Time Before Update — the timestamp of a record before the most recent modification was applied |
| `キャパ的名称` | Display Label | Capacity Name — human-readable name for a capacity or bandwidth plan |
| `ステータス` | Display Label | Status — current state of the record (e.g., active, suspended, closed) |
| `ステータス名称` | Display Label | Status Name — human-readable description of the status value |
| `タイプコード` | Display Label | Type Code — a machine-readable code identifying the record type |
| `タイプコード名称` | Display Label | Type Code Name — human-readable label corresponding to the type code |
| `即時適用フラグ` | Display Label | Immediate Application Flag — boolean indicator whether changes take effect immediately or at a scheduled time |
| `即時適用フラグ名称` | Display Label | Immediate Application Flag Name — display text for the flag (e.g., "Yes" / "No") |
| `開始年月日` | Display Label | Start Date — the effective start date of a service or contract period |
| `終了年月日` | Display Label | End Date — the effective end date of a service or contract period |
| DBean (Data Bean) | Pattern | A data-holding bean used in the view layer to carry screen-specific data between controller and JSP |
| KKW01031SF | Module | A screen module (SF = Screen) in the telecom service order system, handling data type view operations |