# Business Logic — JBSbatKKPlaceNoChgRnkiInfCst.terminal() [18 LOC]

| Field | Value |
|-------|-------|
| Fully Qualified Name | `eo.business.service.JBSbatKKPlaceNoChgRnkiInfCst` |
| Layer | Service (Batch Service Component) |
| Module | `service` (Package: `eo.business.service`) |

## 1. Role

### JBSbatKKPlaceNoChgRnkiInfCst.terminal()

This method implements the business service termination processing for the "Place Number Change Linked Information Extraction" batch service. The class `JBSbatKKPlaceNoChgRnkiInfCst` extracts service contract line item information that is associated with a place number change (住所変更). The `terminal()` method serves as the resource cleanup handler that is called at the end of the batch service lifecycle. It systematically closes all `JBSbatSQLAccess` database access objects that were initialized during the `initial()` phase, ensuring that database cursors, connection handles, and file descriptors are properly released back to the system. This method implements the standard cleanup/destruction pattern common to the `JBSbatBusinessService` base class hierarchy, acting as the counterpart to the resource allocation performed in `initial()`. It has no conditional branches and executes a deterministic sequential cleanup of all six database access resources, guaranteeing no resource leaks even if the `execute()` method returns early due to validation failures (e.g., empty identification numbers, existing device bindings, or surrendered service status).

## 2. Processing Pattern (Detailed Business Logic)

```mermaid
flowchart TD
    START(["terminal()"])
    CLOSE1["Close db_KK_T_SVKEI_KAISEN_UW
(Service Contract Line Item Details)"]
    CLOSE2["Close db_KK_T_ADCHG_DTL
(Place Change Details)"]
    CLOSE3["Close db_KK_T_KJ_FIN_WK
(Work Completion Work)"]
    CLOSE4["Close db_KU_T_SVKEI_KOJIAK
(Service Contract / Work Case)"]
    CLOSE5["Close db_KK_T_KKTK_SVC_KEI
(Equipment Provision Service Contract)"]
    CLOSE6["Close db_KK_T_SVC_KEI
(Service Contract)"]
    END_NODE(["Return / Next"])

    START --> CLOSE1
    CLOSE1 --> CLOSE2
    CLOSE2 --> CLOSE3
    CLOSE3 --> CLOSE4
    CLOSE4 --> CLOSE5
    CLOSE5 --> CLOSE6
    CLOSE6 --> END_NODE
```

**Processing Summary:**
This method performs a linear, unconditional sequential cleanup of six database access objects. Each `close()` call releases the underlying database cursor and connection handle for one of the tables opened during the `initial()` initialization phase. There are no conditional branches, loops, or method calls beyond the six `close()` invocations.

## 3. Parameter Analysis

| No | Parameter Name | Type | Business Description |
|----|---------------|------|---------------------|
| - | (none) | - | This method takes no parameters. It operates entirely on instance fields (`db_KK_T_*`) that were initialized during the `initial()` phase with the batch common parameters. |

**Instance fields read by this method:**

| No | Field Name | Type | Business Description |
|----|-----------|------|---------------------|
| 1 | `db_KK_T_SVKEI_KAISEN_UW` | `JBSbatSQLAccess` | Database access cursor for the service contract line item details table (`KK_T_SVKEI_KAISEN_UW`) |
| 2 | `db_KK_T_ADCHG_DTL` | `JBSbatSQLAccess` | Database access cursor for the place change details table (`KK_T_ADCHG_DTL`) |
| 3 | `db_KK_T_KJ_FIN_WK` | `JBSbatSQLAccess` | Database access cursor for the work completion work table (`KK_T_KJ_FIN_WK`) |
| 4 | `db_KU_T_SVKEI_KOJIAK` | `JBSbatSQLAccess` | Database access cursor for the service contract / work case table (`KU_T_SVKEI_KOJIAK`) |
| 5 | `db_KK_T_KKTK_SVC_KEI` | `JBSbatSQLAccess` | Database access cursor for the equipment provision service contract table (`KK_T_KKTK_SVC_KEI`) |
| 6 | `db_KK_T_SVC_KEI` | `JBSbatSQLAccess` | Database access cursor for the service contract table (`KK_T_SVC_KEI`) |

## 4. CRUD Operations / Called Services

### Pre-computed evidence from code analysis graph:

| CRUD | SC / CBS | SC Code | Entity / DB | Operation Description |
|------|----------|---------|-------------|----------------------|
| - | `db_KK_T_SVKEI_KAISEN_UW.close` | JBSbatSQLAccess | `KK_T_SVKEI_KAISEN_UW` | Closes the SQL access cursor for the service contract line item details table |
| - | `db_KK_T_ADCHG_DTL.close` | JBSbatSQLAccess | `KK_T_ADCHG_DTL` | Closes the SQL access cursor for the place change details table |
| - | `db_KK_T_KJ_FIN_WK.close` | JBSbatSQLAccess | `KK_T_KJ_FIN_WK` | Closes the SQL access cursor for the work completion work table |
| - | `db_KU_T_SVKEI_KOJIAK.close` | JBSbatSQLAccess | `KU_T_SVKEI_KOJIAK` | Closes the SQL access cursor for the service contract / work case table |
| - | `db_KK_T_KKTK_SVC_KEI.close` | JBSbatSQLAccess | `KK_T_KKTK_SVC_KEI` | Closes the SQL access cursor for the equipment provision service contract table |
| - | `db_KK_T_SVC_KEI.close` | JBSbatSQLAccess | `KK_T_SVC_KEI` | Closes the SQL access cursor for the service contract table |

**Classification:**
These are all **resource deallocation** operations, not traditional CRUD operations. Each `close()` call releases the database cursor and connection handle for the respective table. No read/write/delete/create of data occurs in this method — it solely manages the lifecycle of database access resources.

## 5. Dependency Trace

| # | Caller (Screen/Batch) | Call Chain (Full Path to this Method) | Terminal (SC / CRUD / Entity) |
|---|----------------------|--------------------------------------|-------------------------------|
| 1 | Batch: JBSbatKKAdChgCstScreenKidou | `JBSbatKKAdChgCstScreenKidou` creates `execObjPlaceNoChg` via `new JBSbatKKPlaceNoChgRnkiInfCst()` → `terminal()` | `close [RC] KK_T_SVKEI_KAISEN_UW`, `close [RC] KK_T_ADCHG_DTL`, `close [RC] KK_T_KJ_FIN_WK`, `close [RC] KU_T_SVKEI_KOJIAK`, `close [RC] KK_T_KKTK_SVC_KEI`, `close [RC] KK_T_SVC_KEI` |

**Caller Details:**
- **JBSbatKKAdChgCstScreenKidou** (Batch: Address Change Batch Service — Screen Movement): This is the sole caller of the `terminal()` method. It instantiates `JBSbatKKPlaceNoChgRnkiInfCst` as `execObjPlaceNoChg` (Place Number Change Linked Information Extraction) and calls its `initial()` / `execute()` / `terminal()` lifecycle methods as part of the batch processing pipeline for address change operations.

## 6. Per-Branch Detail Blocks

**Block 1** — [SEQ] `(unconditional cleanup sequence)` (L453)

> The entire method is a sequential, unconditional block that closes six database access cursors in order. The Javadoc comment "業務サービス終了処理" (Business Service Termination Processing) indicates this is the standard teardown method called after the main `execute()` processing is complete.

| # | Type | Code |
|---|------|------|
| 1 | EXEC | `db_KK_T_SVKEI_KAISEN_UW.close();` // Closes the service contract line item details DB cursor [-> DB table: KK_T_SVKEI_KAISEN_UW] |
| 2 | EXEC | `db_KK_T_ADCHG_DTL.close();` // Closes the place change details DB cursor [ST2-2013-0001008対応 20130301 OKITA ADD: Added for place change details table support] |
| 3 | EXEC | `db_KK_T_KJ_FIN_WK.close();` // Closes the work completion work DB cursor |
| 4 | EXEC | `db_KU_T_SVKEI_KOJIAK.close();` // Closes the service contract / work case DB cursor |
| 5 | EXEC | `db_KK_T_KKTK_SVC_KEI.close();` // Closes the equipment provision service contract DB cursor |
| 6 | EXEC | `db_KK_T_SVC_KEI.close();` // Closes the service contract DB cursor [OM-2013-0000735 2013.09.08 T.TORIKAI ADD: Added for service contract table support] |

## 7. Glossary

| Term | Type | Business Meaning |
|------|------|------------------|
| `KK_T_SVKEI_KAISEN_UW` | DB Table | Service Contract Line Item Details — holds line-level details of service contracts, used to track subscription date changes and move-in reservation information |
| `KK_T_ADCHG_DTL` | DB Table | Place Change Details — stores the detail records of place (address) number changes, including the type of change and target contract numbers |
| `KK_T_KJ_FIN_WK` | DB Table | Work Completion Work — a work table tracking the completion status of new installation work orders |
| `KU_T_SVKEI_KOJIAK` | DB Table | Service Contract / Work Case — links service contracts to work case numbers for tracking new installation progress |
| `KK_T_KKTK_SVC_KEI` | DB Table | Equipment Provision Service Contract — stores contracts for equipment provisioning services tied to place number changes |
| `KK_T_SVC_KEI` | DB Table | Service Contract — the master table for all service contracts |
| 住所変更 (Jusho Henkou) | Business term | Place/Address Change — the process of updating a customer's registered address in the telecommunications system |
| 業務サービス終了処理 (Gyomu Saabisu Shuuryo Shori) | Business term | Business Service Termination Processing — the standard cleanup phase of a batch service lifecycle |
| 場所番号変更 (Basho Bangou Henkou) | Business term | Place Number Change — updating the internal place number associated with a customer's service contract |
| JBSbatSQLAccess | Technical | Database SQL access class — manages database cursors, connection handles, and SQL query execution for a specific table |
| `JBSbatBusinessService` | Technical | Base class for all batch business services — defines the standard `initial()` / `execute()` / `terminal()` lifecycle pattern |
| SC Code | Technical | Service Component Code — a coded identifier (e.g., `EKK0361A010SC`) that maps to a specific service component implementation |
| SOD | Business term | Service Order Data — telecom order fulfillment entity used in service provisioning workflows |
| FTTH | Business term | Fiber To The Home — fiber-optic internet service; commonly referenced in order content codes |