# (DD04) Business Logic — OrderService.createOrder() [5 LOC]

| Field | Value |
|-------|-------|
| Fully Qualified Name | `com.example.service.OrderService` |
| Layer | Service |
| Module | `service` (Package: `com.example.service`) |

## 1. Role

### OrderService.createOrder()

Source files and line references for the requested method were not available in the execution environment, so this document captures only the verified structural metadata from the task request. The method name and signature indicate that it is the primary business operation for creating an `Order` from a `User` customer context. In a typical service-layer design, this method would act as an orchestration entry point that validates input, assembles order data, and delegates persistence or downstream fulfillment steps to lower-level components. Because no source body was accessible, no branch-specific business rules, constants, or delegated service categories can be confirmed here. No additional behavioral claims are made beyond the method’s documented contract.

## 2. Processing Pattern (Detailed Business Logic)

```mermaid
flowchart TD
    START["createOrder(customer)"]
    PROCESS["Method body not accessible in source scan"]
    END_NODE["Return Order"]
    START --> PROCESS
    PROCESS --> END_NODE
```

## 3. Parameter Analysis

| No | Parameter Name | Type | Business Description |
|----|---------------|------|---------------------|
| 1 | `customer` | `User` | The customer account or person context used to create the order. The source body was not available, so the exact business usage, nullability, and branching impact cannot be verified. |

Instance fields or external state read by the method could not be confirmed because the method source was unavailable.

## 4. CRUD Operations / Called Services

No called methods could be verified from the unavailable source body. Therefore, no CRUD rows are documented here.

| CRUD | SC / CBS | SC Code | Entity / DB | Operation Description |
|------|----------|---------|-------------|-----------------------|
| N/A | N/A | N/A | N/A | No source evidence available for method calls or persistence operations. |

## 5. Dependency Trace

No caller list could be verified from the unavailable repository path and no downstream calls were visible in the method body. Therefore, no dependency trace rows can be asserted from evidence.

| # | Caller (Screen/Batch) | Call Chain (Full Path to this Method) | Terminal (SC / CRUD / Entity) |
|---|----------------------|--------------------------------------|-------------------------------|
| N/A | N/A | N/A | N/A |

## 6. Per-Branch Detail Blocks

The method body was not accessible in the source scan, so no control-flow blocks could be verified.

**Block 1** — [METHOD ENTRY] `(createOrder(customer))`

| # | Type | Code |
|---|------|------|
| 1 | RETURN | `Order` result cannot be verified from source evidence. |

## 7. Glossary

| Term | Type | Business Meaning |
|------|------|------------------|
| `createOrder` | Method | Order creation business operation. Exact implementation details could not be verified from source evidence. |
| `customer` | Parameter | Customer context used to drive order creation. |
| `User` | Domain object | User/customer entity passed into the service layer. |
| `Order` | Domain object | Order aggregate returned by the service. |
| `Service` | Layer | Business logic layer that orchestrates domain operations. |