# Com / Optage / Kopt / Dto

## Overview

The `com.optage.kopt.dto` package contains simple data transfer objects used to represent request and response payloads for a **JKK SOD** (Segregation of Duties) operation. These DTOs form the contract boundary for communicating tenant-level service requests and their outcomes through the KOPT module.

## Key Classes and Interfaces

### [JKKSodRequestDTO](src/main/java/com/optage/kopt/dto/JKKSodRequestDTO.java:6)

A lightweight request DTO that captures the minimum information needed to initiate a SOD operation. It holds two fields:

| Field | Type | Purpose |
|-------|------|---------|
| `tenantId` | `String` | Identifies the tenant this request belongs to. |
| `serviceId` | `String` | Identifies the specific service within the tenant that the SOD operation targets. |

The class is a plain Java object with no methods — it carries data only. This is a typical DTO pattern: the object is serialized for transport (e.g., over an HTTP API) and deserialized at the receiving end.

### [JKKSodResponseDTO](src/main/java/com/optage/kopt/dto/JKKSodResponseDTO.java:6)

A lightweight response DTO that carries the result of a SOD operation back to the caller. It holds two fields:

| Field | Type | Purpose |
|-------|------|---------|
| `status` | `String` | A machine-readable status indicator (e.g., `"OK"`, `"ERROR"`, `"PENDING"`). |
| `message` | `String` | A human-readable message providing additional context about the result. |

Like `JKKSodRequestDTO`, this class is a pure data carrier with no logic.

## How It Works

A typical flow looks like this:

1. A caller constructs a `JKKSodRequestDTO` with the desired `tenantId` and `serviceId`.
2. The request DTO is serialized and sent to the KOPT service (e.g., via an API endpoint).
3. The service processes the SOD operation against the specified service.
4. The result is wrapped in a `JKKSodResponseDTO` with a `status` and a `message` and returned to the caller.

```
flowchart TD
    A["Caller"] -->|"JKKSodRequestDTO"| B["KOPT Service"]
    B -->|"JKKSodResponseDTO"| A
```

The design is deliberately minimal — each DTO carries only the fields strictly necessary for its role. There is no nested structure, no validation annotations, and no builder pattern. This keeps the contract lean and easy to serialize/deserialize.

## Data Model

```mermaid
flowchart LR
  A["JKKSodRequestDTO"] --> A1["tenantId: String"]
  A["JKKSodRequestDTO"] --> A2["serviceId: String"]
  B["JKKSodResponseDTO"] --> B1["status: String"]
  B["JKKSodResponseDTO"] --> B2["message: String"]

  A -. "consumed by" .-> B
```

Both classes are plain Java objects. Fields are declared as `private String` and follow standard Java naming conventions. They are intended to be used as-is with standard JSON serialization frameworks (e.g., Jackson, Gson) — the field names map directly to JSON property names.

## Dependencies and Integration

- This package is a leaf module with no child subpackages and no declared internal dependencies.
- `JKKSodRequestDTO` and `JKKSodResponseDTO` exist within the broader `com.optage.kopt` package structure and appear to be used as input/output for SOD-related API endpoints in the KOPT system.
- They are serialized over the wire (likely JSON) and consumed by external callers or downstream KOPT components.

## Notes for Developers

- Both classes are **auto-generated fixtures** for SPEC-SCOPED-WIKI tests. This suggests they may be part of a test harness or scaffolding and could be regenerated by tooling. Avoid adding business logic to them — treat them as data carriers only.
- If you need to extend the request or response schema (e.g., add a `timestamp` to the response), do so by adding new fields to the respective class. Keep the naming consistent with the existing `String` fields.
- No getters, setters, constructors, or `toString`/`equals` implementations are present. Standard JavaBean conventions would apply if you add such methods.
- Since there are no validation annotations or constraints on the fields, input validation (e.g., ensuring `tenantId` and `serviceId` are non-empty) should be handled by the consuming service layer, not within these DTOs.