TMF637 v5 v4 Product Inventory Management API (Extensible)

For the TMF637 API, extensibility is enabled through Apex lifecycle hooks and customizable GraphQL queries, allowing customers to adjust request and response payloads without compromising TMF compliance. Pre-hooks validate or reshape incoming requests, and post-hooks refine or filter responses for GET (list and retrieve) operations.

Extend the main entity with additional fields
Map a field from a different or related entity
Customize WHERE clauses at the main entity level
Customize WHERE clauses at the sub-resource level
Apply sorting (ORDER BY) on main and sub-resource results

Important
For access methods, prerequisites, and using the API, see TMF637 v4 Product Inventory Management API (Non-Extensible). :::

Assumptions

The customer or integrator implements the pre-hook and post-hook Apex classes and customizes the GraphQL queries based on the provided interfaces and hooks.

Interfaces and Hooks

The following table lists interfaces and corresponding lifecycle hooks supported for customizing the TMF637 operations.

Interface Name	Hooks Supported	Pre-processing Capabilities	GraphQL / Payload Customization	Post-processing Capabilities
IProductInventoryManagementGET	`resolveApexClassName` `transformRequest` `applyCustomValidations` `customiseGraphQLQuery` `setUpdatedPayload`	Validate permissions, enforce access rules, apply business validations	Modify GraphQL query fields, filters, transformations	Refine or enrich API responses