Enable HDL via REST in the HCM Adapter for OIC

We recently had to change our Integration HDL setup from SOAP to REST as a result of the following idea: Enable private SOAP connections from OIC to Oracle SaaS.

Following the guidance in the official documentation — HDL via REST Tutorial — we successfully implemented the integration using REST.

However, from an OIC perspective, we would have expected the HCM Adapter to already follow this best practice, as Oracle generally recommends using product-specific adapters over generic REST connectors.

Current Limitation:

• The HCM Adapter currently only supports HDL via SOAP/WSDL.
• Due to security constraints (as outlined in this discussion), SOAP is no longer a viable option for us.