Best approach to expose custom database objects/functionality as Rest service, to consume in VBCS

Summary

Best approach to expose custom database objects/functionality as Rest service, to consume in VBCS

Content

Experts,

We need your help in identifying the best option to expose the custom database objects or custom functionality as a Rest service which can be consumed in VBCS application.

1. ADF BC Rest - We don't have JCS at moment but if its best option we can get back to customer.
2. OIC Integrations as Rest - Already subscribed along with VBCS
3. ORDS - We have custom database of size 15gb 

FYI, we have already developed an application which is in production now, where we used Oracle JET and ADB BC combination for another customer.