How to convert CriteriaQuery and NativeSearchQuery to raw ES query JSON?

My requirement is serviceA->serviceB->ES.

service-A a building a query by the JSON of CriteriaQuery or NativeSearchQuery and send this query request by HTTP to service-B, then service-B will query ElasticSearch by the received request.

So what I want is service-A build query by CriteriaQuery or NativeSearchQuery which is more user-friendly than raw ES query. On service-B, we receive the request then query ES by StringQuery

I only find this but it doesn’t help. https://discuss.elastic.co/t/convert-searchsourcebuilder-to-json/156118

[sothawo]

We won’t expose ES raw queries, even if we would build them which we don’t. Spring Data is about hiding away store specific implementation details, not exposing them.

[ToffeeLu]

So what spring did is CriteriaQuery -> SearchRequest -> ES lib -> ES service

We decide to create a customized simple query API contract for service A to use, and we convert it to NativeSearchQuery then send it to ES through Spring lib.

Thanks again. If I found more thing on serialization or deserialization about ES raw query, I will discuss with you and may contribute for converting in future.