Using different entities in the same service call

Hi,

I have scenario where I have to fetch data from the DB based on some filter criteria.

The data I have to fetch is taken from a PLAN table and the fields that I have to fetch are PLAN_ID, PLAN_DESCRIPTION, PLAN_START_DATE,PLAN_END_DATE etc.The filter criteria I pass contains fields like MANDT,USER_ID,LANG_ID,SEARCH.

Now I have created a project where I have 2 entities.

FILTER and PLAN with their respective fields.

Since my filter is large and I will not know the length of the filter at runtime im choosing to POST it as payload instead of passing it as $filter in my GET url.

So when I use the POST method and pass the filter the create entity method gets invoked.So I have written my code inside this method where I fetch the plan details using the filter.

Now is there a way I can return my plan details in the same method? 

I tried making my ER_ENTITY point to the plan structure instead of the Filter structure.

At runtime in the debug mode it does hold the plan details but when I test in the gateway client I can see only an empty filter as the response.

Can anyone let me know if we can pass one entity structure as request and return another as response?