Required: Inventory Selection Function in Opentaps ERP

We work on Opentaps ERP and Application development framework. Our requirement is to modify the Inventory selection function which operates on logics such as FIFO, LIFO, and so on. Opentaps does not provide a user override in inventory selection process. We want our users to be able to override the inventory which is selected from FIFO, LIFO and so on.

In a UI user will get to see a list of available inventory lots from multiple warehouses with a facility to select the required lot.

Desired Skills are AJAX, HTML, Java EE and Spring