Enterprise bean deployment tool schema

 

There are three options for mapping entity beans to a backend database schema:

1. top-down

   The deployment tools generate a backend schema directly from the provided abstract persistence schema (abstract accessor methods plus the deployment descriptor elements) and then map the elements in the abstract persistence schema to the generated backend schema.

2. meet-in-the-middle

   One employs a tool to manually map elements from the abstract persistence schema to elements in an existing backend schema. WSAD provides a meet-in-the-middle mapping tool.

3. bottom-up

   The tools take as input an existing backend database schema and generate equivalent entity beans and then map the elements of the two schemas.

For more info, see the WSAD documentation.