Dynamically create table and java classes at runtime

Question

I have a requirement in my application. My tables wont be defined beforehand.For Example,if the user creates a form by name Student,and adds its attributes like name,roll n

Answer 1

Hibernate supports dynamic models, that is, entities that are defined at run-time, but you have to write out a mapping file. You should note a couple things about dynamic models:

1. You may be restricted in how you define these at run-time (viz. you will have to use the Session directly instead of using a helper method from HibernateTemplate or something like that).

2. Dynamic models are supported using Maps as the container for the fields of an entity, so you will lose typing and a POJO-style API at run-time (without doing something beyond the baked-in dynamic model support).

All of that said, you didn't mention whether it was a requirement that the dynamically defined tables be persistent across application sessions. That could complicate things, potentially.