Hi,

I have the table 'Attribute' that contains the entity_id and entity_type_id, the entity can be 'Product' or 'Category' (product or category may have many attributes). The entity_id is referred to the product_id or category_id, and the entity_type_id referred to 'Entity_Type' table. How can I map this association. Look like I have to use the 'any' mapping, does anyone has the experience on this? How can I get the attributes from the product or category, and insert the attributes when insert the product or category (cascade save)?

Any help would appreciate!
Thanks

You'll want to look into inheritance mapping with Hibernate and JPA. Here's a little tutorial on mapping inheritance hierarchies:

http://jpa.ezhibernate.com/Javacode/learn.jsp?tutorial=16mappinginheritancewithjpa

When you get your object model mapped, then take a look at performing polymorphic queries with Hibernate.