Question

I have a class and subclasses who extends that.
Like this:

    @Table
    @Entity
    class Cat{



    class DomesticCat extends Cat{
       LitterBox litterBox;

    //getter and setters


    }

    class TigerCat extends Cat{
       HuntingStyle huntingStyle;

    //getter and setters
    }


}

I want to query with hql.

For example i want to find the cat who has “blue” colored LitterBox

should i add @entity and @Table annotations before DomesticCat and TigerCat classes?

There is no column in database for subclass specific fields like litterBox and huntingStyle.

Thanks

Answer 1

@Entity needs to be added for DomesticCat and TigerCat if you want to persist them. You can use the @Inheritance annotation for defining how the subclasses should be mapped – for a single table, use @Inheritance(strategy=SINGLE_TABLE).

@Table will be defaulted if you don’t add it.