I am new to annotations and would like to know if its possible to mix annotations with mappings while using inheritance strategies.

For (e.g) if I have a hbm mapping file say A.hbm.xml
Can I extend A and annotate it?

Specifically, can I do something like this:

@Entity
@Table(name="B")
@PrimaryKeyJoinColumn(name=B_id")
public class B extends A
{

@Column(name="newCol", nullable=true, length=50)
private String newCol;
...
}

class A does not have any annotations, just A.hbm

A.hbm:

<class name="com.my.object.A" >
...

<property name="name" column="name" ...>
</class>

Generally can I do something like this for any mapping strategy?

I read this line in the annotations docs and did not quiet understand:
"You cannot mix configuration strategies (hbm vs annotations) in a mapped entity hierarchy either"

Does this mean I cannot do what I am wanting to do?