Hibernate lazy-load transient fields

Hibernate lazy-load transient fields

I expect that this is an unusual use-case.
Say I have a entity class Foo:
@Entity
public class Foo {
@Id
private Long id;
private String bar;
@Transient
private long bazz;
...
}
I also have an Interceptor defined such that Foo.bazz is initialized when
instances of Foo are read from the database:
public class MyInterceptor extends EmptyInterceptor {
...
@Override
public boolean onLoad(
Object entity,
Serializable id,
Object[] state,
String[] propertyNames,
Type[] types) {
if(entity instanceof Foo) {
Foo foo = (Foo)entity;
long bazzValue = ... // some very heavyweight code
foo.setBazz(bazzValue);
}
return false;
}
So far, so good. But not all code paths will need the value of every Foo
instance's bazz field. This means that the heavyweight code to find a
value for each and every instance of Foo is sometimes needlessly invoked.
How do I go about avoiding invoking the code to find a value for bazz
unless Foo.getBazz() is actually invoked?