// Some comments here
@Entity
@Inheritance(strategy = InheritanceType.SINGLE_TABLE)
@DiscriminatorColumn(name = "TYPE")
public abstract class BaseClass {
    private String baseClassProperty;
}

@Entity
@DiscriminatorValue(value = "A")
public class SubClassA extends BaseClass {
   private String subClassAProperty;
   
   // further properties and methods ...
}

@Entity
@DiscriminatorValue(value = "B")
public class SubClassB extends BaseClass {
   private String subClassBProperty;

   // further properties and methods ...
}

// from a e.g. test and having multiple corresponding documents in the DB, the following query will return the proper objects, but the subClass*Property will be null in all cases.

final TypedQuery<BaseClass> query = manager.createQuery("SELECT d FROM BaseClass b WHERE b.baseClassProperty='some value'", BaseClass.class);