Map complicated queries to attributes?

Question

OK, well, I have a class which has a 1-many mapping. the queries for this are getting kinda complicated and I'm wondering if I can essesntially map the subqueries to a java property on the parent class.
In other words I have class A mapped one to many descriptor b.
I have several values for class b (call them 1,2,3). Sometimes, I need to know if something has a 2 but no threes. Sometimes I need to know if it has a 1 entry, but no 2s, etc. Some of these involve SQL subqueries. I'm wondering If I can map it to a propery in the java class and kind of "preMap" the sql/conditions to get certain status (i.e. a single property which returns-- this is read only -- it's 1, but no 2s, 2 but no 3s, etc.).
Is this possible? Should I use named queries and pre-build them that way? Any advice would be appreciated.

Answer 1

A bit more brute force... I.e.,
public class A {
public Collection b;
public Collection b1;
public Collection b2;
public void addB(B aB) {
aB.setOwner(a);
b.add(aB);
if(aB.value() = 1) b1.add(aB);
if(aB.value() = 2) b2.add(aB);
Of course, this is not a good idea if you have a lot of these different values, but given you were asking if you could somehow map them to a query, this doesn't seem that unreasonable...
- Don