Transparent Collection Indirection ,unexpected behavior

Question

I use tried to use Transparent Collection with 1-M mapping.
oracle.toplink.indirection.IndirectList is default workbench generate Collection class , in my test project a Dpartment contain many Employees ,so code fragment in my java project class is
employeeCollectionMapping.useTransparentCollection();     
     employeeCollectionMapping.useCollectionClass(oracle.toplink.indirection.IndirectList.class);
     employeeCollectionMapping.addTargetForeignKeyFieldName("EMPLOYEE.DEPT_ID", "DEPARTMENT.DEPT_ID");
     descriptor.addMapping(employeeCollectionMapping);
and in Department Class
public class Department
     private java.lang.Double deptId;
     private java.lang.String deptName;
     private java.util.Collection employeeCollection= new IndirectList();
but when I query a Department Toplink alway generate SQL for retrive Employees ..
What is the importance point for implement Transparent Collection ?
but, I successfully implement 1-1 Indirection with ValueHolder
Thank you,
Kowit Laison

Answer 1

This definitely should not happen. You should not see the query executed for the relationship until it is accessed. Make sure that you are not accessing the collection by mistake, such as using a set method in the mapping that sends a message to the collection.
If you are having trouble finding where the collection is being access you can add a SessionEventListener to the session and dump the stack when a query is executed.
In general you do not need to initialize your variable to the indirect collection, you can just use ArrayList or any other List type.
>>
private java.util.Collection employeeCollection= new IndirectList();
just needprivate java.util.Collection employeeCollection= new ArrrayList();