hi all,
I have a setter method of a property like;

setEquipments (List equipments) {
if ( equipments instanceof net.sf.hibernate.collection.Bag)
this.equipments= new ArrayList(equipments);
else this.equipments= equipments;
}

I need to convert to the "bag" to a arrayList because I serialize the data via XStream that cant deserialize the file where list classes are net.sf.hibernate.collection.Bag.( they need to be ArrayList)

I cant use list instead of bag in mapping file because the I have no column to set as an index column for the list . ( No integer column)

When I run a query, hibernate calls the JDBC batch update and gives exception : cannot update ("DB1","AIRCRAFT","AIRCRAFT_ID") to null
(Aircraft is the class that holds list of equipments and Aircraft_id is the many to one column)

I know that such an error is very normal, there must be.

I have an solution that to keep another list independent of database and call its setter.

setEquipments (List equipments) {
this.equipments = equipments
if ( equipments instanceof net.sf.hibernate.collection.Bag)
setArrayListEquipments(new ArrayList(equipments)

}

setArrayListEquipments(List eq) {
this.arrayListEquipments = eq
}

but I wonder whether I can handle all in one setter like the one at the top of the table?!?

use:
hibernate.jdbc.batch_size=0

3.5. Optional configuration properties
hibernate.jdbc.batch_size -- A non-zero value enables use of JDBC2 batch updates by Hibernate. eg. recommended values between 5 and 30

--
Leonid

thanks but need to do that,
I relaized that writing inverse="true" to bag mapping handles this update error.