/**
* INTERNAL: Retrieve the target object's primary key value that is mapped to a given source xpath
* (in the source-target key field association list).
*
* @param targetObject - the reference class instance that holds the required pk value
* @param xmlFld
* @param session
* @return null if the target object is null, the reference class is null, or a primary key field
* name does not exist on the reference descriptor that matches the target field name -
* otherwise, return the associated primary key value
*/
public Object buildFieldValue(Object targetObject, XMLField xmlFld, AbstractSession session) {
if (targetObject == null || getReferenceClass() == null) {
return null;
}
ClassDescriptor descriptor = getReferenceDescriptor();
ObjectBuilder objectBuilder = descriptor.getObjectBuilder();
Vector pks = objectBuilder.extractPrimaryKeyFromObject(targetObject, session);
XMLField tgtXMLField = (XMLField) getSourceToTargetKeyFieldAssociations().get(xmlFld);
int idx = descriptor.getPrimaryKeyFields().indexOf(tgtXMLField);
if (idx == -1) {
return null;
}
return pks.get(idx);
}
