if (isJoining() && isJDBC) {
attMapping = new JoiningNestedAttributeMapping(idExpression, sourceExpression,
targetXPathSteps, isMultiValued, clientProperties, elementExpr,
sourceFieldSteps, namespaces);
} else {
attMapping = new NestedAttributeMapping(idExpression, sourceExpression,
targetXPathSteps, isMultiValued, clientProperties, elementExpr,
sourceFieldSteps, namespaces);
}
} else {