Datasource ds = null;
DatasourceFilter dsFilter;
Collection<CRResolvableBean> collection = null;
if (request != null) {
RequestWrapper rW = request.getRequestWrapper();
String rootId = rW.getParameter(ROOT_ID);
// Parse the given expression and create a datasource filter
try {
ds = this.config.getDatasource();
if (ds == null) {
throw (new DatasourceException("No Datasource available."));