public Collection getRootNodes() { Collection treeList = null; if (StringUtils.isEmpty(idElementoForSubtree)) { List custodyArchiveList = serviceClient.getCustodyArchiveList(); treeList = gestionSalasConsultaBI.getEdificiosByIdsArchivo( (ArrayUtils.toString(custodyArchiveList.toArray()))); } else { treeList = new ArrayList(); treeList.add(gestionSalasConsultaBI.getEdificioById(idElementoForSubtree)); } return treeList; }