clusteringKey=clusteringKey.replaceAll("[\\(]+","");
clusteringKey=clusteringKey.replaceAll("[\\)]+","");
clusteringKey = clusteringKey.trim();
clusteringKey=clusteringKey.replaceAll("[\\(]+","");
clusteringKey=clusteringKey.replaceAll("[\\)]+","");
clusteringKey = clusteringKey.trim();