@Override
public List<BlobInfoDTO> load(String filterStr) throws YaacException {
// step 1 : parse query
String strQuery = "select * from " + Blobstore.BLOB_INFO_KIND + " " + filterStr;
GqlQuery gql = new GqlQuery(strQuery);
Query query = gql.query();
logger.info("loading blobs, filter = " + filterStr);
logger.info("parsed query = " + strQuery);
// step 2 : validate query