try {
cve.open();
cpe.open(cve);
} catch (IndexException ex) {
throw new NoDataException(ex.getMessage(), ex);
} catch (DatabaseException ex) {
throw new NoDataException(ex.getMessage(), ex);
} finally {
cve.close();
}
if (cpe.numDocs() <= 0) {
cpe.close();
throw new NoDataException("No documents exist");
}
}