private String associateFile(Source source, String propertyName) throws Exception {
if (source.hasProperty(propertyName)) {
source.deleteProperty(propertyName);
}
File stats = source.createFileProperty(propertyName);
DataSource ds = dsf.getDataSource(source.getName());
ds.open();
long rc = ds.getRowCount();
ds.close();
FileOutputStream fis = new FileOutputStream(stats);
String rcStr = Long.toString(rc);
fis.write(rcStr.getBytes());
fis.close();
return rcStr;
}
