@Override
public void setConf(Configuration conf) {
try {
TupleMRConfig mrConfig = TupleMRConfig.get(conf);
fieldDeser1 = new SingleFieldDeserializer(conf,mrConfig, type,objectClazz);
fieldDeser2 = new SingleFieldDeserializer(conf,mrConfig, type,objectClazz);
} catch(IOException e) {
throw new RuntimeException(e);
} catch(TupleMRException e) {
throw new RuntimeException(e);