public String read(Env env, int length)
public Object read(Env env, long length)
  public String read(Env env,                     int length)  {    try {      switch (_type) {      case OracleModule.OCI_D_FILE:        break;      case OracleModule.OCI_D_LOB:        if (_lob instanceof Clob) {          return readInternalClob(env, length);        }        break;      case OracleModule.OCI_D_ROWID:        break;      }    } catch (Exception ex) {      log.log(Level.FINE, ex.toString(), ex);    }    return null;  }