Program: 136642
Project: 136642
Buggy source:
/** 
 * if the DriverClassName is empty or Jar File Path is invalid return false.
 * @param dbConn a General JDBC database connection
 * @return
 * @throws MalformedURLException
 */
public static ReturnCode checkGeneralJdbcJarFilePathDriverClassName(DatabaseConnection dbConn) throws MalformedURLException {
  ReturnCode returnCode=new ReturnCode();
  String driverClass=JavaSqlFactory.getDriverClass(dbConn);
  String driverJarPath=JavaSqlFactory.getDriverJarPath(dbConn);
  if (driverClass == null || driverClass.trim().equals("String_Node_Str")) {
    returnCode.setOk(false);
    returnCode.setMessage(Messages.getString("String_Node_Str"));
  }
 else {
    if (driverJarPath == null || driverJarPath.trim().equals("String_Node_Str")) {
      returnCode.setOk(false);
      returnCode.setMessage(Messages.getString("String_Node_Str"));
    }
 else {
      List<String> driverJarNameList=new ArrayList<String>();
      String[] splits=driverJarPath.split("String_Node_Str");
      for (      String str : splits) {
        if (!StringUtils.isBlank(str)) {
          driverJarNameList.add(str);
        }
      }
      LinkedList<String> driverJarRealPaths=getDriverJarRealPaths(driverJarNameList);
      for (      String str : driverJarRealPaths) {
        File jarFile=new File(str);
        if (!jarFile.exists() || jarFile.isDirectory()) {
          returnCode.setOk(false);
          returnCode.setMessage(Messages.getString("String_Node_Str"));
          break;
        }
      }
    }
  }
  return returnCode;
}

Fixed version (ground truth):
/** 
 * if the DriverClassName is empty or Jar File Path is invalid return false.
 * @param dbConn a General JDBC database connection
 * @return
 * @throws MalformedURLException
 */
public static ReturnCode checkGeneralJdbcJarFilePathDriverClassName(DatabaseConnection dbConn) throws MalformedURLException {
  ReturnCode returnCode=new ReturnCode();
  String driverClass=JavaSqlFactory.getDriverClass(dbConn);
  String driverJarPath=JavaSqlFactory.getDriverJarPath(dbConn);
  if (driverClass == null || driverClass.trim().equals("String_Node_Str")) {
    returnCode.setOk(false);
    returnCode.setMessage(Messages.getString("String_Node_Str"));
  }
 else {
    if (driverJarPath == null || driverJarPath.trim().equals("String_Node_Str")) {
      returnCode.setOk(false);
      returnCode.setMessage(Messages.getString("String_Node_Str"));
    }
 else {
      List<String> driverJarNameList=new ArrayList<String>();
      String[] splits=driverJarPath.split("String_Node_Str");
      for (      String str : splits) {
        if (!StringUtils.isBlank(str)) {
          driverJarNameList.add(str);
        }
      }
      LinkedList<String> driverJarRealPaths=getDriverJarRealPaths(driverJarNameList);
      if (driverJarRealPaths.isEmpty()) {
        returnCode.setOk(false);
        returnCode.setMessage(Messages.getString("String_Node_Str"));
      }
      for (      String str : driverJarRealPaths) {
        File jarFile=new File(str);
        if (!jarFile.exists() || jarFile.isDirectory()) {
          returnCode.setOk(false);
          returnCode.setMessage(Messages.getString("String_Node_Str"));
          break;
        }
      }
    }
  }
  return returnCode;
}