Program: 74626
Project: 74626
Buggy source:
/** 
 * Tests whether the given connection properties can be used to obtain a connection.
 * @param driverClassName the name of driver class
 * @param connectionString the JDBC driver connection URL
 * @param jndiNameUrl   the JNDI name to look up a Data Source name service; may be null or empty
 * @param userId        the login user id
 * @param password      the login password
 * @return  true if the the specified properties are valid to obtain a connection;false otherwise
 * @throws OdaException 
 */
public boolean testConnection(String driverClassName,String connectionString,String jndiNameUrl,String userId,String password) throws OdaException {
  boolean canConnect=false;
  try {
    if (getDriverConnectionFactory(driverClassName) != null) {
      tryCreateConnection(driverClassName,connectionString,userId,password);
      return true;
    }
    if (jndiNameUrl != null) {
      Connection jndiDSConnection=getJndiDSConnection(driverClassName,jndiNameUrl,addUserAuthenticationProperties(null,userId,password));
      if (jndiDSConnection != null) {
        closeConnection(jndiDSConnection);
        return true;
      }
 else {
        throw new JDBCException(ResourceConstants.CANNOT_PARSE_JNDI,null);
      }
    }
    loadAndRegisterDriver(driverClassName,null);
    if (cachedDriversMap.get(driverClassName) == null) {
      Enumeration enumeration=DriverManager.getDrivers();
      while (enumeration.hasMoreElements()) {
        Driver driver=(Driver)enumeration.nextElement();
        if (isExpectedDriver(driver,driverClassName)) {
          if (driver.acceptsURL(connectionString)) {
            cachedDriversMap.put(driverClassName,driver);
            tryCreateConnection(driverClassName,connectionString,userId,password);
            canConnect=true;
            break;
          }
        }
      }
      if (!canConnect)       throw new JDBCException(ResourceConstants.CANNOT_PARSE_URL,null);
    }
 else {
      if (((Driver)this.cachedDriversMap.get(driverClassName)).acceptsURL(connectionString)) {
        tryCreateConnection(driverClassName,connectionString,userId,password);
        canConnect=true;
      }
    }
  }
 catch (  SQLException e) {
    throw new JDBCException(e.getLocalizedMessage(),null);
  }
  if (canConnect == false)   throw new JDBCException(ResourceConstants.NO_SUITABLE_DRIVER,null);
  return true;
}

Fixed version (ground truth):
/** 
 * Tests whether the given connection properties can be used to obtain a connection.
 * @param driverClassName the name of driver class
 * @param connectionString the JDBC driver connection URL
 * @param jndiNameUrl   the JNDI name to look up a Data Source name service; may be null or empty
 * @param userId        the login user id
 * @param password      the login password
 * @return  true if the the specified properties are valid to obtain a connection;false otherwise
 * @throws OdaException 
 */
public boolean testConnection(String driverClassName,String connectionString,String jndiNameUrl,String userId,String password) throws OdaException {
  boolean canConnect=false;
  try {
    if (getDriverConnectionFactory(driverClassName) != null) {
      tryCreateConnection(driverClassName,connectionString,userId,password);
      return true;
    }
    if (jndiNameUrl != null) {
      Connection jndiDSConnection=getJndiDSConnection(driverClassName,jndiNameUrl,addUserAuthenticationProperties(null,userId,password));
      if (jndiDSConnection != null) {
        closeConnection(jndiDSConnection);
        return true;
      }
 else       if (connectionString != null && connectionString.trim().length() > 0) {
        return testConnection(driverClassName,connectionString,userId,password);
      }
 else {
        throw new JDBCException(ResourceConstants.CANNOT_PARSE_JNDI,null);
      }
    }
    loadAndRegisterDriver(driverClassName,null);
    if (cachedDriversMap.get(driverClassName) == null) {
      Enumeration enumeration=DriverManager.getDrivers();
      while (enumeration.hasMoreElements()) {
        Driver driver=(Driver)enumeration.nextElement();
        if (isExpectedDriver(driver,driverClassName)) {
          if (driver.acceptsURL(connectionString)) {
            cachedDriversMap.put(driverClassName,driver);
            tryCreateConnection(driverClassName,connectionString,userId,password);
            canConnect=true;
            break;
          }
        }
      }
      if (!canConnect)       throw new JDBCException(ResourceConstants.CANNOT_PARSE_URL,null);
    }
 else {
      if (((Driver)this.cachedDriversMap.get(driverClassName)).acceptsURL(connectionString)) {
        tryCreateConnection(driverClassName,connectionString,userId,password);
        canConnect=true;
      }
    }
  }
 catch (  SQLException e) {
    throw new JDBCException(e.getLocalizedMessage(),null);
  }
  if (canConnect == false)   throw new JDBCException(ResourceConstants.NO_SUITABLE_DRIVER,null);
  return true;
}