private String findDriverByUrlImpl(String url) {
    for (int i = 0; i < _driverList.size(); i++) {
      try {
        Driver driver = (Driver) _driverList.get(i);

        if (driver.acceptsURL(url)) return driver.getClass().getName();
      } catch (Exception e) {
        log.log(Level.FINE, e.toString(), e);
      }
    }

    return null;
  }
  /**
   * Fires a new connection event on all listeners.
   *
   * @param closed <code>true</code> if <code>close</code> has been called on the connection; <code>
   *     false</code> if the <code>sqlException</code> represents an error where the connection may
   *     not longer be used.
   * @param sqlException the SQLException to pass to the listeners
   */
  public synchronized void fireConnectionEvent(boolean closed, SQLException sqlException) {
    if (_listeners.size() > 0) {
      ConnectionEvent connectionEvent = new ConnectionEvent(this, sqlException);
      Iterator iterator = _listeners.iterator();

      while (iterator.hasNext()) {
        ConnectionEventListener listener = (ConnectionEventListener) iterator.next();

        if (closed) {
          listener.connectionClosed(connectionEvent);
        } else {
          listener.connectionErrorOccurred(connectionEvent);
        }
      }
    }
  }
  /**
   * Fires a new connection event on all listeners.
   *
   * @param closed <code>true</code> if <code>close</code> has been called on the connection; <code>
   *     false</code> if the <code>sqlException</code> represents an error where the connection may
   *     not longer be used.
   * @param sqlException the SQLException to pass to the listeners
   */
  public synchronized void fireConnectionEvent(boolean closed, SQLException sqlException) {
    if (listeners.size() > 0) {
      ConnectionEvent connectionEvent = new ConnectionEvent(this, sqlException);
      Iterator iterator = listeners.iterator();

      while (iterator.hasNext()) {
        ConnectionEventListener listener = (ConnectionEventListener) iterator.next();

        if (closed) {
          listener.connectionClosed(connectionEvent);
        } else {
          try {
            if (connection == null || connection.isClosed()) {
              listener.connectionErrorOccurred(connectionEvent);
            }
          } catch (SQLException ex) {
            // Will never occur
          }
        }
      }
    }
  }