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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: sw=2 ts=2 sts=2 expandtab 
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "nsISupports.idl"

interface mozIStorageResultSet;
interface mozIStorageError;

[scriptable, uuid(29383d00-d8c4-4ddd-9f8b-c2feb0f2fcfa)]
interface mozIStorageStatementCallback : nsISupports {

  /**
   * Called when some result is obtained from the database.  This function can
   * be called more than once with a different storageIResultSet each time for
   * any given asynchronous statement.
   *
   * @param aResultSet
   *        The result set containing the data from the database.
   */
  void handleResult(in mozIStorageResultSet aResultSet);

  /**
   * Called when some error occurs while executing the statement.  This function
   * may be called more than once with a different storageIError each time for
   * any given asynchronous statement.
   *
   * @param aError
   *        An object containing information about the error.
   */
  void handleError(in mozIStorageError aError);

  /**
   * Called when the statement has finished executing.  This function will only
   * be called once for any given asynchronous statement.
   *
   * @param aReason
   *        Indicates if the statement is no longer executing because it either
   *        finished (REASON_FINISHED), was canceled (REASON_CANCELED), or
   *        a fatal error occurred (REASON_ERROR).
   */
  const unsigned short REASON_FINISHED = 0;
  const unsigned short REASON_CANCELED = 1;
  const unsigned short REASON_ERROR = 2;
  void handleCompletion(in unsigned short aReason);
};