storage/src/mozStorageResultSet.cpp
author Jan Varga <jan.varga@gmail.com>
Tue, 26 Mar 2013 12:13:17 +0100
changeset 136642 8d558e07caf4c6f9ef6660f2000f54754894e814
parent 98529 f4157e8c410708d76703f19e4dfb61859bfe32d8
child 151904 bf72f0094528d9f4546030da46e9d86d2444d973
permissions -rw-r--r--
Bug 767944 - Implement a manager for centralized quota and storage handling. r=bent

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
 * vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ :
 * 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 "mozStorageRow.h"
#include "mozStorageResultSet.h"

namespace mozilla {
namespace storage {

////////////////////////////////////////////////////////////////////////////////
//// ResultSet

ResultSet::ResultSet()
: mCurrentIndex(0)
{
}

ResultSet::~ResultSet()
{
  mData.Clear();
}

nsresult
ResultSet::add(mozIStorageRow *aRow)
{
  return mData.AppendObject(aRow) ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
}

/**
 * Note:  This object is only ever accessed on one thread at a time.  It it not
 *        threadsafe, but it does need threadsafe AddRef and Release.
 */
NS_IMPL_THREADSAFE_ISUPPORTS1(
  ResultSet,
  mozIStorageResultSet
)

////////////////////////////////////////////////////////////////////////////////
//// mozIStorageResultSet

NS_IMETHODIMP
ResultSet::GetNextRow(mozIStorageRow **_row)
{
  NS_ENSURE_ARG_POINTER(_row);

  if (mCurrentIndex >= mData.Count()) {
    // Just return null here
    return NS_OK;
  }

  NS_ADDREF(*_row = mData.ObjectAt(mCurrentIndex++));
  return NS_OK;
}

} // namespace storage
} // namespace mozilla