//******************************************************************************************************//  DeviceStatistics.cs - Gbtc////  Copyright © 2014, Grid Protection Alliance.  All Rights Reserved.////  Licensed to the Grid Protection Alliance (GPA) under one or more contributor license agreements. See//  the NOTICE file distributed with this work for additional information regarding copyright ownership.//  The GPA licenses this file to you under the MIT License (MIT), the "License"; you may//  not use this file except in compliance with the License. You may obtain a copy of the License at:////      http://www.opensource.org/licenses/MIT////  Unless agreed to in writing, the subject software distributed under the License is distributed on an//  "AS-IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. Refer to the//  License for the specific language governing permissions and limitations.////  Code Modification History://  ----------------------------------------------------------------------------------------------------//  02/13/2014 - Stephen C. Wills//       Generated original version of source code.////****************************************************************************************************** namespace GSF.TimeSeries.Statistics{    class DeviceStatistics    {        /// <summary>        /// Calculates number of data quality errors reported by device during last reporting interval.        /// </summary>        /// <param name="source">Source Device.</param>        /// <param name="arguments">Any needed arguments for statistic calculation.</param>        /// <returns>Data Quality Errors Statistic.</returns>        private static double GetDeviceStatistic_DataQualityErrors(object source, string arguments)        {            double statistic = 0.0D;            IDevice device = source as IDevice;             if ((object)device != null)                statistic = s_statisticValueCache.GetDifference(device, device.DataQualityErrors, "DataQualityErrors");             return statistic;        }         /// <summary>        /// Calculates number of time quality errors reported by device during last reporting interval.        /// </summary>        /// <param name="source">Source Device.</param>        /// <param name="arguments">Any needed arguments for statistic calculation.</param>        /// <returns>Time Quality Errors Statistic.</returns>        private static double GetDeviceStatistic_TimeQualityErrors(object source, string arguments)        {            double statistic = 0.0D;            IDevice device = source as IDevice;             if ((object)device != null)                statistic = s_statisticValueCache.GetDifference(device, device.TimeQualityErrors, "TimeQualityErrors");             return statistic;        }         /// <summary>        /// Calculates number of device errors reported by device during last reporting interval.        /// </summary>        /// <param name="source">Source Device.</param>        /// <param name="arguments">Any needed arguments for statistic calculation.</param>        /// <returns>Device Errors Statistic.</returns>        private static double GetDeviceStatistic_DeviceErrors(object source, string arguments)        {            double statistic = 0.0D;            IDevice device = source as IDevice;             if ((object)device != null)                statistic = s_statisticValueCache.GetDifference(device, device.DeviceErrors, "DeviceErrors");             return statistic;        }         /// <summary>        /// Calculates number of measurements received from device during last reporting interval.        /// </summary>        /// <param name="source">Source Device.</param>        /// <param name="arguments">Any needed arguments for statistic calculation.</param>        /// <returns>Measurements Received Statistic.</returns>        private static double GetDeviceStatistic_MeasurementsReceived(object source, string arguments)        {            double statistic = 0.0D;            IDevice device = source as IDevice;             if ((object)device != null)                statistic = s_statisticValueCache.GetDifference(device, device.MeasurementsReceived, "MeasurementsReceived");             return statistic;        }         /// <summary>        /// Calculates expected number of measurements received from device during last reporting interval.        /// </summary>        /// <param name="source">Source Device.</param>        /// <param name="arguments">Any needed arguments for statistic calculation.</param>        /// <returns>Measurements Expected Statistic.</returns>        private static double GetDeviceStatistic_MeasurementsExpected(object source, string arguments)        {            double statistic = 0.0D;            IDevice device = source as IDevice;             if ((object)device != null)                statistic = s_statisticValueCache.GetDifference(device, device.MeasurementsExpected, "MeasurementsExpected");             return statistic;        }         private static readonly StatisticValueStateCache s_statisticValueCache = new StatisticValueStateCache();    }}