//******************************************************************************************************//  FrequencyValue.cs - Gbtc////  Copyright © 2012, 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://  ----------------------------------------------------------------------------------------------------//  04/27/2009 - J. Ritchie Carroll//       Generated original version of source code.//  09/15/2009 - Stephen C. Wills//       Added new header and license agreement.//  12/17/2012 - Starlynn Danyelle Gilliam//       Modified Header.////****************************************************************************************************** using System;using System.Runtime.Serialization; namespace GSF.PhasorProtocols.SelFastMessage{    /// <summary>    /// Represents the SEL Fast Message implementation of a <see cref="IFrequencyValue"/>.    /// </summary>    [Serializable]    public class FrequencyValue : FrequencyValueBase    {        #region [ Constructors ]         /// <summary>        /// Creates a new <see cref="FrequencyValue"/>.        /// </summary>        /// <param name="parent">The <see cref="IDataCell"/> parent of this <see cref="FrequencyValue"/>.</param>        /// <param name="frequencyDefinition">The <see cref="IFrequencyDefinition"/> associated with this <see cref="FrequencyValue"/>.</param>        public FrequencyValue(IDataCell parent, IFrequencyDefinition frequencyDefinition)            : base(parent, frequencyDefinition)        {        }         /// <summary>        /// Creates a new <see cref="FrequencyValue"/> from specified parameters.        /// </summary>        /// <param name="parent">The <see cref="DataCell"/> parent of this <see cref="FrequencyValue"/>.</param>        /// <param name="frequencyDefinition">The <see cref="FrequencyDefinition"/> associated with this <see cref="FrequencyValue"/>.</param>        /// <param name="frequency">The floating point value that represents this <see cref="FrequencyValue"/>.</param>        /// <param name="dfdt">The floating point value that represents the change in this <see cref="FrequencyValue"/> over time.</param>        public FrequencyValue(DataCell parent, FrequencyDefinition frequencyDefinition, double frequency, double dfdt)            : base(parent, frequencyDefinition, frequency, dfdt)        {        }         /// <summary>        /// Creates a new <see cref="FrequencyValue"/> from serialization parameters.        /// </summary>        /// <param name="info">The <see cref="SerializationInfo"/> with populated with data.</param>        /// <param name="context">The source <see cref="StreamingContext"/> for this deserialization.</param>        protected FrequencyValue(SerializationInfo info, StreamingContext context)            : base(info, context)        {        }         #endregion         #region [ Properties ]         /// <summary>        /// Gets or sets the <see cref="DataCell"/> parent of this <see cref="FrequencyValue"/>.        /// </summary>        public new virtual DataCell Parent        {            get => base.Parent as DataCell;            set => base.Parent = value;        }         /// <summary>        /// Gets or sets the <see cref="FrequencyDefinition"/> associated with this <see cref="FrequencyValue"/>.        /// </summary>        public new virtual FrequencyDefinition Definition        {            get => base.Definition as FrequencyDefinition;            set => base.Definition = value;        }         /// <summary>        /// Gets the length of the <see cref="BodyImage"/>.        /// </summary>        /// <remarks>        /// The SEL Fast Message protocol provides frequency and df/dt as optional data measurements, so we override        /// the default behavior to account for this change in operation.        /// </remarks>        protected override int BodyLength => 4;         /// <summary>        /// Gets the binary body image of the <see cref="FrequencyValue"/> object.        /// </summary>        protected override byte[] BodyImage => BigEndian.GetBytes((float)Frequency);     #endregion         #region [ Methods ]         /// <summary>        /// Parses the binary body image.        /// </summary>        /// <param name="buffer">Binary image to parse.</param>        /// <param name="startIndex">Start index into <paramref name="buffer"/> to begin parsing.</param>        /// <param name="length">Length of valid data within <paramref name="buffer"/>.</param>        /// <returns>The length of the data that was parsed.</returns>        protected override int ParseBodyImage(byte[] buffer, int startIndex, int length)        {            Frequency = BigEndian.ToSingle(buffer, startIndex);            return 4;        }         #endregion         #region [ Static ]         // Static Methods         // Delegate handler to create a new SEL Fast Message frequency value        internal static IFrequencyValue CreateNewValue(IDataCell parent, IFrequencyDefinition definition, byte[] buffer, int startIndex, out int parsedLength)        {            IFrequencyValue frequency = new FrequencyValue(parent, definition);             parsedLength = frequency.ParseBinaryImage(buffer, startIndex, 0);             return frequency;        }         #endregion    }}