//******************************************************************************************************//  ChannelMetadata.cs - Gbtc////  Copyright © 2010, 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://  ----------------------------------------------------------------------------------------------------//  06/19/2013 - J. Ritchie Carroll//       Generated original version of source code.////****************************************************************************************************** using System.Collections.Generic;using GSF.Units.EE; namespace GSF.COMTRADE{    /// <summary>    /// Defines a minimal set of channel metadata for a COMTRADE config file.    /// </summary>    public struct ChannelMetadata    {        /// <summary>        /// Channel name.        /// </summary>        public string Name;         /// <summary>        /// Channel signal type.        /// </summary>        public SignalType SignalType;         /// <summary>        /// Determines if channel is a digital.        /// </summary>        /// <remarks>        /// Channel is assumed to be an analog if field is <c>false</c>.        /// </remarks>        public bool IsDigital;    }     /// <summary>    /// Defines a comparison class to property sort metadata.    /// </summary>    public class ChannelMetadataSorter : IComparer<ChannelMetadata>    {        /// <summary>        /// Compares one metadata record to another.        /// </summary>        /// <param name="left">Left metadata record to compare.</param>        /// <param name="right">Right metadata record to compare.</param>        /// <returns>Comparison sort order of metadata record.</returns>        public int Compare(ChannelMetadata left, ChannelMetadata right)        {            int leftIndex, rightIndex;             // Make sure digitals (status flags first) fall behind analogs. All            // values not in the dictionary will return 0 thus sorting higher.            s_sortOrder.TryGetValue(left.SignalType, out leftIndex);            s_sortOrder.TryGetValue(right.SignalType, out rightIndex);             return leftIndex.CompareTo(rightIndex);        }         /// <summary>        /// Default instance of the metadata record sorter.        /// </summary>        public static readonly ChannelMetadataSorter Default;         private static readonly Dictionary<SignalType, int> s_sortOrder;         static ChannelMetadataSorter()        {            int index = 1;             // Define proper sort order for key signal types. Status flags are types of digital fields, but            // they are stored as a 32-bit value with an abstracted set of flags (high order) as well as the            // original flags (low order), since they are greater than 16-bits they are defined in the historian            // as an analog value. Even so they need to sort as a digital.            s_sortOrder = new Dictionary<SignalType, int>            {                {SignalType.FLAG, index++},  // Status Flags                {SignalType.DIGI, index}     // Digital Value            };             Default = new ChannelMetadataSorter();        }    }}