//******************************************************************************************************//  Frame.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://  ----------------------------------------------------------------------------------------------------//  09/02/2010 - J. Ritchie Carroll//       Generated original version of source code.//  04/14/2011 - J. Ritchie Carroll//       Added received and published timestamps for measurements.//  05/11/2011 - J. Ritchie Carroll//       Updated to use a concurrent dictionary.//  12/20/2012 - Starlynn Danyelle Gilliam//       Modified Header.////****************************************************************************************************** using System;using System.Collections.Concurrent;using System.Collections.Generic; namespace GSF.TimeSeries{    /// <summary>    /// Implementation of a basic <see cref="IFrame"/>.    /// </summary>    /// <remarks>    /// A frame represents a collection of measurements at a given time.    /// </remarks>    public class Frame : IFrame    {        #region [ Members ]         // Fields        private Ticks m_timestamp;                                                          // Time, represented as 100-nanosecond ticks, of this frame of data        private ShortTime m_lifespan;                                                       // Elapsed time since creation of this frame of data        private bool m_published;                                                           // Determines if this frame of data has been published        private int m_sortedMeasurements;                                                   // Total measurements sorted into this frame        private readonly ConcurrentDictionary<MeasurementKey, IMeasurement> m_measurements; // Concurrent dictionary of measurements published by this frame        private IMeasurement m_lastSortedMeasurement;                                       // Last measurement sorted into this frame         #endregion         #region [ Constructors ]         /// <summary>        /// Constructs a new <see cref="Frame"/> given the specified parameters.        /// </summary>        /// <param name="timestamp">Timestamp, in ticks, for this <see cref="Frame"/>.</param>        /// <param name="expectedMeasurements">Expected number of measurements for the <see cref="Frame"/>.</param>        public Frame(Ticks timestamp, int expectedMeasurements = -1)        {            m_timestamp = timestamp;            m_lifespan = ShortTime.Now;             if (expectedMeasurements > 0)                m_measurements = new ConcurrentDictionary<MeasurementKey, IMeasurement>(s_defaultConcurrencyLevel, expectedMeasurements * 2);            else                m_measurements = new ConcurrentDictionary<MeasurementKey, IMeasurement>();             m_sortedMeasurements = -1;        }         /// <summary>        /// Constructs a new <see cref="Frame"/> given the specified parameters.        /// </summary>        /// <param name="timestamp">Timestamp, in ticks, for this <see cref="Frame"/>.</param>        /// <param name="measurements">Initial set of measurements to load into the <see cref="Frame"/>, if any.</param>        public Frame(Ticks timestamp, IDictionary<MeasurementKey, IMeasurement> measurements)        {            m_timestamp = timestamp;            m_lifespan = ShortTime.Now;            m_measurements = new ConcurrentDictionary<MeasurementKey, IMeasurement>(measurements);            m_sortedMeasurements = -1;        }         #endregion         #region [ Properties ]         /// <summary>        /// Keyed measurements in this <see cref="Frame"/>.        /// </summary>        public ConcurrentDictionary<MeasurementKey, IMeasurement> Measurements => m_measurements;         /// <summary>        /// Gets or sets published state of this <see cref="Frame"/> (pre-processing).        /// </summary>        public bool Published        {            get            {                return m_published;            }            set            {                m_published = value;            }        }         /// <summary>        /// Gets or sets total number of measurements that have been sorted into this <see cref="Frame"/>.        /// </summary>        /// <remarks>        /// If this property has not been assigned a value, the property will return measurement count.        /// </remarks>        public int SortedMeasurements        {            get            {                if (m_sortedMeasurements == -1)                    return m_measurements.Count;                 return m_sortedMeasurements;            }            set            {                m_sortedMeasurements = value;            }        }         /// <summary>        /// Gets or sets exact timestamp, in <see cref="Ticks"/>, of the data represented in this <see cref="Frame"/>.        /// </summary>        /// <remarks>        /// The value of this property represents the number of 100-nanosecond intervals that have elapsed since 12:00:00 midnight, January 1, 0001.        /// </remarks>        public virtual Ticks Timestamp        {            get            {                return m_timestamp;            }            set            {                m_timestamp = value;            }        }         /// <summary>        /// Gets the life-span of this <see cref="Frame"/> since its creation.        /// </summary>        public ShortTime Lifespan => m_lifespan;         /// <summary>        /// Gets timestamp, in ticks, of when this <see cref="Frame"/> was created.        /// </summary>        public Ticks CreatedTimestamp => m_lifespan.UtcTime.Ticks;         /// <summary>        /// Gets or sets reference to last measurement that was sorted into this <see cref="Frame"/>.        /// </summary>        public IMeasurement LastSortedMeasurement        {            get            {                return m_lastSortedMeasurement;            }            set            {                m_lastSortedMeasurement = value;            }        }         #endregion         #region [ Methods ]         /// <summary>        /// Create a copy of this <see cref="Frame"/> and its measurements.        /// </summary>        /// <remarks>        /// The measurement dictionary of this <see cref="Frame"/> is synclocked during copy.        /// </remarks>        /// <returns>A cloned <see cref="Frame"/>.</returns>        public virtual Frame Clone()        {            lock (m_measurements)            {                return new Frame(m_timestamp, m_measurements);            }        }         /// <summary>        /// Determines whether the specified <see cref="IFrame"/> is equal to the current <see cref="Frame"/>.        /// </summary>        /// <param name="other">The <see cref="IFrame"/> to compare with the current <see cref="Frame"/>.</param>        /// <returns>        /// true if the specified <see cref="IFrame"/> is equal to the current <see cref="Frame"/>;        /// otherwise, false.        /// </returns>        public bool Equals(IFrame other)        {            return CompareTo(other) == 0;        }         /// <summary>        /// Determines whether the specified <see cref="object"/> is equal to the current <see cref="Frame"/>.        /// </summary>        /// <param name="obj">The <see cref="object"/> to compare with the current <see cref="Frame"/>.</param>        /// <returns>        /// true if the specified <see cref="object"/> is equal to the current <see cref="Frame"/>;        /// otherwise, false.        /// </returns>        public override bool Equals(object obj)        {            IFrame other = obj as IFrame;             if ((object)other != null)                return Equals(other);             return false;        }         /// <summary>        /// Compares the <see cref="Frame"/> with an <see cref="IFrame"/>.        /// </summary>        /// <param name="other">The <see cref="IFrame"/> to compare with the current <see cref="Frame"/>.</param>        /// <returns>A 32-bit signed integer that indicates the relative order of the objects being compared.</returns>        /// <remarks>This implementation of a basic frame compares itself by timestamp.</remarks>        public int CompareTo(IFrame other)        {            if ((object)other != null)                return m_timestamp.CompareTo(other.Timestamp);             return 1;        }         /// <summary>        /// Compares the <see cref="Frame"/> with the specified <see cref="object"/>.        /// </summary>        /// <param name="obj">The <see cref="object"/> to compare with the current <see cref="Frame"/>.</param>        /// <returns>A 32-bit signed integer that indicates the relative order of the objects being compared.</returns>        /// <exception cref="ArgumentException"><paramref name="obj"/> is not an <see cref="IFrame"/>.</exception>        /// <remarks>This implementation of a basic frame compares itself by timestamp.</remarks>        public int CompareTo(object obj)        {            IFrame other = obj as IFrame;             if ((object)other != null)                return CompareTo(other);             throw new ArgumentException("Frame can only be compared with other IFrames");        }         /// <summary>        /// Serves as a hash function for the current <see cref="Frame"/>.        /// </summary>        /// <returns>A hash code for the current <see cref="Frame"/>.</returns>        /// <remarks>Hash code based on timestamp of frame.</remarks>        public override int GetHashCode()        {            // ReSharper disable once NonReadonlyMemberInGetHashCode            return m_timestamp.GetHashCode();        }         #endregion         #region [ Operators ]         /// <summary>        /// Compares two <see cref="Frame"/> timestamps for equality.        /// </summary>        /// <param name="frame1">The <see cref="Frame"/> left hand operand.</param>        /// <param name="frame2">The <see cref="Frame"/> right hand operand.</param>        /// <returns>A <see cref="Boolean"/> representing the result of the operation.</returns>        public static bool operator ==(Frame frame1, Frame frame2)        {            if ((object)frame1 != null)                return frame1.Equals(frame2);             return (object)frame2 == null;        }         /// <summary>        /// Compares two <see cref="Frame"/> timestamps for inequality.        /// </summary>        /// <param name="frame1">The <see cref="Frame"/> left hand operand.</param>        /// <param name="frame2">The <see cref="Frame"/> right hand operand.</param>        /// <returns>A <see cref="Boolean"/> representing the result of the operation.</returns>        public static bool operator !=(Frame frame1, Frame frame2)        {            if ((object)frame1 != null)                return !frame1.Equals(frame2);             return (object)frame2 != null;        }         /// <summary>        /// Returns true if left <see cref="Frame"/> timestamp is greater than right <see cref="Frame"/> timestamp.        /// </summary>        /// <param name="frame1">The <see cref="Frame"/> left hand operand.</param>        /// <param name="frame2">The <see cref="Frame"/> right hand operand.</param>        /// <returns>A <see cref="Boolean"/> representing the result of the operation.</returns>        public static bool operator >(Frame frame1, Frame frame2)        {            if ((object)frame1 != null)                return frame1.CompareTo(frame2) > 0;             return false;        }         /// <summary>        /// Returns true if left <see cref="Frame"/> timestamp is greater than or equal to right <see cref="Frame"/> timestamp.        /// </summary>        /// <param name="frame1">The <see cref="Frame"/> left hand operand.</param>        /// <param name="frame2">The <see cref="Frame"/> right hand operand.</param>        /// <returns>A <see cref="Boolean"/> representing the result of the operation.</returns>        public static bool operator >=(Frame frame1, Frame frame2)        {            if ((object)frame1 != null)                return frame1.CompareTo(frame2) >= 0;             return (object)frame2 == null;        }         /// <summary>        /// Returns true if left <see cref="Frame"/> timestamp is less than right <see cref="Frame"/> timestamp.        /// </summary>        /// <param name="frame1">The <see cref="Frame"/> left hand operand.</param>        /// <param name="frame2">The <see cref="Frame"/> right hand operand.</param>        /// <returns>A <see cref="Boolean"/> representing the result of the operation.</returns>        public static bool operator <(Frame frame1, Frame frame2)        {            if ((object)frame1 != null)                return frame1.CompareTo(frame2) < 0;             return false;        }         /// <summary>        /// Returns true if left <see cref="Frame"/> timestamp is less than or equal to right <see cref="Frame"/> timestamp.        /// </summary>        /// <param name="frame1">The <see cref="Frame"/> left hand operand.</param>        /// <param name="frame2">The <see cref="Frame"/> right hand operand.</param>        /// <returns>A <see cref="Boolean"/> representing the result of the operation.</returns>        public static bool operator <=(Frame frame1, Frame frame2)        {            if ((object)frame1 != null)                return frame1.CompareTo(frame2) <= 0;             return (object)frame2 == null;        }         #endregion         #region [ Static ]         // Static Fields        private static readonly int s_defaultConcurrencyLevel = Environment.ProcessorCount * 4;         #endregion    }}