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Common/DTS.Common.Utilities/.svn/pristine/66/66adba6f9a8974d480ae6b9af50b2e32e00fe0ce.svn-base

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+/*
+Math.Nhtsa.ChannelIntegration.cs
+
+$Log: Math.Nhtsa.ChannelIntegration.cs,v $
+Revision 1.4  2007/10/04 04:57:45  Paul Hrissikopoulos
+Added new integration object.
+
+Revision 1.3  2007/08/24 23:31:08  Paul Hrissikopoulos
+Fixed comment typos.
+
+Revision 1.2  2007/03/28 15:58:02  Paul Hrissikopoulos
+Fixed error in integration calculation; fixed erroenous error check in SampleRate accessor.
+
+Revision 1.1  2007/02/05 17:17:08  Paul Hrissikopoulos
+Finished installing generic channel math framework + basic calculus operations.
+
+Copyright © 2007
+Diversified Technical Systems, Inc.
+All Rights Reserved
+*/
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+using DTS.Common.Utilities.DotNetProgrammingConstructs;
+
+namespace DTS.Common.Utilities.Math.Nhtsa
+{
+    ////////////////////////////////////////////////////////////////////////////////
+    /// <summary>
+    /// Representation of NHTSA-based integration channel operation.
+    /// </summary>
+    public class Integration : DoubleListOperation
+    {
+        ////////////////////////////////////////////////////////////////////////////////
+        /// <summary>
+        /// Get/set the <see cref="double"/> sample rate for this data to be integrated.
+        /// </summary>
+        public double SampleRate
+        {
+            get => _SampleRate.Value;
+            set => _SampleRate.Value = value;
+        }
+        private Property<double> _SampleRate
+            = new Property<double>(
+                typeof(Integration).FullName + ".SampleRate",
+                0.0,
+                false
+            );
+        ////////////////////////////////////////////////////////////////////////////////
+
+        ////////////////////////////////////////////////////////////////////////////////
+        /// <summary>
+        /// Initialize an instance of the Integration class.
+        /// </summary>
+        /// 
+        /// <param name="domain">
+        /// The System.Collections.Generic.IList of <see cref="double"/>s
+        /// domain for this operation.
+        /// </param>
+        /// 
+        public Integration(IList<double> domain)
+            : base(domain)
+        {   //
+            // I'd prefer to do this statically, but I don't know of any C# way to place a constraint
+            // on a generic type that's already been determined by some ancestor we're inheriting from,
+            // so for now we'll have to dynamically check it on object instantiation.
+            //
+            if (!(domain is ICloneable))
+                throw new InvalidCastException("the domain type for " + typeof(Integration).FullName + " must be ICloneable");
+        }
+        ////////////////////////////////////////////////////////////////////////////////
+
+        ////////////////////////////////////////////////////////////////////////////////
+        /// <summary>
+        /// Initialize an instance of the Iso.ChannelIntegration class.
+        /// </summary>
+        ///
+        /// <param name="domain">
+        /// The System.Collections.Generic.IList of <see cref="double"/>s
+        /// domain for this operation.
+        /// </param>
+        /// 
+        /// <param name="sampleRate">
+        /// The <see cref="int"/> sample rate of the channel to be integrated.
+        /// </param>
+        /// 
+        public Integration(IList<double> domain, int sampleRate)
+            : this(domain)
+        {
+            try { SampleRate = sampleRate; }
+            catch (System.Exception ex)
+            {
+                throw new Exception("encountered problem constructing " + GetType().FullName, ex);
+            }
+        }
+        ////////////////////////////////////////////////////////////////////////////////
+
+        ////////////////////////////////////////////////////////////////////////////////
+        /// <summary>
+        /// Get the System.Collections.Generic.IList of <see cref="double"/>s result of
+        /// the operation on the channel.
+        /// </summary>
+        public override IList<double> Range
+        {
+            get
+            {
+                try
+                {
+                    if (null == Domain)
+                        throw new ArgumentNullException("attempted to integrate null channel reference");
+
+                    else if (0.0 >= SampleRate)
+                        throw new ArgumentOutOfRangeException("SampleRate must be greater than zero");
+
+                    else if (!(Domain is ICloneable))
+                        throw new InvalidCastException("the domain type for " + typeof(Integration).FullName + " must be ICloneable");
+
+                    else
+                    {
+                        var IndexOfLastSample = Domain.Count - 1;
+                        var de = 1 / (SampleRate * 2.0);
+                        var range = ((ICloneable)Domain).Clone() as IList<double>;
+
+                        range[0] = Domain[0] * de;
+                        for (var t = 1; t < IndexOfLastSample; t++)
+                            range[t] = range[t - 1] + 2 * Domain[t] * de;
+                        range[IndexOfLastSample] = range[IndexOfLastSample - 1] + Domain[IndexOfLastSample] * de;
+
+                        return range;
+                    }
+                }
+
+                catch (System.Exception ex)
+                {
+                    throw new Exception("encountered problem doing " + GetType().FullName + " operation", ex);
+                }
+            }
+        }
+        ////////////////////////////////////////////////////////////////////////////////
+    }
+    ////////////////////////////////////////////////////////////////////////////////
+}