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FAMS/ROC/ROCSerializer.cs

+/*
+ * Created by: Miguel Angel Medina Prez (miguel.medina.perez@gmail.com)
+ * Created: 
+ * Comments by: Miguel Angel Medina Prez (miguel.medina.perez@gmail.com)
+ */
+
+using System;
+using System.Collections.Generic;
+using System.IO;
+
+namespace PatternRecognition.ROC
+{
+    /// <summary>
+    ///     A utility class used to serialize and deserialize ROC curves.
+    /// </summary>
+    public static class ROCSerializer
+    {
+        /// <summary>
+        ///     Serialize the ROC curve to the specified file name.
+        /// </summary>
+        /// <param name="roc">
+        ///     The points composing the ROC curve.
+        /// </param>
+        /// <param name="xLabel">
+        ///     The label of horizontal axis in the ROC curve.
+        /// </param>
+        /// <param name="yLabel">
+        ///     The label of vertical axis in the ROC curve.
+        /// </param>
+        /// <param name="matcherName">
+        ///     The name of the fingerprint matcher.
+        /// </param>
+        /// <param name="fileName">
+        ///     The file name where the curve will be serialized.
+        /// </param>
+        public static void Serialize(List<ROCPoint> roc, string xLabel, string yLabel, string matcherName, string fileName)
+        {
+            using (var fs = new StreamWriter(fileName, true))
+            {
+                fs.WriteLine("Matcher:;" + matcherName);
+                fs.WriteLine(xLabel + ";" + yLabel);
+                foreach (ROCPoint rocPoint in roc)
+                    fs.WriteLine(string.Format("{0:f4};{1:f4}", rocPoint.x, rocPoint.y));
+                fs.Close();
+            }
+        }
+
+        /// <summary>
+        ///     Serialize the ROC curve to the specified <see cref="StreamWriter"/>.
+        /// </summary>
+        /// <param name="roc">
+        ///     The points composing the ROC curve.
+        /// </param>
+        /// <param name="xLabel">
+        ///     The label of horizontal axis in the ROC curve.
+        /// </param>
+        /// <param name="yLabel">
+        ///     The label of vertical axis in the ROC curve.
+        /// </param>
+        /// <param name="matcherName">
+        ///     The name of the fingerprint matcher.
+        /// </param>
+        /// <param name="fs">
+        ///     The <see cref="StreamWriter"/> where the curve will be serialized.
+        /// </param>
+        public static void Serialize(List<ROCPoint> roc, string xLabel, string yLabel, string matcherName, StreamWriter fs)
+        {
+                fs.WriteLine("Matcher:;" + matcherName);
+                fs.WriteLine(xLabel + ";" + yLabel + ";Threshold");
+                foreach (ROCPoint rocPoint in roc)
+                    fs.WriteLine(string.Format("{0:f4};{1:f4};{2:f4}", rocPoint.x, rocPoint.y, rocPoint.matchingValue));
+                fs.Close();
+        }
+
+        /// <summary>
+        ///     Deserialize the ROC curve from the specified file name.
+        /// </summary>
+        /// <param name="fileName">
+        ///     The file name where the ROC curve is serialized.
+        /// </param>
+        /// <param name="xLabel">
+        ///     The label of horizontal axis in the ROC curve.
+        /// </param>
+        /// <param name="yLabel">
+        ///     The label of vertical axis in the ROC curve.
+        /// </param>
+        /// <param name="matcherName">
+        ///     The name of the fingerprint matcher.
+        /// </param>
+        /// <returns>
+        ///     The points composing the ROC curve.
+        /// </returns>
+        public static List<ROCPoint> Deserialize(string fileName, out string xLabel, out string yLabel, out string matcherName)
+        {
+            var roc = new List<ROCPoint>();
+            using (var sr = new StreamReader(fileName))
+            {
+                matcherName = sr.ReadLine();
+                var line = sr.ReadLine();
+                var splitStringArray = new string[1] { ";" };
+                var members = line.Split(splitStringArray, StringSplitOptions.None);
+                xLabel = members[0];
+                yLabel = members[1];
+
+                // Read lines from the file until the end of the file is reached.
+                while ((line = sr.ReadLine()) != null)
+                {
+                    members = line.Split(splitStringArray, StringSplitOptions.None);
+                    var rocPoint = new ROCPoint(Convert.ToDouble(members[0]), Convert.ToDouble(members[1]), Convert.ToDouble(members[2]));
+                    roc.Add(rocPoint);
+                }
+                sr.Close();
+            }
+            return roc;
+        }
+    }
+}
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