--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/trajectorymanagement/src/Metric.h	Mon Feb 22 22:09:35 2021 -0500
@@ -0,0 +1,40 @@
+#ifndef METRIC_H_
+#define METRIC_H_
+
+#include "Trajectory.h"
+
+/**
+ * Metric class.
+ *
+ * The Metric class is an abstract class. Every class computing similarity between two trajectories should inherit this class.
+ */
+template<typename Tr, typename To>
+class Metric
+{
+public:
+	/**
+	 * Compute similarity between two trajectories.
+	 *
+	 * @param[in] a input trajectory
+	 * @param[in] b input trajectory
+	 * @param[out] result similarity between two trajectories
+	 */
+  virtual void similarity(const Trajectory<Tr> *a, const Trajectory<Tr> *b, To &result) {
+    result = To(0);
+  }
+
+	/**
+	 * Compute distance (or normalized distance) between two trajectories.
+	 *
+	 * @param[in] a input trajectory
+	 * @param[in] b input trajectory
+	 * @param[in] nbOfPoints is the limit to which the distance of trajectories is calculated. This is useful in the event of different sizes.
+	 * @param[out] result distance between two trajectories
+	 */
+  virtual void distance(const Trajectory<Tr> *a, const Trajectory<Tr> *b, To &result, unsigned int nbOfPoints = std::numeric_limits<unsigned int>::max()) = 0;
+
+	
+
+};
+
+#endif /* METRIC_H_ */