Implemented getLength

be-graphes-model/src/main/java/org/insa/graphs/model/Path.java

@@ -210,11 +210,13 @@ public class Path {
      * 
      * @return Total length of the path (in meters).
      *
-     * @deprecated Need to be implemented.
      */
     public float getLength() {
-        // TODO:
+        float length = 0;
-        return 0;
+        for (Arc a : this.arcs) {
+            length += a.getLength();
+        }
+        return length;
     }
 
     /**