changes

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

@@ -202,7 +202,24 @@ public class Path {
      */
     public boolean isValid() {
         // TODO:
-        return false;
+        boolean res=true;
+        //it is empty
+        if (this.size()!=0 && !this.arcs.isEmpty()){
+            //it contains a single node without arcs
+            Node deb=origin;
+            for (Arc ligne : arcs){
+                if (ligne.getOrigin().equals(deb)) {
+                    deb=ligne.getDestination();
+                }
+                else {
+                    res=false;
+                }
+            }
+
+        }
+        //the first arc has for origin the origin of the path and, for two consecutive arcs, the destination of the first one is the origin of the second one.
+        
+        return res;
     }
 
     /**
@@ -214,7 +231,11 @@ public class Path {
      */
     public float getLength() {
         // TODO:
-        return 0;
+        float res=0;
+        for (Arc ligne : arcs) {
+            res+=ligne.getLength();
+        }
+        return res;
     }
 
     /**
@@ -242,7 +263,12 @@ public class Path {
      */
     public double getMinimumTravelTime() {
         // TODO:
-        return 0;
+        double min=0.0;
+        for (Arc ligne : arcs ){
+            min+=ligne.getMinimumTravelTime();
+        }
+
+        return min;
     }
 
 }