adding check functions for TrainProperties

train_properties.go

@@ -8,7 +8,7 @@ type VersionStruct struct {
 	Patch int64
 }
 
-func (b *VersionStruct) toString() string{
+func (b *VersionStruct) ToString() string{
 	var retVal string
 
 	retVal += strconv.FormatInt(b.Major,10) + "."
@@ -45,3 +45,24 @@ func (b *TrainProperties040) Cast() TrainProperties{
 	retVal.VelocityUnit = b.VelocityUnit
 	return retVal
 }
+
+func  (b *TrainProperties) IsValid() bool{
+    tmp := b.TrainProperties040
+    return tmp.IsValid()
+}
+
+func (b *TrainProperties040) IsValid() bool{
+    if b.Name == "" || b.Mass == 0{
+        return false
+    }
+    
+    if b.MaxVelocity == 0 || b.MaxAcceleration == 0{
+        return false
+    }
+    
+    if ! (b.VelocityUnit == "ms" || b.VelocityUnit == "kmh" || b.VelocityUnit == ""){
+        return false
+    }
+    
+    return true
+}