Similar to mapVertices and mapEdges, mapTriplets is used to transform edge triplets. The following is the signature of the method:

mapTriplets(scala.Function1<EdgeTriplet<VD,ED>,ED2> map, scala.reflect.ClassTag<ED2> evidence$6)

Here, we will perform the same operation as we executed in the mapEdges section; that is, transform the edge property to integer value. The following is the definition of the transformation function:

public class AbsFunc1 extends AbstractFunction1<EdgeTriplet<string,string>,Integer> implements Serializable { 
  @Override 
  public Integer apply(EdgeTriplet<string,string> triplet) { 
    return triplet.attr().length(); 
  } 
} 

The mapTriplets transformation can be executed as follows:

 graph.mapTriplets(new AbsFunc1(), scala.reflect.ClassTag$.MODULE$.apply(Integer.class));