Builder builder = VehicleRoutingProblem.Builder.newInstance();
VehicleTypeImpl type1 = VehicleTypeImpl.Builder.newInstance("vehType").addCapacityDimension(0, 20).build();
VehicleImpl v = VehicleImpl.Builder.newInstance("v1").addSkill("SKILL5").addSkill("skill1").addSkill("Skill2").setStartLocationId("loc").setType(type1).build();
builder.addVehicle(v);
VehicleRoutingProblem vrp = builder.build();
new VrpXMLWriter(vrp, null).write(infileName);
VehicleRoutingProblem.Builder vrpToReadBuilder = VehicleRoutingProblem.Builder.newInstance();
new VrpXMLReader(vrpToReadBuilder, null).read(infileName);
VehicleRoutingProblem readVrp = vrpToReadBuilder.build();