/// <summary>
/// Creates route assignments from the given trucks and jobs
/// </summary>
/// <param name="drivers"></param>
/// <param name="defaultDriver"> </param>
/// <param name="jobs"></param>
/// <returns></returns>
public virtual Solution BuildSolution(IList <Driver> drivers, Driver defaultDriver, IList <Job> jobs)
{
if (drivers == null)
{
throw new ArgumentNullException("drivers");
}
if (jobs == null)
{
throw new ArgumentNullException("jobs");
}
if (defaultDriver == null)
{
throw new ArgumentNullException("defaultDriver");
}
if (jobs.Count == 0)
{
throw new OptimizationException("Need at least one job to build solution");
}
if (!_initialized)
{
throw new OptimizationException("Optimizer not intialized. Call Initialize() prior to building solutions.");
}
_isCancelling = false;
// clear pheromone matrix
_pheromoneMatrix.Clear();
// Create driver nodes
var driverNodes = drivers.Select(driver => new DriverNode(driver))
.OrderBy(f => _randomNumberGenerator.Next())
.ToList();
foreach (var driverNode in driverNodes)
{
driverNode.Priority = 1; // init priority
}
// Create job nodes
foreach (var job in jobs)
{
switch (job.OrderType)
{
case 3:
job.Priority = 1;
break;
case 2:
job.Priority = 2;
break;
case 1:
job.Priority = 3;
break;
default:
job.Priority = 1;
break;
}
}
var jobNodes = new List <JobNode>();
foreach (var job in jobs.OrderBy(f => _randomNumberGenerator.Next()))
{
var jobNode = _nodeFactory.CreateJobNode(job); // create node, set priority
jobNode.RouteStatistics = _routeStopService.CalculateRouteStatistics(jobNode.RouteStops);
jobNodes.Add(jobNode);
}
// create dummy drivers (for worst case scenario)
var dummyDriversToCreate = jobNodes.Count() - driverNodes.Count();
if (dummyDriversToCreate > 0)
{
var dummyDriverNode = new DriverNode(defaultDriver);
for (int i = 0; i < dummyDriversToCreate; i++)
{
driverNodes.Add(dummyDriverNode);
}
}
// build solution
var bestSolution = BuildSolution(defaultDriver, jobNodes.Cast <INode>().ToList(), driverNodes);
_isCancelling = false;
return(bestSolution);
}