private HashMap<Integer, HashMap<Integer, ArrayList<Integer>>> createGiantTourChromosome(
HashMap<Integer, Set<Integer>> installationDepartureChromosome,
HashMap<Integer, Set<Integer>> vesselDepartureChromosome) {
HashMap<Integer, Set<Integer>> reversedInstallationChromosome =
Utilities.getReversedHashMap(
installationDepartureChromosome); // the key is a period/day and the Set<Integer> is a
// set of installation numbers
HashMap<Integer, Set<Integer>> reversedVesselChromosome =
Utilities.getReversedHashMap(
vesselDepartureChromosome); // the key is a period/day, and the Set<Integer> is a set of
// vessel numbers
int nDays = problemData.getLengthOfPlanningPeriod();
int nVessels = problemData.getVessels().size();
// initializing
HashMap<Integer, HashMap<Integer, ArrayList<Integer>>> giantTourChromosome =
GenotypeHGS.generateEmptyGiantTourChromosome(nDays, nVessels);
// allocating
for (Integer day : reversedInstallationChromosome.keySet()) {
Set<Integer> installationsToAllocate = reversedInstallationChromosome.get(day);
Set<Integer> availableVessels = reversedVesselChromosome.get(day);
HashMap<Integer, ArrayList<Integer>> vesselAllocations = giantTourChromosome.get(day);
for (Integer installation : installationsToAllocate) {
Integer randomVessel = Utilities.pickRandomElementFromSet(availableVessels);
ArrayList<Integer> existingInstallations = vesselAllocations.get(randomVessel);
existingInstallations.add(installation);
vesselAllocations.put(randomVessel, existingInstallations);
}
giantTourChromosome.put(day, vesselAllocations);
}
// shuffle sequence of visits
for (Integer day : giantTourChromosome.keySet()) {
for (Integer vessel : giantTourChromosome.get(day).keySet()) {
ArrayList<Integer> installationsToVisit = giantTourChromosome.get(day).get(vessel);
Collections.shuffle(installationsToVisit);
}
}
return giantTourChromosome;
}
