@Override
public void phaseEnded(LocalSearchSolverPhaseScope phaseScope) {
super.phaseEnded(phaseScope);
startingTemperatureLevels = null;
temperatureLevels = null;
levelsLength = -1;
}
@Override
public void stepEnded(LocalSearchStepScope stepScope) {
super.stepEnded(stepScope);
double timeGradient = stepScope.getTimeGradient();
double reverseTimeGradient = 1.0 - timeGradient;
temperatureLevels = new double[levelsLength];
for (int i = 0; i < levelsLength; i++) {
temperatureLevels[i] = startingTemperatureLevels[i] * reverseTimeGradient;
if (temperatureLevels[i] < temperatureMinimum) {
temperatureLevels[i] = temperatureMinimum;
}
}
// TODO implement reheating
}
@Override
public void phaseStarted(LocalSearchSolverPhaseScope phaseScope) {
super.phaseStarted(phaseScope);
for (double startingTemperatureLevel : ScoreUtils.extractLevelDoubles(startingTemperature)) {
if (startingTemperatureLevel < 0.0) {
throw new IllegalArgumentException(
"The startingTemperature ("
+ startingTemperature
+ ") cannot have negative level ("
+ startingTemperatureLevel
+ ").");
}
}
startingTemperatureLevels = ScoreUtils.extractLevelDoubles(startingTemperature);
temperatureLevels = startingTemperatureLevels;
levelsLength = startingTemperatureLevels.length;
}