@Override
/** Execute() method */
public S execute(List<S> solutionList) {
if (null == solutionList) {
throw new JMetalException("The solution list is null");
} else if (solutionList.isEmpty()) {
throw new JMetalException("The solution list is empty");
}
S result;
if (solutionList.size() == 1) {
result = solutionList.get(0);
} else {
result = SolutionListUtils.selectNRandomDifferentSolutions(1, solutionList).get(0);
int count = 1; // at least 2 solutions are compared
do {
S candidate = SolutionListUtils.selectNRandomDifferentSolutions(1, solutionList).get(0);
result = SolutionUtils.getBestSolution(result, candidate, comparator);
} while (++count < this.numberOfTournaments);
}
return result;
}
