public boolean dominates(ObjectiveArray that) {
// get objectives from states.
Objective[] objectivesA = this.getObjectives();
Objective[] objectivesB = that.getObjectives();
// check that sizes are equal.
if (objectivesA.length != objectivesB.length) {
throw new InconsistentObjectiveSizeException();
}
int dominationCountForA = 0;
int dominationCountForB = 0;
int equalityCount = 0;
for (int i = 0; i < objectivesA.length; i++) {
// get corresponding objectives to determine domination.
Objective objectiveA = objectivesA[i];
Objective objectiveB = objectivesB[i];
if (!objectiveA.getBehaviour().equals(objectiveB.getBehaviour())) {
throw new InconsistentObjectiveBehaviourException();
}
// if this objective is designed to minimize.
if (objectiveA.getBehaviour().equals(ObjectiveBehaviour.MINIMIZED)) {
if (objectiveA.getValue() < objectiveB.getValue()) {
dominationCountForA++;
} else if (objectiveB.getValue() < objectiveA.getValue()) {
dominationCountForB++;
} else {
// the equality condition for two objectives.
equalityCount++;
}
} else {
if (objectiveA.getValue() > objectiveB.getValue()) {
dominationCountForA++;
} else if (objectiveB.getValue() > objectiveA.getValue()) {
dominationCountForB++;
} else {
// the equality condition for two objectives.
equalityCount++;
}
}
}
if (equalityCount != 0) {
if (equalityCount < objectivesA.length) {
return (dominationCountForA == (objectivesA.length - equalityCount)) ? true : false;
} else {
// means that all objectives are same.
return false;
}
} else {
return (dominationCountForA == objectivesA.length) ? true : false;
}
}
