static void apply(List<Visit> state, ScoreDirector scoreDirector) {
for (int i = state.size() - 1; i > 0; i--) {
final ParcelVisit subject = (ParcelVisit) state.get(i);
scoreDirector.beforeVariableChanged(subject, PREV_VISIT);
final Visit target = state.get(i - 1);
if (target == NullVisit.INSTANCE) {
subject.setPreviousVisit(null);
} else {
subject.setPreviousVisit(target);
}
scoreDirector.afterVariableChanged(subject, PREV_VISIT);
}
}
static MovePair create(ParcelVisit pick, ParcelVisit delv, Visit pickToPrev, Visit delvToPrev) {
final ImmutableList.Builder<Changeset> changesets = ImmutableList.builder();
if (delv.equals(pick.getNextVisit()) || pick.equals(delv.getNextVisit())) {
// pickup and delivery are neighbors in originating vehicle
if (pick.isBefore(delv)) {
changesets.add(
Changeset.create(
nonNulls(pick.getPreviousVisit(), pick, delv, delv.getNextVisit()),
nonNulls(pick.getPreviousVisit(), delv.getNextVisit())));
} else {
changesets.add(
Changeset.create(
nonNulls(delv.getPreviousVisit(), delv, pick, pick.getNextVisit()),
nonNulls(delv.getPreviousVisit(), pick.getNextVisit())));
}
} else {
// not neighbors in originating vehicle
changesets.add(
Changeset.create(
nonNulls(pick.getPreviousVisit(), pick, pick.getNextVisit()),
nonNulls(pick.getPreviousVisit(), pick.getNextVisit())));
changesets.add(
Changeset.create(
nonNulls(delv.getPreviousVisit(), delv, delv.getNextVisit()),
nonNulls(delv.getPreviousVisit(), delv.getNextVisit())));
}
if (pickToPrev.equals(delvToPrev) || delvToPrev.equals(pick)) {
// targets are the same, meaning that they are neighbors
changesets.add(
Changeset.create(
nonNulls(pickToPrev, pickToPrev.getNextVisit()),
nonNulls(pickToPrev, pick, delv, pickToPrev.getNextVisit())));
} else {
changesets.add(
Changeset.create(
nonNulls(pickToPrev, pickToPrev.getNextVisit()),
nonNulls(pickToPrev, pick, pickToPrev.getNextVisit())));
changesets.add(
Changeset.create(
nonNulls(delvToPrev, delvToPrev.getNextVisit()),
nonNulls(delvToPrev, delv, delvToPrev.getNextVisit())));
}
return new MovePair(changesets.build(), false);
}