/** Return a Comparator that will order the specified transports in preferred load order. */
public static Comparator<Unit> getLoadableTransportsComparator(
final List<Unit> transports, final Route route, final PlayerID player) {
final Comparator<Unit> decreasingCapacityComparator =
getDecreasingCapacityComparator(transports);
final Match<Unit> incapableTransportMatch = Matches.transportCannotUnload(route.getEnd());
return (u1, u2) -> {
final TripleAUnit t1 = TripleAUnit.get(u1);
final TripleAUnit t2 = TripleAUnit.get(u2);
// Check if transport is incapable due to game state
final boolean isIncapable1 = incapableTransportMatch.match(t1);
final boolean isIncapable2 = incapableTransportMatch.match(t2);
if (!isIncapable1 && isIncapable2) {
return -1;
}
if (isIncapable1 && !isIncapable2) {
return 1;
}
// Use allied transports as a last resort
final boolean isAlliedTrn1 = !t1.getOwner().equals(player);
final boolean isAlliedTrn2 = !t2.getOwner().equals(player);
if (!isAlliedTrn1 && isAlliedTrn2) {
return -1;
}
if (isAlliedTrn1 && !isAlliedTrn2) {
return 1;
}
// Sort by decreasing transport capacity
final int compareCapacity = decreasingCapacityComparator.compare(t1, t2);
if (compareCapacity != 0) {
return compareCapacity;
}
// Sort by decreasing movement
final int left1 = t1.getMovementLeft();
final int left2 = t1.getMovementLeft();
if (left1 != left2) {
return left2 - left1;
}
return Integer.compare(t1.hashCode(), t2.hashCode());
};
}
public static Collection<Unit> getUnitsLoadedOnAlliedTransportsThisTurn(
final Collection<Unit> units) {
final Collection<Unit> rVal = new ArrayList<Unit>();
for (final Unit u : units) {
// a unit loaded onto an allied transport
// cannot be unloaded in the same turn, so
// if we check both wasLoadedThisTurn and
// the transport that transports us, we can tell if
// we were loaded onto an allied transport
// if we are no longer being transported,
// then we must have been transported on our own transport
final TripleAUnit taUnit = (TripleAUnit) u;
if (taUnit.getWasLoadedThisTurn()
&& taUnit.getTransportedBy() != null
&&
// an allied transport if the owner of the transport is not the owner of the unit
!taUnit.getTransportedBy().getOwner().equals(taUnit.getOwner())) {
rVal.add(u);
}
}
return rVal;
}