/**
* Assign a carrier for this treasure.
*
* @param lb A <code>LogBuilder</code> to log to.
* @return A suitable carrier <code>AIUnit</code>, to which this unit has been queued for
* transport.
*/
private AIUnit assignCarrier(LogBuilder lb) {
final AIUnit aiUnit = getAIUnit();
final Unit unit = getUnit();
final Player player = unit.getOwner();
final Europe europe = player.getEurope();
List<Unit> carriers = player.getCarriersForUnit(unit);
if (carriers.isEmpty()) return null;
// Pick the closest carrier and queue this unit.
final Location here = unit.getLocation();
int turns = INFINITY;
Unit closest = null;
for (Unit c : carriers) {
int t = c.getTurnsToReach(here);
if (turns > t) {
turns = t;
closest = c;
}
}
final AIMain aiMain = getAIMain();
TransportMission tm;
AIUnit aiCarrier;
if (closest != null
&& (aiCarrier = aiMain.getAIUnit(closest)) != null
&& (tm = aiCarrier.getMission(TransportMission.class)) != null) {
setTarget(europe);
aiUnit.changeTransport(aiCarrier);
if (tm.forceCollection(aiUnit, lb)) {
lb.add(" forced collection on ", aiCarrier.getUnit());
return aiCarrier;
}
}
return null;
}
