public boolean addActiveVessel(Craft aActiveVessel) {
boolean wasAdded = false;
if (activeVessels.contains(aActiveVessel)) {
return false;
}
CanalNetwork existingCanalNetwork = aActiveVessel.getCanalNetwork();
if (existingCanalNetwork == null) {
aActiveVessel.setCanalNetwork(this);
} else if (!this.equals(existingCanalNetwork)) {
existingCanalNetwork.removeActiveVessel(aActiveVessel);
addActiveVessel(aActiveVessel);
} else {
activeVessels.add(aActiveVessel);
}
wasAdded = true;
return wasAdded;
}
public boolean removeActiveVessel(Craft aActiveVessel) {
boolean wasRemoved = false;
if (activeVessels.contains(aActiveVessel)) {
activeVessels.remove(aActiveVessel);
aActiveVessel.setCanalNetwork(null);
wasRemoved = true;
}
return wasRemoved;
}