public Set<Long> getCharacterIDs() {
		if (toCharacterIDs == null || toCharacterIDs.length() == 0)
			return null;
		HashSet<Long> characterIDs = new HashSet<Long>();
		for (String characterID : toCharacterIDs.split(","))
			characterIDs.add(Long.parseLong(characterID));
		return characterIDs;
	}