* the invalid mask length exception
*/
public void addClientSubscriptionId(String clientSubscriptionId, SubscriptionMask clientMask) throws InvalidMaskLengthException {
if (this.subscriptionMask != null && (this.subscriptionMask.getValue().length() != clientMask.getValue().length())) {
// client mask has invalid (different than current mask of cascaded client) length
throw new InvalidMaskLengthException("client mask has invalid length: clientSubscriptionId=" + clientSubscriptionId
+ " clientMask=" + clientMask);
}
this.clientSubscriptionIds.put(clientSubscriptionId, clientMask);
}