}
// We only support one provider for one service now
Map<Service, Set<Provider>> serviceToProviders = getServiceProvidersMap(networkId);
Set<Provider> oldProviders = serviceToProviders.get(services.toArray()[0]);
Provider oldProvider = (Provider) oldProviders.toArray()[0];
// Since IP already has service to bind with, the oldProvider can't be null
Set<Provider> newProviders = serviceToProviders.get(service);
if (newProviders == null || newProviders.isEmpty()) {
throw new InvalidParameterException("There is no new provider for IP " + publicIp.getAddress() + " of service " + service.getName() + "!");
}
Provider newProvider = (Provider) newProviders.toArray()[0];
Network network = _networksDao.findById(networkId);
NetworkElement oldElement = getElementImplementingProvider(oldProvider.getName());
NetworkElement newElement = getElementImplementingProvider(newProvider.getName());
if (oldElement instanceof IpDeployingRequester && newElement instanceof IpDeployingRequester) {
IpDeployer oldIpDeployer = ((IpDeployingRequester)oldElement).getIpDeployer(network);
IpDeployer newIpDeployer = ((IpDeployingRequester)newElement).getIpDeployer(network);
if (!oldIpDeployer.getProvider().getName().equals(newIpDeployer.getProvider().getName())) {
throw new InvalidParameterException("There would be multiple providers for IP " + publicIp.getAddress() + "!");