/**
* {@inheritDoc}
*
* @api
*/
public function registerNamespace($prefix, $uri)
{
if (!$this->transport instanceof WritingInterface) {
throw new UnsupportedRepositoryOperationException('Transport does not support writing');
}
// prevent default namespace prefixes to be overridden.
$this->checkPrefix($prefix);
// prevent default namespace uris to be overridden
if (false !== array_search($uri, $this->defaultNamespaces)) {
throw new NamespaceException("Can not change default namespace {$prefix} = {$uri}");
}
$this->lazyLoadNamespaces();
//first try putting the stuff in backend, and only afterwards update lokal info
// this has no impact on running sessions, go directly to storage
$this->transport->registerNamespace($prefix, $uri);
// update local info
if (false !== ($oldpref = array_search($uri, $this->userNamespaces))) {
// the backend takes care of storing this, but we have to update frontend info
unset($this->userNamespaces[$oldpref]);
}
$this->userNamespaces[$prefix] = $uri;
}
