io.trino.connector.ConnectorCatalogServiceProvider Maven / Gradle / Ivy
/*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.trino.connector;
import io.trino.spi.connector.CatalogHandle;
import java.util.function.Function;
import static com.google.common.base.Preconditions.checkArgument;
import static java.util.Objects.requireNonNull;
public class ConnectorCatalogServiceProvider
implements CatalogServiceProvider
{
private final String name;
private final ConnectorServicesProvider connectorServicesProvider;
private final Function serviceGetter;
public ConnectorCatalogServiceProvider(String name, ConnectorServicesProvider connectorServicesProvider, Function serviceGetter)
{
this.name = requireNonNull(name, "name is null");
this.connectorServicesProvider = requireNonNull(connectorServicesProvider, "connectorServicesProvider is null");
this.serviceGetter = requireNonNull(serviceGetter, "serviceGetter is null");
}
@Override
public T getService(CatalogHandle catalogHandle)
{
ConnectorServices connectorServices = connectorServicesProvider.getConnectorServices(catalogHandle);
T result = serviceGetter.apply(connectorServices);
checkArgument(result != null, "Catalog '%s' does not have a %s", catalogHandle, name);
return result;
}
}