io.trino.metadata.RedirectionAwareTableHandle 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.metadata;
import java.util.Optional;
import static com.google.common.base.Preconditions.checkArgument;
import static java.util.Objects.requireNonNull;
public record RedirectionAwareTableHandle(
Optional tableHandle,
// the target table name after redirection. Optional.empty() if the table is not redirected.
Optional redirectedTableName)
{
public static RedirectionAwareTableHandle withRedirectionTo(QualifiedObjectName redirectedTableName, TableHandle tableHandle)
{
return new RedirectionAwareTableHandle(Optional.of(tableHandle), Optional.of(redirectedTableName));
}
public static RedirectionAwareTableHandle noRedirection(Optional tableHandle)
{
return new RedirectionAwareTableHandle(tableHandle, Optional.empty());
}
public RedirectionAwareTableHandle
{
requireNonNull(tableHandle, "tableHandle is null");
requireNonNull(redirectedTableName, "redirectedTableName is null");
// Table handle must exist if there is redirection
checkArgument(tableHandle.isPresent() || redirectedTableName.isEmpty(), "redirectedTableName present without tableHandle");
}
}