/*
* 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 com.facebook.presto.mongodb;
import com.facebook.presto.spi.ColumnHandle;
import com.facebook.presto.spi.ConnectorPageSource;
import com.facebook.presto.spi.ConnectorSession;
import com.facebook.presto.spi.ConnectorSplit;
import com.facebook.presto.spi.connector.ConnectorPageSourceProvider;
import com.facebook.presto.spi.connector.ConnectorTransactionHandle;
import com.google.common.collect.ImmutableList;
import javax.inject.Inject;
import java.util.List;
import static java.util.Objects.requireNonNull;
public class MongoPageSourceProvider
implements ConnectorPageSourceProvider
{
private final MongoSession mongoSession;
@Inject
public MongoPageSourceProvider(MongoSession mongoSession)
{
this.mongoSession = requireNonNull(mongoSession, "mongoSession is null");
}
@Override
public ConnectorPageSource createPageSource(ConnectorTransactionHandle transactionHandle, ConnectorSession session, ConnectorSplit split, List<ColumnHandle> columns)
{
MongoSplit mongodbSplit = (MongoSplit) split;
ImmutableList.Builder<MongoColumnHandle> handles = ImmutableList.builder();
for (ColumnHandle handle : requireNonNull(columns, "columns is null")) {
handles.add((MongoColumnHandle) handle);
}
return new MongoPageSource(mongoSession, mongodbSplit, handles.build());
}
}