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Presto - Local File Connector
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/*
* 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.localfile;
import com.facebook.presto.spi.ColumnHandle;
import com.facebook.presto.spi.ConnectorSession;
import com.facebook.presto.spi.ConnectorSplit;
import com.facebook.presto.spi.RecordSet;
import com.facebook.presto.spi.connector.ConnectorRecordSetProvider;
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 LocalFileRecordSetProvider
implements ConnectorRecordSetProvider
{
private final LocalFileTables localFileTables;
@Inject
public LocalFileRecordSetProvider(LocalFileTables localFileTables)
{
this.localFileTables = requireNonNull(localFileTables, "localFileTables is null");
}
@Override
public RecordSet getRecordSet(ConnectorTransactionHandle transactionHandle, ConnectorSession session, ConnectorSplit split, List columns)
{
requireNonNull(split, "split is null");
LocalFileSplit localFileSplit = (LocalFileSplit) split;
ImmutableList.Builder handles = ImmutableList.builder();
for (ColumnHandle handle : columns) {
handles.add((LocalFileColumnHandle) handle);
}
return new LocalFileRecordSet(localFileTables, localFileSplit, handles.build());
}
}