/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.drill.exec.physical.impl.statistics;

import java.util.List;
import org.apache.drill.common.exceptions.ExecutionSetupException;
import org.apache.drill.exec.ops.ExecutorFragmentContext;
import org.apache.drill.exec.physical.config.StatisticsMerge;
import org.apache.drill.exec.physical.impl.BatchCreator;
import org.apache.drill.exec.record.CloseableRecordBatch;
import org.apache.drill.exec.record.RecordBatch;
import com.google.common.base.Preconditions;

@SuppressWarnings("unused")
public class StatisticsMergeBatchCreator implements BatchCreator<StatisticsMerge>{

  @Override
  public CloseableRecordBatch getBatch(ExecutorFragmentContext context, StatisticsMerge config,
                                       List<RecordBatch> children) throws ExecutionSetupException {
    Preconditions.checkArgument(children.size() == 1);
    return new StatisticsMergeBatch(config, children.iterator().next(), context);
  }
}