/**
 * 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.hadoop.hive.ql.exec.tez;

import java.io.IOException;
import org.apache.tez.runtime.library.api.KeyValuesReader;

/**
 * Provides a key/values interface out of a KeyValuesReader for use by ReduceRecordSource.
 */
public class KeyValuesFromKeyValues implements KeyValuesAdapter {
  protected KeyValuesReader reader;

  public KeyValuesFromKeyValues(KeyValuesReader reader) {
    this.reader = reader;
  }

  @Override
  public Object getCurrentKey() throws IOException {
    return reader.getCurrentKey();
  }

  @Override
  public Iterable<Object> getCurrentValues() throws IOException {
    return reader.getCurrentValues();
  }

  @Override
  public boolean next() throws IOException {
    return reader.next();
  }
}