001/**
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018
019package org.apache.hadoop.mapred;
020
021import java.io.IOException;
022
023import org.apache.hadoop.classification.InterfaceAudience.Public;
024import org.apache.hadoop.classification.InterfaceStability.Evolving;
025
026@Public
027@Evolving
028public interface InputSplitWithLocationInfo extends InputSplit {
029  /**
030   * Gets info about which nodes the input split is stored on and how it is
031   * stored at each location.
032   * 
033   * @return list of <code>SplitLocationInfo</code>s describing how the split
034   *    data is stored at each location. A null value indicates that all the
035   *    locations have the data stored on disk.
036   * @throws IOException
037   */
038  SplitLocationInfo[] getLocationInfo() throws IOException;
039}