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    
019    package org.apache.hadoop.mapred;
020    
021    import java.io.IOException;
022    
023    import org.apache.hadoop.classification.InterfaceAudience.Public;
024    import org.apache.hadoop.classification.InterfaceStability.Evolving;
025    
026    @Public
027    @Evolving
028    public 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    }