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 */
018package org.apache.hadoop.hbase.mapred;
019
020import org.apache.hadoop.hbase.client.Result;
021import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
022import org.apache.hadoop.io.WritableComparable;
023import org.apache.hadoop.mapred.Mapper;
024import org.apache.yetus.audience.InterfaceAudience;
025
026/**
027 * Scan an HBase table to sort by a specified sort column. If the column does not exist, the record
028 * is not passed to Reduce.
029 * @param <K> WritableComparable key class
030 * @param <V> Writable value class
031 */
032@InterfaceAudience.Public
033public interface TableMap<K extends WritableComparable<? super K>, V>
034  extends Mapper<ImmutableBytesWritable, Result, K, V> {
035
036}