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 org.apache.hadoop.classification.InterfaceAudience;
022    import org.apache.hadoop.classification.InterfaceStability;
023    
024    /**
025     * A general identifier, which internally stores the id
026     * as an integer. This is the super class of {@link JobID}, 
027     * {@link TaskID} and {@link TaskAttemptID}.
028     * 
029     * @see JobID
030     * @see TaskID
031     * @see TaskAttemptID
032     */
033    @InterfaceAudience.Public
034    @InterfaceStability.Stable
035    public abstract class ID extends org.apache.hadoop.mapreduce.ID {
036    
037      /** constructs an ID object from the given int */
038      public ID(int id) {
039        super(id);
040      }
041    
042      protected ID() {
043      }
044    
045    }