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    package org.apache.hadoop.mapred.join;
019    
020    import java.util.ArrayList;
021    
022    import org.apache.hadoop.classification.InterfaceAudience;
023    import org.apache.hadoop.classification.InterfaceStability;
024    import org.apache.hadoop.io.Writable;
025    
026    /**
027     * This class provides an implementation of ResetableIterator. The
028     * implementation uses an {@link java.util.ArrayList} to store elements
029     * added to it, replaying them as requested.
030     * Prefer {@link StreamBackedIterator}.
031     */
032    @InterfaceAudience.Public
033    @InterfaceStability.Stable
034    public class ArrayListBackedIterator<X extends Writable> extends 
035        org.apache.hadoop.mapreduce.lib.join.ArrayListBackedIterator<X>
036        implements ResetableIterator<X> {
037    
038      public ArrayListBackedIterator() {
039        super();
040      }
041    
042      public ArrayListBackedIterator(ArrayList<X> data) {
043        super(data);
044      }
045    }