001/* 002 * Copyright (c) 2007-2015 Concurrent, Inc. All Rights Reserved. 003 * 004 * Project and contact information: http://www.cascading.org/ 005 * 006 * This file is part of the Cascading project. 007 * 008 * Licensed under the Apache License, Version 2.0 (the "License"); 009 * you may not use this file except in compliance with the License. 010 * You may obtain a copy of the License at 011 * 012 * http://www.apache.org/licenses/LICENSE-2.0 013 * 014 * Unless required by applicable law or agreed to in writing, software 015 * distributed under the License is distributed on an "AS IS" BASIS, 016 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 017 * See the License for the specific language governing permissions and 018 * limitations under the License. 019 */ 020 021package cascading.tap.hadoop.io; 022 023import java.io.IOException; 024 025import cascading.util.SingleValueCloseableIterator; 026import org.apache.hadoop.mapred.RecordReader; 027 028/** 029 * RecordReaderIterator is a utility class for handing off a single {@link RecordReader} instance 030 * via the {@link java.util.Iterator}. 031 * <p/> 032 * This class is frequently used with the {@link cascading.tuple.TupleEntrySchemeIterator} where there is only 033 * one RecordReader to iterate values over. 034 */ 035public class RecordReaderIterator extends SingleValueCloseableIterator<RecordReader> 036 { 037 public RecordReaderIterator( RecordReader reader ) 038 { 039 super( reader ); 040 } 041 042 @Override 043 public void close() throws IOException 044 { 045 getCloseableInput().close(); 046 } 047 }