/**
 * Copyright 2014 SURFsara
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package nl.surfsara.warcutils;

import java.io.IOException;

import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.mapreduce.InputSplit;
import org.apache.hadoop.mapreduce.RecordReader;
import org.apache.hadoop.mapreduce.TaskAttemptContext;
import org.apache.hadoop.mapreduce.lib.input.SequenceFileInputFormat;
import org.jwat.warc.WarcRecord;

/**
 * Hadoop InputFormat for warc wat and wet files which have been converted to
 * sequencefiles. The sequencefiles are expected to be in the format
 * <LongWritable, Text>. Where each text value parses as one WarcRecord from the
 * Java Web Archive Toolkit.
 * 
 * @author mathijs.kattenberg@surfsara.nl
 */
public class WarcSequenceFileInputFormat extends SequenceFileInputFormat<LongWritable, WarcRecord> {
	public WarcSequenceFileInputFormat() {
		super();
	}

	public RecordReader<LongWritable, WarcRecord> createRecordReader(InputSplit split, TaskAttemptContext context) throws IOException {
		return new WarcSequenceFileRecordReader();
	}
}
