// Copyright (C) 2011-2012 CRS4.
//
// This file is part of Seal.
//
// Seal is free software: you can redistribute it and/or modify it
// under the terms of the GNU General Public License as published by the Free
// Software Foundation, either version 3 of the License, or (at your option)
// any later version.
//
// Seal is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License along
// with Seal. If not, see <http://www.gnu.org/licenses/>.
package it.crs4.seal.prq;
import it.crs4.seal.common.AbstractTaggedMapping;
import it.crs4.seal.common.OutputStreamFactory;
import it.crs4.seal.common.ReadPair;
import java.io.DataOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.compress.CompressionCodec;
import org.apache.hadoop.io.compress.GzipCodec;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.RecordWriter;
import org.apache.hadoop.mapreduce.TaskAttemptContext;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
/**
* Output format for the prq format.
*
*/
public class PrqOutputFormat extends FileOutputFormat<Text, ReadPair>
{
public static class PrqRecordWriter extends RecordWriter<Text,ReadPair>
{
private DataOutputStream os;
public PrqRecordWriter(DataOutputStream stream)
{
os = stream;
}
/**
* Writes one mapping.
*
* Writes \t sequence \t quality. If map is null it just writes
* the delimiters with empty fields.
*
* Not that it doesn't write a trailing delimiter.
*/
private void writeMapping(AbstractTaggedMapping map) throws IOException
{
os.writeByte('\t');
if (map != null)
{
ByteBuffer buffer = map.getSequence();
os.write(buffer.array(), buffer.position(), map.getLength());
os.writeByte('\t');
buffer = map.getBaseQualities();
os.write(buffer.array(), buffer.position(), map.getLength());
}
else
os.writeByte('\t');
}
public void write(Text key, ReadPair pair) throws IOException
{
if (key != null)
os.write(key.getBytes(), 0, key.getLength());
else
os.writeBytes(pair.getName());
writeMapping(pair.getRead1());
writeMapping(pair.getRead2());
os.writeByte('\n');
}
public void close(TaskAttemptContext context) throws IOException
{
os.close();
}
}
public RecordWriter<Text,ReadPair> getRecordWriter(TaskAttemptContext task)
throws IOException
{
DataOutputStream os = new OutputStreamFactory(task).makeStream(this.getDefaultWorkFile(task, ""));
return new PrqRecordWriter(os);
}
}