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Declarative Machine Learning

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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.sysml.runtime.matrix.data;

import java.io.IOException;

import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.mapred.FileOutputFormat;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.RecordWriter;
import org.apache.hadoop.mapred.Reporter;
import org.apache.hadoop.util.Progressable;

public class UnPaddedOutputFormat extends FileOutputFormat
{	
	
	public static class UnpaddedRecordWriter implements RecordWriter
	{
		/** file input stream */
		private FSDataOutputStream out;

		public UnpaddedRecordWriter(FSDataOutputStream fstream)
		{
			out=fstream;
		}
		@Override
		public void close(Reporter report) throws IOException {
			out.close();
			
		}
		@Override
		public void write(K key, V value) throws IOException {
			key.write(out);
			value.write(out);
		}
	}

	@Override
	public RecordWriter getRecordWriter(FileSystem ignored, JobConf job,
			String name, Progressable progress) throws IOException {
		Path file = FileOutputFormat.getTaskOutputPath(job, name);
	    FileSystem fs = file.getFileSystem(job);
	    FSDataOutputStream fileOut = fs.create(file, true, job.getInt("io.file.buffer.size", 4096), progress);
		return new UnpaddedRecordWriter(fileOut);
	}
}