org.apache.sysml.runtime.matrix.mapred.CSVReblockMapper Maven / Gradle / Ivy

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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.mapred;

import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;

import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.ByteWritable;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.SequenceFile;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.Mapper;
import org.apache.hadoop.mapred.OutputCollector;
import org.apache.hadoop.mapred.Reporter;

import org.apache.sysml.runtime.instructions.mr.CSVReblockInstruction;
import org.apache.sysml.runtime.io.IOUtilFunctions;
import org.apache.sysml.runtime.matrix.CSVReblockMR;
import org.apache.sysml.runtime.matrix.CSVReblockMR.BlockRow;
import org.apache.sysml.runtime.matrix.CSVReblockMR.OffsetCount;
import org.apache.sysml.runtime.matrix.data.MatrixBlock;
import org.apache.sysml.runtime.matrix.data.TaggedFirstSecondIndexes;
import org.apache.sysml.runtime.util.UtilFunctions;

public class CSVReblockMapper extends MapperBase implements Mapper
{
	private long rowOffset=0;
	private boolean first=true;
	private long num=0;
	private HashMap offsetMap=new HashMap();
	private String _delim=" ";
	private boolean ignoreFirstLine=false;
	private boolean headerFile=false;

	private IndexedBlockRow idxRow = null;
	
	public static class IndexedBlockRow 
	{
		private BlockRow row=null;
		private TaggedFirstSecondIndexes outIndexes=null;
		
		public IndexedBlockRow() {
			row = new BlockRow();
			row.data = new MatrixBlock();
			outIndexes=new TaggedFirstSecondIndexes();
		}
		
		public BlockRow getRow() { return row; }
		public TaggedFirstSecondIndexes getIndexes() { return outIndexes; }
	}
	
	
	public static IndexedBlockRow processRow(IndexedBlockRow row, String[] cells, long rowOffset, long num, byte outTag, int brlen, int bclen, boolean fill, double fillValue, OutputCollector out) throws IOException
	{
		int start=0;
		row.getIndexes().setTag(outTag);
		long rowIndex=UtilFunctions.blockIndexCalculation(rowOffset+num+1, brlen);
		row.getRow().indexInBlock=UtilFunctions.cellInBlockCalculation(rowOffset+num+1, brlen);
		
		long col=0;
		for(; col out, Reporter reporter)
			throws IOException 
	{
		if(first) {
			rowOffset=offsetMap.get(key.get());
			first=false;
		}
		
		if(key.get()==0 && headerFile && ignoreFirstLine)
			return;
		
		String[] cells = IOUtilFunctions.split( value.toString(), _delim );
		
		for(int i=0; i insv: csv_reblock_instructions)
			for(CSVReblockInstruction in: insv)
			{	
				if(maxBclen out, Reporter reporter)
		throws IOException 
	{
		//do nothing
	}	
}