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Declarative Machine Learning
/*
* 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.computeBlockIndex(rowOffset+num+1, brlen);
row.getRow().indexInBlock=UtilFunctions.computeCellInBlock(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
}
}