| /* |
| * 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.sysds.runtime.io; |
| |
| import java.io.BufferedWriter; |
| import java.io.IOException; |
| import java.io.OutputStreamWriter; |
| import java.util.Iterator; |
| |
| import org.apache.hadoop.fs.FSDataOutputStream; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.mapred.JobConf; |
| import org.apache.sysds.conf.ConfigurationManager; |
| import org.apache.sysds.runtime.DMLRuntimeException; |
| import org.apache.sysds.runtime.matrix.data.IJV; |
| import org.apache.sysds.runtime.matrix.data.MatrixBlock; |
| import org.apache.sysds.runtime.util.HDFSTool; |
| |
| public class WriterTextCell extends MatrixWriter |
| { |
| @Override |
| public final void writeMatrixToHDFS(MatrixBlock src, String fname, long rlen, long clen, int blen, long nnz, boolean diag) |
| throws IOException, DMLRuntimeException |
| { |
| //validity check matrix dimensions |
| if( src.getNumRows() != rlen || src.getNumColumns() != clen ) { |
| throw new IOException("Matrix dimensions mismatch with metadata: "+src.getNumRows()+"x"+src.getNumColumns()+" vs "+rlen+"x"+clen+"."); |
| } |
| |
| //prepare file access |
| JobConf job = new JobConf(ConfigurationManager.getCachedJobConf()); |
| Path path = new Path( fname ); |
| FileSystem fs = IOUtilFunctions.getFileSystem(path, job); |
| |
| //if the file already exists on HDFS, remove it. |
| HDFSTool.deleteFileIfExistOnHDFS( fname ); |
| |
| //core write |
| writeTextCellMatrixToHDFS(path, job, fs, src, rlen, clen); |
| |
| IOUtilFunctions.deleteCrcFilesFromLocalFileSystem(fs, path); |
| } |
| |
| @Override |
| public final void writeEmptyMatrixToHDFS(String fname, long rlen, long clen, int blen) |
| throws IOException, DMLRuntimeException |
| { |
| Path path = new Path( fname ); |
| FileSystem fs = IOUtilFunctions.getFileSystem(path); |
| try( FSDataOutputStream writer = fs.create(path) ){ |
| writer.writeBytes(IOUtilFunctions.EMPTY_TEXT_LINE); |
| } |
| |
| IOUtilFunctions.deleteCrcFilesFromLocalFileSystem(fs, path); |
| } |
| |
| protected void writeTextCellMatrixToHDFS( Path path, JobConf job, FileSystem fs, MatrixBlock src, long rlen, long clen ) |
| throws IOException |
| { |
| //sequential write text cell file |
| writeTextCellMatrixToFile(path, job, fs, src, 0, (int)rlen); |
| } |
| |
| protected static void writeTextCellMatrixToFile( Path path, JobConf job, FileSystem fs, MatrixBlock src, int rl, int ru ) |
| throws IOException |
| { |
| boolean sparse = src.isInSparseFormat(); |
| int clen = src.getNumColumns(); |
| |
| try( BufferedWriter br = new BufferedWriter(new OutputStreamWriter(fs.create(path,true))) ) |
| { |
| //for obj reuse and preventing repeated buffer re-allocations |
| StringBuilder sb = new StringBuilder(); |
| |
| if( sparse ) //SPARSE |
| { |
| Iterator<IJV> iter = src.getSparseBlockIterator(rl, ru); |
| while( iter.hasNext() ) |
| { |
| IJV cell = iter.next(); |
| |
| sb.append(cell.getI()+1); |
| sb.append(' '); |
| sb.append(cell.getJ()+1); |
| sb.append(' '); |
| sb.append(cell.getV()); |
| sb.append('\n'); |
| br.write( sb.toString() ); //same as append |
| sb.setLength(0); |
| } |
| } |
| else //DENSE |
| { |
| for( int i=rl; i<ru; i++ ) |
| { |
| String rowIndex = Integer.toString(i+1); |
| for( int j=0; j<clen; j++ ) |
| { |
| double lvalue = src.getValueDenseUnsafe(i, j); |
| if( lvalue != 0 ) //for nnz |
| { |
| sb.append(rowIndex); |
| sb.append(' '); |
| sb.append( j+1 ); |
| sb.append(' '); |
| sb.append( lvalue ); |
| sb.append('\n'); |
| br.write( sb.toString() ); //same as append |
| sb.setLength(0); |
| } |
| } |
| } |
| } |
| |
| //handle empty result |
| if ( src.isEmptyBlock(false) && rl==0 ) |
| br.write(IOUtilFunctions.EMPTY_TEXT_LINE); |
| } |
| } |
| } |