| /* |
| * 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.BufferedReader; |
| import java.io.IOException; |
| import java.io.InputStream; |
| import java.io.InputStreamReader; |
| |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.io.LongWritable; |
| import org.apache.hadoop.io.Text; |
| import org.apache.hadoop.mapred.FileInputFormat; |
| import org.apache.hadoop.mapred.InputSplit; |
| import org.apache.hadoop.mapred.JobConf; |
| import org.apache.hadoop.mapred.RecordReader; |
| import org.apache.hadoop.mapred.Reporter; |
| import org.apache.hadoop.mapred.TextInputFormat; |
| import org.apache.sysds.conf.ConfigurationManager; |
| import org.apache.sysds.common.Types.ValueType; |
| import org.apache.sysds.runtime.DMLRuntimeException; |
| import org.apache.sysds.runtime.matrix.data.FrameBlock; |
| import org.apache.sysds.runtime.util.FastStringTokenizer; |
| import org.apache.sysds.runtime.util.UtilFunctions; |
| |
| /** |
| * Single-threaded frame textcell reader. |
| * |
| */ |
| public class FrameReaderTextCell extends FrameReader |
| { |
| @Override |
| public final FrameBlock readFrameFromHDFS(String fname, ValueType[] schema, String[] names, long rlen, long clen) |
| throws IOException, DMLRuntimeException |
| { |
| //allocate output frame block |
| ValueType[] lschema = createOutputSchema(schema, clen); |
| String[] lnames = createOutputNames(names, clen); |
| FrameBlock ret = createOutputFrameBlock(lschema, lnames, rlen); |
| |
| //prepare file access |
| JobConf job = new JobConf(ConfigurationManager.getCachedJobConf()); |
| Path path = new Path( fname ); |
| FileSystem fs = IOUtilFunctions.getFileSystem(path, job); |
| |
| //check existence and non-empty file |
| checkValidInputFile(fs, path); |
| |
| //core read (sequential/parallel) |
| readTextCellFrameFromHDFS(path, job, fs, ret, lschema, lnames, rlen, clen); |
| |
| return ret; |
| } |
| |
| @Override |
| public final FrameBlock readFrameFromInputStream(InputStream is, ValueType[] schema, String[] names, long rlen, long clen) |
| throws IOException, DMLRuntimeException |
| { |
| //allocate output frame block |
| ValueType[] lschema = createOutputSchema(schema, clen); |
| String[] lnames = createOutputNames(names, clen); |
| FrameBlock ret = createOutputFrameBlock(lschema, lnames, rlen); |
| |
| //core read |
| readRawTextCellFrameFromInputStream(is, ret, lschema, lnames, rlen, clen); |
| |
| return ret; |
| } |
| |
| protected void readTextCellFrameFromHDFS( Path path, JobConf job, FileSystem fs, FrameBlock dest, |
| ValueType[] schema, String[] names, long rlen, long clen) |
| throws IOException |
| { |
| if( fs.isDirectory(path) ) { |
| FileInputFormat.addInputPath(job, path); |
| TextInputFormat informat = new TextInputFormat(); |
| informat.configure(job); |
| InputSplit[] splits = informat.getSplits(job, 1); |
| for(InputSplit split: splits) |
| readTextCellFrameFromInputSplit(split, informat, job, dest); |
| } |
| else { |
| readRawTextCellFrameFromHDFS(path, job, fs, dest, schema, names, rlen, clen); |
| } |
| } |
| |
| protected static void readTextCellFrameFromInputSplit( InputSplit split, TextInputFormat informat, JobConf job, FrameBlock dest) |
| throws IOException |
| { |
| ValueType[] schema = dest.getSchema(); |
| int rlen = dest.getNumRows(); |
| int clen = dest.getNumColumns(); |
| |
| //create record reader |
| RecordReader<LongWritable,Text> reader = informat.getRecordReader(split, job, Reporter.NULL); |
| |
| LongWritable key = new LongWritable(); |
| Text value = new Text(); |
| FastStringTokenizer st = new FastStringTokenizer(' '); |
| int row = -1; |
| int col = -1; |
| |
| try |
| { |
| while( reader.next(key, value) ) { |
| st.reset( value.toString() ); //reinit tokenizer |
| row = st.nextInt()-1; |
| col = st.nextInt()-1; |
| if( row == -3 ) |
| dest.getColumnMetadata(col).setMvValue(st.nextToken()); |
| else if( row == -2 ) |
| dest.getColumnMetadata(col).setNumDistinct(st.nextLong()); |
| else |
| dest.set(row, col, UtilFunctions.stringToObject(schema[col], st.nextToken())); |
| } |
| } |
| catch(Exception ex) |
| { |
| //post-mortem error handling and bounds checking |
| if( row < 0 || row + 1 > rlen || col < 0 || col + 1 > clen ) { |
| throw new IOException("Frame cell ["+(row+1)+","+(col+1)+"] " + |
| "out of overall frame range [1:"+rlen+",1:"+clen+"]."); |
| } |
| else { |
| throw new IOException( "Unable to read frame in text cell format.", ex ); |
| } |
| } |
| finally { |
| IOUtilFunctions.closeSilently(reader); |
| } |
| } |
| |
| protected static void readRawTextCellFrameFromHDFS( Path path, JobConf job, FileSystem fs, FrameBlock dest, |
| ValueType[] schema, String[] names, long rlen, long clen) |
| throws IOException |
| { |
| try(InputStream inputStream = fs.open(path)) { |
| readRawTextCellFrameFromInputStream(inputStream, dest, schema, names, rlen, clen); |
| } |
| } |
| |
| protected static void readRawTextCellFrameFromInputStream( InputStream is, FrameBlock dest, ValueType[] schema, String[] names, long rlen, long clen) |
| throws IOException |
| { |
| String value = null; |
| FastStringTokenizer st = new FastStringTokenizer(' '); |
| int row = -1; |
| int col = -1; |
| |
| try (BufferedReader br = new BufferedReader(new InputStreamReader( is ))) |
| { |
| while( (value=br.readLine())!=null ) { |
| st.reset( value ); //reinit tokenizer |
| row = st.nextInt()-1; |
| col = st.nextInt()-1; |
| if( row == -3 ) |
| dest.getColumnMetadata(col).setMvValue(st.nextToken()); |
| else if (row == -2) |
| dest.getColumnMetadata(col).setNumDistinct(st.nextLong()); |
| else |
| dest.set(row, col, UtilFunctions.stringToObject(schema[col], st.nextToken())); |
| } |
| } |
| catch(Exception ex) { |
| //post-mortem error handling and bounds checking |
| if( row < 0 || row + 1 > rlen || col < 0 || col + 1 > clen ) { |
| throw new IOException("Frame cell ["+(row+1)+","+(col+1)+"] " + |
| "out of overall frame range [1:"+rlen+",1:"+clen+"].", ex); |
| } |
| else { |
| throw new IOException( "Unable to read frame in raw text cell format.", ex ); |
| } |
| } |
| } |
| } |