src/at/ac/tuwien/lsdc/util/CSVParser.java

   1 package at.ac.tuwien.lsdc.util;
   2
   3 import java.io.File;
   4 import java.io.FileReader;
   5 import java.io.IOException;
   6 import java.util.LinkedList;
   7 import java.util.List;
   8
   9 import at.ac.tuwien.lsdc.types.Application;
  10 import au.com.bytecode.opencsv.CSVReader;
  11 import au.com.bytecode.opencsv.CSVWriter;
  12
  13 public class CSVParser {
  14
  15         private static int count = 0;
  16
  17         public static LinkedList<Application> parseFile(File csvFile)
  18                         throws IOException {
  19                 CSVReader reader = new CSVReader(new FileReader(csvFile), ';',
  20                                 CSVWriter.NO_QUOTE_CHARACTER);
  21                 List<String[]> file = reader.readAll();
  22                 LinkedList<Application> apps = new LinkedList<Application>();
  23                 // start at 1 to ignore header
  24                 for (int i = 1; i < file.size(); i++) {
  25                         String[] line = file.get(i);
  26                         if (line.length != 5) {
  27                                 reader.close();
  28                                 throw new IOException("CSVParser: Not right amount of elements in line " + i + 1);
  29                         } else {
  30                                 try {
  31                                         Application a = parseLine(line);
  32                                         apps.add(a);
  33                                 } catch (NumberFormatException e) {
  34                                         reader.close();
  35                                         throw new IOException("Couldn't parse line");
  36                                 }
  37                         }
  38                 }
  39                 reader.close();
  40                 return apps;
  41         }
  42
  43         private static Application parseLine(String[] appStr)
  44                         throws NumberFormatException {
  45                 int id = count;
  46                 count++;
  47                 long timestamp = Long.parseLong(appStr[0]);
  48                 int size = Integer.parseInt(appStr[1]);
  49                 int ram = Integer.parseInt(appStr[2]);
  50                 int cpu = Integer.parseInt(appStr[3]);
  51                 int duration = Integer.parseInt(appStr[4]);
  52                 Application app = new Application(id, timestamp, size, ram, cpu,
  53                                 duration);
  54                 return app;
  55         }
  56
  57 }