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