org.argeo.slc.example/src/main/java/org/argeo/slc/example/appli/ExampleAppli.java

   1 package org.argeo.slc.example.appli;
   2
   3 import java.io.BufferedReader;
   4 import java.io.FileReader;
   5 import java.io.FileWriter;
   6 import java.io.IOException;
   7
   8 /** Example appli. */
   9 public class ExampleAppli {
  10         private int skipFreq = 2;
  11
  12         /** Filters. */
  13         public void filter(String[] args) {
  14                 if (args.length < 2) {
  15                         throw new RuntimeException(
  16                                         "Not enough arguments. Usage: <inpuit file> <output file>");
  17                 }
  18                 String input = args[0];
  19                 String output = args[1];
  20                 if (args.length > 2) {
  21                         skipFreq = Integer.parseInt(args[2]);
  22                 }
  23
  24                 try {
  25                         BufferedReader in = new BufferedReader(new FileReader(input));
  26                         FileWriter out = new FileWriter(output);
  27                         int count = 0;
  28                         String line;
  29                         while ((line = in.readLine()) != null) {
  30                                 if (count % skipFreq != 0) {
  31                                         out.write(line);
  32                                         out.write("\n");
  33                                 }
  34                                 count++;
  35                         }
  36                         out.close();
  37                         in.close();
  38                 } catch (IOException e) {
  39                         throw new RuntimeException("Appli failed", e);
  40                 }
  41         }
  42
  43         /** Sets the frequency of the lines to skip. */
  44         public void setSkipFreq(int skipFreq) {
  45                 this.skipFreq = skipFreq;
  46         }
  47
  48 }