svetovid/next.java

   1 package svetovid;
   2
   3 import org.apache.tools.ant.BuildException;
   4 import org.apache.tools.ant.Task;
   5
   6 import java.io.*;
   7
   8 /**
   9  * Na osnovu spiska i trenutnog studenta nadji sledeceg.
  10  * cita se iz current.txt, a pise u taj i current.properties
  11  * Ovo se onda korisiti za kopiranje fajlova u buildu
  12  * (bio je task init)
  13  */
  14 public class next extends Task {
  15     private String student, group;
  16     private String current;
  17     private String file="studenti.txt";
  18     private String separator="\t";
  19     private String currentFilename="current.txt",
  20         currentProperties="current.properties";
  21
  22
  23     private void setCurrent(String c) throws Exception{
  24                 current = c;
  25                 if (current != null){
  26                                         String[] s = current.split(separator);
  27                                         if (s.length<2)
  28                                                         throw new Exception("problem setting current student name - can't split group and name");
  29                                         student = s[1];
  30                                         group = s[0];
  31                         } else {
  32                                         student = null;
  33                                         group = null;
  34                         }
  35     }
  36
  37     private void loadCurrent(){
  38         try{
  39                 File f = new File(currentFilename);
  40                 if (f.exists()){
  41                                 BufferedReader r = new BufferedReader(
  42                                                 new InputStreamReader(
  43                                                                 new FileInputStream(f)));
  44                                 setCurrent(r.readLine());
  45                                 r.close();
  46                 } else
  47                         setCurrent(null);
  48         }catch (Exception ex) {
  49                 throw new BuildException(ex);
  50         }
  51     }
  52
  53     private void saveCurrent(){
  54         try{
  55                 PrintWriter w = new PrintWriter(new FileWriter(currentFilename));
  56                 w.println(current);
  57                 w.close();
  58         }catch (Exception ex) {
  59                 throw new BuildException(ex);
  60         }
  61         //now the properties file
  62         try{
  63                 PrintWriter w = new PrintWriter(new FileWriter(currentProperties));
  64                 w.println("student.group="+group);
  65                 w.println("student.current="+student);
  66                 w.close();
  67         }catch (Exception ex) {
  68                 throw new BuildException(ex);
  69         }
  70     }
  71
  72     // The method executing the task
  73     public void execute() throws BuildException {
  74         loadCurrent();
  75         try{
  76                 BufferedReader r = new BufferedReader(new InputStreamReader(new FileInputStream(file)));
  77                 String s = r.readLine();
  78                 if (current != null) {
  79                                         while (s!=null && s.compareTo(current)!=0)
  80                                                 s= r.readLine();
  81                                         setCurrent(r.readLine());
  82                         } else {
  83                                         setCurrent(s);
  84                         }
  85                 r.close();
  86         }catch (Exception ex) {
  87                 throw new BuildException(ex);
  88         }
  89         saveCurrent();
  90     }
  91
  92     public void setSeparator(String msg) {
  93         this.separator = msg;
  94     }
  95
  96     public void setFile(String msg) {
  97         this.file = msg;
  98     }
  99
 100     public void setCurrentFilename(String msg) {
 101         this.currentFilename = msg;
 102     }
 103     public void setCurrentProperties(String msg) {
 104         this.currentProperties = msg;
 105     }
 106 }