util-testing/org/cacert/gigi/localisation/FileIterable.java

   1 package org.cacert.gigi.localisation;
   2
   3 import java.io.BufferedReader;
   4 import java.io.File;
   5 import java.io.FileInputStream;
   6 import java.io.IOError;
   7 import java.io.IOException;
   8 import java.io.InputStreamReader;
   9 import java.util.Iterator;
  10
  11 public class FileIterable implements Iterable<String> {
  12
  13     File f;
  14
  15     public FileIterable(File f) {
  16         this.f = f;
  17     }
  18
  19     @Override
  20     public Iterator<String> iterator() {
  21         try {
  22             return new Iterator<String>() {
  23
  24                 BufferedReader br = new BufferedReader(new InputStreamReader(new FileInputStream(f), "UTF-8"));
  25
  26                 String s = null;
  27
  28                 private void getNext() {
  29                     if (s == null) {
  30                         try {
  31                             s = br.readLine();
  32                         } catch (IOException e) {
  33                             throw new IOError(e);
  34                         }
  35                     }
  36                 }
  37
  38                 @Override
  39                 public boolean hasNext() {
  40                     getNext();
  41                     return s != null;
  42                 }
  43
  44                 @Override
  45                 public String next() {
  46                     String out = s;
  47                     s = null;
  48                     return out;
  49                 }
  50             };
  51         } catch (IOException e) {
  52             throw new IOError(e);
  53         }
  54     }
  55 }