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

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