git.gag.com Git - fw/altos/blob - altoslib/AltosTelemetryIterable.java

   1 /*
   2  * Copyright © 2010 Keith Packard <keithp@keithp.com>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 2 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but
  10  * WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License along
  15  * with this program; if not, write to the Free Software Foundation, Inc.,
  16  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  17  */
  18
  19 package org.altusmetrum.altoslib_11;
  20
  21 import java.io.*;
  22 import java.util.*;
  23 import java.text.*;
  24
  25 class AltosTelemetryOrdered implements Comparable<AltosTelemetryOrdered> {
  26         AltosTelemetry  telem;
  27         int             index;
  28         int             tick;
  29
  30         public int compareTo(AltosTelemetryOrdered o) {
  31                 int     tick_diff = tick - o.tick;
  32
  33                 if (tick_diff != 0)
  34                         return tick_diff;
  35                 return index - o.index;
  36         }
  37
  38         AltosTelemetryOrdered (AltosTelemetry telem, int index, int tick) {
  39                 this.telem = telem;
  40                 this.index = index;
  41                 this.tick = tick;
  42         }
  43 }
  44
  45 class AltosTelemetryOrderedIterator implements Iterator<AltosTelemetry> {
  46         Iterator<AltosTelemetryOrdered> iterator;
  47
  48         public AltosTelemetryOrderedIterator(TreeSet<AltosTelemetryOrdered> telems) {
  49                 iterator = telems.iterator();
  50         }
  51
  52         public boolean hasNext() {
  53                 return iterator.hasNext();
  54         }
  55
  56         public AltosTelemetry next() {
  57                 return iterator.next().telem;
  58         }
  59
  60         public void remove () {
  61         }
  62 }
  63
  64 public class AltosTelemetryIterable implements Iterable<AltosTelemetry> {
  65         TreeSet<AltosTelemetryOrdered>  telems;
  66         int tick;
  67         int index;
  68
  69         public void add (AltosTelemetry telem) {
  70                 int     t = telem.tick;
  71                 if (!telems.isEmpty()) {
  72                         while (t < tick - 1000)
  73                                 t += 65536;
  74                 }
  75                 tick = t;
  76                 telems.add(new AltosTelemetryOrdered(telem, index++, tick));
  77         }
  78
  79         public Iterator<AltosTelemetry> iterator () {
  80                 return new AltosTelemetryOrderedIterator(telems);
  81         }
  82
  83         public AltosTelemetryIterable (FileInputStream input) {
  84                 telems = new TreeSet<AltosTelemetryOrdered> ();
  85                 tick = 0;
  86                 index = 0;
  87
  88                 try {
  89                         for (;;) {
  90                                 String line = AltosLib.gets(input);
  91                                 if (line == null) {
  92                                         break;
  93                                 }
  94                                 try {
  95                                         AltosTelemetry telem = AltosTelemetry.parse(line);
  96                                         if (telem == null)
  97                                                 break;
  98                                         add(telem);
  99                                 } catch (ParseException pe) {
 100                                         System.out.printf("parse exception %s\n", pe.getMessage());
 101                                 } catch (AltosCRCException ce) {
 102                                 }
 103                         }
 104                 } catch (IOException io) {
 105                         System.out.printf("io exception\n");
 106                 }
 107         }
 108 }