git.gag.com Git - fw/altos/blob - altosuilib/AltosBTKnown.java

   1 /*
   2  * Copyright © 2011 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.altosuilib_13;
  20
  21 import java.util.*;
  22 import org.altusmetrum.altoslib_13.*;
  23
  24 public class AltosBTKnown implements Iterable<AltosBTDevice> {
  25         LinkedList<AltosBTDevice>       devices = new LinkedList<AltosBTDevice>();
  26         AltosPreferencesBackend         bt_pref = AltosUIPreferences.bt_devices();
  27
  28         private String get_address(String name) {
  29                 return bt_pref.getString(name, "");
  30         }
  31
  32         private void set_address(String name, String addr) {
  33                 bt_pref.putString(name, addr);
  34         }
  35
  36         private void remove(String name) {
  37                 bt_pref.remove(name);
  38         }
  39
  40         private void load() {
  41                 try {
  42                         String[] names = bt_pref.keys();
  43                         for (int i = 0; i < names.length; i++) {
  44                                 String  name = names[i];
  45                                 String  addr = get_address(name);
  46                                 devices.add(new AltosBTDevice(name, addr));
  47                         }
  48                 } catch (IllegalStateException ie) {
  49                 }
  50         }
  51
  52         public Iterator<AltosBTDevice> iterator() {
  53                 return devices.iterator();
  54         }
  55
  56         private void flush() {
  57                 AltosUIPreferences.flush_preferences();
  58         }
  59
  60         public void set(Iterable<AltosBTDevice> new_devices) {
  61                 for (AltosBTDevice old : devices) {
  62                         boolean found = false;
  63                         for (AltosBTDevice new_device : new_devices) {
  64                                 if (new_device.equals(old)) {
  65                                         found = true;
  66                                         break;
  67                                 }
  68                         }
  69                         if (!found)
  70                                 remove(old.getName());
  71                 }
  72                 devices = new LinkedList<AltosBTDevice>();
  73                 for (AltosBTDevice new_device : new_devices) {
  74                         devices.add(new_device);
  75                         set_address(new_device.getName(), new_device.getAddr());
  76                 }
  77                 flush();
  78         }
  79
  80         public List<AltosDevice> list(int product) {
  81                 LinkedList<AltosDevice> list = new LinkedList<AltosDevice>();
  82                 for (AltosBTDevice device : devices) {
  83                         if (device.matchProduct(product))
  84                                 list.add(device);
  85                 }
  86                 return list;
  87         }
  88
  89         public AltosBTKnown() {
  90                 devices = new LinkedList<AltosBTDevice>();
  91                 bt_pref = AltosUIPreferences.bt_devices();
  92                 load();
  93         }
  94
  95         static AltosBTKnown     known;
  96
  97         static public AltosBTKnown bt_known() {
  98                 if (known == null)
  99                         known = new AltosBTKnown();
 100                 return known;
 101         }
 102 }