git.gag.com Git - fw/altos/blob - altosui/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; version 2 of the License.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  16  */
  17
  18 package altosui;
  19 import java.util.*;
  20 import org.altusmetrum.AltosLib.*;
  21
  22 public class AltosBTKnown implements Iterable<AltosBTDevice> {
  23         LinkedList<AltosBTDevice>       devices = new LinkedList<AltosBTDevice>();
  24         AltosPreferencesBackend         bt_pref = AltosUIPreferences.bt_devices();
  25
  26         private String get_address(String name) {
  27                 return bt_pref.getString(name, "");
  28         }
  29
  30         private void set_address(String name, String addr) {
  31                 bt_pref.putString(name, addr);
  32         }
  33
  34         private void remove(String name) {
  35                 bt_pref.remove(name);
  36         }
  37
  38         private void load() {
  39                 try {
  40                         String[] names = bt_pref.keys();
  41                         for (int i = 0; i < names.length; i++) {
  42                                 String  name = names[i];
  43                                 String  addr = get_address(name);
  44                                 devices.add(new AltosBTDevice(name, addr));
  45                         }
  46                 } catch (IllegalStateException ie) {
  47                 }
  48         }
  49
  50         public Iterator<AltosBTDevice> iterator() {
  51                 return devices.iterator();
  52         }
  53
  54         private void flush() {
  55                 AltosUIPreferences.flush_preferences();
  56         }
  57
  58         public void set(Iterable<AltosBTDevice> new_devices) {
  59                 for (AltosBTDevice old : devices) {
  60                         boolean found = false;
  61                         for (AltosBTDevice new_device : new_devices) {
  62                                 if (new_device.equals(old)) {
  63                                         found = true;
  64                                         break;
  65                                 }
  66                         }
  67                         if (!found)
  68                                 remove(old.getName());
  69                 }
  70                 devices = new LinkedList<AltosBTDevice>();
  71                 for (AltosBTDevice new_device : new_devices) {
  72                         devices.add(new_device);
  73                         set_address(new_device.getName(), new_device.getAddr());
  74                 }
  75                 flush();
  76         }
  77
  78         public List<AltosDevice> list(int product) {
  79                 LinkedList<AltosDevice> list = new LinkedList<AltosDevice>();
  80                 for (AltosBTDevice device : devices) {
  81                         if (device.matchProduct(product))
  82                                 list.add(device);
  83                 }
  84                 return list;
  85         }
  86
  87         public AltosBTKnown() {
  88                 devices = new LinkedList<AltosBTDevice>();
  89                 bt_pref = AltosUIPreferences.bt_devices();
  90                 load();
  91         }
  92
  93         static AltosBTKnown     known;
  94
  95         static public AltosBTKnown bt_known() {
  96                 if (known == null)
  97                         known = new AltosBTKnown();
  98                 return known;
  99         }
 100 }