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_2.*;
  21 import org.altusmetrum.altosuilib_1.*;
  22
  23 public class AltosBTKnown implements Iterable<AltosBTDevice> {
  24         LinkedList<AltosBTDevice>       devices = new LinkedList<AltosBTDevice>();
  25         AltosPreferencesBackend         bt_pref = AltosUIPreferences.bt_devices();
  26
  27         private String get_address(String name) {
  28                 return bt_pref.getString(name, "");
  29         }
  30
  31         private void set_address(String name, String addr) {
  32                 bt_pref.putString(name, addr);
  33         }
  34
  35         private void remove(String name) {
  36                 bt_pref.remove(name);
  37         }
  38
  39         private void load() {
  40                 try {
  41                         String[] names = bt_pref.keys();
  42                         for (int i = 0; i < names.length; i++) {
  43                                 String  name = names[i];
  44                                 String  addr = get_address(name);
  45                                 devices.add(new AltosBTDevice(name, addr));
  46                         }
  47                 } catch (IllegalStateException ie) {
  48                 }
  49         }
  50
  51         public Iterator<AltosBTDevice> iterator() {
  52                 return devices.iterator();
  53         }
  54
  55         private void flush() {
  56                 AltosUIPreferences.flush_preferences();
  57         }
  58
  59         public void set(Iterable<AltosBTDevice> new_devices) {
  60                 for (AltosBTDevice old : devices) {
  61                         boolean found = false;
  62                         for (AltosBTDevice new_device : new_devices) {
  63                                 if (new_device.equals(old)) {
  64                                         found = true;
  65                                         break;
  66                                 }
  67                         }
  68                         if (!found)
  69                                 remove(old.getName());
  70                 }
  71                 devices = new LinkedList<AltosBTDevice>();
  72                 for (AltosBTDevice new_device : new_devices) {
  73                         devices.add(new_device);
  74                         set_address(new_device.getName(), new_device.getAddr());
  75                 }
  76                 flush();
  77         }
  78
  79         public List<AltosDevice> list(int product) {
  80                 LinkedList<AltosDevice> list = new LinkedList<AltosDevice>();
  81                 for (AltosBTDevice device : devices) {
  82                         if (device.matchProduct(product))
  83                                 list.add(device);
  84                 }
  85                 return list;
  86         }
  87
  88         public AltosBTKnown() {
  89                 devices = new LinkedList<AltosBTDevice>();
  90                 bt_pref = AltosUIPreferences.bt_devices();
  91                 load();
  92         }
  93
  94         static AltosBTKnown     known;
  95
  96         static public AltosBTKnown bt_known() {
  97                 if (known == null)
  98                         known = new AltosBTKnown();
  99                 return known;
 100         }
 101 }