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.lang.*;
  20 import java.util.*;
  21 import libaltosJNI.*;
  22 import java.util.prefs.*;
  23
  24 public class AltosBTKnown implements Iterable<AltosBTDevice> {
  25         LinkedList<AltosBTDevice>       devices = new LinkedList<AltosBTDevice>();
  26         Preferences                     bt_pref = AltosUIPreferences.bt_devices();
  27
  28         private String get_address(String name) {
  29                 return bt_pref.get(name, "");
  30         }
  31
  32         private void set_address(String name, String addr) {
  33                 bt_pref.put(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 (BackingStoreException be) {
  49                 } catch (IllegalStateException ie) {
  50                 }
  51         }
  52
  53         public Iterator<AltosBTDevice> iterator() {
  54                 return devices.iterator();
  55         }
  56
  57         private void flush() {
  58                 AltosUIPreferences.flush_preferences();
  59         }
  60
  61         public void set(Iterable<AltosBTDevice> new_devices) {
  62                 for (AltosBTDevice old : devices) {
  63                         boolean found = false;
  64                         for (AltosBTDevice new_device : new_devices) {
  65                                 if (new_device.equals(old)) {
  66                                         found = true;
  67                                         break;
  68                                 }
  69                         }
  70                         if (!found)
  71                                 remove(old.getName());
  72                 }
  73                 devices = new LinkedList<AltosBTDevice>();
  74                 for (AltosBTDevice new_device : new_devices) {
  75                         devices.add(new_device);
  76                         set_address(new_device.getName(), new_device.getAddr());
  77                 }
  78                 flush();
  79         }
  80
  81         public List<AltosDevice> list(int product) {
  82                 LinkedList<AltosDevice> list = new LinkedList<AltosDevice>();
  83                 for (AltosBTDevice device : devices) {
  84                         if (device.matchProduct(product))
  85                                 list.add(device);
  86                 }
  87                 return list;
  88         }
  89
  90         public AltosBTKnown() {
  91                 devices = new LinkedList<AltosBTDevice>();
  92                 bt_pref = AltosUIPreferences.bt_devices();
  93                 load();
  94         }
  95
  96         static AltosBTKnown     known;
  97
  98         static public AltosBTKnown bt_known() {
  99                 if (known == null)
 100                         known = new AltosBTKnown();
 101                 return known;
 102         }
 103 }