src/servers/registrar/Watcher.h

   1 //------------------------------------------------------------------------------
   2 //      Copyright (c) 2001-2002, OpenBeOS
   3 //
   4 //      Permission is hereby granted, free of charge, to any person obtaining a
   5 //      copy of this software and associated documentation files (the "Software"),
   6 //      to deal in the Software without restriction, including without limitation
   7 //      the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8 //      and/or sell copies of the Software, and to permit persons to whom the
   9 //      Software is furnished to do so, subject to the following conditions:
  10 //
  11 //      The above copyright notice and this permission notice shall be included in
  12 //      all copies or substantial portions of the Software.
  13 //
  14 //      THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15 //      IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16 //      FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  17 //      AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  18 //      LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  19 //      FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
  20 //      DEALINGS IN THE SOFTWARE.
  21 //
  22 //      File Name:              Watcher.h
  23 //      Author:                 Ingo Weinhold (bonefish@users.sf.net)
  24 //      Description:    A Watcher represents a target of a watching service.
  25 //                                      A WatcherFilter represents a predicate on Watchers.
  26 //------------------------------------------------------------------------------
  27
  28 #ifndef WATCHER_H
  29 #define WATCHER_H
  30
  31 #include <Messenger.h>
  32
  33 // Watcher
  34 class Watcher {
  35 public:
  36         Watcher(const BMessenger &target);
  37         virtual ~Watcher();
  38
  39         const BMessenger &Target() const;
  40
  41         virtual status_t SendMessage(BMessage *message);
  42
  43 private:
  44         BMessenger      fTarget;
  45 };
  46
  47 // WatcherFilter
  48 class WatcherFilter {
  49 public:
  50         WatcherFilter();
  51         virtual ~WatcherFilter();
  52
  53         virtual bool Filter(Watcher *watcher, BMessage *message);
  54 };
  55
  56 #endif  // WATCHER_H