chromeos/dbus/bluetooth_gatt_characteristic_client.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "chromeos/dbus/bluetooth_gatt_characteristic_client.h"
   6
   7 #include "base/bind.h"
   8 #include "base/memory/weak_ptr.h"
   9 #include "base/observer_list.h"
  10 #include "dbus/bus.h"
  11 #include "dbus/object_manager.h"
  12 #include "third_party/cros_system_api/dbus/service_constants.h"
  13
  14 namespace chromeos {
  15
  16 BluetoothGattCharacteristicClient::Properties::Properties(
  17     dbus::ObjectProxy* object_proxy,
  18     const std::string& interface_name,
  19     const PropertyChangedCallback& callback)
  20     : dbus::PropertySet(object_proxy, interface_name, callback) {
  21   RegisterProperty(bluetooth_gatt_characteristic::kUUIDProperty, &uuid);
  22   RegisterProperty(bluetooth_gatt_characteristic::kServiceProperty, &service);
  23   RegisterProperty(bluetooth_gatt_characteristic::kValueProperty, &value);
  24   RegisterProperty(bluetooth_gatt_characteristic::kFlagsProperty, &flags);
  25 }
  26
  27 BluetoothGattCharacteristicClient::Properties::~Properties() {
  28 }
  29
  30 // The BluetoothGattCharacteristicClient implementation used in production.
  31 class BluetoothGattCharacteristicClientImpl
  32     : public BluetoothGattCharacteristicClient,
  33       public dbus::ObjectManager::Interface {
  34  public:
  35   BluetoothGattCharacteristicClientImpl()
  36       : object_manager_(NULL),
  37         weak_ptr_factory_(this) {
  38   }
  39
  40   virtual ~BluetoothGattCharacteristicClientImpl() {
  41     object_manager_->UnregisterInterface(
  42         bluetooth_gatt_characteristic::kBluetoothGattCharacteristicInterface);
  43   }
  44
  45   // BluetoothGattCharacteristicClient override.
  46   virtual void AddObserver(
  47       BluetoothGattCharacteristicClient::Observer* observer) OVERRIDE {
  48     DCHECK(observer);
  49     observers_.AddObserver(observer);
  50   }
  51
  52   // BluetoothGattCharacteristicClient override.
  53   virtual void RemoveObserver(
  54       BluetoothGattCharacteristicClient::Observer* observer) OVERRIDE {
  55     DCHECK(observer);
  56     observers_.RemoveObserver(observer);
  57   }
  58
  59   // BluetoothGattCharacteristicClient override.
  60   virtual std::vector<dbus::ObjectPath> GetCharacteristics() OVERRIDE {
  61     DCHECK(object_manager_);
  62     return object_manager_->GetObjectsWithInterface(
  63         bluetooth_gatt_characteristic::kBluetoothGattCharacteristicInterface);
  64   }
  65
  66   // BluetoothGattCharacteristicClient override.
  67   virtual Properties* GetProperties(
  68       const dbus::ObjectPath& object_path) OVERRIDE {
  69     DCHECK(object_manager_);
  70     return static_cast<Properties*>(
  71         object_manager_->GetProperties(
  72             object_path,
  73             bluetooth_gatt_characteristic::
  74                 kBluetoothGattCharacteristicInterface));
  75   }
  76
  77   // dbus::ObjectManager::Interface override.
  78   virtual dbus::PropertySet* CreateProperties(
  79       dbus::ObjectProxy *object_proxy,
  80       const dbus::ObjectPath& object_path,
  81       const std::string& interface_name) OVERRIDE {
  82     Properties* properties = new Properties(
  83         object_proxy,
  84         interface_name,
  85         base::Bind(&BluetoothGattCharacteristicClientImpl::OnPropertyChanged,
  86                    weak_ptr_factory_.GetWeakPtr(),
  87                    object_path));
  88     return static_cast<dbus::PropertySet*>(properties);
  89   }
  90
  91   // dbus::ObjectManager::Interface override.
  92   virtual void ObjectAdded(const dbus::ObjectPath& object_path,
  93                            const std::string& interface_name) OVERRIDE {
  94     VLOG(2) << "Remote GATT characteristic added: " << object_path.value();
  95     FOR_EACH_OBSERVER(BluetoothGattCharacteristicClient::Observer, observers_,
  96                       GattCharacteristicAdded(object_path));
  97   }
  98
  99   // dbus::ObjectManager::Interface override.
 100   virtual void ObjectRemoved(const dbus::ObjectPath& object_path,
 101                              const std::string& interface_name) OVERRIDE {
 102     VLOG(2) << "Remote GATT characteristic removed: " << object_path.value();
 103     FOR_EACH_OBSERVER(BluetoothGattCharacteristicClient::Observer, observers_,
 104                       GattCharacteristicRemoved(object_path));
 105   }
 106
 107  protected:
 108   // chromeos::DBusClient override.
 109   virtual void Init(dbus::Bus* bus) OVERRIDE {
 110     object_manager_ = bus->GetObjectManager(
 111         bluetooth_object_manager::kBluetoothObjectManagerServiceName,
 112         dbus::ObjectPath(
 113             bluetooth_object_manager::kBluetoothObjectManagerServicePath));
 114     object_manager_->RegisterInterface(
 115         bluetooth_gatt_characteristic::kBluetoothGattCharacteristicInterface,
 116         this);
 117   }
 118
 119  private:
 120   // Called by dbus::PropertySet when a property value is changed, either by
 121   // result of a signal or response to a GetAll() or Get() call. Informs
 122   // observers.
 123   virtual void OnPropertyChanged(const dbus::ObjectPath& object_path,
 124                                  const std::string& property_name) {
 125     VLOG(2) << "Remote GATT characteristic property changed: "
 126             << object_path.value() << ": " << property_name;
 127     FOR_EACH_OBSERVER(BluetoothGattCharacteristicClient::Observer, observers_,
 128                       GattCharacteristicPropertyChanged(object_path,
 129                                                         property_name));
 130   }
 131
 132   dbus::ObjectManager* object_manager_;
 133
 134   // List of observers interested in event notifications from us.
 135   ObserverList<BluetoothGattCharacteristicClient::Observer> observers_;
 136
 137   // Weak pointer factory for generating 'this' pointers that might live longer
 138   // than we do.
 139   // Note: This should remain the last member so it'll be destroyed and
 140   // invalidate its weak pointers before any other members are destroyed.
 141   base::WeakPtrFactory<BluetoothGattCharacteristicClientImpl>
 142       weak_ptr_factory_;
 143
 144   DISALLOW_COPY_AND_ASSIGN(BluetoothGattCharacteristicClientImpl);
 145 };
 146
 147 BluetoothGattCharacteristicClient::BluetoothGattCharacteristicClient() {
 148 }
 149
 150 BluetoothGattCharacteristicClient::~BluetoothGattCharacteristicClient() {
 151 }
 152
 153 // static
 154 BluetoothGattCharacteristicClient* BluetoothGattCharacteristicClient::Create() {
 155   return new BluetoothGattCharacteristicClientImpl();
 156 }
 157
 158 }  // namespace chromeos