chromeos/dbus/bluetooth_gatt_descriptor_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_descriptor_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 BluetoothGattDescriptorClient::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_descriptor::kUUIDProperty, &uuid);
  22   RegisterProperty(bluetooth_gatt_descriptor::kCharacteristicProperty,
  23                    &characteristic);
  24   RegisterProperty(bluetooth_gatt_descriptor::kValueProperty, &value);
  25 }
  26
  27 BluetoothGattDescriptorClient::Properties::~Properties() {
  28 }
  29
  30 // The BluetoothGattDescriptorClient implementation used in production.
  31 class BluetoothGattDescriptorClientImpl
  32     : public BluetoothGattDescriptorClient,
  33       public dbus::ObjectManager::Interface {
  34  public:
  35   BluetoothGattDescriptorClientImpl()
  36       : object_manager_(NULL),
  37         weak_ptr_factory_(this) {
  38   }
  39
  40   virtual ~BluetoothGattDescriptorClientImpl() {
  41     object_manager_->UnregisterInterface(
  42         bluetooth_gatt_descriptor::kBluetoothGattDescriptorInterface);
  43   }
  44
  45   // BluetoothGattDescriptorClientImpl override.
  46   virtual void AddObserver(
  47       BluetoothGattDescriptorClient::Observer* observer) OVERRIDE {
  48     DCHECK(observer);
  49     observers_.AddObserver(observer);
  50   }
  51
  52   // BluetoothGattDescriptorClientImpl override.
  53   virtual void RemoveObserver(
  54       BluetoothGattDescriptorClient::Observer* observer) OVERRIDE {
  55     DCHECK(observer);
  56     observers_.RemoveObserver(observer);
  57   }
  58
  59   // BluetoothGattDescriptorClientImpl override.
  60   virtual std::vector<dbus::ObjectPath> GetDescriptors() OVERRIDE {
  61     DCHECK(object_manager_);
  62     return object_manager_->GetObjectsWithInterface(
  63         bluetooth_gatt_descriptor::kBluetoothGattDescriptorInterface);
  64   }
  65
  66   // BluetoothGattDescriptorClientImpl 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_descriptor::kBluetoothGattDescriptorInterface));
  74   }
  75
  76   // dbus::ObjectManager::Interface override.
  77   virtual dbus::PropertySet* CreateProperties(
  78       dbus::ObjectProxy *object_proxy,
  79       const dbus::ObjectPath& object_path,
  80       const std::string& interface_name) OVERRIDE {
  81     Properties* properties = new Properties(
  82         object_proxy,
  83         interface_name,
  84         base::Bind(&BluetoothGattDescriptorClientImpl::OnPropertyChanged,
  85                    weak_ptr_factory_.GetWeakPtr(),
  86                    object_path));
  87     return static_cast<dbus::PropertySet*>(properties);
  88   }
  89
  90   // dbus::ObjectManager::Interface override.
  91   virtual void ObjectAdded(const dbus::ObjectPath& object_path,
  92                            const std::string& interface_name) OVERRIDE {
  93     VLOG(2) << "Remote GATT descriptor added: " << object_path.value();
  94     FOR_EACH_OBSERVER(BluetoothGattDescriptorClient::Observer, observers_,
  95                       GattDescriptorAdded(object_path));
  96   }
  97
  98   // dbus::ObjectManager::Interface override.
  99   virtual void ObjectRemoved(const dbus::ObjectPath& object_path,
 100                              const std::string& interface_name) OVERRIDE {
 101     VLOG(2) << "Remote GATT descriptor removed: " << object_path.value();
 102     FOR_EACH_OBSERVER(BluetoothGattDescriptorClient::Observer, observers_,
 103                       GattDescriptorRemoved(object_path));
 104   }
 105
 106  protected:
 107   // chromeos::DBusClient override.
 108   virtual void Init(dbus::Bus* bus) OVERRIDE {
 109     object_manager_ = bus->GetObjectManager(
 110         bluetooth_object_manager::kBluetoothObjectManagerServiceName,
 111         dbus::ObjectPath(
 112             bluetooth_object_manager::kBluetoothObjectManagerServicePath));
 113     object_manager_->RegisterInterface(
 114         bluetooth_gatt_descriptor::kBluetoothGattDescriptorInterface,
 115         this);
 116   }
 117
 118  private:
 119   // Called by dbus::PropertySet when a property value is changed, either by
 120   // result of a signal or response to a GetAll() or Get() call. Informs
 121   // observers.
 122   virtual void OnPropertyChanged(const dbus::ObjectPath& object_path,
 123                                  const std::string& property_name) {
 124     VLOG(2) << "Remote GATT descriptor property changed: "
 125             << object_path.value() << ": " << property_name;
 126     FOR_EACH_OBSERVER(BluetoothGattDescriptorClient::Observer, observers_,
 127                       GattDescriptorPropertyChanged(object_path,
 128                                                     property_name));
 129   }
 130
 131   dbus::ObjectManager* object_manager_;
 132
 133   // List of observers interested in event notifications from us.
 134   ObserverList<BluetoothGattDescriptorClient::Observer> observers_;
 135
 136   // Weak pointer factory for generating 'this' pointers that might live longer
 137   // than we do.
 138   // Note: This should remain the last member so it'll be destroyed and
 139   // invalidate its weak pointers before any other members are destroyed.
 140   base::WeakPtrFactory<BluetoothGattDescriptorClientImpl> weak_ptr_factory_;
 141
 142   DISALLOW_COPY_AND_ASSIGN(BluetoothGattDescriptorClientImpl);
 143 };
 144
 145 BluetoothGattDescriptorClient::BluetoothGattDescriptorClient() {
 146 }
 147
 148 BluetoothGattDescriptorClient::~BluetoothGattDescriptorClient() {
 149 }
 150
 151 // static
 152 BluetoothGattDescriptorClient* BluetoothGattDescriptorClient::Create() {
 153   return new BluetoothGattDescriptorClientImpl();
 154 }
 155
 156 }  // namespace chromeos