chromeos/network/managed_state.h

   1 // Copyright (c) 2012 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 #ifndef CHROMEOS_NETWORK_MANAGED_STATE_H_
   6 #define CHROMEOS_NETWORK_MANAGED_STATE_H_
   7
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11 #include "base/compiler_specific.h"
  12 #include "chromeos/chromeos_export.h"
  13
  14 namespace base {
  15 class Value;
  16 }
  17
  18 namespace chromeos {
  19
  20 class DeviceState;
  21 class NetworkState;
  22
  23 // Base class for states managed by NetworkStateManger which are associated
  24 // with a Shill path (e.g. service path or device path).
  25 class ManagedState {
  26  public:
  27   enum ManagedType {
  28     MANAGED_TYPE_NETWORK,
  29     MANAGED_TYPE_DEVICE
  30   };
  31
  32   virtual ~ManagedState();
  33
  34   // This will construct and return a new instance of the approprate class
  35   // based on |type|.
  36   static ManagedState* Create(ManagedType type, const std::string& path);
  37
  38   // Returns the specific class pointer if this is the correct type, or
  39   // NULL if it is not.
  40   NetworkState* AsNetworkState();
  41   DeviceState* AsDeviceState();
  42
  43   // Called by NetworkStateHandler when a property changes. Returns true if
  44   // the property was recognized and parsed successfully.
  45   virtual bool PropertyChanged(const std::string& key,
  46                                const base::Value& value) = 0;
  47
  48   const ManagedType managed_type() const { return managed_type_; }
  49   const std::string& path() const { return path_; }
  50   const std::string& name() const { return name_; }
  51   const std::string& type() const { return type_; }
  52   bool is_observed() const { return is_observed_; }
  53   void set_is_observed(bool is_observed) { is_observed_ = is_observed; }
  54
  55  protected:
  56   ManagedState(ManagedType type, const std::string& path);
  57
  58   // Parses common property keys (name, type).
  59   bool ManagedStatePropertyChanged(const std::string& key,
  60                                    const base::Value& value);
  61
  62   // Helper methods that log warnings and return false if parsing failed.
  63   bool GetBooleanValue(const std::string& key,
  64                        const base::Value& value,
  65                        bool* out_value);
  66   bool GetIntegerValue(const std::string& key,
  67                        const base::Value& value,
  68                        int* out_value);
  69   bool GetStringValue(const std::string& key,
  70                       const base::Value& value,
  71                       std::string* out_value);
  72
  73  private:
  74   ManagedType managed_type_;
  75
  76   // The path (e.g. service path or device path) of the managed state object.
  77   std::string path_;
  78
  79   // Common properties shared by all managed state objects.
  80   std::string name_;  // flimflam::kNameProperty
  81   std::string type_;  // flimflam::kTypeProperty
  82
  83   // Tracks when the state is being observed.
  84   bool is_observed_;
  85
  86   DISALLOW_COPY_AND_ASSIGN(ManagedState);
  87 };
  88
  89 }  // namespace chromeos
  90
  91 #endif  // CHROMEOS_NETWORK_MANAGED_STATE_H_