components/sync_driver/proxy_data_type_controller.h

// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_SYNC_DRIVER_PROXY_DATA_TYPE_CONTROLLER_H__
#define COMPONENTS_SYNC_DRIVER_PROXY_DATA_TYPE_CONTROLLER_H__

#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "components/sync_driver/data_type_controller.h"

namespace browser_sync {

// Implementation for proxy datatypes. These are datatype that have no
// representation in sync, and therefore no change processor or syncable
// service.
class ProxyDataTypeController : public DataTypeController {
 public:
  explicit ProxyDataTypeController(
       scoped_refptr<base::MessageLoopProxy> ui_thread,
       syncer::ModelType type);

  // DataTypeController interface.
  virtual void LoadModels(
      const ModelLoadCallback& model_load_callback) OVERRIDE;
  virtual void StartAssociating(const StartCallback& start_callback) OVERRIDE;
  virtual void Stop() OVERRIDE;
  virtual syncer::ModelType type() const OVERRIDE;
  virtual syncer::ModelSafeGroup model_safe_group() const OVERRIDE;
  virtual ChangeProcessor* GetChangeProcessor() const OVERRIDE;
  virtual std::string name() const OVERRIDE;
  virtual State state() const OVERRIDE;

  // DataTypeErrorHandler interface.
  virtual void OnSingleDatatypeUnrecoverableError(
      const tracked_objects::Location& from_here,
      const std::string& message) OVERRIDE;

 protected:
  // DataTypeController is RefCounted.
  virtual ~ProxyDataTypeController();

  // DataTypeController interface.
  virtual void OnModelLoaded() OVERRIDE;

 private:
  State state_;

  // The actual type for this controller.
  syncer::ModelType type_;

  DISALLOW_COPY_AND_ASSIGN(ProxyDataTypeController);
};

}  // namespace browser_sync

#endif  // COMPONENTS_SYNC_DRIVER_PROXY_DATA_TYPE_CONTROLLER_H__