| // Copyright 2018 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef COMPONENTS_SYNC_MODEL_FORWARDING_MODEL_TYPE_CONTROLLER_DELEGATE_H_ |
| #define COMPONENTS_SYNC_MODEL_FORWARDING_MODEL_TYPE_CONTROLLER_DELEGATE_H_ |
| |
| #include "base/memory/raw_ptr.h" |
| #include "components/sync/model/model_type_controller_delegate.h" |
| |
| namespace syncer { |
| |
| // Trivial implementation of ModelTypeControllerDelegate that simply forwards |
| // call to another delegate (no task posting involved). This is useful when an |
| // API requires transferring ownership, but the calling site also wants to keep |
| // ownership of the actual implementation, and can guarantee the lifetime |
| // constraints. |
| class ForwardingModelTypeControllerDelegate |
| : public ModelTypeControllerDelegate { |
| public: |
| // Except for tests, |other| must not be null and must outlive this object. |
| explicit ForwardingModelTypeControllerDelegate( |
| ModelTypeControllerDelegate* other); |
| |
| ForwardingModelTypeControllerDelegate( |
| const ForwardingModelTypeControllerDelegate&) = delete; |
| ForwardingModelTypeControllerDelegate& operator=( |
| const ForwardingModelTypeControllerDelegate&) = delete; |
| |
| ~ForwardingModelTypeControllerDelegate() override; |
| |
| // ModelTypeControllerDelegate implementation. |
| void OnSyncStarting(const DataTypeActivationRequest& request, |
| StartCallback callback) override; |
| void OnSyncStopping(SyncStopMetadataFate metadata_fate) override; |
| void GetAllNodesForDebugging(AllNodesCallback callback) override; |
| void GetTypeEntitiesCountForDebugging( |
| base::OnceCallback<void(const TypeEntitiesCount&)> callback) |
| const override; |
| void RecordMemoryUsageAndCountsHistograms() override; |
| void ClearMetadataWhileStopped() override; |
| |
| private: |
| const raw_ptr<ModelTypeControllerDelegate, DanglingAcrossTasks> other_; |
| }; |
| |
| } // namespace syncer |
| |
| #endif // COMPONENTS_SYNC_MODEL_FORWARDING_MODEL_TYPE_CONTROLLER_DELEGATE_H_ |