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71 lines
2.3 KiB
C++
71 lines
2.3 KiB
C++
// Copyright 2022 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// https://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef THIRD_PARTY_NEARBY_INTERNAL_DATA_DATA_SET_H_
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#define THIRD_PARTY_NEARBY_INTERNAL_DATA_DATA_SET_H_
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#include <functional>
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#include <memory>
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#include <string>
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#include <utility>
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#include <vector>
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namespace nearby {
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namespace data {
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enum class InitStatus {
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kOK = 0,
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kNotInitialized = 1,
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kError = 2,
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kCorrupt = 3,
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kInvalidOperation = 4,
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kMaxValue = kInvalidOperation
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};
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template <typename T>
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class DataSet {
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public:
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using KeyEntryVector = std::vector<std::pair<std::string, T>>;
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virtual ~DataSet() = default;
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// Asynchronously initializes the object, which must have been created by the
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// DataManager::GetDataSet<T> function. |callback| will be invoked on the
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// calling thread when complete.
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virtual void Initialize(std::function<void(InitStatus)> callback) = 0;
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// Asynchronously loads all entries from the database and invokes |callback|
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// when complete.
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virtual void LoadEntries(
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std::function<void(bool, std::unique_ptr<std::vector<T>>)> callback) = 0;
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// Asynchronously saves |entries_to_save| and deletes entries from
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// |keys_to_remove| from the database. |callback| will be invoked on the
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// calling thread when complete. |entries_to_save| and |keys_to_remove| must
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// be non-null.
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virtual void UpdateEntries(
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std::unique_ptr<KeyEntryVector> entries_to_save,
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std::unique_ptr<std::vector<std::string>> keys_to_remove,
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std::function<void(bool)> callback) = 0;
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// Asynchronously destroys the database. Use this call only if the database
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// needs to be destroyed for this particular profile.
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virtual void Destroy(std::function<void(bool)> callback) = 0;
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};
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} // namespace data
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} // namespace nearby
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#endif // THIRD_PARTY_NEARBY_INTERNAL_DATA_DATA_SET_H_
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