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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef COMPONENTS_SYNC_CORE_DATA_BATCH_IMPL_H_ | 5 #ifndef COMPONENTS_SYNC_CORE_DATA_BATCH_IMPL_H_ |
6 #define COMPONENTS_SYNC_CORE_DATA_BATCH_IMPL_H_ | 6 #define COMPONENTS_SYNC_CORE_DATA_BATCH_IMPL_H_ |
7 | 7 |
8 #include <stddef.h> | 8 #include <stddef.h> |
9 | 9 |
10 #include <memory> | 10 #include <memory> |
11 #include <string> | 11 #include <string> |
12 #include <utility> | 12 #include <utility> |
13 #include <vector> | 13 #include <vector> |
14 | 14 |
15 #include "base/macros.h" | 15 #include "base/macros.h" |
16 #include "components/sync/api/data_batch.h" | 16 #include "components/sync/api/data_batch.h" |
17 #include "components/sync/api/entity_data.h" | 17 #include "components/sync/api/entity_data.h" |
18 | 18 |
19 namespace syncer { | 19 namespace syncer_v2 { |
20 | 20 |
21 // An implementation of DataBatch that's purpose is to transfer ownership of | 21 // An implementation of DataBatch that's purpose is to transfer ownership of |
22 // EntityData objects. As soon as this batch recieves the EntityData, it owns | 22 // EntityData objects. As soon as this batch recieves the EntityData, it owns |
23 // them until Next() is invoked, when it gives up ownerhsip. Because a vector | 23 // them until Next() is invoked, when it gives up ownerhsip. Because a vector |
24 // is used internally, this impl is unaware when duplcate storage_keys are used, | 24 // is used internally, this impl is unaware when duplcate storage_keys are used, |
25 // and it is the caller's job to avoid this. | 25 // and it is the caller's job to avoid this. |
26 class DataBatchImpl : public DataBatch { | 26 class DataBatchImpl : public DataBatch { |
27 public: | 27 public: |
28 DataBatchImpl(); | 28 DataBatchImpl(); |
29 ~DataBatchImpl() override; | 29 ~DataBatchImpl() override; |
30 | 30 |
31 // Takes ownership of the data tied to a given key used for storage. Put | 31 // Takes ownership of the data tied to a given key used for storage. Put |
32 // should be called at most once for any given storfage_key. Data will be | 32 // should be called at most once for any given storfage_key. Data will be |
33 // readable in the same order that they are put into the batch. | 33 // readable in the same order that they are put into the batch. |
34 void Put(const std::string& storage_key, | 34 void Put(const std::string& storage_key, |
35 std::unique_ptr<EntityData> entity_data); | 35 std::unique_ptr<EntityData> entity_data); |
36 | 36 |
37 // DataBatch implementation. | 37 // DataBatch implementation. |
38 bool HasNext() const override; | 38 bool HasNext() const override; |
39 KeyAndData Next() override; | 39 KeyAndData Next() override; |
40 | 40 |
41 private: | 41 private: |
42 std::vector<KeyAndData> key_data_pairs_; | 42 std::vector<KeyAndData> key_data_pairs_; |
43 size_t read_index_ = 0; | 43 size_t read_index_ = 0; |
44 | 44 |
45 DISALLOW_COPY_AND_ASSIGN(DataBatchImpl); | 45 DISALLOW_COPY_AND_ASSIGN(DataBatchImpl); |
46 }; | 46 }; |
47 | 47 |
48 } // namespace syncer | 48 } // namespace syncer_v2 |
49 | 49 |
50 #endif // COMPONENTS_SYNC_CORE_DATA_BATCH_IMPL_H_ | 50 #endif // COMPONENTS_SYNC_CORE_DATA_BATCH_IMPL_H_ |
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