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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 | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef SYNC_API_ENTITY_DATA_H_ | |
6 #define SYNC_API_ENTITY_DATA_H_ | |
7 | |
8 #include <map> | |
9 #include <string> | |
10 #include <vector> | |
11 | |
12 #include "base/macros.h" | |
13 #include "base/time/time.h" | |
14 #include "sync/base/sync_export.h" | |
15 #include "sync/internal_api/public/util/proto_value_ptr.h" | |
16 #include "sync/protocol/sync.pb.h" | |
17 | |
18 namespace syncer_v2 { | |
19 | |
20 struct EntityData; | |
21 | |
22 struct SYNC_EXPORT EntityDataTraits { | |
23 static void SwapValue(EntityData* dest, EntityData* src); | |
24 static bool HasValue(const EntityData& value); | |
25 static const EntityData& DefaultValue(); | |
26 }; | |
27 | |
28 typedef syncer::ProtoValuePtr<EntityData, EntityDataTraits> EntityDataPtr; | |
29 typedef std::vector<EntityDataPtr> EntityDataList; | |
30 typedef std::map<std::string, EntityDataPtr> EntityDataMap; | |
31 | |
32 // A light-weight container for sync entity data which represents either | |
33 // local data created on the ModelTypeService side or remote data created | |
34 // on ModelTypeWorker. | |
35 // EntityData is supposed to be wrapped and passed by reference. | |
36 struct SYNC_EXPORT EntityData { | |
37 public: | |
38 EntityData(); | |
39 ~EntityData(); | |
40 | |
41 // Typically this is a server assigned sync ID, although for a local change | |
42 // that represents a new entity this field might be either empty or contain | |
43 // a temporary client sync ID. | |
44 std::string id; | |
45 | |
46 // A hash based on the client tag and model type. | |
47 // Used for various map lookups. Should always be available. | |
48 // Sent to the server as SyncEntity::client_defined_unique_tag. | |
49 std::string client_tag_hash; | |
50 | |
51 // Entity name, used mostly for Debug purposes. | |
52 std::string non_unique_name; | |
53 | |
54 // Model type specific sync data. | |
55 sync_pb::EntitySpecifics specifics; | |
56 | |
57 // Entity creation and modification timestamps. | |
58 base::Time creation_time; | |
59 base::Time modification_time; | |
60 | |
61 // Sync ID of the parent entity. This is supposed to be set only for | |
62 // hierarchical datatypes (e.g. Bookmarks). | |
63 std::string parent_id; | |
64 | |
65 // Unique position of an entity among its siblings. This is supposed to be | |
66 // set only for datatypes that support positioning (e.g. Bookmarks). | |
67 sync_pb::UniquePosition unique_position; | |
68 | |
69 // True if EntityData represents deleted entity; otherwise false. | |
70 // Note that EntityData would be considered to represent a deletion if its | |
71 // specifics hasn't been set. | |
72 bool is_deleted() const { return specifics.ByteSize() == 0; } | |
73 | |
74 // Transfers this struct's data to EntityDataPtr. | |
75 // The return value must be assigned into another EntityDataPtr. | |
76 EntityDataPtr PassToPtr() WARN_UNUSED_RESULT; | |
77 | |
78 private: | |
79 friend struct EntityDataTraits; | |
80 // Used to transfer the data without copying. | |
81 void Swap(EntityData* other); | |
82 | |
83 DISALLOW_COPY_AND_ASSIGN(EntityData); | |
84 }; | |
85 | |
86 } // namespace syncer_v2 | |
87 | |
88 #endif // SYNC_API_ENTITY_DATA_H_ | |
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