| OLD | NEW |
|---|
| (Empty) |
| 1 // Copyright 2012 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 COMPONENTS_SYNC_CORE_READ_NODE_H_ | |
| 6 #define COMPONENTS_SYNC_CORE_READ_NODE_H_ | |
| 7 | |
| 8 #include <stddef.h> | |
| 9 #include <stdint.h> | |
| 10 | |
| 11 #include <string> | |
| 12 | |
| 13 #include "base/compiler_specific.h" | |
| 14 #include "base/macros.h" | |
| 15 #include "components/sync/base/model_type.h" | |
| 16 #include "components/sync/core/base_node.h" | |
| 17 | |
| 18 namespace syncer { | |
| 19 | |
| 20 // ReadNode wraps a syncable::Entry to provide the functionality of a | |
| 21 // read-only BaseNode. | |
| 22 class ReadNode : public BaseNode { | |
| 23 public: | |
| 24 // Create an unpopulated ReadNode on the given transaction. Call some flavor | |
| 25 // of Init to populate the ReadNode with a database entry. | |
| 26 explicit ReadNode(const BaseTransaction* transaction); | |
| 27 ~ReadNode() override; | |
| 28 | |
| 29 // A client must use one (and only one) of the following Init variants to | |
| 30 // populate the node. | |
| 31 | |
| 32 // BaseNode implementation. | |
| 33 InitByLookupResult InitByIdLookup(int64_t id) override; | |
| 34 InitByLookupResult InitByClientTagLookup(ModelType model_type, | |
| 35 const std::string& tag) override; | |
| 36 | |
| 37 // There is always a root node, so this can't fail. The root node is | |
| 38 // never mutable, so root lookup is only possible on a ReadNode. | |
| 39 void InitByRootLookup(); | |
| 40 | |
| 41 // Returns the type root node, if it exists. This is usually created by the | |
| 42 // server during first sync. Eventually, we plan to remove support for it | |
| 43 // from the protocol and have the client create the node instead. | |
| 44 InitByLookupResult InitTypeRoot(ModelType type); | |
| 45 | |
| 46 // Returns a server-created and unique-server-tagged item. | |
| 47 // | |
| 48 // This functionality is only useful for bookmarks because only bookmarks | |
| 49 // have server-tagged items. All other server-tagged items are type root | |
| 50 // nodes, which should be looked up with InitTypeRoot(). | |
| 51 InitByLookupResult InitByTagLookupForBookmarks(const std::string& tag); | |
| 52 | |
| 53 // Returns transaction version of the last transaction where this node has | |
| 54 // been modified. | |
| 55 int64_t GetTransactionVersion() const; | |
| 56 | |
| 57 // Implementation of BaseNode's abstract virtual accessors. | |
| 58 const syncable::Entry* GetEntry() const override; | |
| 59 const BaseTransaction* GetTransaction() const override; | |
| 60 | |
| 61 protected: | |
| 62 ReadNode(); | |
| 63 | |
| 64 private: | |
| 65 void* operator new(size_t size); // Node is meant for stack use only. | |
| 66 | |
| 67 // The underlying syncable object which this class wraps. | |
| 68 syncable::Entry* entry_; | |
| 69 | |
| 70 // The sync API transaction that is the parent of this node. | |
| 71 const BaseTransaction* transaction_; | |
| 72 | |
| 73 DISALLOW_COPY_AND_ASSIGN(ReadNode); | |
| 74 }; | |
| 75 | |
| 76 } // namespace syncer | |
| 77 | |
| 78 #endif // COMPONENTS_SYNC_CORE_READ_NODE_H_ | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2407163004:
[Sync] Move some directory-related things from core/ to syncable/. (Closed)
