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| 1 // Copyright 2012 The Chromium Authors. All rights reserved. | 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 | 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 SYNC_INTERNAL_API_PUBLIC_READ_NODE_H_ | 5 #ifndef SYNC_INTERNAL_API_PUBLIC_READ_NODE_H_ |
| 6 #define SYNC_INTERNAL_API_PUBLIC_READ_NODE_H_ | 6 #define SYNC_INTERNAL_API_PUBLIC_READ_NODE_H_ |
| 7 | 7 |
| 8 #include <stddef.h> |
| 9 #include <stdint.h> |
| 10 |
| 8 #include <string> | 11 #include <string> |
| 9 | 12 |
| 10 #include "base/basictypes.h" | |
| 11 #include "base/compiler_specific.h" | 13 #include "base/compiler_specific.h" |
| 14 #include "base/macros.h" |
| 12 #include "sync/base/sync_export.h" | 15 #include "sync/base/sync_export.h" |
| 13 #include "sync/internal_api/public/base/model_type.h" | 16 #include "sync/internal_api/public/base/model_type.h" |
| 14 #include "sync/internal_api/public/base_node.h" | 17 #include "sync/internal_api/public/base_node.h" |
| 15 | 18 |
| 16 namespace syncer { | 19 namespace syncer { |
| 17 | 20 |
| 18 // ReadNode wraps a syncable::Entry to provide the functionality of a | 21 // ReadNode wraps a syncable::Entry to provide the functionality of a |
| 19 // read-only BaseNode. | 22 // read-only BaseNode. |
| 20 class SYNC_EXPORT ReadNode : public BaseNode { | 23 class SYNC_EXPORT ReadNode : public BaseNode { |
| 21 public: | 24 public: |
| 22 // Create an unpopulated ReadNode on the given transaction. Call some flavor | 25 // Create an unpopulated ReadNode on the given transaction. Call some flavor |
| 23 // of Init to populate the ReadNode with a database entry. | 26 // of Init to populate the ReadNode with a database entry. |
| 24 explicit ReadNode(const BaseTransaction* transaction); | 27 explicit ReadNode(const BaseTransaction* transaction); |
| 25 ~ReadNode() override; | 28 ~ReadNode() override; |
| 26 | 29 |
| 27 // A client must use one (and only one) of the following Init variants to | 30 // A client must use one (and only one) of the following Init variants to |
| 28 // populate the node. | 31 // populate the node. |
| 29 | 32 |
| 30 // BaseNode implementation. | 33 // BaseNode implementation. |
| 31 InitByLookupResult InitByIdLookup(int64 id) override; | 34 InitByLookupResult InitByIdLookup(int64_t id) override; |
| 32 InitByLookupResult InitByClientTagLookup(ModelType model_type, | 35 InitByLookupResult InitByClientTagLookup(ModelType model_type, |
| 33 const std::string& tag) override; | 36 const std::string& tag) override; |
| 34 | 37 |
| 35 // There is always a root node, so this can't fail. The root node is | 38 // There is always a root node, so this can't fail. The root node is |
| 36 // never mutable, so root lookup is only possible on a ReadNode. | 39 // never mutable, so root lookup is only possible on a ReadNode. |
| 37 void InitByRootLookup(); | 40 void InitByRootLookup(); |
| 38 | 41 |
| 39 // Returns the type root node, if it exists. This is usually created by the | 42 // Returns the type root node, if it exists. This is usually created by the |
| 40 // server during first sync. Eventually, we plan to remove support for it | 43 // server during first sync. Eventually, we plan to remove support for it |
| 41 // from the protocol and have the client create the node instead. | 44 // from the protocol and have the client create the node instead. |
| 42 InitByLookupResult InitTypeRoot(ModelType type); | 45 InitByLookupResult InitTypeRoot(ModelType type); |
| 43 | 46 |
| 44 // Returns a server-created and unique-server-tagged item. | 47 // Returns a server-created and unique-server-tagged item. |
| 45 // | 48 // |
| 46 // This functionality is only useful for bookmarks because only bookmarks | 49 // This functionality is only useful for bookmarks because only bookmarks |
| 47 // have server-tagged items. All other server-tagged items are type root | 50 // have server-tagged items. All other server-tagged items are type root |
| 48 // nodes, which should be looked up with InitTypeRoot(). | 51 // nodes, which should be looked up with InitTypeRoot(). |
| 49 InitByLookupResult InitByTagLookupForBookmarks(const std::string& tag); | 52 InitByLookupResult InitByTagLookupForBookmarks(const std::string& tag); |
| 50 | 53 |
| 51 // Returns transaction version of the last transaction where this node has | 54 // Returns transaction version of the last transaction where this node has |
| 52 // been modified. | 55 // been modified. |
| 53 int64 GetTransactionVersion() const; | 56 int64_t GetTransactionVersion() const; |
| 54 | 57 |
| 55 // Implementation of BaseNode's abstract virtual accessors. | 58 // Implementation of BaseNode's abstract virtual accessors. |
| 56 const syncable::Entry* GetEntry() const override; | 59 const syncable::Entry* GetEntry() const override; |
| 57 const BaseTransaction* GetTransaction() const override; | 60 const BaseTransaction* GetTransaction() const override; |
| 58 | 61 |
| 59 protected: | 62 protected: |
| 60 ReadNode(); | 63 ReadNode(); |
| 61 | 64 |
| 62 private: | 65 private: |
| 63 void* operator new(size_t size); // Node is meant for stack use only. | 66 void* operator new(size_t size); // Node is meant for stack use only. |
| 64 | 67 |
| 65 // The underlying syncable object which this class wraps. | 68 // The underlying syncable object which this class wraps. |
| 66 syncable::Entry* entry_; | 69 syncable::Entry* entry_; |
| 67 | 70 |
| 68 // The sync API transaction that is the parent of this node. | 71 // The sync API transaction that is the parent of this node. |
| 69 const BaseTransaction* transaction_; | 72 const BaseTransaction* transaction_; |
| 70 | 73 |
| 71 DISALLOW_COPY_AND_ASSIGN(ReadNode); | 74 DISALLOW_COPY_AND_ASSIGN(ReadNode); |
| 72 }; | 75 }; |
| 73 | 76 |
| 74 } // namespace syncer | 77 } // namespace syncer |
| 75 | 78 |
| 76 #endif // SYNC_INTERNAL_API_PUBLIC_READ_NODE_H_ | 79 #endif // SYNC_INTERNAL_API_PUBLIC_READ_NODE_H_ |
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