blob: 50e7639e29bb44d0e3cbfe81dcaaf8371eca6c1e (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
// Copyright 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef SYNC_INTERNAL_API_PUBLIC_READ_NODE_H_
#define SYNC_INTERNAL_API_PUBLIC_READ_NODE_H_
#include <string>
#include "base/basictypes.h"
#include "base/compiler_specific.h"
#include "sync/base/sync_export.h"
#include "sync/internal_api/public/base/model_type.h"
#include "sync/internal_api/public/base_node.h"
namespace syncer {
// ReadNode wraps a syncable::Entry to provide the functionality of a
// read-only BaseNode.
class SYNC_EXPORT ReadNode : public BaseNode {
public:
// Create an unpopulated ReadNode on the given transaction. Call some flavor
// of Init to populate the ReadNode with a database entry.
explicit ReadNode(const BaseTransaction* transaction);
virtual ~ReadNode();
// A client must use one (and only one) of the following Init variants to
// populate the node.
// BaseNode implementation.
virtual InitByLookupResult InitByIdLookup(int64 id) OVERRIDE;
virtual InitByLookupResult InitByClientTagLookup(
ModelType model_type,
const std::string& tag) OVERRIDE;
// There is always a root node, so this can't fail. The root node is
// never mutable, so root lookup is only possible on a ReadNode.
void InitByRootLookup();
// Each server-created permanent node is tagged with a unique string.
// Look up the node with the particular tag. If it does not exist,
// return false.
InitByLookupResult InitByTagLookup(const std::string& tag);
// Implementation of BaseNode's abstract virtual accessors.
virtual const syncable::Entry* GetEntry() const OVERRIDE;
virtual const BaseTransaction* GetTransaction() const OVERRIDE;
protected:
ReadNode();
private:
void* operator new(size_t size); // Node is meant for stack use only.
// The underlying syncable object which this class wraps.
syncable::Entry* entry_;
// The sync API transaction that is the parent of this node.
const BaseTransaction* transaction_;
DISALLOW_COPY_AND_ASSIGN(ReadNode);
};
} // namespace syncer
#endif // SYNC_INTERNAL_API_PUBLIC_READ_NODE_H_
|
