blob: 711bc7696a7c47c77f601762d0f6c6c60a46a602 (
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
67
68
69
70
71
72
|
// Copyright 2014 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_API_ATTACHMENTS_ATTACHMENT_H_
#define SYNC_API_ATTACHMENTS_ATTACHMENT_H_
#include <stdint.h>
#include <map>
#include <vector>
#include "base/memory/ref_counted.h"
#include "base/memory/ref_counted_memory.h"
#include "base/memory/scoped_ptr.h"
#include "sync/api/attachments/attachment_id.h"
#include "sync/base/sync_export.h"
namespace syncer {
// A blob of in-memory data attached to a sync item.
//
// While Attachment objects themselves aren't immutable (they are assignable)
// the data they wrap is immutable.
//
// It is cheap to copy Attachments. Feel free to store and return by value.
class SYNC_EXPORT Attachment {
public:
Attachment(const Attachment& other);
~Attachment();
// Default copy and assignment are welcome.
// Creates an attachment with a unique id and the supplied data.
//
// Used when creating a brand new attachment.
static Attachment Create(const scoped_refptr<base::RefCountedMemory>& data);
// Creates an attachment with the supplied id and data.
//
// Used when you want to recreate a specific attachment. E.g. creating a local
// copy of an attachment that already exists on the sync server.
static Attachment CreateFromParts(
const AttachmentId& id,
const scoped_refptr<base::RefCountedMemory>& data);
// Returns this attachment's id.
const AttachmentId& GetId() const;
// Returns this attachment's data.
const scoped_refptr<base::RefCountedMemory>& GetData() const;
// Returns precomputed crc32c hash of data. In ideal case this hash is
// computed when attachment is first created. It is then passed around through
// local attachment store and attachment server. Crc is verified when
// attachment is downloaded from server or loaded from local storage.
uint32_t GetCrc32c() const;
private:
AttachmentId id_;
scoped_refptr<base::RefCountedMemory> data_;
Attachment(const AttachmentId& id,
const scoped_refptr<base::RefCountedMemory>& data);
};
typedef std::vector<syncer::Attachment> AttachmentList;
typedef std::map<AttachmentId, Attachment> AttachmentMap;
} // namespace syncer
#endif // SYNC_API_ATTACHMENTS_ATTACHMENT_H_
|
