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7c673cae | 1 | // Copyright (c) 2011-present, Facebook, Inc. All rights reserved. |
11fdf7f2 TL |
2 | // This source code is licensed under both the GPLv2 (found in the |
3 | // COPYING file in the root directory) and Apache 2.0 License | |
4 | // (found in the LICENSE.Apache file in the root directory). | |
7c673cae FG |
5 | |
6 | #ifndef ROCKSDB_LITE | |
7 | #include <assert.h> | |
8 | #include <limits> | |
9 | #include <stdint.h> | |
10 | #include "rocksdb/utilities/json_document.h" | |
11 | #include "third-party/fbson/FbsonWriter.h" | |
12 | ||
13 | namespace rocksdb { | |
14 | JSONDocumentBuilder::JSONDocumentBuilder() | |
15 | : writer_(new fbson::FbsonWriter()) { | |
16 | } | |
17 | ||
18 | JSONDocumentBuilder::JSONDocumentBuilder(fbson::FbsonOutStream* out) | |
19 | : writer_(new fbson::FbsonWriter(*out)) { | |
20 | } | |
21 | ||
22 | void JSONDocumentBuilder::Reset() { | |
23 | writer_->reset(); | |
24 | } | |
25 | ||
26 | bool JSONDocumentBuilder::WriteStartArray() { | |
27 | return writer_->writeStartArray(); | |
28 | } | |
29 | ||
30 | bool JSONDocumentBuilder::WriteEndArray() { | |
31 | return writer_->writeEndArray(); | |
32 | } | |
33 | ||
34 | bool JSONDocumentBuilder::WriteStartObject() { | |
35 | return writer_->writeStartObject(); | |
36 | } | |
37 | ||
38 | bool JSONDocumentBuilder::WriteEndObject() { | |
39 | return writer_->writeEndObject(); | |
40 | } | |
41 | ||
42 | bool JSONDocumentBuilder::WriteKeyValue(const std::string& key, | |
43 | const JSONDocument& value) { | |
44 | assert(key.size() <= std::numeric_limits<uint8_t>::max()); | |
45 | size_t bytesWritten = writer_->writeKey(key.c_str(), | |
46 | static_cast<uint8_t>(key.size())); | |
47 | if (bytesWritten == 0) { | |
48 | return false; | |
49 | } | |
50 | return WriteJSONDocument(value); | |
51 | } | |
52 | ||
53 | bool JSONDocumentBuilder::WriteJSONDocument(const JSONDocument& value) { | |
54 | switch (value.type()) { | |
55 | case JSONDocument::kNull: | |
56 | return writer_->writeNull() != 0; | |
57 | case JSONDocument::kInt64: | |
58 | return writer_->writeInt64(value.GetInt64()); | |
59 | case JSONDocument::kDouble: | |
60 | return writer_->writeDouble(value.GetDouble()); | |
61 | case JSONDocument::kBool: | |
62 | return writer_->writeBool(value.GetBool()); | |
63 | case JSONDocument::kString: | |
64 | { | |
65 | bool res = writer_->writeStartString(); | |
66 | if (!res) { | |
67 | return false; | |
68 | } | |
69 | const std::string& str = value.GetString(); | |
70 | res = writer_->writeString(str.c_str(), | |
71 | static_cast<uint32_t>(str.size())); | |
72 | if (!res) { | |
73 | return false; | |
74 | } | |
75 | return writer_->writeEndString(); | |
76 | } | |
77 | case JSONDocument::kArray: | |
78 | { | |
79 | bool res = WriteStartArray(); | |
80 | if (!res) { | |
81 | return false; | |
82 | } | |
83 | for (size_t i = 0; i < value.Count(); ++i) { | |
84 | res = WriteJSONDocument(value[i]); | |
85 | if (!res) { | |
86 | return false; | |
87 | } | |
88 | } | |
89 | return WriteEndArray(); | |
90 | } | |
91 | case JSONDocument::kObject: | |
92 | { | |
93 | bool res = WriteStartObject(); | |
94 | if (!res) { | |
95 | return false; | |
96 | } | |
97 | for (auto keyValue : value.Items()) { | |
98 | WriteKeyValue(keyValue.first, keyValue.second); | |
99 | } | |
100 | return WriteEndObject(); | |
101 | } | |
102 | default: | |
103 | assert(false); | |
104 | } | |
105 | return false; | |
106 | } | |
107 | ||
108 | JSONDocument JSONDocumentBuilder::GetJSONDocument() { | |
109 | fbson::FbsonValue* value = | |
110 | fbson::FbsonDocument::createValue(writer_->getOutput()->getBuffer(), | |
111 | static_cast<uint32_t>(writer_->getOutput()->getSize())); | |
112 | return JSONDocument(value, true); | |
113 | } | |
114 | ||
115 | JSONDocumentBuilder::~JSONDocumentBuilder() { | |
116 | } | |
117 | ||
118 | } // namespace rocksdb | |
119 | ||
120 | #endif // ROCKSDB_LITE |