1 /*
2 * Copyright (c) 2023 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 * http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16 #include "JsonReader.h"
17
18 #include <fstream>
19
20 #include "PreviewerEngineLog.h"
21 #include "json/json.h"
22
23 using namespace std;
ReadFile(const string path)24 string JsonReader::ReadFile(const string path)
25 {
26 ifstream inFile(path);
27 if (!inFile.is_open()) {
28 ELOG("JsonReader: Open json file failed.");
29 return string();
30 }
31 string jsonStr((istreambuf_iterator<char>(inFile)), istreambuf_iterator<char>());
32 inFile.close();
33 return jsonStr;
34 }
35
ParseJsonData(const string jsonStr)36 Json::Value JsonReader::ParseJsonData(const string jsonStr)
37 {
38 Json::Value val;
39 Json::CharReaderBuilder builder;
40 Json::CharReader* charReader = builder.newCharReader();
41 if (charReader == nullptr) {
42 ELOG("JsonReader: CharReader memory allocation failed.");
43 return val;
44 }
45 unique_ptr<Json::CharReader> reader(charReader);
46 if (reader.get() == nullptr) {
47 ELOG("JsonReader: CharReader get null.");
48 return val;
49 }
50 string message; // NOLINT
51 if (!reader->parse(jsonStr.data(), jsonStr.data() + jsonStr.size(), &val, &message)) {
52 ELOG("JsonReader: Failed to parse the json data, errors: %s", message.c_str());
53 }
54 return val;
55 }
56
GetString(const Json::Value & val,const string & key,const string & defaultVal)57 string JsonReader::GetString(const Json::Value& val, const string& key, const string& defaultVal)
58 {
59 if (val && val.isMember(key) && val[key].isString()) {
60 return val[key].asString();
61 }
62 ELOG("JsonReader: GetString failed, key is: %s.", key.c_str());
63 return defaultVal;
64 }
65
GetBool(const Json::Value & val,const string & key,const bool defaultVal)66 bool JsonReader::GetBool(const Json::Value& val, const string& key, const bool defaultVal)
67 {
68 if (val && val.isMember(key) && val[key].isBool()) {
69 return val[key].asBool();
70 }
71 ELOG("JsonReader: GetBool failed, key is: %s.", key.c_str());
72 return defaultVal;
73 }
74
GetInt(const Json::Value & val,const string & key,const int32_t defaultVal)75 int32_t JsonReader::GetInt(const Json::Value& val, const string& key, const int32_t defaultVal)
76 {
77 if (val && val.isMember(key) && val[key].isInt()) {
78 return val[key].asInt();
79 }
80 ELOG("JsonReader: GetInt failed, key is: %s.", key.c_str());
81 return defaultVal;
82 }
83
GetUInt(const Json::Value & val,const string & key,const uint32_t defaultVal)84 uint32_t JsonReader::GetUInt(const Json::Value& val, const string& key, const uint32_t defaultVal)
85 {
86 if (val && val.isMember(key) && val[key].isUInt()) {
87 return val[key].asUInt();
88 }
89 ELOG("JsonReader: GetUInt failed, key is: %s.", key.c_str());
90 return defaultVal;
91 }
92
GetInt64(const Json::Value & val,const string & key,const int64_t defaultVal)93 int64_t JsonReader::GetInt64(const Json::Value& val, const string& key, const int64_t defaultVal)
94 {
95 if (val && val.isMember(key) && val[key].isInt64()) {
96 return val[key].asInt64();
97 }
98 ELOG("JsonReader: GetInt64 failed, key is: %s.", key.c_str());
99 return defaultVal;
100 }
101
GetDouble(const Json::Value & val,const string & key,const double defaultVal)102 double JsonReader::GetDouble(const Json::Value& val, const string& key, const double defaultVal)
103 {
104 if (val && val.isMember(key) && val[key].isDouble()) {
105 return val[key].asDouble();
106 }
107 ELOG("JsonReader: GetDouble failed, key is: %s.", key.c_str());
108 return defaultVal;
109 }
110
GetObject(const Json::Value & val,const string & key)111 unique_ptr<Json::Value> JsonReader::GetObject(const Json::Value& val, const string& key)
112 {
113 if (val && val.isMember(key) && val[key].isObject()) {
114 return make_unique<Json::Value>(val[key]);
115 }
116 ELOG("JsonReader: GetObject failed, key is: %s.", key.c_str());
117 return make_unique<Json::Value>();
118 }
119
GetArraySize(const Json::Value & val)120 int32_t JsonReader::GetArraySize(const Json::Value& val)
121 {
122 if (val && val.isArray()) {
123 return val.size();
124 }
125 ELOG("JsonReader: GetArraySize failed.");
126 return 0;
127 }
128
GetArray(const Json::Value & val,const string & key)129 unique_ptr<Json::Value> JsonReader::GetArray(const Json::Value& val, const string& key)
130 {
131 if (val && val.isMember(key) && val[key].isArray()) {
132 return make_unique<Json::Value>(val[key]);
133 }
134 ELOG("JsonReader: GetArraySize failed, key is: %s.", key.c_str());
135 return make_unique<Json::Value>();
136 }