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Json: * Split Json class into several classes * Add unit tests * Json is considered usable
author David Demelier <markand@malikania.fr>
date Fri, 13 Feb 2015 13:42:21 +0100
parents 777bc3cb665a
children ea1a73a7d468
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1 /*
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2 * Json.cpp -- jansson C++11 wrapper
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3 *
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4 * Copyright (c) 2013, 2014 David Demelier <markand@malikania.fr>
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5 *
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6 * Permission to use, copy, modify, and/or distribute this software for any
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7 * purpose with or without fee is hereby granted, provided that the above
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8 * copyright notice and this permission notice appear in all copies.
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9 *
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10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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17 */
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18
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19 #include "Json.h"
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20
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21 /* --------------------------------------------------------
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22 * JsonValue implementation
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23 * -------------------------------------------------------- */
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24
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25 JsonValue::JsonValue(const JsonValue &value)
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26 : m_handle(json_deep_copy(value.m_handle.get()), json_decref)
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27 {
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28 }
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29
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30 JsonValue &JsonValue::operator=(const JsonValue &value)
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31 {
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32 m_handle = Handle(json_deep_copy(value.m_handle.get()), json_decref);
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33 }
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34
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35 JsonValue::JsonValue(json_t *json)
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36 : m_handle(json, json_decref)
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37 {
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38 }
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39
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40 JsonValue::JsonValue()
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41 : m_handle(json_null(), json_decref)
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42 {
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43 }
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44
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45 JsonValue::JsonValue(bool value)
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46 : m_handle(json_boolean(value), json_decref)
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47 {
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48 }
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49
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50 JsonValue::JsonValue(int value)
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51 : m_handle(json_integer(value), json_decref)
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52 {
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53 }
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54
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55 JsonValue::JsonValue(double value)
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56 : m_handle(json_real(value), json_decref)
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57 {
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58 }
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59
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60 JsonValue::JsonValue(std::string value)
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61 : m_handle(json_string(value.c_str()), json_decref)
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62 {
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63 }
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64
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65 JsonValue::JsonValue(const char *value)
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66 : m_handle(json_string(value), json_decref)
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67 {
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68 }
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69
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70 JsonType JsonValue::typeOf() const
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71 {
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72 return static_cast<JsonType>(json_typeof(m_handle.get()));
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73 }
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74
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75 bool JsonValue::isObject() const
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76 {
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77 return json_is_object(m_handle.get()) != 0;
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78 }
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79
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80 bool JsonValue::isArray() const
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81 {
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82 return json_is_array(m_handle.get()) != 0;
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83 }
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84
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85 bool JsonValue::isString() const
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86 {
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87 return json_is_string(m_handle.get()) != 0;
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88 }
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89
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90 bool JsonValue::isReal() const
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91 {
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92 return json_is_real(m_handle.get()) != 0;
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93 }
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94
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95 bool JsonValue::isTrue() const
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96 {
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97 return json_is_true(m_handle.get()) != 0;
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98 }
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99
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100 bool JsonValue::isFalse() const
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101 {
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102 return json_is_false(m_handle.get()) != 0;
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103 }
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104
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105 bool JsonValue::isNull() const
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106 {
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107 return json_is_null(m_handle.get()) != 0;
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108 }
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109
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110 bool JsonValue::isNumber() const
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111 {
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112 return json_is_number(m_handle.get()) != 0;
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113 }
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114
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115 bool JsonValue::isInteger() const
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116 {
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117 return json_is_integer(m_handle.get()) != 0;
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118 }
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119
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120 bool JsonValue::isBoolean() const
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121 {
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122 return json_is_boolean(m_handle.get()) != 0;
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123 }
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124
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125 std::string JsonValue::toString() const
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126 {
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127 auto value = json_string_value(m_handle.get());
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128
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129 return (value == nullptr) ? "" : value;
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130 }
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131
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132 int JsonValue::toInteger() const noexcept
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133 {
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134 return json_integer_value(m_handle.get());
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135 }
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136
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137 double JsonValue::toReal() const noexcept
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138 {
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139 return json_real_value(m_handle.get());
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140 }
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141
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142 JsonObject JsonValue::toObject() const
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143 {
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144 json_incref(m_handle.get());
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145
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146 return JsonObject(m_handle.get());
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147 }
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148
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149 JsonArray JsonValue::toArray() const
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150 {
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151 json_incref(m_handle.get());
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152
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153 return JsonArray(m_handle.get());
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154 }
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155
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156 /* --------------------------------------------------------
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157 * JsonArray
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158 * -------------------------------------------------------- */
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159
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160 JsonArray::JsonArray()
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161 : JsonValue(json_array())
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162 {
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163 }
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164
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165 unsigned JsonArray::size() const noexcept
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166 {
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167 return json_array_size(m_handle.get());
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168 }
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169
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170 void JsonArray::push(const JsonValue &value)
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171 {
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172 json_array_insert(m_handle.get(), 0, value.m_handle.get());
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173 }
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174
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175 void JsonArray::append(const JsonValue &value)
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176 {
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177 json_array_append(m_handle.get(), value.m_handle.get());
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178 }
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179
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180 void JsonArray::insert(const JsonValue &value, int index)
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181 {
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182 json_array_insert(m_handle.get(), index, value.m_handle.get());
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183 }
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184
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185 JsonValue JsonArray::operator[](int index) const
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186 {
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187 if (typeOf() != JsonType::Array)
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188 throw JsonError("not an array");
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189
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190 auto value = json_array_get(m_handle.get(), index);
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191
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192 if (value == nullptr)
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193 throw JsonError("index out of bounds");
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194
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195 json_incref(value);
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196
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197 return JsonValue(value);
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198 }
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199
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200 /* --------------------------------------------------------
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201 * JsonObject
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202 * -------------------------------------------------------- */
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203
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204 JsonObject::JsonObject()
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205 : JsonValue(json_object())
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206 {
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207 }
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208
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209 JsonValue JsonObject::operator[](const std::string &name) const
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210 {
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211 if (typeOf() != JsonType::Object)
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212 throw JsonError("not an object");
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213
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214 auto value = json_object_get(m_handle.get(), name.c_str());
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215
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216 if (value == nullptr)
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217 throw JsonError("key " + name + +" not found");
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218
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219 json_incref(value);
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220
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221 return JsonValue(value);
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222 }
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223
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224 void JsonObject::set(const std::string &key, const JsonValue &value)
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225 {
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226 json_object_set(m_handle.get(), key.c_str(), value.m_handle.get());
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227 }
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228
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229 /* --------------------------------------------------------
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230 * JsonReaderFile
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231 * -------------------------------------------------------- */
244
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232
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233 JsonReaderFile::JsonReaderFile(std::string path)
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234 : m_path(std::move(path))
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235 {
244
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236 }
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237
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238 JsonValue JsonReaderFile::read()
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239 {
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240 json_error_t error;
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241 json_t *handle = json_load_file(m_path.c_str(), 0, &error);
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242
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243 if (handle == nullptr)
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244 throw JsonError{error};
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245
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246 return JsonValue(handle);
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247 }
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248
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249 /* --------------------------------------------------------
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250 * JsonWriterFile
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251 * -------------------------------------------------------- */
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252
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253 JsonWriterFile::JsonWriterFile(std::string path)
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254 : m_path(std::move(path))
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255 {
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256 }
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257
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258 void JsonWriterFile::write(const JsonValue &value)
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259 {
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260 if (json_dump_file(value, m_path.c_str(), 0) < 0)
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261 throw JsonError("Failed to write file: " + m_path);
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262 }