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annotate Plugins/Samples/Common/FullOrthancDataset.cpp @ 2179:de32f3b4ff09

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shared toolbox to access DICOM datasets from plugins
author Sebastien Jodogne <s.jodogne@gmail.com>
date Fri, 25 Nov 2016 16:11:44 +0100
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children 71b8bec8ca91
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2179
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 *
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6 * This program is free software: you can redistribute it and/or
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7 * modify it under the terms of the GNU General Public License as
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8 * published by the Free Software Foundation, either version 3 of the
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9 * License, or (at your option) any later version.
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10 *
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11 * In addition, as a special exception, the copyright holders of this
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12 * program give permission to link the code of its release with the
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13 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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14 * that use the same license as the "OpenSSL" library), and distribute
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15 * the linked executables. You must obey the GNU General Public License
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16 * in all respects for all of the code used other than "OpenSSL". If you
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17 * modify file(s) with this exception, you may extend this exception to
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18 * your version of the file(s), but you are not obligated to do so. If
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19 * you do not wish to do so, delete this exception statement from your
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20 * version. If you delete this exception statement from all source files
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21 * in the program, then also delete it here.
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22 *
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23 * This program is distributed in the hope that it will be useful, but
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24 * WITHOUT ANY WARRANTY; without even the implied warranty of
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25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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26 * General Public License for more details.
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27 *
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28 * You should have received a copy of the GNU General Public License
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29 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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30 **/
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31
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32
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33 #include "FullOrthancDataset.h"
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34
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35 #include "OrthancPluginCppWrapper.h"
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36
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37 #include <json/reader.h>
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38
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39 namespace OrthancPlugins
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40 {
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41 void FullOrthancDataset::Parse(const std::string& source)
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42 {
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43 Json::Reader reader;
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44
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45 if (!reader.parse(source, root_) ||
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46 root_.type() != Json::objectValue)
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47 {
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48 ORTHANC_PLUGINS_THROW_EXCEPTION(OrthancPluginErrorCode_BadFileFormat);
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49 }
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50 }
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51
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52
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53 static const Json::Value* AccessTag(const Json::Value& dataset,
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54 const DicomTag& tag)
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55 {
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56 if (dataset.type() != Json::objectValue)
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57 {
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58 ORTHANC_PLUGINS_THROW_EXCEPTION(OrthancPluginErrorCode_BadFileFormat);
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59 }
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60
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61 char name[16];
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62 sprintf(name, "%04x,%04x", tag.GetGroup(), tag.GetElement());
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63
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64 if (!dataset.isMember(name))
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65 {
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66 return NULL;
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67 }
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68
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69 const Json::Value& value = dataset[name];
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70 if (value.type() != Json::objectValue ||
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71 !value.isMember("Name") ||
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72 !value.isMember("Type") ||
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73 !value.isMember("Value") ||
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74 value["Name"].type() != Json::stringValue ||
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75 value["Type"].type() != Json::stringValue)
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76 {
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77 ORTHANC_PLUGINS_THROW_EXCEPTION(OrthancPluginErrorCode_BadFileFormat);
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78 }
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79
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80 return &value;
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81 }
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82
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83
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84 static const Json::Value& GetSequenceContent(const Json::Value& sequence)
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85 {
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86 assert(sequence.type() == Json::objectValue);
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87 assert(sequence.isMember("Type"));
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88 assert(sequence.isMember("Value"));
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89
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90 const Json::Value& value = sequence["Value"];
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91
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92 if (sequence["Type"].asString() != "Sequence" ||
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93 value.type() != Json::arrayValue)
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94 {
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95 ORTHANC_PLUGINS_THROW_EXCEPTION(OrthancPluginErrorCode_BadFileFormat);
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96 }
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97 else
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98 {
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99 return value;
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100 }
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101 }
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102
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103
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104 static bool GetStringInternal(std::string& result,
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105 const Json::Value& tag)
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106 {
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107 assert(tag.type() == Json::objectValue);
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108 assert(tag.isMember("Type"));
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109 assert(tag.isMember("Value"));
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110
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111 const Json::Value& value = tag["Value"];
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112
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113 if (tag["Type"].asString() != "String" ||
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114 value.type() != Json::stringValue)
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115 {
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116 ORTHANC_PLUGINS_THROW_EXCEPTION(OrthancPluginErrorCode_BadFileFormat);
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117 }
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118 else
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119 {
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120 result = value.asString();
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121 return true;
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122 }
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123 }
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124
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125
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126 const Json::Value* FullOrthancDataset::LookupPath(const DicomPath& path) const
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127 {
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128 const Json::Value* content = &root_;
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129
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130 for (unsigned int depth = 0; depth < path.GetPrefixLength(); depth++)
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131 {
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132 const Json::Value* sequence = AccessTag(*content, path.GetPrefixTag(depth));
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133 if (sequence == NULL)
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134 {
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135 return NULL;
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136 }
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137
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138 const Json::Value& nextContent = GetSequenceContent(*sequence);
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139
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140 size_t index = path.GetPrefixIndex(depth);
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141 if (index >= nextContent.size())
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142 {
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143 return NULL;
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144 }
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145 else
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146 {
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147 content = &nextContent[static_cast<Json::Value::ArrayIndex>(index)];
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148 }
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149 }
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150
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151 return AccessTag(*content, path.GetFinalTag());
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152 }
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153
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154
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155 FullOrthancDataset::FullOrthancDataset(IOrthancConnection& orthanc,
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156 const std::string& uri)
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157 {
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158 std::string content;
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159 orthanc.RestApiGet(content, uri);
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160 Parse(content);
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161 }
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162
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163
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164 bool FullOrthancDataset::GetStringValue(std::string& result,
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165 const DicomPath& path) const
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166 {
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167 const Json::Value* value = LookupPath(path);
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168
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169 if (value == NULL)
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170 {
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171 return false;
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172 }
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173 else
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174 {
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175 return GetStringInternal(result, *value);
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176 }
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177 }
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178
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179
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180 bool FullOrthancDataset::GetSequenceSize(size_t& size,
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181 const DicomPath& path) const
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182 {
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183 const Json::Value* sequence = LookupPath(path);
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184
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185 if (sequence == NULL)
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186 {
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187 return false;
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188 }
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189 else
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190 {
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191 size = GetSequenceContent(*sequence).size();
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192 return true;
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193 }
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194 }
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195 }