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annotate OrthancStone/Sources/Toolbox/OrthancDatasets/DicomWebDataset.cpp @ 2174:2410a171ebfb

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refactoring using DicomWebDataset and OrthancNativeDataset
author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 22 Oct 2024 21:52:34 +0200
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2174
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1 /**
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2 * Stone of Orthanc
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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 * Copyright (C) 2017-2023 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2024 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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7 *
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8 * This program is free software: you can redistribute it and/or
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9 * modify it under the terms of the GNU Lesser General Public License
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10 * as published by the Free Software Foundation, either version 3 of
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11 * the License, or (at your option) any later version.
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12 *
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13 * This program is distributed in the hope that it will be useful, but
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14 * WITHOUT ANY WARRANTY; without even the implied warranty of
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15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 * Lesser General Public License for more details.
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17 *
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18 * You should have received a copy of the GNU Lesser General Public
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19 * License along with this program. If not, see
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20 * <http://www.gnu.org/licenses/>.
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21 **/
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22
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23
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24 #include "DicomWebDataset.h"
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25
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26 #include <OrthancException.h>
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27
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28 #include <boost/lexical_cast.hpp>
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29
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30
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31 static const char* const VALUE = "Value";
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32 static const char* const VR = "vr";
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33 static const char* const SQ = "SQ";
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34 static const char* const ALPHABETIC = "Alphabetic";
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35
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36
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37 namespace OrthancStone
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38 {
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39 static const Json::Value* GetValue(std::string& vr,
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40 const Json::Value& node,
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41 const Orthanc::DicomTag& tag)
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42 {
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43 char id[16];
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44 sprintf(id, "%04X%04X", tag.GetGroup(), tag.GetElement());
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45
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46 if (node.type() != Json::objectValue)
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47 {
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48 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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49 }
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50
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51 if (!node.isMember(id))
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52 {
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53 return NULL;
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54 }
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55
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56 if (node[id].type() == Json::objectValue &&
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57 node[id].isMember(VALUE) &&
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58 node[id].isMember(VR) &&
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59 node[id][VR].type() == Json::stringValue)
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60 {
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61 vr = node[id][VR].asString();
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62 return &node[id][VALUE];
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63 }
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64 else
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65 {
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66 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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67 }
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68 }
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69
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70
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71 static const Json::Value* GetSequenceArray(const Json::Value& node,
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72 const Orthanc::DicomTag& tag)
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73 {
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74 std::string vr;
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75 const Json::Value* value = GetValue(vr, node, tag);
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76
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77 if (value != NULL &&
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78 vr == SQ &&
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79 value->type() == Json::arrayValue)
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80 {
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81 return value;
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82 }
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83 else
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84 {
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85 return NULL;
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86 }
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87 }
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88
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89
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90 const Json::Value* DicomWebDataset::LookupValue(std::string& vr,
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91 const Orthanc::DicomPath& path) const
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92 {
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93 const Json::Value* current = &dicomweb_;
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94
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95 for (size_t i = 0; i < path.GetPrefixLength(); i++)
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96 {
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97 if (path.IsPrefixUniversal(i))
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98 {
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99 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented);
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100 }
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101
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102 Json::ArrayIndex index = path.GetPrefixIndex(i);
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103
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104 const Json::Value* next = GetSequenceArray(*current, path.GetPrefixTag(i));
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105 if (next != NULL &&
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106 index < next->size())
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107 {
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108 current = &((*next) [index]);
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109 }
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110 else
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111 {
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112 return NULL;
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113 }
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114 }
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115
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116 return GetValue(vr, *current, path.GetFinalTag());
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117 }
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118
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119
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120 DicomWebDataset::DicomWebDataset(const Json::Value& dicomweb) :
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121 dicomweb_(dicomweb)
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122 {
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123 if (dicomweb.type() != Json::objectValue)
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124 {
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125 throw Orthanc::OrthancException(Orthanc::ErrorCode_BadFileFormat);
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126 }
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127 }
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128
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129
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130 bool DicomWebDataset::GetStringValue(std::string& result,
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131 const Orthanc::DicomPath& path) const
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132 {
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133 std::string vr;
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134 const Json::Value* value = LookupValue(vr, path);
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135
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136 if (value == NULL)
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137 {
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138 return false;
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139 }
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140 else if (value->type() == Json::arrayValue &&
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141 value->size() == 1u &&
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142 (*value) [0].type() == Json::stringValue && (
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143 // This is the list of all the string value representations:
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144 // https://dicom.nema.org/medical/dicom/current/output/chtml/part05/sect_6.2.html
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145 vr == "AE" ||
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146 vr == "AS" ||
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147 vr == "CS" ||
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148 vr == "DA" ||
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149 vr == "DS" ||
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150 vr == "DT" ||
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151 vr == "IS" ||
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152 vr == "LO" ||
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153 vr == "LT" ||
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154 vr == "SH" ||
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155 vr == "ST" ||
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156 vr == "TM" ||
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157 vr == "UC" ||
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158 vr == "UI" ||
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159 vr == "UR" ||
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160 vr == "UT"))
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161 {
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162 result = (*value) [0].asString();
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163 return true;
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164 }
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165 else if (value->type() == Json::arrayValue &&
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166 value->size() == 1u &&
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167 vr == "PN" &&
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168 (*value) [0].type() == Json::objectValue &&
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169 (*value) [0].isMember(ALPHABETIC) &&
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170 (*value) [0][ALPHABETIC].type() == Json::stringValue)
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171 {
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172 result = (*value) [0][ALPHABETIC].asString();
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173 return true;
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174 }
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175 else if (value->type() == Json::arrayValue &&
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176 value->size() == 1u &&
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177 (vr == "FD" || vr == "FL") &&
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178 (*value) [0].isDouble())
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179 {
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180 result = boost::lexical_cast<std::string>((*value) [0].asDouble());
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181 return true;
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182 }
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183 else if (value->type() == Json::arrayValue &&
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184 value->size() == 1u &&
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185 (vr == "UL" ||
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186 vr == "US") &&
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187 (*value) [0].isUInt64())
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188 {
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189 result = boost::lexical_cast<std::string>((*value) [0].asUInt64());
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190 return true;
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191 }
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192 else if (value->type() == Json::arrayValue &&
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193 value->size() == 1u &&
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194 (vr == "SL" ||
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195 vr == "SS") &&
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196 (*value) [0].isInt64())
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197 {
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198 result = boost::lexical_cast<std::string>((*value) [0].asInt64());
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199 return true;
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200 }
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201 else if (value->type() == Json::arrayValue &&
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202 vr == "SQ")
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203 {
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204 return false;
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205 }
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206 else
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207 {
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208 throw Orthanc::OrthancException(Orthanc::ErrorCode_NotImplemented);
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209 }
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210 }
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211
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212
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213 bool DicomWebDataset::GetSequenceSize(size_t& size,
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214 const Orthanc::DicomPath& path) const
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215 {
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216 std::string vr;
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217 const Json::Value* value = LookupValue(vr, path);
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218
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219 if (value != NULL &&
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220 vr == SQ &&
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221 value->type() == Json::arrayValue)
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222 {
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223 size = value->size();
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224 return true;
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225 }
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226 else
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227 {
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228 return false;
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229 }
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230 }
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231 }