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annotate Plugins/Samples/Common/SimplifiedOrthancDataset.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
parents
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 "SimplifiedOrthancDataset.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 SimplifiedOrthancDataset::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 const Json::Value* SimplifiedOrthancDataset::LookupPath(const DicomPath& path) const
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54 {
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55 const Json::Value* content = &root_;
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56
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57 for (unsigned int depth = 0; depth < path.GetPrefixLength(); depth++)
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58 {
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59 const char* name = path.GetPrefixTag(depth).GetName();
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60 if (content->type() != Json::objectValue)
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61 {
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62 ORTHANC_PLUGINS_THROW_EXCEPTION(OrthancPluginErrorCode_BadFileFormat);
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63 }
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64
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65 if (!content->isMember(name))
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66 {
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67 return NULL;
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68 }
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69
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70 const Json::Value& sequence = (*content) [name];
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71 if (sequence.type() != Json::arrayValue)
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72 {
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73 ORTHANC_PLUGINS_THROW_EXCEPTION(OrthancPluginErrorCode_BadFileFormat);
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74 }
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75
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76 size_t index = path.GetPrefixIndex(depth);
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77 if (index >= sequence.size())
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78 {
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79 return NULL;
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80 }
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81 else
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82 {
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83 content = &sequence[static_cast<Json::Value::ArrayIndex>(index)];
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84 }
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85 }
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86
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87 const char* name = path.GetFinalTag().GetName();
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88
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89 if (content->type() != Json::objectValue)
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90 {
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91 ORTHANC_PLUGINS_THROW_EXCEPTION(OrthancPluginErrorCode_BadFileFormat);
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92 }
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93 if (!content->isMember(name))
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94 {
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95 return NULL;
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96 }
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97 else
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98 {
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99 return &((*content) [name]);
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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 SimplifiedOrthancDataset::SimplifiedOrthancDataset(IOrthancConnection& orthanc,
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105 const std::string& uri)
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106 {
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107 std::string content;
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108 orthanc.RestApiGet(content, uri);
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109 Parse(content);
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110 }
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111
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112
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113 bool SimplifiedOrthancDataset::GetStringValue(std::string& result,
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114 const DicomPath& path) const
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115 {
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116 const Json::Value* value = LookupPath(path);
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117
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118 if (value == NULL)
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119 {
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120 return false;
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121 }
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122 else if (value->type() != Json::stringValue)
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123 {
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124 ORTHANC_PLUGINS_THROW_EXCEPTION(OrthancPluginErrorCode_BadFileFormat);
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125 }
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126 else
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127 {
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128 result = value->asString();
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129 return true;
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130 }
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131 }
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132
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133
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134 bool SimplifiedOrthancDataset::GetSequenceSize(size_t& size,
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135 const DicomPath& path) const
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136 {
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137 const Json::Value* sequence = LookupPath(path);
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138
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139 if (sequence == NULL)
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140 {
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141 // Inexistent path
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142 return false;
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143 }
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144 else if (sequence->type() != Json::arrayValue)
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145 {
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146 // Not a sequence
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147 ORTHANC_PLUGINS_THROW_EXCEPTION(OrthancPluginErrorCode_BadFileFormat);
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148 }
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149 else
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150 {
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151 size = sequence->size();
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152 return true;
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153 }
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154 }
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155 }