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annotate OrthancServer/Sources/Search/HierarchicalMatcher.cpp @ 4870:43e613a7756b

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 11 Jan 2022 11:15:42 +0100
parents 7053502fbf97
children 6eff25f70121
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
1900
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
4870
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5 * Copyright (C) 2017-2022 Osimis S.A., Belgium
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6 * Copyright (C) 2021-2022 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 General Public License as
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10 * published by the Free Software Foundation, either version 3 of the
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11 * License, or (at your option) any later version.
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12 *
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13 * In addition, as a special exception, the copyright holders of this
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14 * program give permission to link the code of its release with the
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15 * OpenSSL project's "OpenSSL" library (or with modified versions of it
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16 * that use the same license as the "OpenSSL" library), and distribute
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17 * the linked executables. You must obey the GNU General Public License
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18 * in all respects for all of the code used other than "OpenSSL". If you
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19 * modify file(s) with this exception, you may extend this exception to
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20 * your version of the file(s), but you are not obligated to do so. If
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21 * you do not wish to do so, delete this exception statement from your
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22 * version. If you delete this exception statement from all source files
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23 * in the program, then also delete it here.
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24 *
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25 * This program is distributed in the hope that it will be useful, but
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26 * WITHOUT ANY WARRANTY; without even the implied warranty of
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27 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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28 * General Public License for more details.
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29 *
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30 * You should have received a copy of the GNU General Public License
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31 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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32 **/
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33
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34
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35 #include "../PrecompiledHeadersServer.h"
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36 #include "HierarchicalMatcher.h"
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37
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38 #include "../../../OrthancFramework/Sources/Logging.h"
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39 #include "../../../OrthancFramework/Sources/OrthancException.h"
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40 #include "../../../OrthancFramework/Sources/DicomParsing/FromDcmtkBridge.h"
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41 #include "../../../OrthancFramework/Sources/DicomParsing/ToDcmtkBridge.h"
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42 #include "../OrthancConfiguration.h"
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43
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44 #include <dcmtk/dcmdata/dcfilefo.h>
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45
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46 namespace Orthanc
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47 {
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48 HierarchicalMatcher::HierarchicalMatcher(ParsedDicomFile& query)
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49 {
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50 bool caseSensitivePN;
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51
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52 {
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53 OrthancConfiguration::ReaderLock lock;
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54 caseSensitivePN = lock.GetConfiguration().GetBooleanParameter("CaseSensitivePN", false);
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55 }
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56
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57 bool hasCodeExtensions;
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58 Encoding encoding = query.DetectEncoding(hasCodeExtensions);
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59 Setup(*query.GetDcmtkObject().getDataset(), caseSensitivePN, encoding, hasCodeExtensions);
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60 }
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61
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62
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63 HierarchicalMatcher::~HierarchicalMatcher()
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64 {
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65 for (Sequences::iterator it = sequences_.begin();
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66 it != sequences_.end(); ++it)
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67 {
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68 if (it->second != NULL)
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69 {
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70 delete it->second;
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71 }
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72 }
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73 }
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74
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75
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76 void HierarchicalMatcher::Setup(DcmItem& dataset,
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77 bool caseSensitivePN,
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78 Encoding encoding,
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79 bool hasCodeExtensions)
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80 {
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81 for (unsigned long i = 0; i < dataset.card(); i++)
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82 {
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83 DcmElement* element = dataset.getElement(i);
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84 if (element == NULL)
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85 {
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86 throw OrthancException(ErrorCode_InternalError);
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87 }
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88
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89 DicomTag tag(FromDcmtkBridge::Convert(element->getTag()));
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90 if (tag == DICOM_TAG_SPECIFIC_CHARACTER_SET || // Ignore encoding
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91 tag.GetElement() == 0x0000) // Ignore all "Group Length" tags
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92 {
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93 continue;
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94 }
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95
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96 if (flatTags_.find(tag) != flatTags_.end() ||
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97 sequences_.find(tag) != sequences_.end())
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98 {
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99 // A constraint already exists on this tag
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100 throw OrthancException(ErrorCode_BadRequest);
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101 }
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102
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103 if (FromDcmtkBridge::LookupValueRepresentation(tag) == ValueRepresentation_Sequence)
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104 {
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105 DcmSequenceOfItems& sequence = dynamic_cast<DcmSequenceOfItems&>(*element);
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106
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107 if (sequence.card() == 0 ||
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108 (sequence.card() == 1 && sequence.getItem(0)->card() == 0))
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109 {
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110 // Universal matching of a sequence
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111 sequences_[tag] = NULL;
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112 }
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113 else if (sequence.card() == 1)
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114 {
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115 sequences_[tag] = new HierarchicalMatcher(*sequence.getItem(0), caseSensitivePN, encoding, hasCodeExtensions);
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116 }
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117 else
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118 {
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119 throw OrthancException(ErrorCode_BadRequest);
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120 }
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121 }
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122 else
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123 {
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124 flatTags_.insert(tag);
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125
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126 std::set<DicomTag> ignoreTagLength;
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127 std::unique_ptr<DicomValue> value(FromDcmtkBridge::ConvertLeafElement
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128 (*element, DicomToJsonFlags_None,
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129 0, encoding, hasCodeExtensions, ignoreTagLength));
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130
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131 // WARNING: Also modify "DatabaseLookup::IsMatch()" if modifying this code
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132 if (value.get() == NULL ||
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133 value->IsNull())
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134 {
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135 // This is an universal constraint
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136 }
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137 else if (value->IsBinary())
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138 {
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139 if (!value->GetContent().empty())
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140 {
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141 LOG(WARNING) << "This C-Find modality worklist query contains a non-empty tag ("
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142 << tag.Format() << ") with UN (unknown) value representation. "
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143 << "It will be ignored.";
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144 }
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145 }
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146 else if (value->GetContent().empty())
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147 {
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148 // This is an universal matcher
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149 }
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150 else
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151 {
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152 flatConstraints_.AddDicomConstraint
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153 (tag, value->GetContent(), caseSensitivePN, true /* mandatory */);
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154 }
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155 }
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156 }
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157 }
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158
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159
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160 std::string HierarchicalMatcher::Format(const std::string& prefix) const
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161 {
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162 std::string s;
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163
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164 std::set<DicomTag> tags;
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165 for (size_t i = 0; i < flatConstraints_.GetConstraintsCount(); i++)
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166 {
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167 const DicomTagConstraint& c = flatConstraints_.GetConstraint(i);
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168
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169 s += c.Format() + "\n";
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170 tags.insert(c.GetTag());
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171 }
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172
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173 // Loop over the universal constraints
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174 for (std::set<DicomTag>::const_iterator it = flatTags_.begin();
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175 it != flatTags_.end(); ++it)
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176 {
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177 if (tags.find(*it) == tags.end())
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178 {
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179 s += prefix + it->Format() + " == *\n";
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180 }
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181 }
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182
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183 for (Sequences::const_iterator it = sequences_.begin();
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184 it != sequences_.end(); ++it)
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185 {
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186 s += prefix + it->first.Format() + " ";
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187
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188 if (it->second == NULL)
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189 {
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190 s += "*\n";
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191 }
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192 else
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193 {
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194 s += "Sequence:\n" + it->second->Format(prefix + " ");
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195 }
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196 }
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197
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198 return s;
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199 }
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200
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201
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202 bool HierarchicalMatcher::Match(ParsedDicomFile& dicom) const
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203 {
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204 bool hasCodeExtensions;
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205 Encoding encoding = dicom.DetectEncoding(hasCodeExtensions);
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206
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207 return MatchInternal(*dicom.GetDcmtkObject().getDataset(),
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208 encoding, hasCodeExtensions);
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209 }
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210
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211
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212 bool HierarchicalMatcher::MatchInternal(DcmItem& item,
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213 Encoding encoding,
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214 bool hasCodeExtensions) const
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215 {
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216 if (!flatConstraints_.IsMatch(item, encoding, hasCodeExtensions))
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217 {
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218 return false;
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219 }
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220
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221 for (Sequences::const_iterator it = sequences_.begin();
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222 it != sequences_.end(); ++it)
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223 {
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224 if (it->second != NULL)
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225 {
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226 DcmTagKey tag = ToDcmtkBridge::Convert(it->first);
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227
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228 DcmSequenceOfItems* sequence = NULL;
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229 if (!item.findAndGetSequence(tag, sequence).good() ||
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230 sequence == NULL)
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231 {
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232 continue;
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233 }
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234
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235 bool match = false;
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236
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237 for (unsigned long i = 0; i < sequence->card(); i++)
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238 {
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239 if (it->second->MatchInternal(*sequence->getItem(i), encoding, hasCodeExtensions))
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240 {
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241 match = true;
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242 break;
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243 }
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244 }
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245
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246 if (!match)
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247 {
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248 return false;
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249 }
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250 }
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251 }
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252
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253 return true;
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254 }
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255
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256
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257 DcmDataset* HierarchicalMatcher::ExtractInternal(DcmItem& source,
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258 Encoding encoding,
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259 bool hasCodeExtensions) const
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260 {
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261 std::unique_ptr<DcmDataset> target(new DcmDataset);
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262
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263 for (std::set<DicomTag>::const_iterator it = flatTags_.begin();
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264 it != flatTags_.end(); ++it)
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265 {
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266 DcmTagKey tag = ToDcmtkBridge::Convert(*it);
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267
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268 DcmElement* element = NULL;
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269 if (source.findAndGetElement(tag, element).good() &&
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270 element != NULL)
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271 {
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272 if (it->IsPrivate())
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273 {
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274 throw OrthancException(ErrorCode_NotImplemented,
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275 "Not applicable to private tags: " + it->Format());
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276 }
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277
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278 std::unique_ptr<DcmElement> cloned(FromDcmtkBridge::CreateElementForTag(*it, "" /* no private creator */));
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279 cloned->copyFrom(*element);
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280 target->insert(cloned.release());
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281 }
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282 }
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283
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284 for (Sequences::const_iterator it = sequences_.begin();
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285 it != sequences_.end(); ++it)
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286 {
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287 DcmTagKey tag = ToDcmtkBridge::Convert(it->first);
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288
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289 DcmSequenceOfItems* sequence = NULL;
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290 if (source.findAndGetSequence(tag, sequence).good() &&
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291 sequence != NULL)
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292 {
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293 std::unique_ptr<DcmSequenceOfItems> cloned(new DcmSequenceOfItems(tag));
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294
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295 for (unsigned long i = 0; i < sequence->card(); i++)
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296 {
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297 if (it->second == NULL)
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298 {
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299 cloned->append(new DcmItem(*sequence->getItem(i)));
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300 }
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301 else if (it->second->MatchInternal(*sequence->getItem(i), encoding, hasCodeExtensions)) // TODO Might be optimized
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302 {
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303 // It is necessary to encapsulate the child dataset into a
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304 // "DcmItem" object before it can be included in a
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305 // sequence. Otherwise, "dciodvfy" reports an error "Bad
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306 // tag in sequence - Expecting Item or Sequence Delimiter."
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307 std::unique_ptr<DcmDataset> child(it->second->ExtractInternal(*sequence->getItem(i), encoding, hasCodeExtensions));
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308 cloned->append(new DcmItem(*child));
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309 }
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310 }
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311
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312 target->insert(cloned.release());
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313 }
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314 }
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315
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316 return target.release();
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317 }
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318
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319
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320 ParsedDicomFile* HierarchicalMatcher::Extract(ParsedDicomFile& dicom) const
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321 {
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322 bool hasCodeExtensions;
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323 Encoding encoding = dicom.DetectEncoding(hasCodeExtensions);
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324
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325 std::unique_ptr<DcmDataset> dataset(ExtractInternal(*dicom.GetDcmtkObject().getDataset(),
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326 encoding, hasCodeExtensions));
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327
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328 std::unique_ptr<ParsedDicomFile> result(new ParsedDicomFile(*dataset));
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329 result->SetEncoding(encoding);
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330
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331 return result.release();
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332 }
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333 }