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HierarchicalMatcher - extracting tags
author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 19 Nov 2015 18:32:00 +0100
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children 23722a191e4e
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1 /**
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2 * Orthanc - A Lightweight, RESTful DICOM Store
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3 * Copyright (C) 2012-2015 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 "../PrecompiledHeadersServer.h"
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34 #include "HierarchicalMatcher.h"
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35
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36 #include "../../Core/OrthancException.h"
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37 #include "../FromDcmtkBridge.h"
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38 #include "../ToDcmtkBridge.h"
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39
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40 #include <dcmtk/dcmdata/dcfilefo.h>
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41
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42 namespace Orthanc
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43 {
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44 HierarchicalMatcher::HierarchicalMatcher(ParsedDicomFile& query,
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45 bool caseSensitivePN)
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46 {
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47 Setup(*query.GetDcmtkObject().getDataset(),
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48 caseSensitivePN,
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49 query.GetEncoding());
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50 }
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51
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52
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53 HierarchicalMatcher::~HierarchicalMatcher()
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54 {
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55 for (Constraints::iterator it = constraints_.begin();
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56 it != constraints_.end(); ++it)
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57 {
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58 if (it->second != NULL)
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59 {
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60 delete it->second;
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61 }
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62 }
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63
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64 for (Sequences::iterator it = sequences_.begin();
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65 it != sequences_.end(); ++it)
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66 {
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67 if (it->second != NULL)
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68 {
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69 delete it->second;
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70 }
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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 void HierarchicalMatcher::Setup(DcmItem& dataset,
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76 bool caseSensitivePN,
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77 Encoding encoding)
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78 {
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79 for (unsigned long i = 0; i < dataset.card(); i++)
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80 {
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81 DcmElement* element = dataset.getElement(i);
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82 if (element == NULL)
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83 {
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84 throw OrthancException(ErrorCode_InternalError);
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85 }
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86
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87 DicomTag tag(FromDcmtkBridge::Convert(element->getTag()));
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88 if (tag == DICOM_TAG_SPECIFIC_CHARACTER_SET)
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89 {
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90 // Ignore this specific tag
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91 continue;
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92 }
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93
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94 ValueRepresentation vr = FromDcmtkBridge::GetValueRepresentation(tag);
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95
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96 if (constraints_.find(tag) != constraints_.end() ||
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97 sequences_.find(tag) != sequences_.end())
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98 {
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99 throw OrthancException(ErrorCode_BadRequest);
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100 }
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101
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102 if (vr == ValueRepresentation_Sequence)
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103 {
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104 DcmSequenceOfItems& sequence = dynamic_cast<DcmSequenceOfItems&>(*element);
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105
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106 if (sequence.card() == 0 ||
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107 (sequence.card() == 1 && sequence.getItem(0)->card() == 0))
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108 {
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109 // Universal matching of a sequence
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110 sequences_[tag] = NULL;
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111 }
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112 else if (sequence.card() == 1)
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113 {
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114 sequences_[tag] = new HierarchicalMatcher(*sequence.getItem(0), caseSensitivePN, encoding);
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115 }
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116 else
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117 {
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118 throw OrthancException(ErrorCode_BadRequest);
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119 }
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120 }
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121 else
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122 {
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123 std::auto_ptr<DicomValue> value(FromDcmtkBridge::ConvertLeafElement
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124 (*element, DicomToJsonFlags_None, encoding));
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125
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126 if (value->IsBinary() ||
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127 value->IsNull())
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128 {
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129 throw OrthancException(ErrorCode_BadRequest);
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130 }
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131 else if (value->GetContent().empty())
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132 {
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133 // This is an universal matcher
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134 constraints_[tag] = NULL;
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135 }
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136 else
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137 {
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138 // DICOM specifies that searches must be case sensitive, except
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139 // for tags with a PN value representation
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140 bool sensitive = true;
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141 if (vr == ValueRepresentation_PatientName)
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142 {
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143 sensitive = caseSensitivePN;
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144 }
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145
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146 constraints_[tag] = IFindConstraint::ParseDicomConstraint(tag, value->GetContent(), sensitive);
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147 }
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148 }
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149 }
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150 }
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151
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152
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153 std::string HierarchicalMatcher::Format(const std::string& prefix) const
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154 {
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155 std::string s;
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156
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157 for (Constraints::const_iterator it = constraints_.begin();
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158 it != constraints_.end(); ++it)
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159 {
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160 s += prefix + it->first.Format() + " ";
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161
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162 if (it->second == NULL)
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163 {
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164 s += "*\n";
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165 }
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166 else
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167 {
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168 s += it->second->Format() + "\n";
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169 }
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170 }
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171
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172 for (Sequences::const_iterator it = sequences_.begin();
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173 it != sequences_.end(); ++it)
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174 {
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175 s += prefix + it->first.Format() + " ";
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176
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177 if (it->second == NULL)
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178 {
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179 s += "*\n";
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180 }
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181 else
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182 {
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183 s += "Sequence:\n" + it->second->Format(prefix + " ");
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184 }
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185 }
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186
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187 return s;
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188 }
1796
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189
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190
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191 bool HierarchicalMatcher::Match(ParsedDicomFile& dicom) const
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192 {
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193 return MatchInternal(*dicom.GetDcmtkObject().getDataset(),
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194 dicom.GetEncoding());
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195 }
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196
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197
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198 bool HierarchicalMatcher::MatchInternal(DcmItem& item,
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199 Encoding encoding) const
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200 {
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201 for (Constraints::const_iterator it = constraints_.begin();
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202 it != constraints_.end(); ++it)
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203 {
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204 if (it->second != NULL)
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205 {
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206 DcmTagKey tag = ToDcmtkBridge::Convert(it->first);
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207
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208 DcmElement* element = NULL;
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209 if (!item.findAndGetElement(tag, element).good() ||
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210 element == NULL)
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211 {
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212 return false;
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213 }
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214
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215 std::auto_ptr<DicomValue> value(FromDcmtkBridge::ConvertLeafElement
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216 (*element, DicomToJsonFlags_None, encoding));
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217
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218 if (value->IsNull() ||
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219 value->IsBinary() ||
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220 !it->second->Match(value->GetContent()))
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221 {
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222 return false;
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223 }
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224 }
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225 }
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diff changeset
226
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diff changeset
227 for (Sequences::const_iterator it = sequences_.begin();
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228 it != sequences_.end(); ++it)
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229 {
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diff changeset
230 if (it->second != NULL)
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diff changeset
231 {
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232 DcmTagKey tag = ToDcmtkBridge::Convert(it->first);
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diff changeset
233
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diff changeset
234 DcmSequenceOfItems* sequence = NULL;
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235 if (!item.findAndGetSequence(tag, sequence).good() ||
5e08a5fe6b27 HierarchicalMatcher - extracting tags
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diff changeset
236 sequence == NULL)
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237 {
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238 return false;
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239 }
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diff changeset
240
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241 bool match = false;
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diff changeset
242
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diff changeset
243 for (unsigned long i = 0; i < sequence->card(); i++)
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244 {
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diff changeset
245 if (it->second->MatchInternal(*sequence->getItem(i), encoding))
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diff changeset
246 {
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247 match = true;
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diff changeset
248 break;
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diff changeset
249 }
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diff changeset
250 }
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diff changeset
251
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diff changeset
252 if (!match)
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diff changeset
253 {
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254 return false;
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diff changeset
255 }
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parents: 1795
diff changeset
256 }
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parents: 1795
diff changeset
257 }
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diff changeset
258
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diff changeset
259 return true;
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diff changeset
260 }
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diff changeset
261
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diff changeset
262
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diff changeset
263 DcmDataset* HierarchicalMatcher::ExtractInternal(DcmItem& item,
5e08a5fe6b27 HierarchicalMatcher - extracting tags
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diff changeset
264 Encoding encoding) const
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diff changeset
265 {
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diff changeset
266 std::auto_ptr<DcmDataset> dataset(new DcmDataset);
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diff changeset
267
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diff changeset
268 for (Constraints::const_iterator it = constraints_.begin();
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parents: 1795
diff changeset
269 it != constraints_.end(); ++it)
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parents: 1795
diff changeset
270 {
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diff changeset
271 DcmTagKey tag = ToDcmtkBridge::Convert(it->first);
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parents: 1795
diff changeset
272
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273 DcmElement* element = NULL;
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diff changeset
274 if (item.findAndGetElement(tag, element).good() &&
5e08a5fe6b27 HierarchicalMatcher - extracting tags
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parents: 1795
diff changeset
275 element != NULL)
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parents: 1795
diff changeset
276 {
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diff changeset
277 std::auto_ptr<DcmElement> cloned(FromDcmtkBridge::CreateElementForTag(it->first));
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diff changeset
278 cloned->copyFrom(*element);
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diff changeset
279 dataset->insert(cloned.release());
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diff changeset
280 }
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parents: 1795
diff changeset
281 }
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parents: 1795
diff changeset
282
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diff changeset
283 for (Sequences::const_iterator it = sequences_.begin();
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diff changeset
284 it != sequences_.end(); ++it)
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parents: 1795
diff changeset
285 {
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diff changeset
286 DcmTagKey tag = ToDcmtkBridge::Convert(it->first);
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parents: 1795
diff changeset
287
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diff changeset
288 DcmSequenceOfItems* sequence = NULL;
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diff changeset
289 if (item.findAndGetSequence(tag, sequence).good() &&
5e08a5fe6b27 HierarchicalMatcher - extracting tags
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parents: 1795
diff changeset
290 sequence != NULL)
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diff changeset
291 {
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diff changeset
292 std::auto_ptr<DcmSequenceOfItems> cloned(new DcmSequenceOfItems(tag));
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293
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294 for (unsigned long i = 0; i < sequence->card(); i++)
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295 {
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296 if (it->second == NULL)
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297 {
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298 cloned->append(new DcmItem(*sequence->getItem(i)));
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299 }
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300 else if (it->second->MatchInternal(*sequence->getItem(i), encoding))
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301 {
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302 cloned->append(it->second->ExtractInternal(*sequence->getItem(i), encoding));
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303 }
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304 }
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305
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306 dataset->insert(cloned.release());
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307 }
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308 }
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309
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310 return dataset.release();
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311 }
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312
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313
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314 ParsedDicomFile* HierarchicalMatcher::Extract(ParsedDicomFile& dicom) const
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315 {
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316 std::auto_ptr<DcmDataset> dataset(ExtractInternal(*dicom.GetDcmtkObject().getDataset(),
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317 dicom.GetEncoding()));
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318
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319 std::auto_ptr<ParsedDicomFile> result(new ParsedDicomFile(*dataset));
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320 result->SetEncoding(Encoding_Utf8);
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321
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322 return result.release();
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323 }
1795
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324 }