Mercurial > hg > orthanc

annotate OrthancFramework/Sources/DicomParsing/ParsedDicomCache.cpp @ 5485:48b8dae6dc77

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Thu, 04 Jan 2024 15:10:42 +0100
parents 0ea402b4d901
children f7adfb22e20e
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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
5485
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5 * Copyright (C) 2017-2024 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 "../PrecompiledHeaders.h"
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25 #include "ParsedDicomCache.h"
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26
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27 #include "../OrthancException.h"
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28
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29 namespace Orthanc
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30 {
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31 class ParsedDicomCache::Item : public ICacheable
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32 {
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33 private:
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34 std::unique_ptr<ParsedDicomFile> dicom_;
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35 size_t fileSize_;
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36
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37 public:
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38 Item(ParsedDicomFile* dicom,
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39 size_t fileSize) :
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40 dicom_(dicom),
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41 fileSize_(fileSize)
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42 {
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43 if (dicom == NULL)
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44 {
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45 throw OrthancException(ErrorCode_NullPointer);
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46 }
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47 }
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48
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49 virtual size_t GetMemoryUsage() const ORTHANC_OVERRIDE
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50 {
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51 return fileSize_;
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52 }
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53
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54 ParsedDicomFile& GetDicom() const
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55 {
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56 assert(dicom_.get() != NULL);
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57 return *dicom_;
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58 }
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59 };
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60
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61
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62 ParsedDicomCache::ParsedDicomCache(size_t size) :
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63 cacheSize_(size),
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64 largeSize_(0)
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65 {
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66 if (size == 0)
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67 {
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68 throw OrthancException(ErrorCode_ParameterOutOfRange);
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69 }
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70 }
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71
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72
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73 size_t ParsedDicomCache::GetNumberOfItems()
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74 {
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75 #if !defined(__EMSCRIPTEN__)
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76 boost::mutex::scoped_lock lock(mutex_);
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77 #endif
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78
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79 if (cache_.get() == NULL)
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80 {
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81 return (largeDicom_.get() == NULL ? 0 : 1);
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82 }
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83 else
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84 {
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85 assert(largeDicom_.get() == NULL);
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86 assert(largeSize_ == 0);
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87 return cache_->GetNumberOfItems();
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88 }
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89 }
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90
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91
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92 size_t ParsedDicomCache::GetCurrentSize()
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93 {
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94 #if !defined(__EMSCRIPTEN__)
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95 boost::mutex::scoped_lock lock(mutex_);
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96 #endif
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97
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98 if (cache_.get() == NULL)
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99 {
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100 return largeSize_;
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101 }
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102 else
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103 {
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104 assert(largeDicom_.get() == NULL);
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105 assert(largeSize_ == 0);
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106 return cache_->GetCurrentSize();
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107 }
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108 }
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109
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110
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111 void ParsedDicomCache::Invalidate(const std::string& id)
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112 {
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113 #if !defined(__EMSCRIPTEN__)
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114 boost::mutex::scoped_lock lock(mutex_);
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115 #endif
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116
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117 if (cache_.get() != NULL)
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118 {
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119 cache_->Invalidate(id);
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120 }
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121
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122 if (largeId_ == id)
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123 {
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124 largeDicom_.reset(NULL);
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125 largeSize_ = 0;
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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 void ParsedDicomCache::Acquire(const std::string& id,
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131 ParsedDicomFile* dicom, // Takes ownership
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132 size_t fileSize)
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133 {
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134 #if !defined(__EMSCRIPTEN__)
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135 boost::mutex::scoped_lock lock(mutex_);
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136 #endif
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137
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138 if (fileSize >= cacheSize_)
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139 {
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140 cache_.reset(NULL);
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141 largeDicom_.reset(dicom);
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142 largeId_ = id;
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143 largeSize_ = fileSize;
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144 }
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145 else
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146 {
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147 largeDicom_.reset(NULL);
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148 largeSize_ = 0;
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149
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150 if (cache_.get() == NULL)
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151 {
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152 cache_.reset(new MemoryObjectCache);
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153 cache_->SetMaximumSize(cacheSize_);
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154 }
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155
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156 cache_->Acquire(id, new Item(dicom, fileSize));
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157 }
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158 }
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159
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160
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161 ParsedDicomCache::Accessor::Accessor(ParsedDicomCache& that,
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162 const std::string& id) :
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163 #if !defined(__EMSCRIPTEN__)
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164 lock_(that.mutex_),
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165 #endif
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166 id_(id),
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167 file_(NULL),
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168 fileSize_(0)
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169 {
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170 if (that.largeDicom_.get() != NULL &&
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171 that.largeId_ == id)
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172 {
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173 file_ = that.largeDicom_.get();
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174 fileSize_ = that.largeSize_;
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175 }
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176 else if (that.cache_.get() != NULL)
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177 {
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178 accessor_.reset(new MemoryObjectCache::Accessor(
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179 *that.cache_, id, true /* unique */));
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180 if (accessor_->IsValid())
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181 {
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182 const Item& item = dynamic_cast<const Item&>(accessor_->GetValue());
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183 file_ = &item.GetDicom();
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184 fileSize_ = item.GetMemoryUsage();
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185 }
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186 }
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187 }
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188
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189
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190 bool ParsedDicomCache::Accessor::IsValid() const
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191 {
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192 return file_ != NULL;
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193 }
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194
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195
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196 ParsedDicomFile& ParsedDicomCache::Accessor::GetDicom() const
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197 {
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198 if (IsValid())
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199 {
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200 assert(file_ != NULL);
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201 return *file_;
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202 }
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203 else
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204 {
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205 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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206 }
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207 }
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208
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209
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210 size_t ParsedDicomCache::Accessor::GetFileSize() const
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211 {
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212 if (IsValid())
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213 {
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214 return fileSize_;
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215 }
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216 else
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217 {
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218 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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219 }
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220 }
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221 }