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annotate OrthancFramework/Sources/DicomParsing/ParsedDicomCache.cpp @ 5649:4a2bfda999c6

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author Alain Mazy <am@orthanc.team>
date Mon, 03 Jun 2024 14:30:30 +0200
parents 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
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5 * Copyright (C) 2017-2023 Osimis S.A., Belgium
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6 * Copyright (C) 2024-2024 Orthanc Team SRL, Belgium
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7 * Copyright (C) 2021-2024 Sebastien Jodogne, ICTEAM UCLouvain, Belgium
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8 *
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9 * This program is free software: you can redistribute it and/or
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10 * modify it under the terms of the GNU Lesser General Public License
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11 * as published by the Free Software Foundation, either version 3 of
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12 * the License, or (at your option) any later version.
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13 *
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14 * This program is distributed in the hope that it will be useful, but
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15 * WITHOUT ANY WARRANTY; without even the implied warranty of
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16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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17 * Lesser General Public License for more details.
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18 *
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19 * You should have received a copy of the GNU Lesser General Public
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20 * License along with this program. If not, see
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21 * <http://www.gnu.org/licenses/>.
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22 **/
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23
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24
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25 #include "../PrecompiledHeaders.h"
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26 #include "ParsedDicomCache.h"
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27
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28 #include "../OrthancException.h"
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29
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30 namespace Orthanc
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31 {
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32 class ParsedDicomCache::Item : public ICacheable
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33 {
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34 private:
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35 std::unique_ptr<ParsedDicomFile> dicom_;
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36 size_t fileSize_;
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37
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38 public:
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39 Item(ParsedDicomFile* dicom,
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40 size_t fileSize) :
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41 dicom_(dicom),
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42 fileSize_(fileSize)
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43 {
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44 if (dicom == NULL)
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45 {
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46 throw OrthancException(ErrorCode_NullPointer);
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47 }
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48 }
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49
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50 virtual size_t GetMemoryUsage() const ORTHANC_OVERRIDE
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51 {
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52 return fileSize_;
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53 }
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54
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55 ParsedDicomFile& GetDicom() const
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56 {
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57 assert(dicom_.get() != NULL);
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58 return *dicom_;
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59 }
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60 };
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61
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62
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63 ParsedDicomCache::ParsedDicomCache(size_t size) :
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64 cacheSize_(size),
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65 largeSize_(0)
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66 {
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67 if (size == 0)
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68 {
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69 throw OrthancException(ErrorCode_ParameterOutOfRange);
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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 size_t ParsedDicomCache::GetNumberOfItems()
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75 {
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76 #if !defined(__EMSCRIPTEN__)
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77 boost::mutex::scoped_lock lock(mutex_);
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78 #endif
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79
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80 if (cache_.get() == NULL)
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81 {
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82 return (largeDicom_.get() == NULL ? 0 : 1);
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83 }
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84 else
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85 {
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86 assert(largeDicom_.get() == NULL);
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87 assert(largeSize_ == 0);
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88 return cache_->GetNumberOfItems();
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89 }
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90 }
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91
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92
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93 size_t ParsedDicomCache::GetCurrentSize()
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94 {
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95 #if !defined(__EMSCRIPTEN__)
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96 boost::mutex::scoped_lock lock(mutex_);
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97 #endif
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98
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99 if (cache_.get() == NULL)
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100 {
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101 return largeSize_;
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102 }
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103 else
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104 {
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105 assert(largeDicom_.get() == NULL);
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106 assert(largeSize_ == 0);
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107 return cache_->GetCurrentSize();
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108 }
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109 }
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110
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111
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112 void ParsedDicomCache::Invalidate(const std::string& id)
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113 {
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114 #if !defined(__EMSCRIPTEN__)
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115 boost::mutex::scoped_lock lock(mutex_);
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116 #endif
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117
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118 if (cache_.get() != NULL)
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119 {
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120 cache_->Invalidate(id);
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121 }
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122
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123 if (largeId_ == id)
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124 {
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125 largeDicom_.reset(NULL);
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126 largeSize_ = 0;
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127 }
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128 }
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129
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130
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131 void ParsedDicomCache::Acquire(const std::string& id,
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132 ParsedDicomFile* dicom, // Takes ownership
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133 size_t fileSize)
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134 {
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135 #if !defined(__EMSCRIPTEN__)
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136 boost::mutex::scoped_lock lock(mutex_);
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137 #endif
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138
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139 if (fileSize >= cacheSize_)
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140 {
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141 cache_.reset(NULL);
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142 largeDicom_.reset(dicom);
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143 largeId_ = id;
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144 largeSize_ = fileSize;
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145 }
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146 else
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147 {
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148 largeDicom_.reset(NULL);
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149 largeSize_ = 0;
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150
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151 if (cache_.get() == NULL)
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152 {
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153 cache_.reset(new MemoryObjectCache);
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154 cache_->SetMaximumSize(cacheSize_);
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155 }
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156
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157 cache_->Acquire(id, new Item(dicom, fileSize));
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158 }
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159 }
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160
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161
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162 ParsedDicomCache::Accessor::Accessor(ParsedDicomCache& that,
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163 const std::string& id) :
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164 #if !defined(__EMSCRIPTEN__)
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165 lock_(that.mutex_),
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166 #endif
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167 id_(id),
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168 file_(NULL),
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169 fileSize_(0)
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170 {
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171 if (that.largeDicom_.get() != NULL &&
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172 that.largeId_ == id)
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173 {
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174 file_ = that.largeDicom_.get();
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175 fileSize_ = that.largeSize_;
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176 }
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177 else if (that.cache_.get() != NULL)
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178 {
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179 accessor_.reset(new MemoryObjectCache::Accessor(
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180 *that.cache_, id, true /* unique */));
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181 if (accessor_->IsValid())
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182 {
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183 const Item& item = dynamic_cast<const Item&>(accessor_->GetValue());
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184 file_ = &item.GetDicom();
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185 fileSize_ = item.GetMemoryUsage();
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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
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191 bool ParsedDicomCache::Accessor::IsValid() const
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192 {
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193 return file_ != NULL;
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194 }
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195
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196
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197 ParsedDicomFile& ParsedDicomCache::Accessor::GetDicom() const
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198 {
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199 if (IsValid())
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200 {
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201 assert(file_ != NULL);
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202 return *file_;
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203 }
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204 else
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205 {
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206 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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207 }
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208 }
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209
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210
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211 size_t ParsedDicomCache::Accessor::GetFileSize() const
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212 {
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213 if (IsValid())
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214 {
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215 return fileSize_;
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216 }
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217 else
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218 {
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219 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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220 }
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221 }
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222 }