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annotate OrthancFramework/Sources/DicomParsing/ParsedDicomCache.cpp @ 4706:dbee8bd8ee1f

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author Sebastien Jodogne <s.jodogne@gmail.com>
date Tue, 22 Jun 2021 09:13:03 +0200
parents fa2311f94d9f
children 7053502fbf97
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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) 2017-2021 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Lesser General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Lesser General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Lesser General Public
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18 * License along with this program. If not, see
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19 * <http://www.gnu.org/licenses/>.
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20 **/
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21
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22
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23 #include "../PrecompiledHeaders.h"
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24 #include "ParsedDicomCache.h"
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25
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26 #include "../OrthancException.h"
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27
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28 namespace Orthanc
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29 {
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30 class ParsedDicomCache::Item : public ICacheable
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31 {
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32 private:
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33 std::unique_ptr<ParsedDicomFile> dicom_;
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34 size_t fileSize_;
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35
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36 public:
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37 Item(ParsedDicomFile* dicom,
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38 size_t fileSize) :
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39 dicom_(dicom),
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40 fileSize_(fileSize)
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41 {
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42 if (dicom == NULL)
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43 {
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44 throw OrthancException(ErrorCode_NullPointer);
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45 }
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46 }
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47
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48 virtual size_t GetMemoryUsage() const ORTHANC_OVERRIDE
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49 {
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50 return fileSize_;
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51 }
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52
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53 ParsedDicomFile& GetDicom() const
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54 {
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55 assert(dicom_.get() != NULL);
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56 return *dicom_;
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57 }
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58 };
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59
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60
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61 ParsedDicomCache::ParsedDicomCache(size_t size) :
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62 cacheSize_(size),
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63 largeSize_(0)
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64 {
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65 if (size == 0)
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66 {
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67 throw OrthancException(ErrorCode_ParameterOutOfRange);
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68 }
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69 }
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70
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71
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72 size_t ParsedDicomCache::GetNumberOfItems()
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73 {
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74 #if !defined(__EMSCRIPTEN__)
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75 boost::mutex::scoped_lock lock(mutex_);
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76 #endif
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77
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78 if (cache_.get() == NULL)
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79 {
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80 return (largeDicom_.get() == NULL ? 0 : 1);
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81 }
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82 else
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83 {
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84 assert(largeDicom_.get() == NULL);
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85 assert(largeSize_ == 0);
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86 return cache_->GetNumberOfItems();
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87 }
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88 }
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89
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90
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91 size_t ParsedDicomCache::GetCurrentSize()
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92 {
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93 #if !defined(__EMSCRIPTEN__)
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94 boost::mutex::scoped_lock lock(mutex_);
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95 #endif
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96
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97 if (cache_.get() == NULL)
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98 {
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99 return largeSize_;
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100 }
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101 else
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102 {
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103 assert(largeDicom_.get() == NULL);
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104 assert(largeSize_ == 0);
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105 return cache_->GetCurrentSize();
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106 }
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107 }
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108
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109
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110 void ParsedDicomCache::Invalidate(const std::string& id)
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111 {
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112 #if !defined(__EMSCRIPTEN__)
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113 boost::mutex::scoped_lock lock(mutex_);
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114 #endif
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115
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116 if (cache_.get() != NULL)
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117 {
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118 cache_->Invalidate(id);
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119 }
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120
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121 if (largeId_ == id)
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122 {
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123 largeDicom_.reset(NULL);
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124 largeSize_ = 0;
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125 }
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126 }
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127
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128
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129 void ParsedDicomCache::Acquire(const std::string& id,
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130 ParsedDicomFile* dicom, // Takes ownership
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131 size_t fileSize)
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132 {
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133 #if !defined(__EMSCRIPTEN__)
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134 boost::mutex::scoped_lock lock(mutex_);
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135 #endif
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136
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137 if (fileSize >= cacheSize_)
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138 {
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139 cache_.reset(NULL);
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140 largeDicom_.reset(dicom);
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141 largeId_ = id;
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142 largeSize_ = fileSize;
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143 }
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144 else
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145 {
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146 largeDicom_.reset(NULL);
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147 largeSize_ = 0;
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148
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149 if (cache_.get() == NULL)
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150 {
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151 cache_.reset(new MemoryObjectCache);
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152 cache_->SetMaximumSize(cacheSize_);
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153 }
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154
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155 cache_->Acquire(id, new Item(dicom, fileSize));
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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 ParsedDicomCache::Accessor::Accessor(ParsedDicomCache& that,
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161 const std::string& id) :
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162 #if !defined(__EMSCRIPTEN__)
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163 lock_(that.mutex_),
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164 #endif
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165 id_(id),
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166 file_(NULL),
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167 fileSize_(0)
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168 {
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169 if (that.largeDicom_.get() != NULL &&
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170 that.largeId_ == id)
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171 {
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172 file_ = that.largeDicom_.get();
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173 fileSize_ = that.largeSize_;
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174 }
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175 else if (that.cache_.get() != NULL)
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176 {
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177 accessor_.reset(new MemoryObjectCache::Accessor(
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178 *that.cache_, id, true /* unique */));
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179 if (accessor_->IsValid())
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180 {
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181 const Item& item = dynamic_cast<const Item&>(accessor_->GetValue());
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182 file_ = &item.GetDicom();
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183 fileSize_ = item.GetMemoryUsage();
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184 }
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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 bool ParsedDicomCache::Accessor::IsValid() const
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190 {
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191 return file_ != NULL;
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192 }
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193
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194
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195 ParsedDicomFile& ParsedDicomCache::Accessor::GetDicom() const
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196 {
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197 if (IsValid())
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198 {
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199 assert(file_ != NULL);
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200 return *file_;
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201 }
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202 else
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203 {
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204 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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205 }
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206 }
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207
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208
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209 size_t ParsedDicomCache::Accessor::GetFileSize() const
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210 {
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211 if (IsValid())
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212 {
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213 return fileSize_;
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214 }
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215 else
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216 {
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217 throw OrthancException(ErrorCode_BadSequenceOfCalls);
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218 }
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219 }
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220 }