Mercurial > hg > orthanc
annotate OrthancServer/OrthancFindRequestHandler.cpp @ 611:9924aec1d694 find-move-scp
filtering on modalities
| author | Sebastien Jodogne <s.jodogne@gmail.com> |
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| date | Fri, 18 Oct 2013 13:12:18 +0200 |
| parents | 5ba825b87b21 |
| children | fdd5f7f9c4d7 |
| rev | line source |
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1 /** |
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2 * Orthanc - A Lightweight, RESTful DICOM Store |
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3 * Copyright (C) 2012-2013 Medical Physics Department, CHU of Liege, |
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4 * 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 #include "OrthancFindRequestHandler.h" |
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33 |
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34 #include <glog/logging.h> |
| 608 | 35 #include <boost/regex.hpp> |
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36 |
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37 #include "../Core/DicomFormat/DicomArray.h" |
| 608 | 38 #include "ServerToolbox.h" |
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39 |
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40 namespace Orthanc |
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41 { |
| 610 | 42 static std::string ToLowerCase(const std::string& s) |
| 43 { | |
| 44 std::string result = s; | |
| 45 Toolbox::ToLowerCase(result); | |
| 46 return result; | |
| 47 } | |
| 48 | |
| 608 | 49 static bool ApplyRangeConstraint(const std::string& value, |
| 50 const std::string& constraint) | |
| 51 { | |
| 610 | 52 size_t separator = constraint.find('-'); |
| 53 std::string lower = ToLowerCase(constraint.substr(0, separator)); | |
| 54 std::string upper = ToLowerCase(constraint.substr(separator + 1)); | |
| 55 std::string v = ToLowerCase(value); | |
| 56 | |
| 57 if (lower.size() == 0 && upper.size() == 0) | |
| 58 { | |
| 59 return false; | |
| 60 } | |
| 61 | |
| 62 if (lower.size() == 0) | |
| 63 { | |
| 64 return v <= upper; | |
| 65 } | |
| 66 | |
| 67 if (upper.size() == 0) | |
| 68 { | |
| 69 return v >= lower; | |
| 70 } | |
| 71 | |
| 72 return (v >= lower && v <= upper); | |
| 608 | 73 } |
| 74 | |
| 75 | |
| 76 static bool ApplyListConstraint(const std::string& value, | |
| 77 const std::string& constraint) | |
| 78 { | |
| 610 | 79 std::string v1 = ToLowerCase(value); |
| 608 | 80 |
| 81 std::vector<std::string> items; | |
| 82 Toolbox::TokenizeString(items, constraint, '\\'); | |
| 83 | |
| 84 for (size_t i = 0; i < items.size(); i++) | |
| 85 { | |
| 86 Toolbox::ToLowerCase(items[i]); | |
| 87 if (items[i] == v1) | |
| 88 { | |
| 89 return true; | |
| 90 } | |
| 91 } | |
| 92 | |
| 93 return false; | |
| 94 } | |
| 95 | |
| 96 | |
| 97 static bool Matches(const std::string& value, | |
| 98 const std::string& constraint) | |
| 99 { | |
| 100 // http://www.itk.org/Wiki/DICOM_QueryRetrieve_Explained | |
| 101 // http://dicomiseasy.blogspot.be/2012/01/dicom-queryretrieve-part-i.html | |
| 102 | |
| 103 if (constraint.find('-') != std::string::npos) | |
| 104 { | |
| 105 return ApplyRangeConstraint(value, constraint); | |
| 106 } | |
| 107 | |
| 108 if (constraint.find('\\') != std::string::npos) | |
| 109 { | |
| 110 return ApplyListConstraint(value, constraint); | |
| 111 } | |
| 112 | |
| 113 if (constraint.find('*') != std::string::npos || | |
| 114 constraint.find('?') != std::string::npos) | |
| 115 { | |
| 116 // TODO - Cache the constructed regular expression | |
| 117 boost::regex pattern(Toolbox::WildcardToRegularExpression(constraint), | |
| 118 boost::regex::icase /* case insensitive search */); | |
| 119 return boost::regex_match(value, pattern); | |
| 120 } | |
| 121 else | |
| 122 { | |
| 610 | 123 return ToLowerCase(value) == ToLowerCase(constraint); |
| 608 | 124 } |
| 125 } | |
| 126 | |
| 127 | |
| 128 static bool LookupOneInstance(std::string& result, | |
| 129 ServerIndex& index, | |
| 130 const std::string& id, | |
| 131 ResourceType type) | |
| 132 { | |
| 133 if (type == ResourceType_Instance) | |
| 134 { | |
| 135 result = id; | |
| 136 return true; | |
| 137 } | |
| 138 | |
| 139 std::string childId; | |
| 140 | |
| 141 { | |
| 142 std::list<std::string> children; | |
| 143 index.GetChildInstances(children, id); | |
| 144 | |
| 145 if (children.size() == 0) | |
| 146 { | |
| 147 return false; | |
| 148 } | |
| 149 | |
| 150 childId = children.front(); | |
| 151 } | |
| 152 | |
| 153 return LookupOneInstance(result, index, childId, GetChildResourceType(type)); | |
| 154 } | |
| 155 | |
| 156 | |
| 157 static bool Matches(const Json::Value& resource, | |
| 158 const DicomArray& query) | |
| 159 { | |
| 160 for (size_t i = 0; i < query.GetSize(); i++) | |
| 161 { | |
| 162 if (query.GetElement(i).GetValue().IsNull() || | |
| 163 query.GetElement(i).GetTag() == DICOM_TAG_QUERY_RETRIEVE_LEVEL || | |
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164 query.GetElement(i).GetTag() == DICOM_TAG_SPECIFIC_CHARACTER_SET || |
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165 query.GetElement(i).GetTag() == DICOM_TAG_MODALITIES_IN_STUDY) |
| 608 | 166 { |
| 167 continue; | |
| 168 } | |
| 169 | |
| 170 std::string tag = query.GetElement(i).GetTag().Format(); | |
| 171 std::string value; | |
| 172 if (resource.isMember(tag)) | |
| 173 { | |
| 174 value = resource.get(tag, Json::arrayValue).get("Value", "").asString(); | |
| 175 } | |
| 176 | |
| 177 if (!Matches(value, query.GetElement(i).GetValue().AsString())) | |
| 178 { | |
| 179 return false; | |
| 180 } | |
| 181 } | |
| 182 | |
| 183 return true; | |
| 184 } | |
| 185 | |
| 186 | |
| 187 static void AddAnswer(DicomFindAnswers& answers, | |
| 188 const Json::Value& resource, | |
| 189 const DicomArray& query) | |
| 190 { | |
| 191 DicomMap result; | |
| 192 | |
| 193 for (size_t i = 0; i < query.GetSize(); i++) | |
| 194 { | |
| 195 if (query.GetElement(i).GetTag() != DICOM_TAG_QUERY_RETRIEVE_LEVEL && | |
| 196 query.GetElement(i).GetTag() != DICOM_TAG_SPECIFIC_CHARACTER_SET) | |
| 197 { | |
| 198 std::string tag = query.GetElement(i).GetTag().Format(); | |
| 199 std::string value; | |
| 200 if (resource.isMember(tag)) | |
| 201 { | |
| 202 value = resource.get(tag, Json::arrayValue).get("Value", "").asString(); | |
| 203 result.SetValue(query.GetElement(i).GetTag(), value); | |
| 204 } | |
| 205 } | |
| 206 } | |
| 207 | |
| 208 answers.Add(result); | |
| 209 } | |
| 210 | |
| 211 | |
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212 void OrthancFindRequestHandler::Handle(const DicomMap& input, |
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213 DicomFindAnswers& answers) |
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214 { |
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215 LOG(WARNING) << "Find-SCU request received"; |
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216 |
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217 /** |
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218 * Retrieve the query level. |
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219 **/ |
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220 |
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221 const DicomValue* levelTmp = input.TestAndGetValue(DICOM_TAG_QUERY_RETRIEVE_LEVEL); |
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222 if (levelTmp == NULL) |
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223 { |
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224 throw OrthancException(ErrorCode_BadRequest); |
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225 } |
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226 |
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227 ResourceType level = StringToResourceType(levelTmp->AsString().c_str()); |
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228 |
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229 if (level != ResourceType_Patient && |
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230 level != ResourceType_Study && |
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231 level != ResourceType_Series) |
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232 { |
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233 throw OrthancException(ErrorCode_NotImplemented); |
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234 } |
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235 |
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236 |
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237 /** |
| 608 | 238 * Retrieve all the resources for this query level. |
| 239 **/ | |
| 240 | |
| 241 Json::Value resources; | |
| 242 context_.GetIndex().GetAllUuids(resources, level); | |
| 243 assert(resources.type() == Json::arrayValue); | |
| 244 | |
| 245 // TODO : Speed up using MainDicomTags (to avoid looping over ALL | |
| 246 // the resources and reading the JSON file for each of them) | |
| 247 | |
| 248 | |
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249 |
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250 /** |
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251 * Apply filtering on modalities for studies, if asked (this is an |
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252 * extension to standard DICOM) |
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253 * http://www.medicalconnections.co.uk/kb/Filtering_on_and_Retrieving_the_Modality_in_a_C_FIND |
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254 **/ |
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255 |
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256 if (level == ResourceType_Study && |
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257 input.HasTag(DICOM_TAG_MODALITIES_IN_STUDY)) |
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258 { |
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259 const DicomValue& v = input.GetValue(DICOM_TAG_MODALITIES_IN_STUDY); |
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260 if (!v.IsNull()) |
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261 { |
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262 // Move the allowed modalities into a "std::set" |
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263 std::vector<std::string> tmp; |
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264 Toolbox::TokenizeString(tmp, v.AsString(), '\\'); |
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265 |
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266 std::set<std::string> modalities; |
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267 for (size_t i = 0; i < tmp.size(); i++) |
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268 { |
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269 modalities.insert(tmp[i]); |
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270 } |
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271 |
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272 // Loop over the studies |
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273 Json::Value studies = resources; |
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274 resources = Json::arrayValue; |
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275 |
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276 for (Json::Value::ArrayIndex i = 0; i < studies.size(); i++) |
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277 { |
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278 // We are considering a single study. Check whether one of |
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279 // its child series matches one of the modalities. |
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280 Json::Value study; |
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281 if (context_.GetIndex().LookupResource(study, studies[i].asString(), ResourceType_Study)) |
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282 { |
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283 // Loop over the series of the considered study. |
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284 for (Json::Value::ArrayIndex j = 0; j < study["Series"].size(); j++) // (*) |
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285 { |
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286 Json::Value series; |
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287 if (context_.GetIndex().LookupResource(series, study["Series"][j].asString(), ResourceType_Series)) |
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288 { |
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289 // Get the modality of this series |
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290 if (series["MainDicomTags"].isMember("Modality")) |
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291 { |
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292 std::string modality = series["MainDicomTags"]["Modality"].asString(); |
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293 if (modalities.find(modality) != modalities.end()) |
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294 { |
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295 // This series of the considered study matches one |
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296 // of the required modalities. Take the study into |
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297 // consideration for future filtering. |
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298 resources.append(studies[i]); |
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299 |
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300 // We have finished considering this study. Break the study loop at (*). |
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301 break; |
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302 } |
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303 } |
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304 } |
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305 } |
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306 } |
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307 } |
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308 } |
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309 } |
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310 |
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311 |
| 608 | 312 /** |
| 313 * Loop over all the resources for this query level. | |
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314 **/ |
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315 |
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316 DicomArray query(input); |
| 608 | 317 for (Json::Value::ArrayIndex i = 0; i < resources.size(); i++) |
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318 { |
| 608 | 319 try |
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320 { |
| 608 | 321 std::string instance; |
| 322 if (LookupOneInstance(instance, context_.GetIndex(), resources[i].asString(), level)) | |
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323 { |
| 608 | 324 Json::Value resource; |
| 325 context_.ReadJson(resource, instance); | |
| 326 | |
| 327 if (Matches(resource, query)) | |
| 328 { | |
| 329 AddAnswer(answers, resource, query); | |
| 330 } | |
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331 } |
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332 } |
| 608 | 333 catch (OrthancException&) |
| 334 { | |
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335 // This resource has probably been deleted during the find request |
| 608 | 336 } |
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337 } |
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338 } |
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339 } |