src/Model/Model_Objects.cpp

   1 // Copyright (C) 2014-20xx CEA/DEN, EDF R&D
   2
   3 // File:        Model_Objects.cxx
   4 // Created:     15 May 2015
   5 // Author:      Mikhail PONIKAROV
   6
   7 #include <Model_Objects.h>
   8 #include <Model_Data.h>
   9 #include <Model_Document.h>
  10 #include <Model_Events.h>
  11 #include <Model_Session.h>
  12 #include <Model_ResultPart.h>
  13 #include <Model_ResultConstruction.h>
  14 #include <Model_ResultBody.h>
  15 #include <Model_ResultGroup.h>
  16 #include <Model_ResultParameter.h>
  17 #include <ModelAPI_Validator.h>
  18 #include <ModelAPI_CompositeFeature.h>
  19
  20 #include <Events_Loop.h>
  21 #include <Events_Error.h>
  22
  23 #include <TDataStd_Integer.hxx>
  24 #include <TDataStd_Comment.hxx>
  25 #include <TDF_ChildIDIterator.hxx>
  26 #include <TDataStd_ReferenceArray.hxx>
  27 #include <TDataStd_HLabelArray1.hxx>
  28 #include <TDataStd_Name.hxx>
  29 #include <TDF_Reference.hxx>
  30 #include <TDF_ChildIDIterator.hxx>
  31 #include <TDF_LabelMapHasher.hxx>
  32
  33 static const int TAG_OBJECTS = 2;  // tag of the objects sub-tree (features, results)
  34
  35 // feature sub-labels
  36 static const int TAG_FEATURE_ARGUMENTS = 1;  ///< where the arguments are located
  37 static const int TAG_FEATURE_RESULTS = 2;  ///< where the results are located
  38
  39 ///
  40 /// 0:1:2 - where features are located
  41 /// 0:1:2:N:1 - data of the feature N
  42 /// 0:1:2:N:2:K:1 - data of the K result of the feature N
  43
  44 Model_Objects::Model_Objects(TDF_Label theMainLab) : myMain(theMainLab)
  45 {
  46 }
  47
  48 void Model_Objects::setOwner(DocumentPtr theDoc)
  49 {
  50   myDoc = theDoc;
  51   // update all fields and recreate features and result objects if needed
  52   synchronizeFeatures(false, true, true);
  53   myHistory.clear();
  54 }
  55
  56 Model_Objects::~Model_Objects()
  57 {
  58   // delete all features of this document
  59   Events_Loop* aLoop = Events_Loop::loop();
  60   NCollection_DataMap<TDF_Label, FeaturePtr>::Iterator aFeaturesIter(myFeatures);
  61   for(; aFeaturesIter.More(); aFeaturesIter.Next()) {
  62     FeaturePtr aFeature = aFeaturesIter.Value();
  63     static Events_ID EVENT_DISP = aLoop->eventByName(EVENT_OBJECT_TO_REDISPLAY);
  64     ModelAPI_EventCreator::get()->sendDeleted(myDoc, ModelAPI_Feature::group());
  65     ModelAPI_EventCreator::get()->sendUpdated(aFeature, EVENT_DISP);
  66     aFeature->eraseResults();
  67     aFeature->erase();
  68   }
  69   myFeatures.Clear();
  70   aLoop->flush(Events_Loop::eventByName(EVENT_OBJECT_DELETED));
  71   aLoop->flush(Events_Loop::eventByName(EVENT_OBJECT_TO_REDISPLAY));
  72
  73 }
  74
  75 /// Appends to the array of references a new referenced label
  76 static void AddToRefArray(TDF_Label& theArrayLab, TDF_Label& theReferenced, TDF_Label& thePrevLab)
  77 {
  78   Handle(TDataStd_ReferenceArray) aRefs;
  79   if (!theArrayLab.FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs)) {
  80     aRefs = TDataStd_ReferenceArray::Set(theArrayLab, 0, 0);
  81     aRefs->SetValue(0, theReferenced);
  82   } else {  // extend array by one more element
  83     Handle(TDataStd_HLabelArray1) aNewArray = new TDataStd_HLabelArray1(aRefs->Lower(),
  84                                                                         aRefs->Upper() + 1);
  85     int aPassedPrev = 0; // prev feature is found and passed
  86     if (thePrevLab.IsNull()) { // null means that inserted feature must be the first
  87       aNewArray->SetValue(aRefs->Lower(), theReferenced);
  88       aPassedPrev = 1;
  89     }
  90     for (int a = aRefs->Lower(); a <= aRefs->Upper(); a++) {
  91       aNewArray->SetValue(a + aPassedPrev, aRefs->Value(a));
  92       if (!aPassedPrev && aRefs->Value(a).IsEqual(thePrevLab)) {
  93         aPassedPrev = 1;
  94         aNewArray->SetValue(a + 1, theReferenced);
  95       }
  96     }
  97     if (!aPassedPrev) // not found: unknown situation
  98       aNewArray->SetValue(aRefs->Upper() + 1, theReferenced);
  99     aRefs->SetInternalArray(aNewArray);
 100   }
 101 }
 102
 103 void Model_Objects::addFeature(FeaturePtr theFeature, const FeaturePtr theAfterThis)
 104 {
 105   if (!theFeature->isAction()) {  // do not add action to the data model
 106     TDF_Label aFeaturesLab = featuresLabel();
 107     TDF_Label aFeatureLab = aFeaturesLab.NewChild();
 108     // store feature in the features array: before "initData" because in macro features
 109     // in initData it creates new features, appeared later than this
 110     TDF_Label aPrevFeateureLab;
 111     if (theAfterThis.get()) { // searching for the previous feature label
 112       std::shared_ptr<Model_Data> aPrevData =
 113         std::dynamic_pointer_cast<Model_Data>(theAfterThis->data());
 114       if (aPrevData.get()) {
 115         aPrevFeateureLab = aPrevData->label().Father();
 116       }
 117     }
 118     AddToRefArray(aFeaturesLab, aFeatureLab, aPrevFeateureLab);
 119
 120     initData(theFeature, aFeatureLab, TAG_FEATURE_ARGUMENTS);
 121     // keep the feature ID to restore document later correctly
 122     TDataStd_Comment::Set(aFeatureLab, theFeature->getKind().c_str());
 123     myFeatures.Bind(aFeatureLab, theFeature);
 124     // event: feature is added
 125     static Events_ID anEvent = Events_Loop::eventByName(EVENT_OBJECT_CREATED);
 126     ModelAPI_EventCreator::get()->sendUpdated(theFeature, anEvent);
 127     theFeature->setDisabled(false); // by default created feature is enabled
 128     updateHistory(ModelAPI_Feature::group());
 129   } else { // make feature has not-null data anyway
 130     theFeature->setData(Model_Data::invalidData());
 131     theFeature->setDoc(myDoc);
 132   }
 133 }
 134
 135 /// Appends to the array of references a new referenced label.
 136 /// If theIndex is not -1, removes element at this index, not theReferenced.
 137 /// \returns the index of removed element
 138 static int RemoveFromRefArray(TDF_Label theArrayLab, TDF_Label theReferenced,
 139   const int theIndex = -1)
 140 {
 141   int aResult = -1;  // no returned
 142   Handle(TDataStd_ReferenceArray) aRefs;
 143   if (theArrayLab.FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs)) {
 144     if (aRefs->Length() == 1) {  // just erase an array
 145       if ((theIndex == -1 && aRefs->Value(0) == theReferenced) || theIndex == 0) {
 146         theArrayLab.ForgetAttribute(TDataStd_ReferenceArray::GetID());
 147       }
 148       aResult = 0;
 149     } else {  // reduce the array
 150       Handle(TDataStd_HLabelArray1) aNewArray = new TDataStd_HLabelArray1(aRefs->Lower(),
 151                                                                           aRefs->Upper() - 1);
 152       int aCount = aRefs->Lower();
 153       for (int a = aCount; a <= aRefs->Upper(); a++, aCount++) {
 154         if ((theIndex == -1 && aRefs->Value(a) == theReferenced) || theIndex == a) {
 155           aCount--;
 156           aResult = a;
 157         } else {
 158           aNewArray->SetValue(aCount, aRefs->Value(a));
 159         }
 160       }
 161       aRefs->SetInternalArray(aNewArray);
 162     }
 163   }
 164   return aResult;
 165 }
 166
 167 void Model_Objects::refsToFeature(FeaturePtr theFeature,
 168   std::set<std::shared_ptr<ModelAPI_Feature> >& theRefs, const bool isSendError)
 169 {
 170   // check the feature: it must have no depended objects on it
 171   // the dependencies can be in the feature results
 172   std::list<ResultPtr>::const_iterator aResIter = theFeature->results().cbegin();
 173   for(; aResIter != theFeature->results().cend(); aResIter++) {
 174     ResultPtr aResult = (*aResIter);
 175     std::shared_ptr<Model_Data> aData =
 176       std::dynamic_pointer_cast<Model_Data>(aResult->data());
 177     if (aData.get() != NULL) {
 178       const std::set<AttributePtr>& aRefs = aData->refsToMe();
 179       std::set<AttributePtr>::const_iterator aRefIt = aRefs.begin(), aRefLast = aRefs.end();
 180       for(; aRefIt != aRefLast; aRefIt++) {
 181         FeaturePtr aFeature = std::dynamic_pointer_cast<ModelAPI_Feature>((*aRefIt)->owner());
 182         if (aFeature.get() != NULL)
 183           theRefs.insert(aFeature);
 184       }
 185     }
 186   }
 187   // the dependencies can be in the feature itself
 188   std::shared_ptr<Model_Data> aData =
 189       std::dynamic_pointer_cast<Model_Data>(theFeature->data());
 190   if (aData && !aData->refsToMe().empty()) {
 191     const std::set<AttributePtr>& aRefs = aData->refsToMe();
 192     std::set<AttributePtr>::const_iterator aRefIt = aRefs.begin(), aRefLast = aRefs.end();
 193     for(; aRefIt != aRefLast; aRefIt++) {
 194       FeaturePtr aFeature = std::dynamic_pointer_cast<ModelAPI_Feature>((*aRefIt)->owner());
 195       if (aFeature.get() != NULL)
 196         theRefs.insert(aFeature);
 197     }
 198   }
 199
 200   if (!theRefs.empty() && isSendError) {
 201     Events_Error::send(
 202       "Feature '" + theFeature->data()->name() + "' is used and can not be deleted");
 203   }
 204 }
 205
 206 void Model_Objects::removeFeature(FeaturePtr theFeature)
 207 {
 208   std::shared_ptr<Model_Data> aData = std::static_pointer_cast<Model_Data>(theFeature->data());
 209   if (aData && aData->isValid()) {
 210     // checking that the sub-element of composite feature is removed: if yes, inform the owner
 211     std::set<std::shared_ptr<ModelAPI_Feature> > aRefs;
 212     refsToFeature(theFeature, aRefs, false);
 213     std::set<std::shared_ptr<ModelAPI_Feature> >::iterator aRefIter = aRefs.begin();
 214     for(; aRefIter != aRefs.end(); aRefIter++) {
 215       std::shared_ptr<ModelAPI_CompositeFeature> aComposite =
 216         std::dynamic_pointer_cast<ModelAPI_CompositeFeature>(*aRefIter);
 217       if (aComposite.get()) {
 218         aComposite->removeFeature(theFeature);
 219       }
 220     }
 221     // this must be before erase since theFeature erasing removes all information about
 222     // the feature results and groups of results
 223     // To reproduce: create sketch, extrusion, remove sketch => constructions tree is not updated
 224     clearHistory(theFeature);
 225     // erase fields
 226     theFeature->erase();
 227
 228     TDF_Label aFeatureLabel = aData->label().Father();
 229     if (myFeatures.IsBound(aFeatureLabel))
 230       myFeatures.UnBind(aFeatureLabel);
 231
 232     static Events_ID EVENT_DISP = Events_Loop::loop()->eventByName(EVENT_OBJECT_TO_REDISPLAY);
 233     ModelAPI_EventCreator::get()->sendUpdated(theFeature, EVENT_DISP);
 234     // erase all attributes under the label of feature
 235     aFeatureLabel.ForgetAllAttributes();
 236     // remove it from the references array
 237     RemoveFromRefArray(featuresLabel(), aFeatureLabel);
 238     // event: feature is deleted
 239     ModelAPI_EventCreator::get()->sendDeleted(theFeature->document(), ModelAPI_Feature::group());
 240     // the redisplay signal should be flushed in order to erase the feature presentation in the viewer
 241     Events_Loop::loop()->flush(EVENT_DISP);
 242     updateHistory(ModelAPI_Feature::group());
 243   }
 244 }
 245
 246 void Model_Objects::moveFeature(FeaturePtr theMoved, FeaturePtr theAfterThis)
 247 {
 248   TDF_Label aFeaturesLab = featuresLabel();
 249   Handle(TDataStd_ReferenceArray) aRefs;
 250   if (!aFeaturesLab.FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs))
 251     return;
 252   TDF_Label anAfterLab, aMovedLab =
 253     std::dynamic_pointer_cast<Model_Data>(theMoved->data())->label().Father();
 254   if (theAfterThis.get())
 255     anAfterLab = std::dynamic_pointer_cast<Model_Data>(theAfterThis->data())->label().Father();
 256
 257   Handle(TDataStd_HLabelArray1) aNewArray =
 258     new TDataStd_HLabelArray1(aRefs->Lower(), aRefs->Upper());
 259   int aPassedMovedFrom = 0; // the prev feature location is found and passed
 260   int aPassedMovedTo = 0; // the feature is added and this location is passed
 261   if (!theAfterThis.get()) { // null means that inserted feature must be the first
 262     aNewArray->SetValue(aRefs->Lower(), aMovedLab);
 263     aPassedMovedTo = 1;
 264   }
 265   for (int a = aRefs->Lower(); a <= aRefs->Upper(); a++) {
 266     if (aPassedMovedTo == 0 && aRefs->Value(a) == anAfterLab) { // add two
 267       aPassedMovedTo++;
 268       aNewArray->SetValue(a - aPassedMovedFrom, anAfterLab);
 269       if (a + 1 - aPassedMovedFrom <= aRefs->Upper())
 270         aNewArray->SetValue(a + 1 - aPassedMovedFrom, aMovedLab);
 271     } else if (aPassedMovedFrom == 0 && aRefs->Value(a) == aMovedLab) { // skip
 272       aPassedMovedFrom++;
 273     } else { // just copy one
 274       if (a - aPassedMovedFrom + aPassedMovedTo <= aRefs->Upper())
 275         aNewArray->SetValue(a - aPassedMovedFrom + aPassedMovedTo, aRefs->Value(a));
 276     }
 277   }
 278   if (!aPassedMovedFrom || !aPassedMovedTo) {// not found: unknown situation
 279     if (!aPassedMovedFrom) {
 280       static std::string aMovedFromError("The moved feature is not found");
 281       Events_Error::send(aMovedFromError);
 282     } else {
 283       static std::string aMovedToError("The 'after' feature for movement is not found");
 284       Events_Error::send(aMovedToError);
 285     }
 286     return;
 287   }
 288   // store the new array
 289   aRefs->SetInternalArray(aNewArray);
 290   // update the feature and the history
 291   clearHistory(theMoved);
 292   static Events_ID EVENT_UPD = Events_Loop::loop()->eventByName(EVENT_OBJECT_UPDATED);
 293   ModelAPI_EventCreator::get()->sendUpdated(theMoved, EVENT_UPD);
 294 }
 295
 296 void Model_Objects::clearHistory(ObjectPtr theObj)
 297 {
 298   if (theObj) {
 299     const std::string aGroup = theObj->groupName();
 300     std::map<std::string, std::vector<ObjectPtr> >::iterator aHIter = myHistory.find(aGroup);
 301     if (aHIter != myHistory.end())
 302       myHistory.erase(aHIter); // erase from map => this means that it is not synchronized
 303     if (theObj->groupName() == ModelAPI_Feature::group()) { // clear results group of the feature
 304       FeaturePtr aFeature = std::dynamic_pointer_cast<ModelAPI_Feature>(theObj);
 305       std::string aResultGroup = featureResultGroup(aFeature);
 306       if (!aResultGroup.empty()) {
 307         std::map<std::string, std::vector<ObjectPtr> >::iterator aHIter =
 308           myHistory.find(aResultGroup);
 309         if (aHIter != myHistory.end())
 310           myHistory.erase(aHIter); // erase from map => this means that it is not synchronized
 311       }
 312     }
 313   }
 314 }
 315
 316 void Model_Objects::createHistory(const std::string& theGroupID)
 317 {
 318   std::map<std::string, std::vector<ObjectPtr> >::iterator aHIter = myHistory.find(theGroupID);
 319   if (aHIter == myHistory.end()) {
 320     myHistory[theGroupID] = std::vector<ObjectPtr>();
 321     std::vector<ObjectPtr>& aResult = myHistory[theGroupID];
 322     // iterate the array of references and get feature by feature from the array
 323     bool isFeature = theGroupID == ModelAPI_Feature::group();
 324     Handle(TDataStd_ReferenceArray) aRefs;
 325     if (featuresLabel().FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs)) {
 326       for(int a = aRefs->Lower(); a <= aRefs->Upper(); a++) {
 327         FeaturePtr aFeature = feature(aRefs->Value(a));
 328         if (aFeature.get()) {
 329           if (isFeature) { // here may be also disabled features
 330             if (aFeature->isInHistory()) {
 331               aResult.push_back(aFeature);
 332             }
 333           } else if (!aFeature->isDisabled()) { // iterate all results of not-disabled feature
 334             const std::list<std::shared_ptr<ModelAPI_Result> >& aResults = aFeature->results();
 335             std::list<std::shared_ptr<ModelAPI_Result> >::const_iterator aRIter = aResults.begin();
 336             for (; aRIter != aResults.cend(); aRIter++) {
 337               ResultPtr aRes = *aRIter;
 338               if (aRes->groupName() != theGroupID) break; // feature have only same group results
 339               if (!aRes->isDisabled() && aRes->isInHistory() && !aRes->isConcealed()) {
 340                 aResult.push_back(*aRIter);
 341               }
 342             }
 343           }
 344         }
 345       }
 346     }
 347   }
 348 }
 349
 350 void Model_Objects::updateHistory(const std::shared_ptr<ModelAPI_Object> theObject)
 351 {
 352   clearHistory(theObject);
 353 }
 354
 355 void Model_Objects::updateHistory(const std::string theGroup)
 356 {
 357   std::map<std::string, std::vector<ObjectPtr> >::iterator aHIter = myHistory.find(theGroup);
 358   if (aHIter != myHistory.end())
 359     myHistory.erase(aHIter); // erase from map => this means that it is not synchronized
 360 }
 361
 362 FeaturePtr Model_Objects::feature(TDF_Label theLabel) const
 363 {
 364   if (myFeatures.IsBound(theLabel))
 365     return myFeatures.Find(theLabel);
 366   return FeaturePtr();  // not found
 367 }
 368
 369 ObjectPtr Model_Objects::object(TDF_Label theLabel)
 370 {
 371   // try feature by label
 372   FeaturePtr aFeature = feature(theLabel);
 373   if (aFeature)
 374     return feature(theLabel);
 375   TDF_Label aFeatureLabel = theLabel.Father().Father();  // let's suppose it is result
 376   aFeature = feature(aFeatureLabel);
 377   if (aFeature) {
 378     const std::list<std::shared_ptr<ModelAPI_Result> >& aResults = aFeature->results();
 379     std::list<std::shared_ptr<ModelAPI_Result> >::const_iterator aRIter = aResults.cbegin();
 380     for (; aRIter != aResults.cend(); aRIter++) {
 381       std::shared_ptr<Model_Data> aResData = std::dynamic_pointer_cast<Model_Data>(
 382           (*aRIter)->data());
 383       if (aResData->label().Father().IsEqual(theLabel))
 384         return *aRIter;
 385     }
 386   }
 387   return FeaturePtr();  // not found
 388 }
 389
 390 ObjectPtr Model_Objects::object(const std::string& theGroupID, const int theIndex)
 391 {
 392   if (theIndex == -1)
 393     return ObjectPtr();
 394   createHistory(theGroupID);
 395   return myHistory[theGroupID][theIndex];
 396 }
 397
 398 std::shared_ptr<ModelAPI_Object> Model_Objects::objectByName(
 399     const std::string& theGroupID, const std::string& theName)
 400 {
 401   createHistory(theGroupID);
 402   std::vector<ObjectPtr>& allObjs = myHistory[theGroupID];
 403   std::vector<ObjectPtr>::iterator anObjIter = allObjs.begin();
 404   for(; anObjIter != allObjs.end(); anObjIter++) {
 405     if ((*anObjIter)->data()->name() == theName)
 406       return *anObjIter;
 407   }
 408   // not found
 409   return ObjectPtr();
 410 }
 411
 412 const int Model_Objects::index(std::shared_ptr<ModelAPI_Object> theObject)
 413 {
 414   std::string aGroup = theObject->groupName();
 415   createHistory(aGroup);
 416   std::vector<ObjectPtr>& allObjs = myHistory[aGroup];
 417   std::vector<ObjectPtr>::iterator anObjIter = allObjs.begin(); // iterate to search object
 418   for(int anIndex = 0; anObjIter != allObjs.end(); anObjIter++, anIndex++) {
 419     if ((*anObjIter) == theObject)
 420       return anIndex;
 421   }
 422   // not found
 423   return -1;
 424 }
 425
 426 int Model_Objects::size(const std::string& theGroupID)
 427 {
 428   createHistory(theGroupID);
 429   return myHistory[theGroupID].size();
 430 }
 431
 432 void Model_Objects::allResults(const std::string& theGroupID, std::list<ResultPtr>& theResults)
 433 {
 434   // iterate the array of references and get feature by feature from the array
 435   Handle(TDataStd_ReferenceArray) aRefs;
 436   if (featuresLabel().FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs)) {
 437     for(int a = aRefs->Lower(); a <= aRefs->Upper(); a++) {
 438       FeaturePtr aFeature = feature(aRefs->Value(a));
 439       if (aFeature.get()) {
 440         const std::list<std::shared_ptr<ModelAPI_Result> >& aResults = aFeature->results();
 441         std::list<std::shared_ptr<ModelAPI_Result> >::const_iterator aRIter = aResults.begin();
 442         for (; aRIter != aResults.cend(); aRIter++) {
 443           ResultPtr aRes = *aRIter;
 444           if (aRes->groupName() != theGroupID) break; // feature have only same group results
 445           if (aRes->isInHistory() && !aRes->isConcealed()) {
 446             theResults.push_back(*aRIter);
 447           }
 448         }
 449       }
 450     }
 451   }
 452 }
 453
 454
 455 TDF_Label Model_Objects::featuresLabel() const
 456 {
 457   return myMain.FindChild(TAG_OBJECTS);
 458 }
 459
 460 void Model_Objects::setUniqueName(FeaturePtr theFeature)
 461 {
 462   if (!theFeature->data()->name().empty())
 463     return;  // not needed, name is already defined
 464   std::string aName;  // result
 465   // first count all features of such kind to start with index = count + 1
 466   int aNumObjects = 0;
 467   NCollection_DataMap<TDF_Label, FeaturePtr>::Iterator aFIter(myFeatures);
 468   for (; aFIter.More(); aFIter.Next()) {
 469     if (aFIter.Value()->getKind() == theFeature->getKind())
 470       aNumObjects++;
 471   }
 472   // generate candidate name
 473   std::stringstream aNameStream;
 474   aNameStream << theFeature->getKind() << "_" << aNumObjects + 1;
 475   aName = aNameStream.str();
 476   // check this is unique, if not, increase index by 1
 477   for (aFIter.Initialize(myFeatures); aFIter.More();) {
 478     FeaturePtr aFeature = aFIter.Value();
 479     bool isSameName = aFeature->data()->name() == aName;
 480     if (!isSameName) {  // check also results to avoid same results names (actual for Parts)
 481       const std::list<std::shared_ptr<ModelAPI_Result> >& aResults = aFeature->results();
 482       std::list<std::shared_ptr<ModelAPI_Result> >::const_iterator aRIter = aResults.begin();
 483       for (; aRIter != aResults.cend(); aRIter++) {
 484         isSameName = (*aRIter)->data()->name() == aName;
 485       }
 486     }
 487     if (isSameName) {
 488       aNumObjects++;
 489       std::stringstream aNameStream;
 490       aNameStream << theFeature->getKind() << "_" << aNumObjects + 1;
 491       aName = aNameStream.str();
 492       // reinitialize iterator to make sure a new name is unique
 493       aFIter.Initialize(myFeatures);
 494     } else
 495       aFIter.Next();
 496   }
 497   theFeature->data()->setName(aName);
 498 }
 499
 500 void Model_Objects::initData(ObjectPtr theObj, TDF_Label theLab, const int theTag)
 501 {
 502   std::shared_ptr<Model_Data> aData(new Model_Data);
 503   aData->setLabel(theLab.FindChild(theTag));
 504   aData->setObject(theObj);
 505   theObj->setDoc(myDoc);
 506   theObj->setData(aData);
 507   FeaturePtr aFeature = std::dynamic_pointer_cast<ModelAPI_Feature>(theObj);
 508   if (aFeature) {
 509     setUniqueName(aFeature);  // must be before "initAttributes" because duplicate part uses name
 510   }
 511   theObj->initAttributes();
 512 }
 513
 514 void Model_Objects::synchronizeFeatures(
 515   const bool theMarkUpdated, const bool theUpdateReferences, const bool theFlush)
 516 {
 517   Model_Document* anOwner = std::dynamic_pointer_cast<Model_Document>(myDoc).get();
 518   if (!anOwner) // this may happen on creation of document: nothing there, so nothing to synchronize
 519     return;
 520   // after all updates, sends a message that groups of features were created or updated
 521   Events_Loop* aLoop = Events_Loop::loop();
 522   static Events_ID aDispEvent = aLoop->eventByName(EVENT_OBJECT_TO_REDISPLAY);
 523   static Events_ID aCreateEvent = Events_Loop::eventByName(EVENT_OBJECT_CREATED);
 524   static Events_ID anUpdateEvent = Events_Loop::eventByName(EVENT_OBJECT_UPDATED);
 525   static Events_ID aRedispEvent = aLoop->eventByName(EVENT_OBJECT_TO_REDISPLAY);
 526   static Events_ID aDeleteEvent = Events_Loop::eventByName(EVENT_OBJECT_DELETED);
 527   static Events_ID aToHideEvent = aLoop->eventByName(EVENT_OBJECT_TO_REDISPLAY);
 528   bool isActive = aLoop->activateFlushes(false);
 529
 530   // update all objects by checking are they on labels or not
 531   std::set<FeaturePtr> aNewFeatures, aKeptFeatures;
 532   TDF_ChildIDIterator aLabIter(featuresLabel(), TDataStd_Comment::GetID());
 533   for (; aLabIter.More(); aLabIter.Next()) {
 534     TDF_Label aFeatureLabel = aLabIter.Value()->Label();
 535     FeaturePtr aFeature;
 536     if (!myFeatures.IsBound(aFeatureLabel)) {  // a new feature is inserted
 537       // create a feature
 538       aFeature = std::dynamic_pointer_cast<Model_Session>(ModelAPI_Session::get())->createFeature(
 539         TCollection_AsciiString(Handle(TDataStd_Comment)::DownCast(aLabIter.Value())->Get())
 540         .ToCString(), anOwner);
 541       if (!aFeature) {  // somethig is wrong, most probably, the opened document has invalid structure
 542         Events_Error::send("Invalid type of object in the document");
 543         aLabIter.Value()->Label().ForgetAllAttributes();
 544         continue;
 545       }
 546       // this must be before "setData" to redo the sketch line correctly
 547       myFeatures.Bind(aFeatureLabel, aFeature);
 548       aNewFeatures.insert(aFeature);
 549       initData(aFeature, aFeatureLabel, TAG_FEATURE_ARGUMENTS);
 550       updateHistory(aFeature);
 551       aFeature->setDisabled(false); // by default created feature is enabled (this allows to recreate the results before "setCurrent" is called)
 552
 553       // event: model is updated
 554       ModelAPI_EventCreator::get()->sendUpdated(aFeature, aCreateEvent);
 555     } else {  // nothing is changed, both iterators are incremented
 556       aFeature = myFeatures.Find(aFeatureLabel);
 557       aKeptFeatures.insert(aFeature);
 558       if (theMarkUpdated) {
 559         ModelAPI_EventCreator::get()->sendUpdated(aFeature, anUpdateEvent);
 560       }
 561     }
 562   }
 563   // update results of the features (after features created because they may be connected, like sketch and sub elements)
 564   std::list<FeaturePtr> aComposites; // composites must be updated after their subs (issue 360)
 565   TDF_ChildIDIterator aLabIter2(featuresLabel(), TDataStd_Comment::GetID());
 566   for (; aLabIter2.More(); aLabIter2.Next()) {
 567     TDF_Label aFeatureLabel = aLabIter2.Value()->Label();
 568     if (myFeatures.IsBound(aFeatureLabel)) {  // a new feature is inserted
 569       FeaturePtr aFeature = myFeatures.Find(aFeatureLabel);
 570       if (std::dynamic_pointer_cast<ModelAPI_CompositeFeature>(aFeature).get())
 571         aComposites.push_back(aFeature);
 572       updateResults(aFeature);
 573     }
 574   }
 575   std::list<FeaturePtr>::iterator aComposite = aComposites.begin();
 576   for(; aComposite != aComposites.end(); aComposite++) {
 577     updateResults(*aComposite);
 578   }
 579
 580   // check all features are checked: if not => it was removed
 581   NCollection_DataMap<TDF_Label, FeaturePtr>::Iterator aFIter(myFeatures);
 582   while (aFIter.More()) {
 583     if (aKeptFeatures.find(aFIter.Value()) == aKeptFeatures.end()
 584       && aNewFeatures.find(aFIter.Value()) == aNewFeatures.end()) {
 585         FeaturePtr aFeature = aFIter.Value();
 586         // event: model is updated
 587         //if (aFeature->isInHistory()) {
 588         ModelAPI_EventCreator::get()->sendDeleted(myDoc, ModelAPI_Feature::group());
 589         //}
 590         // results of this feature must be redisplayed (hided)
 591         // redisplay also removed feature (used for sketch and AISObject)
 592         ModelAPI_EventCreator::get()->sendUpdated(aFeature, aRedispEvent);
 593         updateHistory(aFeature);
 594         aFeature->erase();
 595         // unbind after the "erase" call: on abort sketch is removes sub-objects that corrupts aFIter
 596         myFeatures.UnBind(aFIter.Key());
 597         // reinitialize iterator because unbind may corrupt the previous order in the map
 598         aFIter.Initialize(myFeatures);
 599     } else
 600       aFIter.Next();
 601   }
 602
 603   if (theUpdateReferences) {
 604     synchronizeBackRefs();
 605   }
 606   if (theMarkUpdated) { // this means there is no control what was modified => remove history cash
 607     myHistory.clear();
 608   }
 609
 610   anOwner->executeFeatures() = false;
 611   aLoop->activateFlushes(isActive);
 612
 613   if (theFlush) {
 614     aLoop->flush(aCreateEvent);
 615     aLoop->flush(aDeleteEvent);
 616     aLoop->flush(anUpdateEvent);
 617     aLoop->flush(aRedispEvent);
 618     aLoop->flush(aToHideEvent);
 619   }
 620   anOwner->executeFeatures() = true;
 621 }
 622
 623 void Model_Objects::synchronizeBackRefs()
 624 {
 625   // keeps the concealed flags of result to catch the change and create created/deleted events
 626   std::list<std::pair<ResultPtr, bool> > aConcealed;
 627   // first cycle: erase all data about back-references
 628   NCollection_DataMap<TDF_Label, FeaturePtr>::Iterator aFeatures(myFeatures);
 629   for(; aFeatures.More(); aFeatures.Next()) {
 630     FeaturePtr aFeature = aFeatures.Value();
 631     std::shared_ptr<Model_Data> aFData =
 632       std::dynamic_pointer_cast<Model_Data>(aFeature->data());
 633     if (aFData) {
 634       aFData->eraseBackReferences();
 635     }
 636     const std::list<std::shared_ptr<ModelAPI_Result> >& aResults = aFeature->results();
 637     std::list<std::shared_ptr<ModelAPI_Result> >::const_iterator aRIter = aResults.begin();
 638     for (; aRIter != aResults.cend(); aRIter++) {
 639       std::shared_ptr<Model_Data> aResData =
 640         std::dynamic_pointer_cast<Model_Data>((*aRIter)->data());
 641       if (aResData) {
 642         aConcealed.push_back(std::pair<ResultPtr, bool>(*aRIter, (*aRIter)->isConcealed()));
 643         aResData->eraseBackReferences();
 644       }
 645     }
 646   }
 647
 648   // second cycle: set new back-references: only features may have reference, iterate only them
 649   ModelAPI_ValidatorsFactory* aValidators = ModelAPI_Session::get()->validators();
 650   for(aFeatures.Initialize(myFeatures); aFeatures.More(); aFeatures.Next()) {
 651     FeaturePtr aFeature = aFeatures.Value();
 652     std::shared_ptr<Model_Data> aFData =
 653       std::dynamic_pointer_cast<Model_Data>(aFeature->data());
 654     if (aFData) {
 655       std::list<std::pair<std::string, std::list<ObjectPtr> > > aRefs;
 656       aFData->referencesToObjects(aRefs);
 657       std::list<std::pair<std::string, std::list<ObjectPtr> > >::iterator
 658         aRefsIter = aRefs.begin();
 659       for(; aRefsIter != aRefs.end(); aRefsIter++) {
 660         std::list<ObjectPtr>::iterator aRefTo = aRefsIter->second.begin();
 661         for(; aRefTo != aRefsIter->second.end(); aRefTo++) {
 662           if (*aRefTo) {
 663             std::shared_ptr<Model_Data> aRefData =
 664               std::dynamic_pointer_cast<Model_Data>((*aRefTo)->data());
 665             aRefData->addBackReference(aFeature, aRefsIter->first); // here the Concealed flag is updated
 666             // update enable/disable status: the nested status must be equal to the composite
 667             CompositeFeaturePtr aComp =
 668               std::dynamic_pointer_cast<ModelAPI_CompositeFeature>(aFeature);
 669             if (aComp.get()) {
 670               FeaturePtr aReferenced = std::dynamic_pointer_cast<ModelAPI_Feature>(*aRefTo);
 671               if (aReferenced.get()) {
 672                 aReferenced->setDisabled(aComp->isDisabled());
 673               }
 674             }
 675           }
 676         }
 677       }
 678     }
 679   }
 680   std::list<std::pair<ResultPtr, bool> >::iterator aCIter = aConcealed.begin();
 681   for(; aCIter != aConcealed.end(); aCIter++) {
 682     if (aCIter->first->isConcealed() != aCIter->second) { // somethign is changed => produce event
 683       if (aCIter->second) { // was concealed become not => creation event
 684         static Events_ID anEvent = Events_Loop::eventByName(EVENT_OBJECT_CREATED);
 685         ModelAPI_EventCreator::get()->sendUpdated(aCIter->first, anEvent);
 686       } else { // was not concealed become concealed => delete event
 687         ModelAPI_EventCreator::get()->sendDeleted(myDoc, aCIter->first->groupName());
 688         // redisplay for the viewer (it must be disappeared also)
 689         static Events_ID EVENT_DISP =
 690           Events_Loop::loop()->eventByName(EVENT_OBJECT_TO_REDISPLAY);
 691         ModelAPI_EventCreator::get()->sendUpdated(aCIter->first, EVENT_DISP);
 692       }
 693     }
 694   }
 695 }
 696
 697 TDF_Label Model_Objects::resultLabel(
 698   const std::shared_ptr<ModelAPI_Data>& theFeatureData, const int theResultIndex)
 699 {
 700   const std::shared_ptr<Model_Data>& aData =
 701     std::dynamic_pointer_cast<Model_Data>(theFeatureData);
 702   return aData->label().Father().FindChild(TAG_FEATURE_RESULTS).FindChild(theResultIndex + 1);
 703 }
 704
 705 void Model_Objects::storeResult(std::shared_ptr<ModelAPI_Data> theFeatureData,
 706                                  std::shared_ptr<ModelAPI_Result> theResult,
 707                                  const int theResultIndex)
 708 {
 709   theResult->setDoc(myDoc);
 710   initData(theResult, resultLabel(theFeatureData, theResultIndex), TAG_FEATURE_ARGUMENTS);
 711   if (theResult->data()->name().empty()) {  // if was not initialized, generate event and set a name
 712     std::stringstream aNewName;
 713     aNewName<<theFeatureData->name();
 714     if (theResultIndex > 0) // if there are several results, add unique prefix starting from second
 715       aNewName<<"_"<<theResultIndex + 1;
 716     theResult->data()->setName(aNewName.str());
 717   }
 718 }
 719
 720 std::shared_ptr<ModelAPI_ResultConstruction> Model_Objects::createConstruction(
 721     const std::shared_ptr<ModelAPI_Data>& theFeatureData, const int theIndex)
 722 {
 723   TDF_Label aLab = resultLabel(theFeatureData, theIndex);
 724   TDataStd_Comment::Set(aLab, ModelAPI_ResultConstruction::group().c_str());
 725   ObjectPtr anOldObject = object(aLab);
 726   std::shared_ptr<ModelAPI_ResultConstruction> aResult;
 727   if (anOldObject) {
 728     aResult = std::dynamic_pointer_cast<ModelAPI_ResultConstruction>(anOldObject);
 729   }
 730   if (!aResult) {
 731     aResult = std::shared_ptr<ModelAPI_ResultConstruction>(new Model_ResultConstruction);
 732     storeResult(theFeatureData, aResult, theIndex);
 733   }
 734   return aResult;
 735 }
 736
 737 std::shared_ptr<ModelAPI_ResultBody> Model_Objects::createBody(
 738     const std::shared_ptr<ModelAPI_Data>& theFeatureData, const int theIndex)
 739 {
 740   TDF_Label aLab = resultLabel(theFeatureData, theIndex);
 741   TDataStd_Comment::Set(aLab, ModelAPI_ResultBody::group().c_str());
 742   ObjectPtr anOldObject = object(aLab);
 743   std::shared_ptr<ModelAPI_ResultBody> aResult;
 744   if (anOldObject) {
 745     aResult = std::dynamic_pointer_cast<ModelAPI_ResultBody>(anOldObject);
 746   }
 747   if (!aResult) {
 748     aResult = std::shared_ptr<ModelAPI_ResultBody>(new Model_ResultBody);
 749     storeResult(theFeatureData, aResult, theIndex);
 750   }
 751   return aResult;
 752 }
 753
 754 std::shared_ptr<ModelAPI_ResultPart> Model_Objects::createPart(
 755     const std::shared_ptr<ModelAPI_Data>& theFeatureData, const int theIndex)
 756 {
 757   TDF_Label aLab = resultLabel(theFeatureData, theIndex);
 758   TDataStd_Comment::Set(aLab, ModelAPI_ResultPart::group().c_str());
 759   ObjectPtr anOldObject = object(aLab);
 760   std::shared_ptr<ModelAPI_ResultPart> aResult;
 761   if (anOldObject) {
 762     aResult = std::dynamic_pointer_cast<ModelAPI_ResultPart>(anOldObject);
 763   }
 764   if (!aResult) {
 765     aResult = std::shared_ptr<ModelAPI_ResultPart>(new Model_ResultPart);
 766     storeResult(theFeatureData, aResult, theIndex);
 767   }
 768   return aResult;
 769 }
 770
 771 std::shared_ptr<ModelAPI_ResultGroup> Model_Objects::createGroup(
 772     const std::shared_ptr<ModelAPI_Data>& theFeatureData, const int theIndex)
 773 {
 774   TDF_Label aLab = resultLabel(theFeatureData, theIndex);
 775   TDataStd_Comment::Set(aLab, ModelAPI_ResultGroup::group().c_str());
 776   ObjectPtr anOldObject = object(aLab);
 777   std::shared_ptr<ModelAPI_ResultGroup> aResult;
 778   if (anOldObject) {
 779     aResult = std::dynamic_pointer_cast<ModelAPI_ResultGroup>(anOldObject);
 780   }
 781   if (!aResult) {
 782     aResult = std::shared_ptr<ModelAPI_ResultGroup>(new Model_ResultGroup(theFeatureData));
 783     storeResult(theFeatureData, aResult, theIndex);
 784   }
 785   return aResult;
 786 }
 787
 788 std::shared_ptr<ModelAPI_ResultParameter> Model_Objects::createParameter(
 789       const std::shared_ptr<ModelAPI_Data>& theFeatureData, const int theIndex)
 790 {
 791   TDF_Label aLab = resultLabel(theFeatureData, theIndex);
 792   TDataStd_Comment::Set(aLab, ModelAPI_ResultParameter::group().c_str());
 793   ObjectPtr anOldObject = object(aLab);
 794   std::shared_ptr<ModelAPI_ResultParameter> aResult;
 795   if (anOldObject) {
 796     aResult = std::dynamic_pointer_cast<ModelAPI_ResultParameter>(anOldObject);
 797   }
 798   if (!aResult) {
 799     aResult = std::shared_ptr<ModelAPI_ResultParameter>(new Model_ResultParameter);
 800     storeResult(theFeatureData, aResult, theIndex);
 801   }
 802   return aResult;
 803 }
 804
 805 std::shared_ptr<ModelAPI_Feature> Model_Objects::feature(
 806     const std::shared_ptr<ModelAPI_Result>& theResult)
 807 {
 808   std::shared_ptr<Model_Data> aData = std::dynamic_pointer_cast<Model_Data>(theResult->data());
 809   if (aData) {
 810     TDF_Label aFeatureLab = aData->label().Father().Father().Father();
 811     return feature(aFeatureLab);
 812   }
 813   return FeaturePtr();
 814 }
 815
 816 std::string Model_Objects::featureResultGroup(FeaturePtr theFeature)
 817 {
 818   if (theFeature->data()->isValid()) {
 819     TDF_ChildIterator aLabIter(resultLabel(theFeature->data(), 0).Father());
 820     if (aLabIter.More()) {
 821       TDF_Label anArgLab = aLabIter.Value();
 822       Handle(TDataStd_Comment) aGroup;
 823       if (aLabIter.Value().FindAttribute(TDataStd_Comment::GetID(), aGroup)) {
 824         return TCollection_AsciiString(aGroup->Get()).ToCString();
 825       }
 826     }
 827   }
 828   static std::string anEmpty;
 829   return anEmpty; // not found
 830 }
 831
 832 void Model_Objects::updateResults(FeaturePtr theFeature)
 833 {
 834   // for not persistent is will be done by parametric updater automatically
 835   //if (!theFeature->isPersistentResult()) return;
 836   // check the existing results and remove them if there is nothing on the label
 837   std::list<ResultPtr>::const_iterator aResIter = theFeature->results().cbegin();
 838   while(aResIter != theFeature->results().cend()) {
 839     ResultPtr aBody = std::dynamic_pointer_cast<ModelAPI_Result>(*aResIter);
 840     if (aBody.get()) {
 841       if (!aBody->data()->isValid()) {
 842         // found a disappeared result => remove it
 843         theFeature->eraseResultFromList(aBody);
 844         // start iterate from beginning because iterator is corrupted by removing
 845         aResIter = theFeature->results().cbegin();
 846         continue;
 847       }
 848     }
 849     aResIter++;
 850   }
 851   // it may be on undo
 852   if (!theFeature->data() || !theFeature->data()->isValid() || theFeature->isDisabled())
 853     return;
 854   // check that results are presented on all labels
 855   int aResSize = theFeature->results().size();
 856   TDF_ChildIterator aLabIter(resultLabel(theFeature->data(), 0).Father());
 857   for(; aLabIter.More(); aLabIter.Next()) {
 858     // here must be GUID of the feature
 859     int aResIndex = aLabIter.Value().Tag() - 1;
 860     ResultPtr aNewBody;
 861     if (aResSize <= aResIndex) {
 862       TDF_Label anArgLab = aLabIter.Value();
 863       Handle(TDataStd_Comment) aGroup;
 864       if (anArgLab.FindAttribute(TDataStd_Comment::GetID(), aGroup)) {
 865         if (aGroup->Get() == ModelAPI_ResultBody::group().c_str()) {
 866           aNewBody = createBody(theFeature->data(), aResIndex);
 867         } else if (aGroup->Get() == ModelAPI_ResultPart::group().c_str()) {
 868           std::shared_ptr<ModelAPI_ResultPart> aNewP = createPart(theFeature->data(), aResIndex);
 869           theFeature->setResult(aNewP, aResIndex);
 870           if (!aNewP->partDoc().get())
 871             theFeature->execute(); // create the part result: it is better to restore the previous result if it is possible
 872           break;
 873         } else if (aGroup->Get() == ModelAPI_ResultConstruction::group().c_str()) {
 874           theFeature->execute(); // construction shapes are needed for sketch solver
 875           break;
 876         } else if (aGroup->Get() == ModelAPI_ResultGroup::group().c_str()) {
 877           aNewBody = createGroup(theFeature->data(), aResIndex);
 878         } else if (aGroup->Get() == ModelAPI_ResultParameter::group().c_str()) {
 879           theFeature->attributeChanged("expression"); // just produce a value
 880           break;
 881         } else {
 882           Events_Error::send(std::string("Unknown type of result is found in the document:") +
 883             TCollection_AsciiString(aGroup->Get()).ToCString());
 884         }
 885       }
 886       if (aNewBody) {
 887         theFeature->setResult(aNewBody, aResIndex);
 888       }
 889     }
 890   }
 891 }
 892
 893 ResultPtr Model_Objects::findByName(const std::string theName)
 894 {
 895   NCollection_DataMap<TDF_Label, FeaturePtr>::Iterator anObjIter(myFeatures);
 896   for(; anObjIter.More(); anObjIter.Next()) {
 897     FeaturePtr& aFeature = anObjIter.ChangeValue();
 898     if (!aFeature.get() || aFeature->isDisabled()) // may be on close
 899       continue;
 900     const std::list<std::shared_ptr<ModelAPI_Result> >& aResults = aFeature->results();
 901     std::list<std::shared_ptr<ModelAPI_Result> >::const_iterator aRIter = aResults.begin();
 902     for (; aRIter != aResults.cend(); aRIter++) {
 903       ResultPtr aRes = *aRIter;
 904       if (aRes.get() && aRes->data() && aRes->data()->isValid() && !aRes->isDisabled() &&
 905           aRes->data()->name() == theName) {
 906         return aRes;
 907       }
 908     }
 909   }
 910   // not found
 911   return ResultPtr();
 912 }
 913
 914 FeaturePtr Model_Objects::nextFeature(FeaturePtr theCurrent, const bool theReverse)
 915 {
 916   std::shared_ptr<Model_Data> aData = std::static_pointer_cast<Model_Data>(theCurrent->data());
 917   if (aData && aData->isValid()) {
 918     TDF_Label aFeatureLabel = aData->label().Father();
 919     Handle(TDataStd_ReferenceArray) aRefs;
 920     if (featuresLabel().FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs)) {
 921       for(int a = aRefs->Lower(); a <= aRefs->Upper(); a++) { // iterate all existing features
 922         if (aRefs->Value(a).IsEqual(aFeatureLabel)) {
 923           a += theReverse ? -1 : 1;
 924           if (a >= aRefs->Lower() && a <= aRefs->Upper())
 925             return feature(aRefs->Value(a));
 926           break; // finish iiteration: it's last feature
 927         }
 928       }
 929     }
 930   }
 931   return FeaturePtr(); // not found, last, or something is wrong
 932 }
 933
 934 FeaturePtr Model_Objects::firstFeature()
 935 {
 936   Handle(TDataStd_ReferenceArray) aRefs;
 937   if (featuresLabel().FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs)) {
 938     return feature(aRefs->Value(aRefs->Lower()));
 939   }
 940   return FeaturePtr(); // no features at all
 941 }
 942
 943 FeaturePtr Model_Objects::lastFeature()
 944 {
 945   Handle(TDataStd_ReferenceArray) aRefs;
 946   if (featuresLabel().FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs)) {
 947     return feature(aRefs->Value(aRefs->Upper()));
 948   }
 949   return FeaturePtr(); // no features at all
 950 }
 951
 952 std::list<std::shared_ptr<ModelAPI_Feature> > Model_Objects::allFeatures()
 953 {
 954   std::list<std::shared_ptr<ModelAPI_Feature> > aResult;
 955   Handle(TDataStd_ReferenceArray) aRefs;
 956   if (featuresLabel().FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs)) {
 957     for(int a = aRefs->Lower(); a <= aRefs->Upper(); a++) {
 958       FeaturePtr aFeature = feature(aRefs->Value(a));
 959       if (aFeature.get())
 960         aResult.push_back(aFeature);
 961     }
 962   }
 963   return aResult;
 964 }
 965
 966 int Model_Objects::numInternalFeatures()
 967 {
 968   Handle(TDataStd_ReferenceArray) aRefs;
 969   if (featuresLabel().FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs)) {
 970     return aRefs->Upper() - aRefs->Lower() + 1;
 971   }
 972   return 0; // invalid
 973 }
 974
 975 std::shared_ptr<ModelAPI_Feature> Model_Objects::internalFeature(const int theIndex)
 976 {
 977   Handle(TDataStd_ReferenceArray) aRefs;
 978   if (featuresLabel().FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs)) {
 979     return feature(aRefs->Value(aRefs->Lower() + theIndex));
 980   }
 981   return FeaturePtr(); // invalid
 982 }
 983
 984 Standard_Integer HashCode(const TDF_Label& theLab, const Standard_Integer theUpper)
 985 {
 986   return TDF_LabelMapHasher::HashCode(theLab, theUpper);
 987
 988 }
 989 Standard_Boolean IsEqual(const TDF_Label& theLab1, const TDF_Label& theLab2)
 990 {
 991   return TDF_LabelMapHasher::IsEqual(theLab1, theLab2);
 992 }