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 #include <ModelAPI_Tools.h>
  20
  21 #include <Events_Loop.h>
  22 #include <Events_Error.h>
  23
  24 #include <TDataStd_Integer.hxx>
  25 #include <TDataStd_Comment.hxx>
  26 #include <TDF_ChildIDIterator.hxx>
  27 #include <TDataStd_ReferenceArray.hxx>
  28 #include <TDataStd_HLabelArray1.hxx>
  29 #include <TDataStd_Name.hxx>
  30 #include <TDF_Reference.hxx>
  31 #include <TDF_ChildIDIterator.hxx>
  32 #include <TDF_LabelMapHasher.hxx>
  33
  34 static const int TAG_OBJECTS = 2;  // tag of the objects sub-tree (features, results)
  35
  36 // feature sub-labels
  37 static const int TAG_FEATURE_ARGUMENTS = 1;  ///< where the arguments are located
  38 static const int TAG_FEATURE_RESULTS = 2;  ///< where the results are located
  39
  40 ///
  41 /// 0:1:2 - where features are located
  42 /// 0:1:2:N:1 - data of the feature N
  43 /// 0:1:2:N:2:K:1 - data of the K result of the feature N
  44
  45 Model_Objects::Model_Objects(TDF_Label theMainLab) : myMain(theMainLab)
  46 {
  47 }
  48
  49 void Model_Objects::setOwner(DocumentPtr theDoc)
  50 {
  51   myDoc = theDoc;
  52   // update all fields and recreate features and result objects if needed
  53   synchronizeFeatures(false, true, true);
  54   myHistory.clear();
  55 }
  56
  57 Model_Objects::~Model_Objects()
  58 {
  59   // delete all features of this document
  60   Events_Loop* aLoop = Events_Loop::loop();
  61   NCollection_DataMap<TDF_Label, FeaturePtr>::Iterator aFeaturesIter(myFeatures);
  62   for(; aFeaturesIter.More(); aFeaturesIter.Next()) {
  63     FeaturePtr aFeature = aFeaturesIter.Value();
  64     static Events_ID EVENT_DISP = aLoop->eventByName(EVENT_OBJECT_TO_REDISPLAY);
  65     ModelAPI_EventCreator::get()->sendDeleted(myDoc, ModelAPI_Feature::group());
  66     ModelAPI_EventCreator::get()->sendUpdated(aFeature, EVENT_DISP);
  67     aFeature->eraseResults();
  68     aFeature->erase();
  69   }
  70   myFeatures.Clear();
  71   aLoop->flush(Events_Loop::eventByName(EVENT_OBJECT_DELETED));
  72   aLoop->flush(Events_Loop::eventByName(EVENT_OBJECT_TO_REDISPLAY));
  73
  74 }
  75
  76 /// Appends to the array of references a new referenced label
  77 static void AddToRefArray(TDF_Label& theArrayLab, TDF_Label& theReferenced, TDF_Label& thePrevLab)
  78 {
  79   Handle(TDataStd_ReferenceArray) aRefs;
  80   if (!theArrayLab.FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs)) {
  81     aRefs = TDataStd_ReferenceArray::Set(theArrayLab, 0, 0);
  82     aRefs->SetValue(0, theReferenced);
  83   } else {  // extend array by one more element
  84     Handle(TDataStd_HLabelArray1) aNewArray = new TDataStd_HLabelArray1(aRefs->Lower(),
  85                                                                         aRefs->Upper() + 1);
  86     int aPassedPrev = 0; // prev feature is found and passed
  87     if (thePrevLab.IsNull()) { // null means that inserted feature must be the first
  88       aNewArray->SetValue(aRefs->Lower(), theReferenced);
  89       aPassedPrev = 1;
  90     }
  91     for (int a = aRefs->Lower(); a <= aRefs->Upper(); a++) {
  92       aNewArray->SetValue(a + aPassedPrev, aRefs->Value(a));
  93       if (!aPassedPrev && aRefs->Value(a).IsEqual(thePrevLab)) {
  94         aPassedPrev = 1;
  95         aNewArray->SetValue(a + 1, theReferenced);
  96       }
  97     }
  98     if (!aPassedPrev) // not found: unknown situation
  99       aNewArray->SetValue(aRefs->Upper() + 1, theReferenced);
 100     aRefs->SetInternalArray(aNewArray);
 101   }
 102 }
 103
 104 void Model_Objects::addFeature(FeaturePtr theFeature, const FeaturePtr theAfterThis)
 105 {
 106   if (!theFeature->isAction()) {  // do not add action to the data model
 107     TDF_Label aFeaturesLab = featuresLabel();
 108     TDF_Label aFeatureLab = aFeaturesLab.NewChild();
 109     // store feature in the features array: before "initData" because in macro features
 110     // in initData it creates new features, appeared later than this
 111     TDF_Label aPrevFeateureLab;
 112     if (theAfterThis.get()) { // searching for the previous feature label
 113       std::shared_ptr<Model_Data> aPrevData =
 114         std::dynamic_pointer_cast<Model_Data>(theAfterThis->data());
 115       if (aPrevData.get()) {
 116         aPrevFeateureLab = aPrevData->label().Father();
 117       }
 118     }
 119     AddToRefArray(aFeaturesLab, aFeatureLab, aPrevFeateureLab);
 120
 121     initData(theFeature, aFeatureLab, TAG_FEATURE_ARGUMENTS);
 122     // keep the feature ID to restore document later correctly
 123     TDataStd_Comment::Set(aFeatureLab, theFeature->getKind().c_str());
 124     myFeatures.Bind(aFeatureLab, theFeature);
 125     // event: feature is added
 126     static Events_ID anEvent = Events_Loop::eventByName(EVENT_OBJECT_CREATED);
 127     ModelAPI_EventCreator::get()->sendUpdated(theFeature, anEvent);
 128     theFeature->setDisabled(false); // by default created feature is enabled
 129     updateHistory(ModelAPI_Feature::group());
 130   } else { // make feature has not-null data anyway
 131     theFeature->setData(Model_Data::invalidData());
 132     theFeature->setDoc(myDoc);
 133   }
 134 }
 135
 136 /// Appends to the array of references a new referenced label.
 137 /// If theIndex is not -1, removes element at this index, not theReferenced.
 138 /// \returns the index of removed element
 139 static int RemoveFromRefArray(TDF_Label theArrayLab, TDF_Label theReferenced,
 140   const int theIndex = -1)
 141 {
 142   int aResult = -1;  // no returned
 143   Handle(TDataStd_ReferenceArray) aRefs;
 144   if (theArrayLab.FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs)) {
 145     if (aRefs->Length() == 1) {  // just erase an array
 146       if ((theIndex == -1 && aRefs->Value(0) == theReferenced) || theIndex == 0) {
 147         theArrayLab.ForgetAttribute(TDataStd_ReferenceArray::GetID());
 148       }
 149       aResult = 0;
 150     } else {  // reduce the array
 151       Handle(TDataStd_HLabelArray1) aNewArray = new TDataStd_HLabelArray1(aRefs->Lower(),
 152                                                                           aRefs->Upper() - 1);
 153       int aCount = aRefs->Lower();
 154       for (int a = aCount; a <= aRefs->Upper(); a++, aCount++) {
 155         if ((theIndex == -1 && aRefs->Value(a) == theReferenced) || theIndex == a) {
 156           aCount--;
 157           aResult = a;
 158         } else {
 159           aNewArray->SetValue(aCount, aRefs->Value(a));
 160         }
 161       }
 162       aRefs->SetInternalArray(aNewArray);
 163     }
 164   }
 165   return aResult;
 166 }
 167
 168 void Model_Objects::refsToFeature(FeaturePtr theFeature,
 169   std::set<std::shared_ptr<ModelAPI_Feature> >& theRefs, const bool isSendError)
 170 {
 171   // check the feature: it must have no depended objects on it
 172   // the dependencies can be in the feature results
 173   std::list<ResultPtr>::const_iterator aResIter = theFeature->results().cbegin();
 174   for(; aResIter != theFeature->results().cend(); aResIter++) {
 175     ResultPtr aResult = (*aResIter);
 176     std::shared_ptr<Model_Data> aData =
 177       std::dynamic_pointer_cast<Model_Data>(aResult->data());
 178     if (aData.get() != NULL) {
 179       const std::set<AttributePtr>& aRefs = aData->refsToMe();
 180       std::set<AttributePtr>::const_iterator aRefIt = aRefs.begin(), aRefLast = aRefs.end();
 181       for(; aRefIt != aRefLast; aRefIt++) {
 182         FeaturePtr aFeature = std::dynamic_pointer_cast<ModelAPI_Feature>((*aRefIt)->owner());
 183         if (aFeature.get() != NULL)
 184           theRefs.insert(aFeature);
 185       }
 186     }
 187   }
 188   // the dependencies can be in the feature itself
 189   std::shared_ptr<Model_Data> aData =
 190       std::dynamic_pointer_cast<Model_Data>(theFeature->data());
 191   if (aData && !aData->refsToMe().empty()) {
 192     const std::set<AttributePtr>& aRefs = aData->refsToMe();
 193     std::set<AttributePtr>::const_iterator aRefIt = aRefs.begin(), aRefLast = aRefs.end();
 194     for(; aRefIt != aRefLast; aRefIt++) {
 195       FeaturePtr aFeature = std::dynamic_pointer_cast<ModelAPI_Feature>((*aRefIt)->owner());
 196       if (aFeature.get() != NULL)
 197         theRefs.insert(aFeature);
 198     }
 199   }
 200
 201   if (!theRefs.empty() && isSendError) {
 202     Events_Error::send(
 203       "Feature '" + theFeature->data()->name() + "' is used and can not be deleted");
 204   }
 205 }
 206
 207 void Model_Objects::removeFeature(FeaturePtr theFeature)
 208 {
 209   std::shared_ptr<Model_Data> aData = std::static_pointer_cast<Model_Data>(theFeature->data());
 210   if (aData && aData->isValid()) {
 211     // checking that the sub-element of composite feature is removed: if yes, inform the owner
 212     std::set<std::shared_ptr<ModelAPI_Feature> > aRefs;
 213     refsToFeature(theFeature, aRefs, false);
 214     std::set<std::shared_ptr<ModelAPI_Feature> >::iterator aRefIter = aRefs.begin();
 215     for(; aRefIter != aRefs.end(); aRefIter++) {
 216       std::shared_ptr<ModelAPI_CompositeFeature> aComposite =
 217         std::dynamic_pointer_cast<ModelAPI_CompositeFeature>(*aRefIter);
 218       if (aComposite.get()) {
 219         aComposite->removeFeature(theFeature);
 220       }
 221     }
 222     // this must be before erase since theFeature erasing removes all information about
 223     // the feature results and groups of results
 224     // To reproduce: create sketch, extrusion, remove sketch => constructions tree is not updated
 225     clearHistory(theFeature);
 226     // erase fields
 227     theFeature->erase();
 228
 229     TDF_Label aFeatureLabel = aData->label().Father();
 230     if (myFeatures.IsBound(aFeatureLabel))
 231       myFeatures.UnBind(aFeatureLabel);
 232
 233     static Events_ID EVENT_DISP = Events_Loop::loop()->eventByName(EVENT_OBJECT_TO_REDISPLAY);
 234     ModelAPI_EventCreator::get()->sendUpdated(theFeature, EVENT_DISP);
 235     // erase all attributes under the label of feature
 236     aFeatureLabel.ForgetAllAttributes();
 237     // remove it from the references array
 238     RemoveFromRefArray(featuresLabel(), aFeatureLabel);
 239     // event: feature is deleted
 240     ModelAPI_EventCreator::get()->sendDeleted(theFeature->document(), ModelAPI_Feature::group());
 241     // the redisplay signal should be flushed in order to erase the feature presentation in the viewer
 242     Events_Loop::loop()->flush(EVENT_DISP);
 243     updateHistory(ModelAPI_Feature::group());
 244   }
 245 }
 246
 247 void Model_Objects::moveFeature(FeaturePtr theMoved, FeaturePtr theAfterThis)
 248 {
 249   TDF_Label aFeaturesLab = featuresLabel();
 250   Handle(TDataStd_ReferenceArray) aRefs;
 251   if (!aFeaturesLab.FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs))
 252     return;
 253   TDF_Label anAfterLab, aMovedLab =
 254     std::dynamic_pointer_cast<Model_Data>(theMoved->data())->label().Father();
 255   if (theAfterThis.get())
 256     anAfterLab = std::dynamic_pointer_cast<Model_Data>(theAfterThis->data())->label().Father();
 257
 258   Handle(TDataStd_HLabelArray1) aNewArray =
 259     new TDataStd_HLabelArray1(aRefs->Lower(), aRefs->Upper());
 260   int aPassedMovedFrom = 0; // the prev feature location is found and passed
 261   int aPassedMovedTo = 0; // the feature is added and this location is passed
 262   if (!theAfterThis.get()) { // null means that inserted feature must be the first
 263     aNewArray->SetValue(aRefs->Lower(), aMovedLab);
 264     aPassedMovedTo = 1;
 265   }
 266   for (int a = aRefs->Lower(); a <= aRefs->Upper(); a++) {
 267     if (aPassedMovedTo == 0 && aRefs->Value(a) == anAfterLab) { // add two
 268       aPassedMovedTo++;
 269       aNewArray->SetValue(a - aPassedMovedFrom, anAfterLab);
 270       if (a + 1 - aPassedMovedFrom <= aRefs->Upper())
 271         aNewArray->SetValue(a + 1 - aPassedMovedFrom, aMovedLab);
 272     } else if (aPassedMovedFrom == 0 && aRefs->Value(a) == aMovedLab) { // skip
 273       aPassedMovedFrom++;
 274     } else { // just copy one
 275       if (a - aPassedMovedFrom + aPassedMovedTo <= aRefs->Upper())
 276         aNewArray->SetValue(a - aPassedMovedFrom + aPassedMovedTo, aRefs->Value(a));
 277     }
 278   }
 279   if (!aPassedMovedFrom || !aPassedMovedTo) {// not found: unknown situation
 280     if (!aPassedMovedFrom) {
 281       static std::string aMovedFromError("The moved feature is not found");
 282       Events_Error::send(aMovedFromError);
 283     } else {
 284       static std::string aMovedToError("The 'after' feature for movement is not found");
 285       Events_Error::send(aMovedToError);
 286     }
 287     return;
 288   }
 289   // store the new array
 290   aRefs->SetInternalArray(aNewArray);
 291   // update the feature and the history
 292   clearHistory(theMoved);
 293   static Events_ID EVENT_UPD = Events_Loop::loop()->eventByName(EVENT_OBJECT_UPDATED);
 294   ModelAPI_EventCreator::get()->sendUpdated(theMoved, EVENT_UPD);
 295 }
 296
 297 void Model_Objects::clearHistory(ObjectPtr theObj)
 298 {
 299   if (theObj) {
 300     const std::string aGroup = theObj->groupName();
 301     std::map<std::string, std::vector<ObjectPtr> >::iterator aHIter = myHistory.find(aGroup);
 302     if (aHIter != myHistory.end())
 303       myHistory.erase(aHIter); // erase from map => this means that it is not synchronized
 304     if (theObj->groupName() == ModelAPI_Feature::group()) { // clear results group of the feature
 305       FeaturePtr aFeature = std::dynamic_pointer_cast<ModelAPI_Feature>(theObj);
 306       std::string aResultGroup = featureResultGroup(aFeature);
 307       if (!aResultGroup.empty()) {
 308         std::map<std::string, std::vector<ObjectPtr> >::iterator aHIter =
 309           myHistory.find(aResultGroup);
 310         if (aHIter != myHistory.end())
 311           myHistory.erase(aHIter); // erase from map => this means that it is not synchronized
 312       }
 313     }
 314   }
 315 }
 316
 317 void Model_Objects::createHistory(const std::string& theGroupID)
 318 {
 319   std::map<std::string, std::vector<ObjectPtr> >::iterator aHIter = myHistory.find(theGroupID);
 320   if (aHIter == myHistory.end()) {
 321     myHistory[theGroupID] = std::vector<ObjectPtr>();
 322     std::vector<ObjectPtr>& aResult = myHistory[theGroupID];
 323     // iterate the array of references and get feature by feature from the array
 324     bool isFeature = theGroupID == ModelAPI_Feature::group();
 325     Handle(TDataStd_ReferenceArray) aRefs;
 326     if (featuresLabel().FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs)) {
 327       for(int a = aRefs->Lower(); a <= aRefs->Upper(); a++) {
 328         FeaturePtr aFeature = feature(aRefs->Value(a));
 329         if (aFeature.get()) {
 330           // if feature is in sub-component, remove it from history: it is in sub-tree of sub-component
 331           if (!ModelAPI_Tools::compositeOwner(aFeature).get()) {
 332             if (isFeature) { // here may be also disabled features
 333               if (aFeature->isInHistory()) {
 334                 aResult.push_back(aFeature);
 335               }
 336             } else if (!aFeature->isDisabled()) { // iterate all results of not-disabled feature
 337               const std::list<std::shared_ptr<ModelAPI_Result> >& aResults = aFeature->results();
 338               std::list<std::shared_ptr<ModelAPI_Result> >::const_iterator aRIter = aResults.begin();
 339               for (; aRIter != aResults.cend(); aRIter++) {
 340                 ResultPtr aRes = *aRIter;
 341                 if (aRes->groupName() != theGroupID) break; // feature have only same group results
 342                 if (!aRes->isDisabled() && aRes->isInHistory() && !aRes->isConcealed()) {
 343                   aResult.push_back(*aRIter);
 344                 }
 345               }
 346             }
 347           }
 348         }
 349       }
 350     }
 351   }
 352 }
 353
 354 void Model_Objects::updateHistory(const std::shared_ptr<ModelAPI_Object> theObject)
 355 {
 356   clearHistory(theObject);
 357 }
 358
 359 void Model_Objects::updateHistory(const std::string theGroup)
 360 {
 361   std::map<std::string, std::vector<ObjectPtr> >::iterator aHIter = myHistory.find(theGroup);
 362   if (aHIter != myHistory.end())
 363     myHistory.erase(aHIter); // erase from map => this means that it is not synchronized
 364 }
 365
 366 FeaturePtr Model_Objects::feature(TDF_Label theLabel) const
 367 {
 368   if (myFeatures.IsBound(theLabel))
 369     return myFeatures.Find(theLabel);
 370   return FeaturePtr();  // not found
 371 }
 372
 373 ObjectPtr Model_Objects::object(TDF_Label theLabel)
 374 {
 375   // try feature by label
 376   FeaturePtr aFeature = feature(theLabel);
 377   if (aFeature)
 378     return feature(theLabel);
 379   TDF_Label aFeatureLabel = theLabel.Father().Father();  // let's suppose it is result
 380   aFeature = feature(aFeatureLabel);
 381   if (aFeature) {
 382     const std::list<std::shared_ptr<ModelAPI_Result> >& aResults = aFeature->results();
 383     std::list<std::shared_ptr<ModelAPI_Result> >::const_iterator aRIter = aResults.cbegin();
 384     for (; aRIter != aResults.cend(); aRIter++) {
 385       std::shared_ptr<Model_Data> aResData = std::dynamic_pointer_cast<Model_Data>(
 386           (*aRIter)->data());
 387       if (aResData->label().Father().IsEqual(theLabel))
 388         return *aRIter;
 389     }
 390   }
 391   return FeaturePtr();  // not found
 392 }
 393
 394 ObjectPtr Model_Objects::object(const std::string& theGroupID, const int theIndex)
 395 {
 396   if (theIndex == -1)
 397     return ObjectPtr();
 398   createHistory(theGroupID);
 399   return myHistory[theGroupID][theIndex];
 400 }
 401
 402 std::shared_ptr<ModelAPI_Object> Model_Objects::objectByName(
 403     const std::string& theGroupID, const std::string& theName)
 404 {
 405   createHistory(theGroupID);
 406   std::vector<ObjectPtr>& allObjs = myHistory[theGroupID];
 407   std::vector<ObjectPtr>::iterator anObjIter = allObjs.begin();
 408   for(; anObjIter != allObjs.end(); anObjIter++) {
 409     if ((*anObjIter)->data()->name() == theName)
 410       return *anObjIter;
 411   }
 412   // not found
 413   return ObjectPtr();
 414 }
 415
 416 const int Model_Objects::index(std::shared_ptr<ModelAPI_Object> theObject)
 417 {
 418   std::string aGroup = theObject->groupName();
 419   createHistory(aGroup);
 420   std::vector<ObjectPtr>& allObjs = myHistory[aGroup];
 421   std::vector<ObjectPtr>::iterator anObjIter = allObjs.begin(); // iterate to search object
 422   for(int anIndex = 0; anObjIter != allObjs.end(); anObjIter++, anIndex++) {
 423     if ((*anObjIter) == theObject)
 424       return anIndex;
 425   }
 426   // not found
 427   return -1;
 428 }
 429
 430 int Model_Objects::size(const std::string& theGroupID)
 431 {
 432   createHistory(theGroupID);
 433   return myHistory[theGroupID].size();
 434 }
 435
 436 void Model_Objects::allResults(const std::string& theGroupID, std::list<ResultPtr>& theResults)
 437 {
 438   // iterate the array of references and get feature by feature from the array
 439   Handle(TDataStd_ReferenceArray) aRefs;
 440   if (featuresLabel().FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs)) {
 441     for(int a = aRefs->Lower(); a <= aRefs->Upper(); a++) {
 442       FeaturePtr aFeature = feature(aRefs->Value(a));
 443       if (aFeature.get()) {
 444         const std::list<std::shared_ptr<ModelAPI_Result> >& aResults = aFeature->results();
 445         std::list<std::shared_ptr<ModelAPI_Result> >::const_iterator aRIter = aResults.begin();
 446         for (; aRIter != aResults.cend(); aRIter++) {
 447           ResultPtr aRes = *aRIter;
 448           if (aRes->groupName() != theGroupID) break; // feature have only same group results
 449           if (aRes->isInHistory() && !aRes->isConcealed()) {
 450             theResults.push_back(*aRIter);
 451           }
 452         }
 453       }
 454     }
 455   }
 456 }
 457
 458
 459 TDF_Label Model_Objects::featuresLabel() const
 460 {
 461   return myMain.FindChild(TAG_OBJECTS);
 462 }
 463
 464 void Model_Objects::setUniqueName(FeaturePtr theFeature)
 465 {
 466   if (!theFeature->data()->name().empty())
 467     return;  // not needed, name is already defined
 468   std::string aName;  // result
 469   // first count all features of such kind to start with index = count + 1
 470   int aNumObjects = 0;
 471   NCollection_DataMap<TDF_Label, FeaturePtr>::Iterator aFIter(myFeatures);
 472   for (; aFIter.More(); aFIter.Next()) {
 473     if (aFIter.Value()->getKind() == theFeature->getKind())
 474       aNumObjects++;
 475   }
 476   // generate candidate name
 477   std::stringstream aNameStream;
 478   aNameStream << theFeature->getKind() << "_" << aNumObjects + 1;
 479   aName = aNameStream.str();
 480   // check this is unique, if not, increase index by 1
 481   for (aFIter.Initialize(myFeatures); aFIter.More();) {
 482     FeaturePtr aFeature = aFIter.Value();
 483     bool isSameName = aFeature->data()->name() == aName;
 484     if (!isSameName) {  // check also results to avoid same results names (actual for Parts)
 485       const std::list<std::shared_ptr<ModelAPI_Result> >& aResults = aFeature->results();
 486       std::list<std::shared_ptr<ModelAPI_Result> >::const_iterator aRIter = aResults.begin();
 487       for (; aRIter != aResults.cend(); aRIter++) {
 488         isSameName = (*aRIter)->data()->name() == aName;
 489       }
 490     }
 491     if (isSameName) {
 492       aNumObjects++;
 493       std::stringstream aNameStream;
 494       aNameStream << theFeature->getKind() << "_" << aNumObjects + 1;
 495       aName = aNameStream.str();
 496       // reinitialize iterator to make sure a new name is unique
 497       aFIter.Initialize(myFeatures);
 498     } else
 499       aFIter.Next();
 500   }
 501   theFeature->data()->setName(aName);
 502 }
 503
 504 void Model_Objects::initData(ObjectPtr theObj, TDF_Label theLab, const int theTag)
 505 {
 506   std::shared_ptr<Model_Data> aData(new Model_Data);
 507   aData->setLabel(theLab.FindChild(theTag));
 508   aData->setObject(theObj);
 509   theObj->setDoc(myDoc);
 510   theObj->setData(aData);
 511   FeaturePtr aFeature = std::dynamic_pointer_cast<ModelAPI_Feature>(theObj);
 512   if (aFeature) {
 513     setUniqueName(aFeature);  // must be before "initAttributes" because duplicate part uses name
 514   }
 515   theObj->initAttributes();
 516 }
 517
 518 void Model_Objects::synchronizeFeatures(
 519   const bool theMarkUpdated, const bool theUpdateReferences, const bool theFlush)
 520 {
 521   Model_Document* anOwner = std::dynamic_pointer_cast<Model_Document>(myDoc).get();
 522   if (!anOwner) // this may happen on creation of document: nothing there, so nothing to synchronize
 523     return;
 524   // after all updates, sends a message that groups of features were created or updated
 525   Events_Loop* aLoop = Events_Loop::loop();
 526   static Events_ID aDispEvent = aLoop->eventByName(EVENT_OBJECT_TO_REDISPLAY);
 527   static Events_ID aCreateEvent = Events_Loop::eventByName(EVENT_OBJECT_CREATED);
 528   static Events_ID anUpdateEvent = Events_Loop::eventByName(EVENT_OBJECT_UPDATED);
 529   static Events_ID aRedispEvent = aLoop->eventByName(EVENT_OBJECT_TO_REDISPLAY);
 530   static Events_ID aDeleteEvent = Events_Loop::eventByName(EVENT_OBJECT_DELETED);
 531   static Events_ID aToHideEvent = aLoop->eventByName(EVENT_OBJECT_TO_REDISPLAY);
 532   bool isActive = aLoop->activateFlushes(false);
 533
 534   // update all objects by checking are they on labels or not
 535   std::set<FeaturePtr> aNewFeatures, aKeptFeatures;
 536   TDF_ChildIDIterator aLabIter(featuresLabel(), TDataStd_Comment::GetID());
 537   for (; aLabIter.More(); aLabIter.Next()) {
 538     TDF_Label aFeatureLabel = aLabIter.Value()->Label();
 539     FeaturePtr aFeature;
 540     if (!myFeatures.IsBound(aFeatureLabel)) {  // a new feature is inserted
 541       // create a feature
 542       aFeature = std::dynamic_pointer_cast<Model_Session>(ModelAPI_Session::get())->createFeature(
 543         TCollection_AsciiString(Handle(TDataStd_Comment)::DownCast(aLabIter.Value())->Get())
 544         .ToCString(), anOwner);
 545       if (!aFeature) {  // somethig is wrong, most probably, the opened document has invalid structure
 546         Events_Error::send("Invalid type of object in the document");
 547         aLabIter.Value()->Label().ForgetAllAttributes();
 548         continue;
 549       }
 550       // this must be before "setData" to redo the sketch line correctly
 551       myFeatures.Bind(aFeatureLabel, aFeature);
 552       aNewFeatures.insert(aFeature);
 553       initData(aFeature, aFeatureLabel, TAG_FEATURE_ARGUMENTS);
 554       updateHistory(aFeature);
 555       aFeature->setDisabled(false); // by default created feature is enabled (this allows to recreate the results before "setCurrent" is called)
 556
 557       // event: model is updated
 558       ModelAPI_EventCreator::get()->sendUpdated(aFeature, aCreateEvent);
 559     } else {  // nothing is changed, both iterators are incremented
 560       aFeature = myFeatures.Find(aFeatureLabel);
 561       aKeptFeatures.insert(aFeature);
 562       if (theMarkUpdated) {
 563         ModelAPI_EventCreator::get()->sendUpdated(aFeature, anUpdateEvent);
 564       }
 565     }
 566   }
 567
 568   // check all features are checked: if not => it was removed
 569   NCollection_DataMap<TDF_Label, FeaturePtr>::Iterator aFIter(myFeatures);
 570   while (aFIter.More()) {
 571     if (aKeptFeatures.find(aFIter.Value()) == aKeptFeatures.end()
 572       && aNewFeatures.find(aFIter.Value()) == aNewFeatures.end()) {
 573         FeaturePtr aFeature = aFIter.Value();
 574         // event: model is updated
 575         //if (aFeature->isInHistory()) {
 576         ModelAPI_EventCreator::get()->sendDeleted(myDoc, ModelAPI_Feature::group());
 577         //}
 578         // results of this feature must be redisplayed (hided)
 579         // redisplay also removed feature (used for sketch and AISObject)
 580         ModelAPI_EventCreator::get()->sendUpdated(aFeature, aRedispEvent);
 581         updateHistory(aFeature);
 582         aFeature->erase();
 583         // unbind after the "erase" call: on abort sketch is removes sub-objects that corrupts aFIter
 584         myFeatures.UnBind(aFIter.Key());
 585         // reinitialize iterator because unbind may corrupt the previous order in the map
 586         aFIter.Initialize(myFeatures);
 587     } else
 588       aFIter.Next();
 589   }
 590
 591   if (theUpdateReferences) {
 592     synchronizeBackRefs();
 593   }
 594   // update results of the features (after features created because they may be connected, like sketch and sub elements)
 595   // After synchronisation of back references because sketch must be set in sub-elements before "execute" by updateResults
 596   std::list<FeaturePtr> aComposites; // composites must be updated after their subs (issue 360)
 597   TDF_ChildIDIterator aLabIter2(featuresLabel(), TDataStd_Comment::GetID());
 598   for (; aLabIter2.More(); aLabIter2.Next()) {
 599     TDF_Label aFeatureLabel = aLabIter2.Value()->Label();
 600     if (myFeatures.IsBound(aFeatureLabel)) {  // a new feature is inserted
 601       FeaturePtr aFeature = myFeatures.Find(aFeatureLabel);
 602       if (std::dynamic_pointer_cast<ModelAPI_CompositeFeature>(aFeature).get())
 603         aComposites.push_back(aFeature);
 604       updateResults(aFeature);
 605     }
 606   }
 607   std::list<FeaturePtr>::iterator aComposite = aComposites.begin();
 608   for(; aComposite != aComposites.end(); aComposite++) {
 609     updateResults(*aComposite);
 610   }
 611
 612   // the synchronize should be done after updateResults in order to correct back references of updated results
 613   if (theUpdateReferences) {
 614     synchronizeBackRefs();
 615   }
 616   if (theMarkUpdated) { // this means there is no control what was modified => remove history cash
 617     myHistory.clear();
 618   }
 619
 620   anOwner->executeFeatures() = false;
 621   aLoop->activateFlushes(isActive);
 622
 623   if (theFlush) {
 624     aLoop->flush(aCreateEvent);
 625     aLoop->flush(aDeleteEvent);
 626     aLoop->flush(anUpdateEvent);
 627     aLoop->flush(aRedispEvent);
 628     aLoop->flush(aToHideEvent);
 629   }
 630   anOwner->executeFeatures() = true;
 631 }
 632
 633 void Model_Objects::synchronizeBackRefs()
 634 {
 635   // keeps the concealed flags of result to catch the change and create created/deleted events
 636   std::list<std::pair<ResultPtr, bool> > aConcealed;
 637   // first cycle: erase all data about back-references
 638   NCollection_DataMap<TDF_Label, FeaturePtr>::Iterator aFeatures(myFeatures);
 639   for(; aFeatures.More(); aFeatures.Next()) {
 640     FeaturePtr aFeature = aFeatures.Value();
 641     std::shared_ptr<Model_Data> aFData =
 642       std::dynamic_pointer_cast<Model_Data>(aFeature->data());
 643     if (aFData) {
 644       aFData->eraseBackReferences();
 645     }
 646     const std::list<std::shared_ptr<ModelAPI_Result> >& aResults = aFeature->results();
 647     std::list<std::shared_ptr<ModelAPI_Result> >::const_iterator aRIter = aResults.begin();
 648     for (; aRIter != aResults.cend(); aRIter++) {
 649       std::shared_ptr<Model_Data> aResData =
 650         std::dynamic_pointer_cast<Model_Data>((*aRIter)->data());
 651       if (aResData) {
 652         aConcealed.push_back(std::pair<ResultPtr, bool>(*aRIter, (*aRIter)->isConcealed()));
 653         aResData->eraseBackReferences();
 654       }
 655     }
 656   }
 657
 658   // second cycle: set new back-references: only features may have reference, iterate only them
 659   ModelAPI_ValidatorsFactory* aValidators = ModelAPI_Session::get()->validators();
 660   for(aFeatures.Initialize(myFeatures); aFeatures.More(); aFeatures.Next()) {
 661     FeaturePtr aFeature = aFeatures.Value();
 662     std::shared_ptr<Model_Data> aFData =
 663       std::dynamic_pointer_cast<Model_Data>(aFeature->data());
 664     if (aFData) {
 665       std::list<std::pair<std::string, std::list<ObjectPtr> > > aRefs;
 666       aFData->referencesToObjects(aRefs);
 667       std::list<std::pair<std::string, std::list<ObjectPtr> > >::iterator
 668         aRefsIter = aRefs.begin();
 669       for(; aRefsIter != aRefs.end(); aRefsIter++) {
 670         std::list<ObjectPtr>::iterator aRefTo = aRefsIter->second.begin();
 671         for(; aRefTo != aRefsIter->second.end(); aRefTo++) {
 672           if (*aRefTo) {
 673             std::shared_ptr<Model_Data> aRefData =
 674               std::dynamic_pointer_cast<Model_Data>((*aRefTo)->data());
 675             aRefData->addBackReference(aFeature, aRefsIter->first); // here the Concealed flag is updated
 676             // update enable/disable status: the nested status must be equal to the composite
 677             CompositeFeaturePtr aComp =
 678               std::dynamic_pointer_cast<ModelAPI_CompositeFeature>(aFeature);
 679             if (aComp.get()) {
 680               FeaturePtr aReferenced = std::dynamic_pointer_cast<ModelAPI_Feature>(*aRefTo);
 681               if (aReferenced.get()) {
 682                 aReferenced->setDisabled(aComp->isDisabled());
 683               }
 684             }
 685           }
 686         }
 687       }
 688     }
 689   }
 690   std::list<std::pair<ResultPtr, bool> >::iterator aCIter = aConcealed.begin();
 691   for(; aCIter != aConcealed.end(); aCIter++) {
 692     if (aCIter->first->isConcealed() != aCIter->second) { // somethign is changed => produce event
 693       if (aCIter->second) { // was concealed become not => creation event
 694         static Events_ID anEvent = Events_Loop::eventByName(EVENT_OBJECT_CREATED);
 695         ModelAPI_EventCreator::get()->sendUpdated(aCIter->first, anEvent);
 696       } else { // was not concealed become concealed => delete event
 697         ModelAPI_EventCreator::get()->sendDeleted(myDoc, aCIter->first->groupName());
 698         // redisplay for the viewer (it must be disappeared also)
 699         static Events_ID EVENT_DISP =
 700           Events_Loop::loop()->eventByName(EVENT_OBJECT_TO_REDISPLAY);
 701         ModelAPI_EventCreator::get()->sendUpdated(aCIter->first, EVENT_DISP);
 702       }
 703     }
 704   }
 705 }
 706
 707 TDF_Label Model_Objects::resultLabel(
 708   const std::shared_ptr<ModelAPI_Data>& theFeatureData, const int theResultIndex)
 709 {
 710   const std::shared_ptr<Model_Data>& aData =
 711     std::dynamic_pointer_cast<Model_Data>(theFeatureData);
 712   return aData->label().Father().FindChild(TAG_FEATURE_RESULTS).FindChild(theResultIndex + 1);
 713 }
 714
 715 void Model_Objects::storeResult(std::shared_ptr<ModelAPI_Data> theFeatureData,
 716                                  std::shared_ptr<ModelAPI_Result> theResult,
 717                                  const int theResultIndex)
 718 {
 719   theResult->setDoc(myDoc);
 720   initData(theResult, resultLabel(theFeatureData, theResultIndex), TAG_FEATURE_ARGUMENTS);
 721   if (theResult->data()->name().empty()) {  // if was not initialized, generate event and set a name
 722     std::stringstream aNewName;
 723     aNewName<<theFeatureData->name();
 724     if (theResultIndex > 0) // if there are several results, add unique prefix starting from second
 725       aNewName<<"_"<<theResultIndex + 1;
 726     theResult->data()->setName(aNewName.str());
 727   }
 728 }
 729
 730 std::shared_ptr<ModelAPI_ResultConstruction> Model_Objects::createConstruction(
 731     const std::shared_ptr<ModelAPI_Data>& theFeatureData, const int theIndex)
 732 {
 733   TDF_Label aLab = resultLabel(theFeatureData, theIndex);
 734   TDataStd_Comment::Set(aLab, ModelAPI_ResultConstruction::group().c_str());
 735   ObjectPtr anOldObject = object(aLab);
 736   std::shared_ptr<ModelAPI_ResultConstruction> aResult;
 737   if (anOldObject) {
 738     aResult = std::dynamic_pointer_cast<ModelAPI_ResultConstruction>(anOldObject);
 739   }
 740   if (!aResult) {
 741     aResult = std::shared_ptr<ModelAPI_ResultConstruction>(new Model_ResultConstruction);
 742     storeResult(theFeatureData, aResult, theIndex);
 743   }
 744   return aResult;
 745 }
 746
 747 std::shared_ptr<ModelAPI_ResultBody> Model_Objects::createBody(
 748     const std::shared_ptr<ModelAPI_Data>& theFeatureData, const int theIndex)
 749 {
 750   TDF_Label aLab = resultLabel(theFeatureData, theIndex);
 751   TDataStd_Comment::Set(aLab, ModelAPI_ResultBody::group().c_str());
 752   ObjectPtr anOldObject = object(aLab);
 753   std::shared_ptr<ModelAPI_ResultBody> aResult;
 754   if (anOldObject) {
 755     aResult = std::dynamic_pointer_cast<ModelAPI_ResultBody>(anOldObject);
 756   }
 757   if (!aResult) {
 758     aResult = std::shared_ptr<ModelAPI_ResultBody>(new Model_ResultBody);
 759     storeResult(theFeatureData, aResult, theIndex);
 760   }
 761   return aResult;
 762 }
 763
 764 std::shared_ptr<ModelAPI_ResultPart> Model_Objects::createPart(
 765     const std::shared_ptr<ModelAPI_Data>& theFeatureData, const int theIndex)
 766 {
 767   TDF_Label aLab = resultLabel(theFeatureData, theIndex);
 768   TDataStd_Comment::Set(aLab, ModelAPI_ResultPart::group().c_str());
 769   ObjectPtr anOldObject = object(aLab);
 770   std::shared_ptr<ModelAPI_ResultPart> aResult;
 771   if (anOldObject) {
 772     aResult = std::dynamic_pointer_cast<ModelAPI_ResultPart>(anOldObject);
 773   }
 774   if (!aResult) {
 775     aResult = std::shared_ptr<ModelAPI_ResultPart>(new Model_ResultPart);
 776     storeResult(theFeatureData, aResult, theIndex);
 777   }
 778   return aResult;
 779 }
 780
 781 std::shared_ptr<ModelAPI_ResultPart> Model_Objects::copyPart(
 782     const std::shared_ptr<ModelAPI_Result>& theOldPart,
 783     const std::shared_ptr<ModelAPI_ResultPart>& theOrigin, const int theIndex)
 784 {
 785   std::shared_ptr<ModelAPI_ResultPart> aResult;
 786   if (theOldPart.get()) {
 787     aResult = std::dynamic_pointer_cast<ModelAPI_ResultPart>(theOldPart);
 788   }
 789   if (!aResult) {
 790     aResult = std::shared_ptr<ModelAPI_ResultPart>(new Model_ResultPart);
 791     aResult->setDoc(myDoc);
 792     aResult->setData(theOrigin->data());
 793   }
 794   return aResult;
 795 }
 796
 797 std::shared_ptr<ModelAPI_ResultGroup> Model_Objects::createGroup(
 798     const std::shared_ptr<ModelAPI_Data>& theFeatureData, const int theIndex)
 799 {
 800   TDF_Label aLab = resultLabel(theFeatureData, theIndex);
 801   TDataStd_Comment::Set(aLab, ModelAPI_ResultGroup::group().c_str());
 802   ObjectPtr anOldObject = object(aLab);
 803   std::shared_ptr<ModelAPI_ResultGroup> aResult;
 804   if (anOldObject) {
 805     aResult = std::dynamic_pointer_cast<ModelAPI_ResultGroup>(anOldObject);
 806   }
 807   if (!aResult) {
 808     aResult = std::shared_ptr<ModelAPI_ResultGroup>(new Model_ResultGroup(theFeatureData));
 809     storeResult(theFeatureData, aResult, theIndex);
 810   }
 811   return aResult;
 812 }
 813
 814 std::shared_ptr<ModelAPI_ResultParameter> Model_Objects::createParameter(
 815       const std::shared_ptr<ModelAPI_Data>& theFeatureData, const int theIndex)
 816 {
 817   TDF_Label aLab = resultLabel(theFeatureData, theIndex);
 818   TDataStd_Comment::Set(aLab, ModelAPI_ResultParameter::group().c_str());
 819   ObjectPtr anOldObject = object(aLab);
 820   std::shared_ptr<ModelAPI_ResultParameter> aResult;
 821   if (anOldObject) {
 822     aResult = std::dynamic_pointer_cast<ModelAPI_ResultParameter>(anOldObject);
 823   }
 824   if (!aResult) {
 825     aResult = std::shared_ptr<ModelAPI_ResultParameter>(new Model_ResultParameter);
 826     storeResult(theFeatureData, aResult, theIndex);
 827   }
 828   return aResult;
 829 }
 830
 831 std::shared_ptr<ModelAPI_Feature> Model_Objects::feature(
 832     const std::shared_ptr<ModelAPI_Result>& theResult)
 833 {
 834   std::shared_ptr<Model_Data> aData = std::dynamic_pointer_cast<Model_Data>(theResult->data());
 835   if (aData) {
 836     TDF_Label aFeatureLab = aData->label().Father().Father().Father();
 837     return feature(aFeatureLab);
 838   }
 839   return FeaturePtr();
 840 }
 841
 842 std::string Model_Objects::featureResultGroup(FeaturePtr theFeature)
 843 {
 844   if (theFeature->data()->isValid()) {
 845     TDF_ChildIterator aLabIter(resultLabel(theFeature->data(), 0).Father());
 846     if (aLabIter.More()) {
 847       TDF_Label anArgLab = aLabIter.Value();
 848       Handle(TDataStd_Comment) aGroup;
 849       if (aLabIter.Value().FindAttribute(TDataStd_Comment::GetID(), aGroup)) {
 850         return TCollection_AsciiString(aGroup->Get()).ToCString();
 851       }
 852     }
 853   }
 854   static std::string anEmpty;
 855   return anEmpty; // not found
 856 }
 857
 858 void Model_Objects::updateResults(FeaturePtr theFeature)
 859 {
 860   // for not persistent is will be done by parametric updater automatically
 861   //if (!theFeature->isPersistentResult()) return;
 862   // check the existing results and remove them if there is nothing on the label
 863   std::list<ResultPtr>::const_iterator aResIter = theFeature->results().cbegin();
 864   while(aResIter != theFeature->results().cend()) {
 865     ResultPtr aBody = std::dynamic_pointer_cast<ModelAPI_Result>(*aResIter);
 866     if (aBody.get()) {
 867       if (!aBody->data()->isValid()) {
 868         // found a disappeared result => remove it
 869         theFeature->eraseResultFromList(aBody);
 870         // start iterate from beginning because iterator is corrupted by removing
 871         aResIter = theFeature->results().cbegin();
 872         continue;
 873       }
 874     }
 875     aResIter++;
 876   }
 877   // it may be on undo
 878   if (!theFeature->data() || !theFeature->data()->isValid() || theFeature->isDisabled())
 879     return;
 880   // check that results are presented on all labels
 881   int aResSize = theFeature->results().size();
 882   TDF_ChildIterator aLabIter(resultLabel(theFeature->data(), 0).Father());
 883   for(; aLabIter.More(); aLabIter.Next()) {
 884     // here must be GUID of the feature
 885     int aResIndex = aLabIter.Value().Tag() - 1;
 886     ResultPtr aNewBody;
 887     if (aResSize <= aResIndex) {
 888       TDF_Label anArgLab = aLabIter.Value();
 889       Handle(TDataStd_Comment) aGroup;
 890       if (anArgLab.FindAttribute(TDataStd_Comment::GetID(), aGroup)) {
 891         if (aGroup->Get() == ModelAPI_ResultBody::group().c_str()) {
 892           aNewBody = createBody(theFeature->data(), aResIndex);
 893         } else if (aGroup->Get() == ModelAPI_ResultPart::group().c_str()) {
 894           std::shared_ptr<ModelAPI_ResultPart> aNewP = createPart(theFeature->data(), aResIndex);
 895           theFeature->setResult(aNewP, aResIndex);
 896           if (!aNewP->partDoc().get())
 897             theFeature->execute(); // create the part result: it is better to restore the previous result if it is possible
 898           break;
 899         } else if (aGroup->Get() == ModelAPI_ResultConstruction::group().c_str()) {
 900           theFeature->execute(); // construction shapes are needed for sketch solver
 901           break;
 902         } else if (aGroup->Get() == ModelAPI_ResultGroup::group().c_str()) {
 903           aNewBody = createGroup(theFeature->data(), aResIndex);
 904         } else if (aGroup->Get() == ModelAPI_ResultParameter::group().c_str()) {
 905           theFeature->attributeChanged("expression"); // just produce a value
 906           break;
 907         } else {
 908           Events_Error::send(std::string("Unknown type of result is found in the document:") +
 909             TCollection_AsciiString(aGroup->Get()).ToCString());
 910         }
 911       }
 912       if (aNewBody) {
 913         theFeature->setResult(aNewBody, aResIndex);
 914       }
 915     }
 916   }
 917 }
 918
 919 ResultPtr Model_Objects::findByName(const std::string theName)
 920 {
 921   NCollection_DataMap<TDF_Label, FeaturePtr>::Iterator anObjIter(myFeatures);
 922   for(; anObjIter.More(); anObjIter.Next()) {
 923     FeaturePtr& aFeature = anObjIter.ChangeValue();
 924     if (!aFeature.get() || aFeature->isDisabled()) // may be on close
 925       continue;
 926     const std::list<std::shared_ptr<ModelAPI_Result> >& aResults = aFeature->results();
 927     std::list<std::shared_ptr<ModelAPI_Result> >::const_iterator aRIter = aResults.begin();
 928     for (; aRIter != aResults.cend(); aRIter++) {
 929       ResultPtr aRes = *aRIter;
 930       if (aRes.get() && aRes->data() && aRes->data()->isValid() && !aRes->isDisabled() &&
 931           aRes->data()->name() == theName) {
 932         return aRes;
 933       }
 934     }
 935   }
 936   // not found
 937   return ResultPtr();
 938 }
 939
 940 FeaturePtr Model_Objects::nextFeature(FeaturePtr theCurrent, const bool theReverse)
 941 {
 942   std::shared_ptr<Model_Data> aData = std::static_pointer_cast<Model_Data>(theCurrent->data());
 943   if (aData && aData->isValid()) {
 944     TDF_Label aFeatureLabel = aData->label().Father();
 945     Handle(TDataStd_ReferenceArray) aRefs;
 946     if (featuresLabel().FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs)) {
 947       for(int a = aRefs->Lower(); a <= aRefs->Upper(); a++) { // iterate all existing features
 948         if (aRefs->Value(a).IsEqual(aFeatureLabel)) {
 949           a += theReverse ? -1 : 1;
 950           if (a >= aRefs->Lower() && a <= aRefs->Upper())
 951             return feature(aRefs->Value(a));
 952           break; // finish iiteration: it's last feature
 953         }
 954       }
 955     }
 956   }
 957   return FeaturePtr(); // not found, last, or something is wrong
 958 }
 959
 960 FeaturePtr Model_Objects::firstFeature()
 961 {
 962   Handle(TDataStd_ReferenceArray) aRefs;
 963   if (featuresLabel().FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs)) {
 964     return feature(aRefs->Value(aRefs->Lower()));
 965   }
 966   return FeaturePtr(); // no features at all
 967 }
 968
 969 FeaturePtr Model_Objects::lastFeature()
 970 {
 971   Handle(TDataStd_ReferenceArray) aRefs;
 972   if (featuresLabel().FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs)) {
 973     return feature(aRefs->Value(aRefs->Upper()));
 974   }
 975   return FeaturePtr(); // no features at all
 976 }
 977
 978 std::list<std::shared_ptr<ModelAPI_Feature> > Model_Objects::allFeatures()
 979 {
 980   std::list<std::shared_ptr<ModelAPI_Feature> > aResult;
 981   Handle(TDataStd_ReferenceArray) aRefs;
 982   if (featuresLabel().FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs)) {
 983     for(int a = aRefs->Lower(); a <= aRefs->Upper(); a++) {
 984       FeaturePtr aFeature = feature(aRefs->Value(a));
 985       if (aFeature.get())
 986         aResult.push_back(aFeature);
 987     }
 988   }
 989   return aResult;
 990 }
 991
 992 int Model_Objects::numInternalFeatures()
 993 {
 994   Handle(TDataStd_ReferenceArray) aRefs;
 995   if (featuresLabel().FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs)) {
 996     return aRefs->Upper() - aRefs->Lower() + 1;
 997   }
 998   return 0; // invalid
 999 }
1000
1001 std::shared_ptr<ModelAPI_Feature> Model_Objects::internalFeature(const int theIndex)
1002 {
1003   Handle(TDataStd_ReferenceArray) aRefs;
1004   if (featuresLabel().FindAttribute(TDataStd_ReferenceArray::GetID(), aRefs)) {
1005     return feature(aRefs->Value(aRefs->Lower() + theIndex));
1006   }
1007   return FeaturePtr(); // invalid
1008 }
1009
1010 Standard_Integer HashCode(const TDF_Label& theLab, const Standard_Integer theUpper)
1011 {
1012   return TDF_LabelMapHasher::HashCode(theLab, theUpper);
1013
1014 }
1015 Standard_Boolean IsEqual(const TDF_Label& theLab1, const TDF_Label& theLab2)
1016 {
1017   return TDF_LabelMapHasher::IsEqual(theLab1, theLab2);
1018 }