+// =====================
+// class MySetIterator
+// =====================
+
+template<typename T> class MySetIterator:public SMDS_Iterator<const T*>
+{
+ typedef const set<const T*> TSet;
+ typename TSet::const_iterator myIt;
+ TSet& mySet;
+
+ public:
+ MySetIterator(const set<const T*>& s):mySet(s), myIt(s.begin())
+ {
+ }
+
+ bool more()
+ {
+ return myIt!=mySet.end();
+ }
+ const T* next()
+ {
+ const T* t=*myIt;
+ myIt++;
+ return t;
+ }
+};
+
+// =====================
+// class MyIterator
+// =====================
+
+template<typename VALUE> class MyIterator : public SMDS_Iterator<VALUE>
+{
+ public:
+ MyIterator (const set<const SMESHDS_SubMesh*>& theSubMeshes)
+ : mySubMeshes( theSubMeshes ), mySubIt( theSubMeshes.begin() ), myMore(false)
+ {}
+ bool more()
+ {
+ while (( !myElemIt.get() || !myElemIt->more() ) &&
+ mySubIt != mySubMeshes.end())
+ {
+ myElemIt = getElements(*mySubIt);
+ mySubIt++;
+ }
+ myMore = myElemIt.get() && myElemIt->more();
+ return myMore;
+ }
+ VALUE next()
+ {
+ VALUE elem = 0;
+ if ( myMore )
+ elem = myElemIt->next();
+ return elem;
+ }
+ protected:
+ virtual boost::shared_ptr< SMDS_Iterator<VALUE> >
+ getElements(const SMESHDS_SubMesh*) const = 0;
+
+ private:
+ bool myMore;
+ const set<const SMESHDS_SubMesh*>& mySubMeshes;
+ set<const SMESHDS_SubMesh*>::const_iterator mySubIt;
+ boost::shared_ptr< SMDS_Iterator<VALUE> > myElemIt;
+};
+
+// =====================
+// class MyElemIterator
+// =====================
+
+class MyElemIterator: public MyIterator<const SMDS_MeshElement*>
+{
+ public:
+ MyElemIterator (const set<const SMESHDS_SubMesh*>& theSubMeshes)
+ :MyIterator<const SMDS_MeshElement*>( theSubMeshes ) {}
+ SMDS_ElemIteratorPtr getElements(const SMESHDS_SubMesh* theSubMesh) const
+ { return theSubMesh->GetElements(); }
+};
+
+// =====================
+// class MyNodeIterator
+// =====================
+
+class MyNodeIterator: public MyIterator<const SMDS_MeshNode*>
+{
+ public:
+ MyNodeIterator (const set<const SMESHDS_SubMesh*>& theSubMeshes)
+ :MyIterator<const SMDS_MeshNode*>( theSubMeshes ) {}
+ SMDS_NodeIteratorPtr getElements(const SMESHDS_SubMesh* theSubMesh) const
+ { return theSubMesh->GetNodes(); }
+};
+