From: jrt <jrt>
Date: Mon, 16 Feb 2004 10:13:47 +0000 (+0000)
Subject: Import mesh is now done in the SMESH container, not in SMESHGUI. Each mesh file parse... 
X-Git-Url: http://git.salome-platform.org/gitweb/?p=modules%2Fsmesh.git;a=commitdiff_plain;h=c33d1b01132679f24994aa63d2a7aedbd348c3ef

Import mesh is now done in the SMESH container, not in SMESHGUI. Each mesh file parser and writer is a plugin loadable as a shared library
---

diff --git a/idl/SMESH_Gen.idl b/idl/SMESH_Gen.idl
index c30750bf0..82136fee1 100644
--- a/idl/SMESH_Gen.idl
+++ b/idl/SMESH_Gen.idl
@@ -104,7 +104,13 @@ module SMESH
     //				 in shape_array listOfSubShape)
     //  raises (SALOME::SALOME_Exception);
     
-
+	/**
+	 * Import a mesh from a file.
+	 * @param fileName file name to be imported.
+	 * @param fileType Currently it could be either "DAT", "UNV" or "MED".
+	 * @param studyId The id of the current study.
+	 */
+	SMESH_Mesh Import(in long studyId, in string fileName, in string fileType);
   };
 
 };
diff --git a/idl/SMESH_Mesh.idl b/idl/SMESH_Mesh.idl
index a051ada9d..ea65c8d3f 100644
--- a/idl/SMESH_Mesh.idl
+++ b/idl/SMESH_Mesh.idl
@@ -161,13 +161,11 @@ module SMESH
        raises (SALOME::SALOME_Exception);
 
     /*!
-     * Export Mesh with DAT and MED Formats
+     * Export mesh to a file
+	 * @param fileName file name where to export the file
+	 * @param fileType Currently it could be either "DAT", "UNV" or "MED".
      */
-    void ExportDAT( in string file )
-      raises (SALOME::SALOME_Exception);
-    void ExportMED( in string file )
-      raises (SALOME::SALOME_Exception);
-    void ExportUNV( in string file )
+    void Export( in string fileName, in string fileType )
       raises (SALOME::SALOME_Exception);
 
     /*!
diff --git a/src/Driver/Document_Reader.cxx b/src/Driver/Document_Reader.cxx
index 26dcf1450..edb1c77a9 100644
--- a/src/Driver/Document_Reader.cxx
+++ b/src/Driver/Document_Reader.cxx
@@ -38,3 +38,16 @@ void Document_Reader::SetDocument(SMESHDS_Document * aDoc)
 {
 	myDocument = aDoc;
 }
+
+void Document_Reader::Read()
+{
+	int myMeshId = myDocument->NewMesh();
+	SMDS_Mesh * myMesh = myDocument->GetMesh(myMeshId);
+	myReader->SetMesh(myMesh);
+	myReader->SetFile(myFile);
+	myReader->Read();
+}
+
+Document_Reader::Document_Reader(Mesh_Reader* reader): myReader(reader)
+{
+}
diff --git a/src/Driver/Document_Reader.h b/src/Driver/Document_Reader.h
index 2766466c2..719665856 100644
--- a/src/Driver/Document_Reader.h
+++ b/src/Driver/Document_Reader.h
@@ -28,17 +28,22 @@
 #define _INCLUDE_DOCUMENT_READER
 
 #include "SMESHDS_Document.hxx"
+#include "Mesh_Reader.h"
 #include <string>
 
 class Document_Reader
 {
   public:
-	virtual void Read() = 0;
+	virtual void Read();
 	void SetFile(string);
 	void SetDocument(SMESHDS_Document *);
+	Document_Reader(Mesh_Reader*);
 
   protected:
-	  SMESHDS_Document * myDocument;
+	SMESHDS_Document * myDocument;
 	string myFile;
+
+  private:
+	Mesh_Reader* myReader;
 };
 #endif
diff --git a/src/Driver/Document_Writer.cxx b/src/Driver/Document_Writer.cxx
index 8704c1284..95f195dc3 100644
--- a/src/Driver/Document_Writer.cxx
+++ b/src/Driver/Document_Writer.cxx
@@ -18,14 +18,9 @@
 //  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA 
 // 
 //  See http://www.opencascade.org/SALOME/ or email : webmaster.salome@opencascade.org 
-//
-//
-//
-//  File   : Document_Writer.cxx
-//  Module : SMESH
 
-using namespace std;
 #include "Document_Writer.h"
+#include "utilities.h"
 
 void Document_Writer::SetFile(string aFile)
 {
@@ -36,3 +31,28 @@ void Document_Writer::SetDocument(SMESHDS_Document * aDoc)
 {
 	myDocument = aDoc;
 }
+
+void Document_Writer::Write()
+{
+	SCRUTE(myFile);
+	SMESHDS_Mesh * myMesh;
+	int nb_of_meshes = myDocument->NbMeshes();	//voir avec Yves
+	SCRUTE(nb_of_meshes);
+
+	int numero = 0;
+
+	myDocument->InitMeshesIterator();
+	while(myDocument->MoreMesh())
+	{
+		numero++;
+		myMesh = myDocument->NextMesh();
+		myWriter->SetMesh(myMesh);
+		myWriter->SetFile(myFile);
+		myWriter->SetMeshId(numero);
+		myWriter->Add();
+	}
+}
+
+Document_Writer::Document_Writer(Mesh_Writer* writer): myWriter(writer)
+{
+}
diff --git a/src/Driver/Document_Writer.h b/src/Driver/Document_Writer.h
index 4aea9605c..f50b59486 100644
--- a/src/Driver/Document_Writer.h
+++ b/src/Driver/Document_Writer.h
@@ -28,17 +28,21 @@
 #define _INCLUDE_DOCUMENT_WRITER
 
 #include "SMESHDS_Document.hxx"
+#include "Mesh_Writer.h"
 #include <string>
 
 class Document_Writer
 {
 
-  public:virtual void Write() = 0;
+  public:virtual void Write();
 	void SetFile(string);
 	void SetDocument(SMESHDS_Document *);
+	Document_Writer(Mesh_Writer* );
 
-  protected:  SMESHDS_Document * myDocument;
+  protected:
+	SMESHDS_Document * myDocument;
 	string myFile;
+	Mesh_Writer * myWriter;
 
 };
 #endif
diff --git a/src/Driver/Makefile.in b/src/Driver/Makefile.in
index 6016ac85f..cad4d3b89 100644
--- a/src/Driver/Makefile.in
+++ b/src/Driver/Makefile.in
@@ -35,11 +35,21 @@ VPATH=.:@srcdir@
 @COMMENCE@
 
 # header files 
-EXPORT_HEADERS= Document_Reader.h Document_Writer.h Mesh_Reader.h Mesh_Writer.h
+EXPORT_HEADERS = \
+	SMESHDriver.h \
+	Document_Reader.h \
+	Document_Writer.h \
+	Mesh_Reader.h \
+	Mesh_Writer.h
 
 # Libraries targets
 LIB = libMeshDriver.la
-LIB_SRC = Document_Reader.cxx Document_Writer.cxx Mesh_Reader.cxx Mesh_Writer.cxx
+LIB_SRC = \
+	SMESHDriver.cxx \
+	Document_Reader.cxx \
+	Document_Writer.cxx 
+#	Mesh_Reader.cxx \
+#	Mesh_Writer.cxx \
 
 LIB_CLIENT_IDL =
 
diff --git a/src/Driver/SMESHDriver.cxx b/src/Driver/SMESHDriver.cxx
index 83e9037a5..696c00d88 100644
--- a/src/Driver/SMESHDriver.cxx
+++ b/src/Driver/SMESHDriver.cxx
@@ -1,4 +1,4 @@
-//  SMESH Driver : implementaion of driver for reading and writing	
+//  SMESH Driver : implementation of driver for reading and writing	
 //
 //  Copyright (C) 2003  OPEN CASCADE, EADS/CCR, LIP6, CEA/DEN,
 //  CEDRAT, EDF R&D, LEG, PRINCIPIA R&D, BUREAU VERITAS 
@@ -18,122 +18,97 @@
 //  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA 
 // 
 //  See http://www.opencascade.org/SALOME/ or email : webmaster.salome@opencascade.org 
-//
-//
-//
-//  File   : SMESHDriver.cxx
-//  Module : SMESH
 
-using namespace std;
 #include "SMESHDriver.h"
 
 #include <dlfcn.h>
 #include <utilities.h>
 
-//A enlever
-#include "DriverMED_R_SMESHDS_Document.h"
-#include "DriverMED_R_SMESHDS_Mesh.h"
-#include "DriverMED_R_SMDS_Mesh.h"
-#include "DriverMED_W_SMESHDS_Document.h"
-#include "DriverMED_W_SMESHDS_Mesh.h"
-#include "DriverMED_W_SMDS_Mesh.h"
-
-#include "DriverDAT_R_SMESHDS_Document.h"
-#include "DriverDAT_R_SMESHDS_Mesh.h"
-#include "DriverDAT_R_SMDS_Mesh.h"
-#include "DriverDAT_W_SMESHDS_Document.h"
-#include "DriverDAT_W_SMESHDS_Mesh.h"
-#include "DriverDAT_W_SMDS_Mesh.h"
-//
-
-Document_Reader* SMESHDriver::GetDocumentReader(string Extension, string Class) {
-  if (Extension==string("MED")) {
-    DriverMED_R_SMESHDS_Document* myDriver = new DriverMED_R_SMESHDS_Document();
-    return (myDriver);
-  }
-  else if (Extension==string("DAT")) {
-    DriverDAT_R_SMESHDS_Document* myDriver = new DriverDAT_R_SMESHDS_Document();
-    return (myDriver);
-  }
-  else {
-    MESSAGE("No driver known for this extension");
-    return (Document_Reader*)NULL;
-  }
-
-
+Document_Reader* SMESHDriver::GetDocumentReader(string Extension)
+{
+	// if there is not document reader in the driver create a default
+	// one with the mesh reader.
+	Document_Reader * docReader=
+		(Document_Reader*)getMeshDocumentDriver(Extension);
+
+	if(docReader==NULL)
+	{
+		Mesh_Reader * reader=GetMeshReader(Extension);
+		if(reader==NULL)
+		{
+	    	MESSAGE("No driver known for this extension");
+			return NULL;
+		}
+		return new Document_Reader(reader);
+	}
+	else return docReader;
 }
 
-Document_Writer* SMESHDriver::GetDocumentWriter(string Extension, string Class) {
-  if (Extension==string("MED")) {
-    DriverMED_W_SMESHDS_Document* myDriver = new DriverMED_W_SMESHDS_Document();
-    return (myDriver);
-  }    
-  else if (Extension==string("DAT")) {
-    DriverDAT_W_SMESHDS_Document* myDriver = new DriverDAT_W_SMESHDS_Document();
-    return (myDriver);
-  }    
-  else {
-    MESSAGE("No driver known for this extension");
-    return (Document_Writer*)NULL;
-  }
-
-
+Document_Writer* SMESHDriver::GetDocumentWriter(string Extension)
+{
+	Mesh_Writer * writer=GetMeshWriter(Extension);
+	if(writer==NULL)
+	{
+    	MESSAGE("No driver known for this extension");
+		return NULL;
+	}
+	return new Document_Writer(writer);
 }
 
-Mesh_Reader* SMESHDriver::GetMeshReader(string Extension, string Class) {
-  if (Extension==string("MED")) {
-
-  if (strcmp(Class.c_str(),"SMESHDS_Mesh")==0) {
-    DriverMED_R_SMESHDS_Mesh* myDriver = new DriverMED_R_SMESHDS_Mesh();
-    return (myDriver);
-  }
-  else if (strcmp(Class.c_str(),"SMDS_Mesh")==0) {
-    DriverMED_R_SMDS_Mesh* myDriver = new DriverMED_R_SMDS_Mesh();
-    return (myDriver);
-  }
-
-  }
-  else if (Extension==string("DAT")) {
-
-  if (strcmp(Class.c_str(),"SMESHDS_Mesh")==0) {
-    DriverDAT_R_SMESHDS_Mesh* myDriver = new DriverDAT_R_SMESHDS_Mesh();
-    return (myDriver);
-  }
-  else if (strcmp(Class.c_str(),"SMDS_Mesh")==0) {
-    DriverDAT_R_SMDS_Mesh* myDriver = new DriverDAT_R_SMDS_Mesh();
-    return (myDriver);
-  }
-
-  }
-
-
+Mesh_Reader* SMESHDriver::GetMeshReader(string extension)
+{
+	void * driver = getMeshDriver(extension, string("Reader"));
+	return (Mesh_Reader*)driver;
 }
 
-Mesh_Writer* SMESHDriver::GetMeshWriter(string Extension, string Class) {
-  if (Extension==string("MED")) {
-
-  if (strcmp(Class.c_str(),"SMESHDS_Mesh")==0) {
-    DriverMED_W_SMESHDS_Mesh* myDriver = new DriverMED_W_SMESHDS_Mesh();
-    return (myDriver);
-  }
-  else if (strcmp(Class.c_str(),"SMDS_Mesh")==0) {
-    DriverMED_W_SMDS_Mesh* myDriver = new DriverMED_W_SMDS_Mesh();
-    return (myDriver);
-  }
-
-  }
-  else if (Extension==string("DAT")) {
-
-  if (strcmp(Class.c_str(),"SMESHDS_Mesh")==0) {
-    DriverDAT_W_SMESHDS_Mesh* myDriver = new DriverDAT_W_SMESHDS_Mesh();
-    return (myDriver);
-  }
-  else if (strcmp(Class.c_str(),"SMDS_Mesh")==0) {
-    DriverDAT_W_SMDS_Mesh* myDriver = new DriverDAT_W_SMDS_Mesh();
-    return (myDriver);
-  }
-
-  }
+Mesh_Writer* SMESHDriver::GetMeshWriter(string extension)
+{
+	void * driver = getMeshDriver(extension, string("Writer"));
+	return (Mesh_Writer*)driver;
+}
 
+void * SMESHDriver::getMeshDriver(string extension, string type)
+{
+	string libName = string("libMeshDriver")+extension+string(".so");
+	void * handle = dlopen(libName.c_str(), RTLD_LAZY);
+	if(!handle)
+	{
+		fputs (dlerror(), stderr);
+		return NULL;
+	}
+	else
+	{
+		void * (*factory)();
+		string symbol = string("SMESH_create")+extension+string("Mesh")+type;
+		factory = (void * (*)()) dlsym(handle, symbol.c_str());
+		if(factory==NULL)
+		{
+			fputs (dlerror(), stderr);
+			return NULL;
+		}
+		else return factory();
+	}
 }
 
+void * SMESHDriver::getMeshDocumentDriver(string extension)
+{
+	string libName = string("libMeshDriver")+extension+string(".so");
+	void * handle = dlopen(libName.c_str(), RTLD_LAZY);
+	if(!handle)
+	{
+		fputs (dlerror(), stderr);
+		return NULL;
+	}
+	else
+	{
+		void * (*factory)();
+		string symbol = string("SMESH_create")+extension+string("DocumentReader");
+		factory = (void * (*)()) dlsym(handle, symbol.c_str());
+		if(factory==NULL)
+		{
+			fputs (dlerror(), stderr);
+			return NULL;
+		}
+		else return factory();
+	}
+}
diff --git a/src/Driver/SMESHDriver.h b/src/Driver/SMESHDriver.h
index 78731c33d..119208c2e 100644
--- a/src/Driver/SMESHDriver.h
+++ b/src/Driver/SMESHDriver.h
@@ -32,14 +32,17 @@
 #include "Mesh_Reader.h"
 #include "Mesh_Writer.h"
 
-class SMESHDriver {
-
+class SMESHDriver
+{
   public :
-    static Document_Reader* GetDocumentReader(string Extension, string Class);
-    static Document_Writer* GetDocumentWriter(string Extension, string Class);
+    static Document_Reader* GetDocumentReader(string Extension);
+    static Document_Writer* GetDocumentWriter(string Extension);
 
-    static Mesh_Reader* GetMeshReader(string Extension, string Class);
-    static Mesh_Writer* GetMeshWriter(string Extension, string Class);
+    static Mesh_Reader* GetMeshReader(string Extension);
+    static Mesh_Writer* GetMeshWriter(string Extension);
 
+  private:
+	static void * getMeshDriver(string Extension, string type);
+	static void * getMeshDocumentDriver(string Extension);
 };
 #endif
diff --git a/src/DriverDAT/DriverDAT_R_SMDS_Mesh.cxx b/src/DriverDAT/DriverDAT_R_SMDS_Mesh.cxx
index bd95f49fb..0990acc5d 100644
--- a/src/DriverDAT/DriverDAT_R_SMDS_Mesh.cxx
+++ b/src/DriverDAT/DriverDAT_R_SMDS_Mesh.cxx
@@ -24,11 +24,21 @@
 //  File   : DriverDAT_R_SMDS_Mesh.cxx
 //  Module : SMESH
 
-using namespace std;
 #include "DriverDAT_R_SMDS_Mesh.h"
-
 #include "utilities.h"
 
+extern "C"
+{
+
+/**
+ * Factory function which will be called by SMESHDriver
+ */
+void * SMESH_createDATMeshReader()
+{
+	return new DriverDAT_R_SMDS_Mesh();
+}
+}
+
 DriverDAT_R_SMDS_Mesh::DriverDAT_R_SMDS_Mesh()
 {
 	;
diff --git a/src/DriverDAT/DriverDAT_W_SMDS_Mesh.cxx b/src/DriverDAT/DriverDAT_W_SMDS_Mesh.cxx
index 9ebe754b3..d99a124fa 100644
--- a/src/DriverDAT/DriverDAT_W_SMDS_Mesh.cxx
+++ b/src/DriverDAT/DriverDAT_W_SMDS_Mesh.cxx
@@ -24,17 +24,25 @@
 //  File   : DriverDAT_W_SMDS_Mesh.cxx
 //  Module : SMESH
 
-using namespace std;
 #include "DriverDAT_W_SMDS_Mesh.h"
-
 #include "SMDS_MeshElement.hxx"
 #include "SMDS_MeshNode.hxx"
-
 #include "utilities.h"
 
+extern "C"
+{
+
+/**
+ * Factory function which will be called by SMESHDriver
+ */
+void * SMESH_createDATMeshWriter()
+{
+	return new DriverDAT_W_SMDS_Mesh();
+}
+}
+
 DriverDAT_W_SMDS_Mesh::DriverDAT_W_SMDS_Mesh()
 {
-	;
 }
 
 DriverDAT_W_SMDS_Mesh::~DriverDAT_W_SMDS_Mesh()
@@ -64,12 +72,12 @@ void DriverDAT_W_SMDS_Mesh::SetMeshId(int aMeshId)
 
 void DriverDAT_W_SMDS_Mesh::Add()
 {
-	;
+	MESSAGE("Adding a mesh to a DAT document. As DAT do not support more than one mesh in a file, the previous mesh is deleted");
+	Write();
 }
 
 void DriverDAT_W_SMDS_Mesh::Write()
 {
-
 	int nbNodes, nbCells;
 	int i;
 
@@ -80,7 +88,7 @@ void DriverDAT_W_SMDS_Mesh::Write()
 		fprintf(stderr, ">> ERREUR : ouverture du fichier %s \n", file2Read);
 		exit(EXIT_FAILURE);
 	}
-	SCRUTE(myMesh);
+
   /****************************************************************************
   *                       NOMBRES D'OBJETS                                    *
   ****************************************************************************/
@@ -97,9 +105,6 @@ void DriverDAT_W_SMDS_Mesh::Write()
 	nb_of_faces = myMesh->NbFaces();
 	nb_of_volumes = myMesh->NbVolumes();
 	nbCells = nb_of_edges + nb_of_faces + nb_of_volumes;
-	SCRUTE(nb_of_edges);
-	SCRUTE(nb_of_faces);
-	SCRUTE(nb_of_volumes);
 
 	fprintf(stdout, "%d %d\n", nbNodes, nbCells);
 	fprintf(myFileId, "%d %d\n", nbNodes, nbCells);
@@ -118,7 +123,8 @@ void DriverDAT_W_SMDS_Mesh::Write()
 		fprintf(myFileId, "%d %e %e %e\n", node->GetID(), node->X(),
 			node->Y(), node->Z());
 	}
-	
+	delete itNodes;
+
   /****************************************************************************
   *                       ECRITURE DES ELEMENTS                                *
   ****************************************************************************/
@@ -127,10 +133,10 @@ void DriverDAT_W_SMDS_Mesh::Write()
 	fprintf(stdout, "(**************************)");
 	/* Ecriture des connectivites, noms, numeros des mailles */
 
-	SMDS_Iterator<const SMDS_MeshEdge *> * itEdges=myMesh->edgesIterator();
+	SMDS_Iterator<const SMDS_MeshEdge*> * itEdges=myMesh->edgesIterator();
 	while(itEdges->more())
 	{
-		const SMDS_MeshElement * elem = itEdges->next();
+		const SMDS_MeshEdge * elem = itEdges->next();
 
 		switch (elem->NbNodes())
 		{
@@ -146,11 +152,13 @@ void DriverDAT_W_SMDS_Mesh::Write()
 		}
 		}
 
-		SMDS_Iterator<const SMDS_MeshElement *> * it=elem->nodesIterator();
-		while(it->more()) fprintf(myFileId, "%d ", it->next()->GetID());
-
+		SMDS_Iterator<const SMDS_MeshElement *> * itNodes=elem->nodesIterator();
+		while(itNodes->more())
+			fprintf(myFileId, "%d ", itNodes->next()->GetID());
+		
 		fprintf(myFileId, "\n");
 	}
+	delete itEdges;
 
 	SMDS_Iterator<const SMDS_MeshFace *> * itFaces=myMesh->facesIterator();
 	while(itFaces->more())
@@ -176,13 +184,16 @@ void DriverDAT_W_SMDS_Mesh::Write()
 		}
 		}
 
-		SMDS_Iterator<const SMDS_MeshElement *> * it=elem->nodesIterator();
-		while(it->more()) fprintf(myFileId, "%d ", it->next()->GetID());
-
+		SMDS_Iterator<const SMDS_MeshElement *> * itNodes=elem->nodesIterator();
+		while(itNodes->more())
+			fprintf(myFileId, "%d ", itNodes->next()->GetID());
+		delete itNodes;
+	
 		fprintf(myFileId, "\n");
 	}
+	delete itFaces;
 
-	SMDS_Iterator<const SMDS_MeshVolume *> * itVolumes=myMesh->volumesIterator();
+	SMDS_Iterator<const SMDS_MeshVolume*> * itVolumes=myMesh->volumesIterator();
 	while(itVolumes->more())
 	{
 		const SMDS_MeshElement * elem = itVolumes->next();
@@ -196,11 +207,14 @@ void DriverDAT_W_SMDS_Mesh::Write()
 		}
 		}
 
-		SMDS_Iterator<const SMDS_MeshElement *> * it=elem->nodesIterator();
-		while(it->more()) fprintf(myFileId, "%d ", it->next()->GetID());
+		SMDS_Iterator<const SMDS_MeshElement *> * itNodes=elem->nodesIterator();
+		while(itNodes->more())
+			fprintf(myFileId, "%d ", itNodes->next()->GetID());
+		delete itNodes;	
 
 		fprintf(myFileId, "\n");
 	}
+	delete itVolumes;
 
 	fclose(myFileId);
 }
diff --git a/src/DriverDAT/Makefile.in b/src/DriverDAT/Makefile.in
index cf3dba921..8043bf715 100644
--- a/src/DriverDAT/Makefile.in
+++ b/src/DriverDAT/Makefile.in
@@ -35,11 +35,23 @@ VPATH=.:@srcdir@
 @COMMENCE@
 
 # header files 
-EXPORT_HEADERS= DriverDAT_R_SMDS_Mesh.h DriverDAT_R_SMESHDS_Mesh.h DriverDAT_R_SMESHDS_Document.h DriverDAT_W_SMDS_Mesh.h DriverDAT_W_SMESHDS_Mesh.h DriverDAT_W_SMESHDS_Document.h 
+EXPORT_HEADERS = \
+	DriverDAT_R_SMDS_Mesh.h \
+	DriverDAT_R_SMESHDS_Mesh.h \
+	DriverDAT_W_SMDS_Mesh.h \
+	DriverDAT_W_SMESHDS_Mesh.h 
+#	DriverDAT_W_SMESHDS_Document.h \
+#	DriverDAT_R_SMESHDS_Document.h \
 
 # Libraries targets
 LIB = libMeshDriverDAT.la
-LIB_SRC = DriverDAT_R_SMDS_Mesh.cxx DriverDAT_R_SMESHDS_Mesh.cxx DriverDAT_R_SMESHDS_Document.cxx DriverDAT_W_SMDS_Mesh.cxx DriverDAT_W_SMESHDS_Mesh.cxx DriverDAT_W_SMESHDS_Document.cxx 
+LIB_SRC = \
+	DriverDAT_R_SMDS_Mesh.cxx \
+	DriverDAT_R_SMESHDS_Mesh.cxx \
+	DriverDAT_W_SMDS_Mesh.cxx \
+	DriverDAT_W_SMESHDS_Mesh.cxx 
+	#DriverDAT_W_SMESHDS_Document.cxx \
+	#DriverDAT_R_SMESHDS_Document.cxx \
 
 LIB_CLIENT_IDL =
 
diff --git a/src/DriverMED/DriverMED_R_SMESHDS_Document.cxx b/src/DriverMED/DriverMED_R_SMESHDS_Document.cxx
index ca50c550e..4949199ab 100644
--- a/src/DriverMED/DriverMED_R_SMESHDS_Document.cxx
+++ b/src/DriverMED/DriverMED_R_SMESHDS_Document.cxx
@@ -31,13 +31,14 @@ using namespace std;
 
 extern "C"
 {
-	Document_Reader *maker()
+	void * SMESH_createMEDDocumentReader()
 	{
 		return new DriverMED_R_SMESHDS_Document;
 	}
 }
 
 DriverMED_R_SMESHDS_Document::DriverMED_R_SMESHDS_Document()
+	:Document_Reader(new DriverMED_R_SMESHDS_Mesh())
 {
 	;
 }
@@ -60,8 +61,6 @@ void DriverMED_R_SMESHDS_Document::Read()
 
 	int myMeshId;
 
-	//string myFile = string("/home/home_users/cai/projects/salome_prev04/SALOME_ROOT/data/fra1.med");
-
 /****************************************************************************
   *                      OUVERTURE DU FICHIER EN LECTURE                      *
   ****************************************************************************/
diff --git a/src/DriverMED/DriverMED_R_SMESHDS_Mesh.cxx b/src/DriverMED/DriverMED_R_SMESHDS_Mesh.cxx
index 1652a55a7..3c1475954 100644
--- a/src/DriverMED/DriverMED_R_SMESHDS_Mesh.cxx
+++ b/src/DriverMED/DriverMED_R_SMESHDS_Mesh.cxx
@@ -31,6 +31,18 @@ using namespace std;
 
 #include <stdlib.h>
 
+extern "C"
+{
+/**
+ * Factory function which will be called by SMESHDriver
+ */
+void * SMESH_createMEDMeshReader()
+{
+	return new DriverMED_R_SMESHDS_Mesh();
+}
+
+}
+
 DriverMED_R_SMESHDS_Mesh::DriverMED_R_SMESHDS_Mesh()
 {
 	myFileId = -1;
diff --git a/src/DriverMED/DriverMED_W_SMESHDS_Mesh.cxx b/src/DriverMED/DriverMED_W_SMESHDS_Mesh.cxx
index 845985436..8b1567f02 100644
--- a/src/DriverMED/DriverMED_W_SMESHDS_Mesh.cxx
+++ b/src/DriverMED/DriverMED_W_SMESHDS_Mesh.cxx
@@ -33,6 +33,18 @@ using namespace std;
 #include <vector>
 #include "utilities.h"
 
+extern "C"
+{
+/**
+ * Factory function which will be called by SMESHDriver
+ */
+void * SMESH_createMEDMeshWriter()
+{
+	return new DriverMED_W_SMESHDS_Mesh();
+}
+
+}
+
 DriverMED_W_SMESHDS_Mesh::DriverMED_W_SMESHDS_Mesh()
 {
 	;
@@ -65,19 +77,7 @@ void DriverMED_W_SMESHDS_Mesh::SetMeshId(int aMeshId)
 
 void DriverMED_W_SMESHDS_Mesh::Write()
 {
-
-	string myClass = string("SMDS_Mesh");
-	string myExtension = string("MED");
-
-	DriverMED_W_SMDS_Mesh *myWriter = new DriverMED_W_SMDS_Mesh;
-
-	myWriter->SetMesh(myMesh);
-	//  myWriter->SetFile(myFile);
-	myWriter->SetMeshId(myMeshId);
-	myWriter->SetFileId(myFileId);
-
-	myWriter->Write();
-
+	Add();
 }
 
 void DriverMED_W_SMESHDS_Mesh::Add()
@@ -520,40 +520,45 @@ void DriverMED_W_SMESHDS_Mesh::Add()
 	{
 		int nbFamillesElts = 0;
 		SMESHDS_Mesh * mySMESHDSMesh = dynamic_cast<SMESHDS_Mesh *>(myMesh);
-		TopTools_IndexedMapOfShape myIndexToShape;
-		TopExp::MapShapes(mySMESHDSMesh->ShapeToMesh(), myIndexToShape);
-
 		map<int,int> mapFamille;
 
-		if (besoinfamilledemaille == 1)
+		if(!mySMESHDSMesh->ShapeToMesh().IsNull())
 		{
-			int t;
-			for (t = 1; t <= myIndexToShape.Extent(); t++)
+			TopTools_IndexedMapOfShape myIndexToShape;
+			TopExp::MapShapes(mySMESHDSMesh->ShapeToMesh(), myIndexToShape);
+
+
+			if (besoinfamilledemaille == 1)
 			{
-				const TopoDS_Shape S = myIndexToShape(t);
-				if (mySMESHDSMesh->HasMeshElements(S))
+				int t;
+				for (t = 1; t <= myIndexToShape.Extent(); t++)
 				{
-					//MESSAGE ("********* Traitement de la Famille "<<-t);
-
-					SMESHDS_SubMesh * SM = mySMESHDSMesh->MeshElements(S);
-					SMDS_Iterator<const SMDS_MeshElement*> * ite=SM->GetElements();
-					bool plein = false;
-					while(ite->more())
-					{
-						mapFamille[ite->next()->GetID()] = -t;
-						plein = true;
-					}
-					if (plein)
+					const TopoDS_Shape S = myIndexToShape(t);
+					if (mySMESHDSMesh->HasMeshElements(S))
 					{
-						nbFamillesElts++;
-						char famille[MED_TAILLE_NOM + 1];
-						sprintf(famille, "E%d", t);
-						CreateFamily(strdup(nommaa), strdup(famille), -t,
-							attvalabs++);
+						//MESSAGE ("********* Traitement de la Famille "<<-t);
+	
+						SMESHDS_SubMesh * SM = mySMESHDSMesh->MeshElements(S);
+						SMDS_Iterator<const SMDS_MeshElement*> * ite=SM->GetElements();
+						bool plein = false;
+						while(ite->more())
+						{
+							mapFamille[ite->next()->GetID()] = -t;
+							plein = true;
+						}
+						if (plein)
+						{
+							nbFamillesElts++;
+							char famille[MED_TAILLE_NOM + 1];
+							sprintf(famille, "E%d", t);
+							CreateFamily(strdup(nommaa), strdup(famille), -t,
+								attvalabs++);
+						}
 					}
 				}
 			}
 		}
+		else besoinfamilledemaille = 0;
 
 		int indice = 1;
 		for (i = 0; i < MED_NBR_GEOMETRIE_MAILLE; i++)
diff --git a/src/DriverMED/Makefile.in b/src/DriverMED/Makefile.in
index 4217426f5..1a5396a8c 100644
--- a/src/DriverMED/Makefile.in
+++ b/src/DriverMED/Makefile.in
@@ -19,12 +19,9 @@
 # 
 #  See http://www.opencascade.org/SALOME/ or email : webmaster.salome@opencascade.org 
 #
-#
-#
 #  File   : Makefile.in
 #  Author : Marc Tajchman (CEA)
 #  Module : SMESH
-#  $Header$
 
 top_srcdir=@top_srcdir@
 top_builddir=../..
@@ -35,18 +32,23 @@ VPATH=.:@srcdir@
 @COMMENCE@
 
 # header files 
-EXPORT_HEADERS= DriverMED_R_SMDS_Mesh.h DriverMED_R_SMESHDS_Mesh.h DriverMED_R_SMESHDS_Document.h DriverMED_W_SMDS_Mesh.h DriverMED_W_SMESHDS_Mesh.h DriverMED_W_SMESHDS_Document.h 
+EXPORT_HEADERS = \
+	DriverMED_R_SMESHDS_Mesh.h \
+	DriverMED_R_SMESHDS_Document.h \
+	DriverMED_R_SMDS_Mesh.h \
+	DriverMED_W_SMESHDS_Mesh.h 
+	#DriverMED_W_SMDS_Mesh.h \
+	#DriverMED_W_SMESHDS_Document.h 
 
 # Libraries targets
 LIB = libMeshDriverMED.la
 LIB_SRC = \
-	DriverMED_R_SMDS_Mesh.cxx \
 	DriverMED_R_SMESHDS_Mesh.cxx \
 	DriverMED_R_SMESHDS_Document.cxx \
-	DriverMED_W_SMDS_Mesh.cxx \
-	DriverMED_W_SMESHDS_Document.cxx \
-	DriverMED_W_SMESHDS_Mesh.cxx
-
+	DriverMED_R_SMDS_Mesh.cxx \
+	DriverMED_W_SMESHDS_Mesh.cxx 
+	#DriverMED_W_SMDS_Mesh.cxx \
+	#DriverMED_W_SMESHDS_Document.cxx 
 LIB_CLIENT_IDL =
 LIB_SERVER_IDL =
 
diff --git a/src/DriverUNV/DriverUNV_R_SMDS_Mesh.cxx b/src/DriverUNV/DriverUNV_R_SMDS_Mesh.cxx
index c6286a7b3..36bba7472 100644
--- a/src/DriverUNV/DriverUNV_R_SMDS_Mesh.cxx
+++ b/src/DriverUNV/DriverUNV_R_SMDS_Mesh.cxx
@@ -3,6 +3,20 @@ using namespace std;
 
 #include "utilities.h"
 
+
+extern "C"
+{
+
+/**
+ * Factory function which will be called by SMESHDriver
+ */
+void * SMESH_createUNVMeshReader()
+{
+	return new DriverUNV_R_SMDS_Mesh();
+}
+
+}
+
 DriverUNV_R_SMDS_Mesh::DriverUNV_R_SMDS_Mesh()
 {
 	;
diff --git a/src/DriverUNV/DriverUNV_W_SMDS_Mesh.cxx b/src/DriverUNV/DriverUNV_W_SMDS_Mesh.cxx
index 01b112baa..a841488f7 100644
--- a/src/DriverUNV/DriverUNV_W_SMDS_Mesh.cxx
+++ b/src/DriverUNV/DriverUNV_W_SMDS_Mesh.cxx
@@ -1,13 +1,7 @@
-using namespace std;
 #include "DriverUNV_W_SMDS_Mesh.h"
-
 #include "SMDS_MeshElement.hxx"
 #include "SMDS_MeshNode.hxx"
 
-
-
-
-
 #include <utilities.h>
 
 #define sNODE_UNV_ID "  2411"
@@ -19,6 +13,19 @@ using namespace std;
 #define sELT_BEAM_DESC1 "%10d        %2d         1         1         7         %1d\n"
 #define sELT_BEAM_DESC2 "         0         1         1\n"
 
+extern "C"
+{
+
+/**
+ * Factory function which will be called by SMESHDriver
+ */
+void * SMESH_createUNVMeshWriter()
+{
+	return new DriverUNV_W_SMDS_Mesh();
+}
+
+}
+
 DriverUNV_W_SMDS_Mesh::DriverUNV_W_SMDS_Mesh()
 {
 	;
@@ -89,7 +96,6 @@ void DriverUNV_W_SMDS_Mesh::Write()
 	SCRUTE(nb_of_volumes);
 
 	fprintf(stdout, "%d %d\n", nbNodes, nbCells);
-	fprintf(myFileId, "%d %d\n", nbNodes, nbCells);
 
   /****************************************************************************
   *                       ECRITURE DES NOEUDS                                 *
diff --git a/src/DriverUNV/Makefile.in b/src/DriverUNV/Makefile.in
index cfb048787..f052db37e 100644
--- a/src/DriverUNV/Makefile.in
+++ b/src/DriverUNV/Makefile.in
@@ -35,18 +35,23 @@ VPATH=.:@srcdir@
 @COMMENCE@
 
 # header files 
-EXPORT_HEADERS= DriverUNV_R_SMDS_Mesh.h DriverUNV_R_SMESHDS_Mesh.h DriverUNV_R_SMESHDS_Document.h \
-                DriverUNV_W_SMDS_Mesh.h DriverUNV_W_SMESHDS_Mesh.h DriverUNV_W_SMESHDS_Document.h 
+EXPORT_HEADERS = \
+	DriverUNV_R_SMDS_Mesh.h \
+	DriverUNV_W_SMDS_Mesh.h 
+	#DriverUNV_W_SMESHDS_Mesh.h \
+	#DriverUNV_W_SMESHDS_Document.h \
+	#DriverUNV_R_SMESHDS_Mesh.h \
+	#DriverUNV_R_SMESHDS_Document.h \
 
 # Libraries targets
 LIB = libMeshDriverUNV.la
 LIB_SRC = \
 	DriverUNV_R_SMDS_Mesh.cxx \
-	DriverUNV_R_SMESHDS_Mesh.cxx \
-	DriverUNV_R_SMESHDS_Document.cxx \
-	DriverUNV_W_SMESHDS_Document.cxx \
-	DriverUNV_W_SMDS_Mesh.cxx \
-	DriverUNV_W_SMESHDS_Mesh.cxx 
+	DriverUNV_W_SMDS_Mesh.cxx 
+	#DriverUNV_W_SMESHDS_Mesh.cxx \
+	#DriverUNV_R_SMESHDS_Mesh.cxx \
+	#DriverUNV_R_SMESHDS_Document.cxx \
+	#DriverUNV_W_SMESHDS_Document.cxx \
 
 LIB_CLIENT_IDL =
 
diff --git a/src/SMESH/SMESH_Gen.cxx b/src/SMESH/SMESH_Gen.cxx
index ec40c71ff..fd5504858 100644
--- a/src/SMESH/SMESH_Gen.cxx
+++ b/src/SMESH/SMESH_Gen.cxx
@@ -30,6 +30,7 @@
 #include "SMESH_subMesh.hxx"
 #include "SMDS_MeshElement.hxx"
 #include "SMDS_MeshNode.hxx"
+#include "SMESHDriver.h"
 
 #include <gp_Pnt.hxx>
 #include <BRep_Tool.hxx>
@@ -404,3 +405,38 @@ int SMESH_Gen::GetShapeDim(const TopoDS_Shape & aShape)
 //   SCRUTE(shapeDim);
 	return shapeDim;
 }
+
+/**
+ * Import a mesh from a file
+ * @param fileName file name to be imported
+ * @param fileType Currently it could be either "DAT", "UNV" or "MED".
+ * @todo
+ */
+SMESH_Mesh * SMESH_Gen::Import(int studyId, const char * fileName,
+	const char * fileType)
+{
+	MESSAGE("SMESH_Gen::Import("<<studyId<<","<<fileName<<","<<fileType<<")");
+
+	// Get studyContext, create it if it does'nt exist, with a SMESHDS_Document
+	StudyContextStruct *myStudyContext = GetStudyContext(studyId);
+
+	// will be used with document
+	/*Document_Reader * reader = SMESHDriver::GetDocumentReader(string(fileType));
+	reader->SetDocument(myStudyContext->myDocument);
+	reader->SetFile(string(fileName));
+	reader->Read();*/
+	// currently we only read one mesh from a file (limitation on MED files).
+
+	// create a new SMESH_mesh object 
+	SMESH_Mesh *mesh = new SMESH_Mesh(_localId++, studyId, this,
+		myStudyContext->myDocument);
+	myStudyContext->mapMesh[_localId] = mesh;
+	
+	Mesh_Reader * reader = SMESHDriver::GetMeshReader(string(fileType));
+	reader->SetMesh(mesh->GetMeshDS());
+	reader->SetFile(string(fileName));
+	reader->Read();
+	
+	return mesh;
+}
+
diff --git a/src/SMESH/SMESH_Gen.hxx b/src/SMESH/SMESH_Gen.hxx
index 5443c0e4c..70f17f506 100644
--- a/src/SMESH/SMESH_Gen.hxx
+++ b/src/SMESH/SMESH_Gen.hxx
@@ -69,7 +69,8 @@ class SMESH_Gen
 
 	static int GetShapeDim(const TopoDS_Shape & aShape);
 	SMESH_Algo *GetAlgo(SMESH_Mesh & aMesh, const TopoDS_Shape & aShape);
-
+	SMESH_Mesh *Import(int studyId, const char * fileName, const char * fileType);
+ 
 	// inherited methods from SALOMEDS::Driver
 
 	void Save(int studyId, const char *aUrlOfFile);
diff --git a/src/SMESH/SMESH_Mesh.cxx b/src/SMESH/SMESH_Mesh.cxx
index 82f24dddf..a25911730 100644
--- a/src/SMESH/SMESH_Mesh.cxx
+++ b/src/SMESH/SMESH_Mesh.cxx
@@ -32,13 +32,8 @@
 #include "SMESH_Hypothesis.hxx"
 #include "SMESHDS_Script.hxx"
 #include "SMDS_MeshVolume.hxx"
-
 #include "utilities.h"
-
-#include "Mesh_Writer.h"
-#include "DriverMED_W_SMESHDS_Mesh.h"
-#include "DriverDAT_W_SMESHDS_Mesh.h"
-#include "DriverUNV_W_SMESHDS_Mesh.h"
+#include "SMESHDriver.h"
 
 #include <TCollection_AsciiString.hxx>
 
@@ -415,37 +410,22 @@ throw(SALOME_Exception)
 	return _subMeshesUsingHypothesisList;
 }
 
-//=============================================================================
 /*!
- *
+ * Export mesh to a file
+ * @param fileName file name where to export the file
+ * @param fileType Currently it could be either "DAT", "UNV" or "MED".
  */
-//=============================================================================
-
-void SMESH_Mesh::ExportMED(const char *file) throw(SALOME_Exception)
-{
-	Mesh_Writer *myWriter = new DriverMED_W_SMESHDS_Mesh;
-	myWriter->SetFile(string(file));
-	myWriter->SetMesh(_myMeshDS);
-	MESSAGE(" _idDoc " << _idDoc) myWriter->SetMeshId(_idDoc);
-	myWriter->Add();
-}
-
-void SMESH_Mesh::ExportDAT(const char *file) throw(SALOME_Exception)
-{
-	Mesh_Writer *myWriter = new DriverDAT_W_SMESHDS_Mesh;
-	myWriter->SetFile(string(file));
-	myWriter->SetMesh(_myMeshDS);
-	myWriter->SetMeshId(_idDoc);
-	myWriter->Add();
-}
-
-void SMESH_Mesh::ExportUNV(const char *file) throw(SALOME_Exception)
+void SMESH_Mesh::Export(const char *fileName, const char *fileType)
+	throw(SALOME_Exception)
 {
-	Mesh_Writer *myWriter = new DriverUNV_W_SMESHDS_Mesh;
-	myWriter->SetFile(string(file));
-	myWriter->SetMesh(_myMeshDS);
-	myWriter->SetMeshId(_idDoc);
-	myWriter->Add();
+	MESSAGE("SMESH_Mesh::Export("<<fileName<<","<<fileType<<")");
+	Mesh_Writer * writer = SMESHDriver::GetMeshWriter(string(fileType));
+	if(writer!=NULL)
+	{
+		writer->SetMesh(GetMeshDS());
+		writer->SetFile(string(fileName));
+		writer->Write();
+	}
 }
 
 //=============================================================================
diff --git a/src/SMESH/SMESH_Mesh.hxx b/src/SMESH/SMESH_Mesh.hxx
index f179f68dc..fbda43b02 100644
--- a/src/SMESH/SMESH_Mesh.hxx
+++ b/src/SMESH/SMESH_Mesh.hxx
@@ -101,9 +101,8 @@ class SMESH_Mesh
 		GetSubMeshUsingHypothesis(SMESHDS_Hypothesis * anHyp)
 		throw(SALOME_Exception);
 
-	void ExportDAT(const char *file) throw(SALOME_Exception);
-	void ExportMED(const char *file) throw(SALOME_Exception);
-	void ExportUNV(const char *file) throw(SALOME_Exception);
+	void Export(const char *fileName, const char *fileType)
+		throw(SALOME_Exception);
 
 	int NbNodes() throw(SALOME_Exception);
 
diff --git a/src/SMESHGUI/Makefile.in b/src/SMESHGUI/Makefile.in
index 660789e06..6f6c98f5b 100644
--- a/src/SMESHGUI/Makefile.in
+++ b/src/SMESHGUI/Makefile.in
@@ -126,6 +126,6 @@ CPPFLAGS += $(QT_INCLUDES) $(VTK_INCLUDES) $(OGL_INCLUDES) $(OCC_INCLUDES) $(PYT
 CXXFLAGS += -I${KERNEL_ROOT_DIR}/include/salome -I${GEOM_ROOT_DIR}/include/salome
 #$(OCC_CXXFLAGS)
 
-LDFLAGS += -lOCCViewer -lVTKViewer -lSalomeObject -lSalomeGUI -lSMESHObject -lSMDS -lSMESHDS -lSMESHFiltersSelection -lGEOMClient -lMeshDriverDAT -lMeshDriverMED -lMeshDriverUNV $(OCC_KERNEL_LIBS) -L${KERNEL_ROOT_DIR}/lib/salome -L${GEOM_ROOT_DIR}/lib/salome
+LDFLAGS += -lOCCViewer -lVTKViewer -lSalomeObject -lSalomeGUI -lSMESHObject -lSMDS -lSMESHDS -lSMESHFiltersSelection -lGEOMClient $(OCC_KERNEL_LIBS) -L${KERNEL_ROOT_DIR}/lib/salome -L${GEOM_ROOT_DIR}/lib/salome
 
 @CONCLUDE@
diff --git a/src/SMESHGUI/SMESHGUI.cxx b/src/SMESHGUI/SMESHGUI.cxx
index 5f56add8f..47bb68559 100644
--- a/src/SMESHGUI/SMESHGUI.cxx
+++ b/src/SMESHGUI/SMESHGUI.cxx
@@ -87,26 +87,6 @@ using namespace std;
 #include "SALOMEGUI_QtCatchCorbaException.hxx"
 #include "utilities.h"
 
-#include "SMDS_Mesh.hxx"
-#include "SMESHDS_Document.hxx"
-#include "Document_Reader.h"
-#include "Document_Writer.h"
-#include "Mesh_Reader.h"
-#include "Mesh_Writer.h"
-
-#include "DriverDAT_R_SMESHDS_Document.h"
-#include "DriverMED_R_SMESHDS_Document.h"
-#include "DriverUNV_R_SMESHDS_Document.h"
-#include "DriverDAT_W_SMESHDS_Document.h"
-#include "DriverMED_W_SMESHDS_Document.h"
-#include "DriverUNV_W_SMESHDS_Document.h"
-#include "DriverDAT_R_SMESHDS_Mesh.h"
-#include "DriverMED_R_SMESHDS_Mesh.h"
-#include "DriverUNV_R_SMESHDS_Mesh.h"
-#include "DriverDAT_W_SMESHDS_Mesh.h"
-#include "DriverMED_W_SMESHDS_Mesh.h"
-#include "DriverUNV_W_SMESHDS_Mesh.h"
-
 // QT Includes
 #define	 INCLUDE_MENUITEM_DEF
 #include <qapplication.h>
@@ -237,8 +217,6 @@ SMESHGUI *SMESHGUI::GetOrCreateSMESHGUI(QAD_Desktop * desktop)
 		smeshGUI->myStudyAPI =
 			SMESHGUI_StudyAPI(smeshGUI->myStudy, smeshGUI->myComponentMesh);
 
-		smeshGUI->myDocument = new SMESHDS_Document(1);	//NBU
-
 		smeshGUI->mySimulationActors = vtkActorCollection::New();
 		smeshGUI->mySimulationActors2D = vtkActor2DCollection::New();
 	}
@@ -2104,8 +2082,7 @@ bool SMESHGUI::OnGUIEvent(int theCommandID, QAD_Desktop * parent)
 	case 112:
 	case 111:
 	{
-		Import_Document(parent, theCommandID);	//NBU
-		//Import_Mesh(parent,theCommandID);
+		smeshGUI->Import_Document(parent, theCommandID);
 		break;
 	}
 
@@ -3498,58 +3475,6 @@ SALOMEDS::Study::ListOfSObject *
 	return listSOmesh._retn();
 }
 
-//=============================================================================
-/*!
- *
- */
-//=============================================================================
-void SMESHGUI::Import_Mesh(QAD_Desktop * parent, int theCommandID)
-{
-	QString filter;
-	string myExtension;
-	Mesh_Reader *myReader;
-
-	if (theCommandID == 113)
-	{
-		filter = tr("MED files (*.med)");
-		myExtension = string("MED");
-		myReader = new DriverMED_R_SMESHDS_Mesh;
-	}
-	else if (theCommandID == 112)
-	{
-		filter = tr("IDEAS files (*.unv)");
-		myExtension = string("UNV");
-	}
-	else if (theCommandID == 111)
-	{
-		filter = tr("DAT files (*.dat)");
-		myExtension = string("MED");
-		myReader = new DriverDAT_R_SMESHDS_Mesh;
-	}
-
-	QString filename = QAD_FileDlg::getFileName(parent,
-		"",
-		filter,
-		tr("Import mesh"),
-		true);
-	if (!filename.isEmpty())
-	{
-		QApplication::setOverrideCursor(Qt::waitCursor);
-		string myClass = string("SMESHDS_Mesh");
-//    Mesh_Reader* myReader = SMESHDriver::GetMeshReader(myExtension, myClass);
-
-		int myMeshId = (smeshGUI->myDocument)->NewMesh();
-		SMDS_Mesh *myMesh = (smeshGUI->myDocument)->GetMesh(myMeshId);
-
-		myReader->SetFile(string(filename.latin1()));
-		myReader->SetMesh(myMesh);
-		myReader->SetMeshId(myMeshId);
-		myReader->Read();
-
-		QApplication::restoreOverrideCursor();
-	}
-}
-
 //=============================================================================
 /*!
  *
@@ -3577,7 +3502,7 @@ void SMESHGUI::Export_Mesh(QAD_Desktop * parent, int theCommandID)
 				if (!filename.isEmpty())
 				{
 					QApplication::setOverrideCursor(Qt::waitCursor);
-					aMesh->ExportMED(filename.latin1());
+					aMesh->Export(filename.latin1(), "MED");
 					QApplication::restoreOverrideCursor();
 				}
 			}
@@ -3591,7 +3516,7 @@ void SMESHGUI::Export_Mesh(QAD_Desktop * parent, int theCommandID)
 				if (!filename.isEmpty())
 				{
 					QApplication::setOverrideCursor(Qt::waitCursor);
-					aMesh->ExportDAT(filename.latin1());
+					aMesh->Export(filename.latin1(), "DAT");
 					QApplication::restoreOverrideCursor();
 				}
 			}
@@ -3605,11 +3530,11 @@ void SMESHGUI::Export_Mesh(QAD_Desktop * parent, int theCommandID)
 				if (!filename.isEmpty())
 				{
 					QApplication::setOverrideCursor(Qt::waitCursor);
-					aMesh->ExportUNV(filename.latin1());
+					aMesh->Export(filename.latin1(), "UNV");
 					QApplication::restoreOverrideCursor();
 				}
 				else
-					aMesh->ExportDAT(filename.latin1());
+					aMesh->Export(filename.latin1(), "DAT");
 
 				QApplication::restoreOverrideCursor();
 
@@ -3642,90 +3567,49 @@ void SMESHGUI::Import_Document(QAD_Desktop * parent, int theCommandID)
 {
 	QString filter;
 	string myExtension;
-	Document_Reader *myReader;
 
 	if (theCommandID == 113)
 	{
 		filter = tr("MED files (*.med)");
 		myExtension = string("MED");
-		myReader = new DriverMED_R_SMESHDS_Document;
 	}
 	else if (theCommandID == 112)
 	{
 		filter = tr("IDEAS files (*.unv)");
 		myExtension = string("UNV");
-		myReader = new DriverUNV_R_SMESHDS_Document;
 	}
 	else if (theCommandID == 111)
 	{
 		filter = tr("DAT files (*.dat)");
 		myExtension = string("DAT");
-		myReader = new DriverDAT_R_SMESHDS_Document;
 	}
 
-	QString filename = QAD_FileDlg::getFileName(parent,
-		"",
-		filter,
-		tr("Import document"),
-		true);
-	if (!filename.isEmpty())
-	{
-		QApplication::setOverrideCursor(Qt::waitCursor);
-		string myClass = string("SMESHDS_Document");
-//    Document_Reader* myReader = SMESHDriver::GetDocumentReader(myExtension, myClass);
-		SMESHDS_Document *newDocument = new SMESHDS_Document(1);
-
-		myReader->SetFile(string(filename.latin1()));
-		myReader->SetDocument(smeshGUI->myDocument);
-		myReader->Read();
-		QApplication::restoreOverrideCursor();
-	}
-}
-
-void SMESHGUI::Export_Document(QAD_Desktop * parent, int theCommandID)
-{
-	QString filter;
-	Document_Writer *myWriter;
-	string myExtension;
-
-	if (theCommandID == 122)
-	{
-		filter = tr("MED files (*.med)");
-		myExtension = string("MED");
-		myWriter = new DriverMED_W_SMESHDS_Document;
-	}
-	else if (theCommandID == 121)
-	{
-		filter = tr("DAT files (*.dat)");
-		myExtension = string("DAT");
-		myWriter = new DriverDAT_W_SMESHDS_Document;
-	}
-	else if (theCommandID == 123)
-	{
-		filter = tr("IDEAS files (*.unv)");
-		myExtension = string("UNV");
-		myWriter = new DriverUNV_W_SMESHDS_Document;
-	}
+	QString filename = QAD_FileDlg::getFileName(parent, "", filter,
+		tr("Import document"), true);
 
-	QString filename = QAD_FileDlg::getFileName(parent,
-		"",
-		filter,
-		tr("Export document"),
-		false);
 	if (!filename.isEmpty())
 	{
 		QApplication::setOverrideCursor(Qt::waitCursor);
-		string myClass = string("SMESHDS_Document");
-		//Document_Writer* myWriter = SMESHDriver::GetDocumentWriter(myExtension, myClass);
-
-		myWriter->SetFile(string(filename.latin1()));
-		myWriter->SetDocument(smeshGUI->myDocument);
-
-		//StudyContextStruct* myStudyContext = _impl.GetStudyContext(myStudyId);
-		//Handle(SMESHDS_Document) myDocument = myStudyContext->myDocument;
-		//myWriter->SetDocument(myDocument);
-
-		myWriter->Write();
+		try
+		{
+			if (!myComponentMesh->_is_nil())
+			{
+				SMESH::SMESH_Mesh_var aMesh =
+					myComponentMesh->Import(myStudyId, filename.latin1(),
+					myExtension.c_str());
+	
+				if (!aMesh->_is_nil())
+				{
+					SALOMEDS::SObject_var SM = myStudyAPI.AddNewMesh(aMesh);
+					myStudyAPI.SetName(SM, filename);
+				}
+			}
+		}
+		catch(const SALOME::SALOME_Exception & S_ex)
+		{
+			QtCatchCorbaException(S_ex);
+		}
+		myActiveStudy->updateObjBrowser(true);
 		QApplication::restoreOverrideCursor();
 	}
 }
diff --git a/src/SMESHGUI/SMESHGUI.h b/src/SMESHGUI/SMESHGUI.h
index ee29287bf..fdcbe7cda 100644
--- a/src/SMESHGUI/SMESHGUI.h
+++ b/src/SMESHGUI/SMESHGUI.h
@@ -88,8 +88,6 @@ private :
 
   //  vtkScalarBarActor*    myScalarBar;
 
-  SMESHDS_Document *        myDocument;//NBU
-
   bool                      myAutomaticUpdate;
 
 public :
@@ -303,9 +301,7 @@ public :
   static void setOrb();
 
   /* Import/Export */ //NBU
-  static void Import_Document(QAD_Desktop* parent, int theCommandID);
-  static void Export_Document(QAD_Desktop* parent, int theCommandID);
-  static void Import_Mesh(QAD_Desktop* parent, int theCommandID);
+  void Import_Document(QAD_Desktop* parent, int theCommandID);
   static void Export_Mesh(QAD_Desktop* parent, int theCommandID);
 
 signals:
diff --git a/src/SMESH_I/SMESH_Gen_i.cxx b/src/SMESH_I/SMESH_Gen_i.cxx
index b55ed358b..e9dcc0ffe 100644
--- a/src/SMESH_I/SMESH_Gen_i.cxx
+++ b/src/SMESH_I/SMESH_Gen_i.cxx
@@ -55,14 +55,7 @@ using namespace std;
 #include "SMESH_MaxElementArea_i.hxx"
 #include "SMESH_MaxElementVolume_i.hxx"
 
-#include "SMESHDS_Document.hxx"
-
-#include "Document_Reader.h"
-#include "DriverMED_W_SMESHDS_Mesh.h"
-#include "DriverMED_R_SMESHDS_Mesh.h"
-#include "DriverMED_R_SMESHDS_Document.h"
-#include "DriverUNV_R_SMESHDS_Document.h"
-#include "DriverDAT_R_SMESHDS_Document.h"
+#include "SMESHDriver.h"
 
 #include "Utils_CorbaException.hxx"
 #include "utilities.h"
@@ -580,11 +573,11 @@ SALOMEDS::TMPFile* SMESH_Gen_i::Save(SALOMEDS::SComponent_ptr theComponent,
 	SMESHDS_Mesh* mySMESHDSMesh = myLocMesh.GetMeshDS();
 	
 	SCRUTE(mySMESHDSMesh->NbNodes());
-	if (mySMESHDSMesh->NbNodes()>0) {//checks if the mesh is not empty
-	  
-	  DriverMED_W_SMESHDS_Mesh* myWriter = new DriverMED_W_SMESHDS_Mesh;
+	if (mySMESHDSMesh->NbNodes()>0)
+	{
+	  //checks if the mesh is not empty	  
+	  Mesh_Writer * myWriter = SMESHDriver::GetMeshWriter("MED");
 	  myWriter->SetFile(meshfile.ToCString());
-	  
 	  myWriter->SetMesh(mySMESHDSMesh);
 	  myWriter->SetMeshId(gotBranch->Tag());
 	  myWriter->Add();
@@ -1134,47 +1127,22 @@ bool SMESH_Gen_i::Load(SALOMEDS::SComponent_ptr theComponent,
 				
 	  //********** 
 	  //********** Loading of mesh data
-	  if (strcmp(datafilename,"No data")!=0) {
-		  
-	    med_idt fid;
+	  if (strcmp(datafilename,"No data")!=0)
+	  {
 	    int ret;
-	    
-	    //****************************************************************************
-	    //*                      OUVERTURE DU FICHIER EN LECTURE                      *
-	    //****************************************************************************
-		  
-	    fid = MEDouvrir(datafilename,MED_LECT);
-	    if (fid < 0)
-	      {
-		printf(">> ERREUR : ouverture du fichier %s \n",datafilename);
-		exit(EXIT_FAILURE);
-	      }
-	    else {
-		    
-	      StudyContext_iStruct* myStudyContext = _mapStudyContext_i[studyId];
-	      int meshId = myNewMesh->GetId();
-	      SMESH_Mesh_i* meshServant = myStudyContext->mapMesh_i[meshId];
-	      ::SMESH_Mesh& myLocMesh = meshServant->GetImpl();
-	      SMESHDS_Mesh* mySMESHDSMesh = myLocMesh.GetMeshDS();
-		    
-	      DriverMED_R_SMESHDS_Mesh* myReader = new DriverMED_R_SMESHDS_Mesh;
-		    
-	      myReader->SetMesh(mySMESHDSMesh);
-	      myReader->SetMeshId(myMeshId);
-	      myReader->SetFileId(fid);
-	      myReader->ReadMySelf();
-	      //SCRUTE(mySMESHDSMesh->NbNodes());
-	      //myNewMesh->ExportUNV("/tmp/test.unv");//only to check out
-		    
-	      //****************************************************************************
-	      //*                      FERMETURE DU FICHIER                                 *
-	      //****************************************************************************
-	      ret = MEDfermer(fid);
-		    
-	      if (ret != 0)
-		printf(">> ERREUR : erreur a la fermeture du fichier %s\n",datafilename);
-		    
-	    }
+	    StudyContext_iStruct* myStudyContext = _mapStudyContext_i[studyId];
+	    int meshId = myNewMesh->GetId();
+	    SMESH_Mesh_i* meshServant = myStudyContext->mapMesh_i[meshId];
+	    ::SMESH_Mesh& myLocMesh = meshServant->GetImpl();
+	    SMESHDS_Mesh* mySMESHDSMesh = myLocMesh.GetMeshDS();
+
+	    Mesh_Reader* myReader = SMESHDriver::GetMeshReader("MED");
+	    myReader->SetMesh(mySMESHDSMesh);
+	    myReader->SetMeshId(myMeshId);
+	    myReader->SetFile(datafilename);
+	    myReader->Read();
+	    //SCRUTE(mySMESHDSMesh->NbNodes());
+	    //myNewMesh->ExportUNV("/tmp/test.unv");//only to check out
 	  }
 	}
 	//********** 
@@ -1735,6 +1703,46 @@ SMESH_topo* SMESH_Gen_i::ExploreMainShape(GEOM::GEOM_Gen_ptr geomEngine,
   return myTopo;
 }
       
+/**
+ * Import a mesh from a file
+ * @param fileName file name to be imported
+ * @param fileType Currently it could be either "DAT", "UNV" or "MED".
+ */
+SMESH::SMESH_Mesh_ptr SMESH_Gen_i::Import(CORBA::Long studyId,
+	const char* fileName, const char* fileType)
+{
+	MESSAGE("SMESH_Gen_I::Import");
+	SMESH_Mesh_i* meshServant;
+	try
+	{
+		if (_mapStudyContext_i.find(studyId) == _mapStudyContext_i.end())
+		{
+			_mapStudyContext_i[studyId] = new StudyContext_iStruct;      
+		}
+		StudyContext_iStruct* myStudyContext = _mapStudyContext_i[studyId];
+
+		// create a new mesh object servant, store it in a map in study context
+		meshServant = new SMESH_Mesh_i(this, NULL, studyId, _localId);
+		myStudyContext->mapMesh_i[_localId] = meshServant;
+		_localId++;
+
+		// create a new mesh object
+		meshServant->SetImpl(_impl.Import(studyId, fileName, fileType));
+	}
+	catch (SALOME_Exception& S_ex)
+	{
+		THROW_SALOME_CORBA_EXCEPTION(S_ex.what(), SALOME::BAD_PARAM);
+	}
+
+	// activate the CORBA servant of Mesh
+
+	SMESH::SMESH_Mesh_var mesh
+		= SMESH::SMESH_Mesh::_narrow(meshServant->_this());
+  
+	meshServant->SetIor(mesh);
+	return SMESH::SMESH_Mesh::_duplicate(mesh);
+}
+
 //=============================================================================
 /*! 
  * C factory, accessible with dlsym, after dlopen  
diff --git a/src/SMESH_I/SMESH_Gen_i.hxx b/src/SMESH_I/SMESH_Gen_i.hxx
index 1a0453285..4b9548e95 100644
--- a/src/SMESH_I/SMESH_Gen_i.hxx
+++ b/src/SMESH_I/SMESH_Gen_i.hxx
@@ -96,6 +96,8 @@ public:
                                    const SMESH::shape_array& listOfSubShape)
     throw (SALOME::SALOME_Exception);
 
+	SMESH::SMESH_Mesh_ptr Import(CORBA::Long studyId, const char* fileName,
+		const char* fileType);
 
   // inherited methods from SALOMEDS::Driver
 
diff --git a/src/SMESH_I/SMESH_Mesh_i.cxx b/src/SMESH_I/SMESH_Mesh_i.cxx
index 9dee0f562..7a2ffaa99 100644
--- a/src/SMESH_I/SMESH_Mesh_i.cxx
+++ b/src/SMESH_I/SMESH_Mesh_i.cxx
@@ -530,25 +530,6 @@ SMESH::SMESH_MeshEditor_ptr SMESH_Mesh_i::GetMeshEditor()
  */
 //=============================================================================
 
-void SMESH_Mesh_i::ExportMED(const char *file) throw(SALOME::SALOME_Exception)
-{
-	_impl->ExportMED(file);
-}
-void SMESH_Mesh_i::ExportDAT(const char *file) throw(SALOME::SALOME_Exception)
-{
-	_impl->ExportDAT(file);
-}
-void SMESH_Mesh_i::ExportUNV(const char *file) throw(SALOME::SALOME_Exception)
-{
-	_impl->ExportUNV(file);
-}
-
-//=============================================================================
-/*!
- *  
- */
-//=============================================================================
-
 SALOME_MED::MESH_ptr SMESH_Mesh_i::GetMEDMesh()throw(SALOME::SALOME_Exception)
 {
 	SMESH_MEDMesh_i *aMedMesh = new SMESH_MEDMesh_i(this);
@@ -625,3 +606,14 @@ CORBA::Long SMESH_Mesh_i::NbSubMesh()throw(SALOME::SALOME_Exception)
 {
 	return _impl->NbSubMesh();
 }
+
+/*!
+ * Export mesh to a file
+ * @param fileName file name where to export the file
+ * @param fileType Currently it could be either "DAT", "UNV" or "MED".
+ */
+void SMESH_Mesh_i::Export(const char* fileName, const char* fileType)
+	throw (SALOME::SALOME_Exception)
+{
+	_impl->Export(fileName, fileType);
+}
diff --git a/src/SMESH_I/SMESH_Mesh_i.hxx b/src/SMESH_I/SMESH_Mesh_i.hxx
index ca631431e..74a03a75b 100644
--- a/src/SMESH_I/SMESH_Mesh_i.hxx
+++ b/src/SMESH_I/SMESH_Mesh_i.hxx
@@ -91,6 +91,9 @@ public:
   CORBA::Long GetStudyId()
     throw (SALOME::SALOME_Exception);
 
+  void Export(const char* fileName, const char* fileType)
+	throw (SALOME::SALOME_Exception);
+
   // --- C++ interface
 
   void SetImpl(::SMESH_Mesh* impl);
@@ -100,13 +103,6 @@ public:
   void SetIor(SMESH::SMESH_Mesh_ptr myIor);
   SMESH::SMESH_Mesh_ptr GetIor();
 
-  void ExportMED( const char* file )
-    throw (SALOME::SALOME_Exception);
-  void ExportDAT( const char* file )
-    throw (SALOME::SALOME_Exception);
-  void ExportUNV( const char* file )
-    throw (SALOME::SALOME_Exception);
-
   SALOME_MED::MESH_ptr GetMEDMesh()
     throw (SALOME::SALOME_Exception);