X-Git-Url: https://git.creatis.insa-lyon.fr/pubgit/?a=blobdiff_plain;f=kernel%2Fsrc%2FbbtkPackage.cxx;h=91cdb518372b220f124b1de33af8dc5c22c8912a;hb=12f2166f201f4e5a99c9c7876dadd09da81bfb51;hp=b24272152df64d0fa61b3a7d90c45efe5289823e;hpb=c2a4b1893412e50a3d9abff221938a2d16c4a7cb;p=bbtk.git

diff --git a/kernel/src/bbtkPackage.cxx b/kernel/src/bbtkPackage.cxx
index b242721..91cdb51 100644
--- a/kernel/src/bbtkPackage.cxx
+++ b/kernel/src/bbtkPackage.cxx
@@ -1,25 +1,47 @@
-/*=========================================================================
-                                                                                
+/*
+ # ---------------------------------------------------------------------
+ #
+ # Copyright (c) CREATIS (Centre de Recherche en Acquisition et Traitement de l'Image
+ #                        pour la SantÈ)
+ # Authors : Eduardo Davila, Frederic Cervenansky, Claire Mouton
+ # Previous Authors : Laurent Guigues, Jean-Pierre Roux
+ # CreaTools website : www.creatis.insa-lyon.fr/site/fr/creatools_accueil
+ #
+ #  This software is governed by the CeCILL-B license under French law and
+ #  abiding by the rules of distribution of free software. You can  use,
+ #  modify and/ or redistribute the software under the terms of the CeCILL-B
+ #  license as circulated by CEA, CNRS and INRIA at the following URL
+ #  http://www.cecill.info/licences/Licence_CeCILL-B_V1-en.html
+ #  or in the file LICENSE.txt.
+ #
+ #  As a counterpart to the access to the source code and  rights to copy,
+ #  modify and redistribute granted by the license, users are provided only
+ #  with a limited warranty  and the software's author,  the holder of the
+ #  economic rights,  and the successive licensors  have only  limited
+ #  liability.
+ #
+ #  The fact that you are presently reading this means that you have had
+ #  knowledge of the CeCILL-B license and that you accept its terms.
+ # ------------------------------------------------------------------------ */
+
+
+
+/*=========================================================================                                                                               
   Program:   bbtk
   Module:    $RCSfile: bbtkPackage.cxx,v $
   Language:  C++
-  Date:      $Date: 2008/04/09 11:16:57 $
-  Version:   $Revision: 1.12 $
-                                                                                
-  Copyright (c) CREATIS (Centre de Recherche et d'Applications en Traitement de
-  l'Image). All rights reserved. See doc/license.txt or
-  http://www.creatis.insa-lyon.fr/Public/bbtk/License.html for details.
-                                                                                
-     This software is distributed WITHOUT ANY WARRANTY; without even
-     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
-     PURPOSE.  See the above copyright notices for more information.
-                                                                                
+  Date:      $Date: 2012/11/16 08:49:01 $
+  Version:   $Revision: 1.37 $
 =========================================================================*/
+
+
+
 /**
  *\file
  *\brief Class bbtk::Package : registers black boxes descriptors and is able to create instances of the black boxes registered.
  */
 #include "bbtkPackage.h"
+#include "bbtkComplexBlackBoxDescriptor.h"
 #include "bbtkMessageManager.h"
 #include "bbtkConfigurationFile.h"
 #include <fstream>
@@ -28,20 +50,45 @@
 
 namespace bbtk
 {
+  
+
+
+  //==========================================================================
+  /// Creates a new package
+  Package::Pointer Package::New(const std::string& name,
+				const std::string& author,
+				const std::string& description,
+				const std::string& version) 
+  {
+    bbtkDebugMessage("object",1,"##> Package::New('"<<name<<"',...)"
+		     <<bbtkendl);
+    Package::Pointer p = MakePointer(new Package(name,
+					       author,
+					       description,
+					       version));
+    bbtkDebugMessage("object",2,"<## Package::New('"<<name<<"',...)"
+		     <<bbtkendl);
+    return p;
+  }
+  //==========================================================================
+
   //==========================================================================
   /// Ctor with the name of the package
   Package::Package(const std::string& name,
 		   const std::string& author,
 		   const std::string& description,
-		   const std::string& version,
-		   const std::string& BBTKVersion) 
+		   const std::string& version) 
     :
+    mDynamicLibraryHandler(0),
     mName(name),
     mAuthor(author),
     mDescription(description),
-    mVersion(version),
-    mBBTKVersion(BBTKVersion)
+    mVersion(version)
   {
+
+    bbtkDebugMessage("object",2,"==> Package('"<<name<<"',...)"
+		     <<bbtkendl);
+
     std::string default_doc_dir = ConfigurationFile::GetInstance().Get_default_temp_dir();
     char c = default_doc_dir.c_str()[strlen(default_doc_dir.c_str())-1];
     std::string url = default_doc_dir; 
@@ -62,7 +109,9 @@ namespace bbtk
 
     //    std::cout  << "   url=["<<url<<"]"<<std::endl;
     //    std::cout  << "relurl=["<<relurl<<"]"<<std::endl;
-    bbtkDebugMessage("Kernel",7,"Package::Package(\""<<name<<"\")"<<bbtkendl);
+    bbtkDebugMessage("object",2,"<== Package::Package('"<<name<<"',...) OK"
+		     <<bbtkendl);
+
   }
   //==========================================================================
 
@@ -72,45 +121,592 @@ namespace bbtk
   /// Dtor
   Package::~Package()
   {
-    bbtkDebugMessageInc("Kernel",7,"Package::~Package(\""<<mName<<"\")"<<bbtkendl);
-    BlackBoxMapType::const_iterator i;
-    for (i=mBlackBoxMap.begin();
-         i!=mBlackBoxMap.end();
-       ++i) 
-     {
-       i->second->UnReference();
-     } 
-    // Adaptors are also stored in the black box map : hence already deleted
+    bbtkDebugMessage("object",2,"==> ~Package(\""<<mName<<"\")"<<bbtkendl);
+  }
+  //==========================================================================
+
+
+  //==========================================================================
+  void PackageReleaseBlackBoxDescriptorInternal(Package::WeakPointer pack,
+						const std::string& descname)
+  {
+    // Try to release descriptor
+    std::string packname = pack.lock()->GetName();
+    
+    bbtkDebugMessage("package",5,"--- Releasing descriptor '"
+		     <<packname<<"::"<<descname<<"'"<<bbtkendl);
+    
+    
+    Package::DescriptorMapType::iterator desc = 
+      pack.lock()->GetDescriptorMap().find(descname);
+    if (desc ==  pack.lock()->GetDescriptorMap().end())
+      {
+	bbtkDebugMessage("package",5,
+			 "    Descriptor has already been released"
+			<<bbtkendl);
+	return;
+		  }
+    //    bbtkDebugMessage("package",3,
+    //		     "    Trying unreferencing it ... "<<std::endl);
+    BlackBoxDescriptor::WeakPointer pdesc = desc->second;
+    desc->second.reset();
+    // if it is dead : remove it 
+    if (pdesc.expired()) 
+      {
+	bbtkDebugMessage("package",2," ==> '"<<packname<<"::"<<descname<<"' Descriptor expired"<<bbtkendl);
+	if (pack.expired()) 
+	  {
+	    bbtkDebugMessage("package",2,
+                             "     ... and caused its package death"
+			     <<bbtkendl);
+	    return;
+	  } // pack.expired
+	desc = pack.lock()->GetDescriptorMap().find(descname);
+	if (desc !=  pack.lock()->GetDescriptorMap().end())	  pack.lock()->GetDescriptorMap().erase(desc);
+      }   else    {  //pdesc.expired
+      bbtkDebugMessage("package",5,"    ... Descriptor still alive ("
+		       <<pdesc.use_count()<<" refs)"
+		       <<bbtkendl);
+      pack.lock()->GetDescriptorMap()[descname] = pdesc.lock();
+    } // pdesc.expired
+  }
+  //==========================================================================
+
+
+  //==========================================================================
+  /// Release
+  void Package::Release(Package::WeakPointer pack)
+  {
+    std::string packname = pack.lock()->mName;
+    bbtkDebugMessage("package",1,"==> Package::Release('"<<
+		     packname<<"')"<<bbtkendl);
+
+    long dyn = pack.lock()->mDynamicLibraryHandler ? 1:0; 
+    long ndesc = pack.lock()->GetDescriptorMap().size();
+    long nrefs = pack.use_count();
+
+    bbtkDebugMessage("package",5," "<<nrefs<<" refs / "
+		     <<ndesc<<" descr / dyn="
+		     <<dyn<<std::endl);
+
+    // A package is "free" from any external reference iff :
+    // i) It is not dynamically loaded and nrefs == ndesc 
+    // (each desc references its package) or
+    // ii) It is dynamically loaded and nrefs == ndesc + 1
+    // (A dynamic library holds a static pointer on the package it contains
+    //  which is allocated when the PACKAGENAMEGetPackage() func is called,
+    //  and descallocated (reset) by PACKAGENAMEDeletePackage())
+    if (nrefs == ndesc + dyn) 
+      {
+	bbtkDebugMessage("package",5,
+			 " -> No more external ref : checking descriptors"
+			 <<bbtkendl);
+	// We must take care that removing refs on descriptors 
+	// can lead to their deletion which can in turn unref 
+	// internal boxes which can release their descriptors hence 
+	// call Package::ReleaseBlackBoxDescriptor 
+	// As a consequence during descriptors release :
+	// 1) The map can change dynamically : we cannot iterate over it 
+	//    as any iterator can become invalid
+	// 2) The package can auto-destruct : we must test its existence 
+	//    after each release
+	// We must also take care of not locking the package pointer 
+	// or any ref count check in Package::ReleaseBlackBoxDescriptor
+	// would be wrong
+
+	// The list of descriptors names at start
+	std::vector<std::string> descnamelist;
+	DescriptorMapType::iterator i;
+	for (i=pack.lock()->mDescriptorMap.begin();
+	     i!= pack.lock()->mDescriptorMap.end();
+	     ++i)
+	  descnamelist.push_back(i->first);
+
+	// Iterator over the initial names
+	std::vector<std::string>::iterator descname;
+	for (descname=descnamelist.begin();
+	     descname!=descnamelist.end();
+	     ++descname)
+	  {
+	    // Is package still alive ?
+	    if (pack.expired()) 
+	      {
+		bbtkDebugMessage("package",1,"--- Package::Release('"<<
+				 packname
+				 <<"') : package expired during release : bailing out"<<bbtkendl);
+		break;
+	      }
+  
+#if defined(MACOSX)
+		  BlackBoxDescriptor::Pointer desc = pack.lock()->mDescriptorMap[*descname];
+		  if ( (dyn==0) || (boost::dynamic_pointer_cast<ComplexBlackBoxDescriptor>(desc)) )
+		  {
+			  PackageReleaseBlackBoxDescriptorInternal(pack,*descname);
+		  } 
+#else
+		  PackageReleaseBlackBoxDescriptorInternal(pack,*descname);
+#endif
+
+	  }
+
+	//
+	UnLoadDynamicLibrary(pack);
+	// Unload orphan dl packages 
+	Package::UnLoadReleasedDynamicallyLoadedPackages();
+
+      }
+    
+#ifdef BBTK_COMPILE_DEBUG_MESSAGES
+
+    bbtkDebugMessage("package",2,"<== Package::Release('"<<
+		     packname<<"')"<<bbtkendl);
+
+    if (!pack.expired())
+      {
+	long dyn = pack.lock()->mDynamicLibraryHandler ? 1:0; 
+	long ndesc = pack.lock()->GetDescriptorMap().size();
+	long nrefs = pack.use_count();
+	
+	bbtkDebugMessage("package",1," ... Package still alive ("
+			 <<nrefs<<" refs / "
+			 <<ndesc<<" descr / dyn="
+			 <<dyn<<")"<<std::endl);
+      }
+    else 
+      {
+	bbtkDebugMessage("package",1," ... Package has been released"
+			 <<std::endl);
+      }
+#endif
+  }
+  //==========================================================================
+
+  //==========================================================================
+  /// "Releases" the package
+  /// Signals the package that it can free the given descriptor
+  /// if they are no more used and free itself if it is no
+  /// more used
+  /// Note : Any non-weak pointer on the package must have been freed
+  void Package::ReleaseBlackBoxDescriptor(Package::WeakPointer pack,
+					  BlackBoxDescriptor::WeakPointer descr)
+  {
+    std::string packname = pack.lock()->mName;
+    std::string dname = descr.lock()->GetTypeName();    
+    bbtkDebugMessage("package",3,"==> Package::ReleaseBlackBoxDescriptor('"<<
+		     packname<<"','"<<dname<<"') : refs="
+		     <<descr.use_count()<<bbtkendl);
+
+    long dyn = pack.lock()->mDynamicLibraryHandler ? 1:0; 
+    long ndesc = pack.lock()->GetDescriptorMap().size();
+    long nrefs = pack.use_count();
+
+    bbtkDebugMessage("package",5," "<<nrefs<<" refs / "
+		     <<ndesc<<" descr / dynamically loaded = "
+		     <<dyn<<std::endl);
+
+    // A package is "free" from any external reference iff :
+    // i) It is not dynamically loaded and nrefs == ndesc 
+    // (each desc references its package) or
+    // ii) It is dynamically loaded and nrefs == ndesc + 1
+    // (A dynamic library holds a static pointer on the package it contains
+    //  which is allocated when the PACKAGENAMEGetPackage() func is called,
+    //  and descallocated (reset) by PACKAGENAMEDeletePackage())
+    if (nrefs == ndesc + dyn) 
+      {
+#if defined(MACOSX)
+		  //
+		  if (dyn==0)
+			  PackageReleaseBlackBoxDescriptorInternal(pack,dname);
+#else
+		  PackageReleaseBlackBoxDescriptorInternal(pack,dname);
+#endif	
+      }
+    
+    // If the package is released and dynamically loaded 
+    // then put it in the static list mReleasedDynamicallyLoadedPackages
+    UnLoadDynamicLibrary(pack,false);
+        
+    bbtkDebugMessage("package",4,"<== Package::ReleaseBlackBoxDescriptor('"<<
+		     packname<<"','"<<dname<<"'): refs="
+		     <<descr.use_count()<<bbtkendl);
     /*
-    AdaptorMapType::const_iterator j;
-    for (j=mAdaptorMap.begin();
-         j!=mAdaptorMap.end();
-       ++j) 
+    if (!pack.expired())
       {
-         delete j->second;
+	long dyn = pack.lock()->mDynamicLibraryHandler ? 1:0; 
+	long ndesc = pack.lock()->GetDescriptorMap().size();
+	long nrefs = pack.use_count();
+	
+	bbtkDebugMessage("package",3," ... Package still alive ("
+			 <<nrefs<<" refs / "
+			 <<ndesc<<" descr / dyn="
+			 <<dyn<<")"<<std::endl);
       }
-    */ 
-    bbtkDebugDecTab("Kernel",7);
+    else 
+      {
+	bbtkDebugMessage("package",3,"   ... Package has been released"
+			 <<std::endl);
+      }  
+    */
+  }
+  //==========================================================================    
+
+  //==========================================================================
+  /// Opens a dynamic library which contains a bbtk package
+  /// Returns the handler 
+  /// Load the package management symbols from the lib
+  /// returns false if a problem occured hence can be used 
+  /// to test that a dyn lib is a valid bbtk package lib
+  /// NB : The BBTK version exported from the library 
+  ///      is tested against the current bbtk version
+  DynamicLibraryHandler Package::OpenDynamicLibrary( const std::string& libname,const std::string& package_name,
+													 DLGetPackageFunction& getpack, DLDeletePackageFunction& delpack)
+  {
+    bbtkDebugMessage("package",3,"==> Package::OpenDynamicLibrary("
+		     <<libname<<")"<<std::endl);
+#if defined(__GNUC__)
+
+    // Open shared lib
+    void *handler;
+    handler = dlopen(libname.c_str(), BBTK_RTLD_TIME | BBTK_RTLD_SCOPE );
+//EED     handler = dlopen(libname.c_str(), RTLD_LAZY | RTLD_LOCAL );
+	  
+    if (!handler)
+      {
+	bbtkMessage("package",0,
+		    "BBTK ..ERROR.. loading could not open shared library [" <<libname<<"] : "
+		    <<dlerror() << std::endl);
+	return 0;
+      }
+
+    bbtkDebugMessage("package",3,"* Shared lib ["<<libname<<"] open"<<std::endl);
+
+    // Loads the Package bbtk version function 
+    std::string getvername(package_name);
+    getvername += BBTK_STRINGIFY_SYMBOL(BBTK_GET_PACKAGE_BBTK_VERSION_FUNCTION_NAME);
+    DLGetPackageBBTKVersionFunction getbbtkversion  = (DLGetPackageBBTKVersionFunction)(dlsym(handler,getvername.c_str()));
+    if (!getbbtkversion)
+      {
+	bbtkDebugMessage("package",3,"***"<<std::endl);
+	bbtkMessage("package",0,
+		    "BBTK ..ERROR.. loading shared library ["<<libname
+		    <<"] is not a valid bbtk package."
+		    <<" Symbol ["<<getvername<<"] :"<<dlerror()<< std::endl);
+ 	dlclose(handler);
+	return 0;
+      }
+
+    bbtkDebugMessage("package",3,"* Symbol ["<<getvername
+		     <<"] found"<<std::endl);
+    // version matches ?
+
+    if (getbbtkversion() != bbtk::GetVersion())
+      {
+	bbtkMessage("package",0,
+		    "BBTK ..ERROR.. loading: "<<package_name
+			<<" - Shared library ["<<libname
+		    <<"] was build with bbtk version "
+		    <<getbbtkversion()
+		    <<" but the current program runs with version "
+		    <<bbtk::GetVersion()<<" : cannot load it. You have to recompile your BBTK-Package."<<std::endl);
+	dlclose(handler);
+	return 0;
+	
+      }
+
+    bbtkDebugMessage("package",3,"* Package bbtk version '"<<getbbtkversion()<<"' matches"<<std::endl);
+	    // Loads the Package get function
+    std::string getpackname(package_name);
+    getpackname += BBTK_STRINGIFY_SYMBOL(BBTK_GET_PACKAGE_FUNCTION_NAME);
+    getpack = (DLGetPackageFunction)(dlsym(handler, getpackname.c_str()));
+    if (!getpack)
+      {
+	bbtkMessage("package",0,
+		    "BBTK ..ERROR.. loading shared library ["<<libname
+		    <<"] is not a valid bbtk package."
+		    <<" Symbol ["<<getpackname<<"] :"<<dlerror()<< std::endl);
+	dlclose(handler);
+	return 0;
+      }
+  
+    bbtkDebugMessage("package",3,"* Symbol ["<<getpackname<<"] found"<<std::endl);
+    // Loads the Package delete function
+					  
+    std::string delpackname(package_name);
+    delpackname += BBTK_STRINGIFY_SYMBOL(BBTK_DEL_PACKAGE_FUNCTION_NAME);
+    delpack = (DLDeletePackageFunction)(dlsym(handler, delpackname.c_str()));
+    if (!delpack)
+      {
+	bbtkMessage("package",0,
+		    "BBTK ..ERROR.. loading shared library ["<<libname
+		    <<"] is not a valid bbtk package."
+		    <<" Symbol ["<<delpackname<<"] :"<<dlerror()<< std::endl);
+	dlclose(handler);
+	return 0;
+      }
+    bbtkDebugMessage("package",3,"* Symbol ["<<delpackname<<"] found"<<std::endl);		  
+#elif defined(_WIN32)
+    
+    HINSTANCE handler;
+    
+    SetErrorMode(0);
+    // Open shared lib
+    handler = LoadLibrary(libname.c_str());
+    if (!handler)
+      {
+	bbtkMessage("package",0,
+		    "BBTK ..ERROR..  could not open shared library [" <<libname<<"]"
+		    << std::endl);
+	DWORD dwErrorCode = 0;
+	dwErrorCode = GetLastError();
+	bbtkMessage("package",2,
+		"Windows Error: [" << dwErrorCode <<"]"
+		<< std::endl);
+	 
+	return 0;
+      }
+    
+    // Loads the Package bbtk version function 
+    std::string getvername(package_name);
+    getvername += BBTK_STRINGIFY_SYMBOL(BBTK_GET_PACKAGE_BBTK_VERSION_FUNCTION_NAME);
+    DLGetPackageBBTKVersionFunction getbbtkversion = (DLGetPackageBBTKVersionFunction)(GetProcAddress(handler, getvername.c_str()));
+	  
+    if (!getbbtkversion)
+      {
+	FreeLibrary(handler);
+	bbtkMessage("package",0,
+		    "BBTK ..ERROR.. loading shared library ["<<libname
+		    <<"] is not a valid bbtk package."
+		    <<" Symbol ["<<getbbtkversion<<"] not found"<< std::endl);
+	return 0;
+      }
+    
+    // version matches ?
+    if (getbbtkversion() != bbtk::GetVersion())
+      {
+		  FreeLibrary(handler);
+		  bbtkMessage("package",0,
+				"BBTK ..ERROR.. loading: "<<package_name
+				<<" - Shared library ["<<libname
+				<<"] was build with bbtk version "
+				<<getbbtkversion()
+				<<" but the current program runs with version "
+				<<bbtk::GetVersion()<<" : cannot load it. You have to recompile your BBTK-Package."<<std::endl);
+		  return 0;
+      }
+
+     // Loads the Package get function
+    std::string getpackname(package_name);
+    getpackname += BBTK_STRINGIFY_SYMBOL(BBTK_GET_PACKAGE_FUNCTION_NAME);
+    getpack = (DLGetPackageFunction)(GetProcAddress(handler, getpackname.c_str()));
+    if (!getpack)
+      {
+	FreeLibrary(handler);
+	bbtkMessage("package",0,
+		    "BBTK ..ERROR.. loading shared library ["<<libname
+		    <<"] is not a valid bbtk package."
+		    <<" Symbol ["<<getpackname<<"] not found"<< std::endl);
+	return 0;
+      }
+    
+    // Loads the Package delete function
+    std::string delpackname(package_name);
+    delpackname += BBTK_STRINGIFY_SYMBOL(BBTK_DEL_PACKAGE_FUNCTION_NAME);
+    delpack = (DLDeletePackageFunction)(GetProcAddress(handler, delpackname.c_str()));
+    if (!delpack)
+      {
+	FreeLibrary(handler);
+	bbtkMessage("package",0,
+		    "BBTK ..ERROR.. loading shared library ["<<libname
+		    <<"] is not a valid bbtk package."
+		    <<" Symbol ["<<delpackname<<"] not found"<< std::endl);
+	return 0;
+      }
+					 
+#else
+    bbtkError("neither __GNUC__ nor _WIN32 ?!? How did you compile ?");
+#endif
+    
+    return handler;
+  }
+  //==========================================================================
+  
+  //==========================================================================
+  /// Loads a package from a dynamic library
+  Package::Pointer Package::CreateFromDynamicLibrary(const std::string& libname,
+						     const std::string& pkgname,
+						     const std::string& path)
+  {
+    bbtkDebugMessage("package",1,"==> Package::CreateFromDynamicLibrary("
+		     <<libname<<")"<<std::endl);
+
+    DLGetPackageFunction gf;
+    DLDeletePackageFunction df;
+    DynamicLibraryHandler h = Package::OpenDynamicLibrary(libname,
+							  pkgname,
+							  gf,df);
+    if (h==0) return Package::Pointer(); 
+    Package::Pointer p = gf();
+    p->mDynamicLibraryHandler = h;
+    p->mDLDeletePackageFunction = df;
+    
+    std::string separator =
+      ConfigurationFile::GetInstance().Get_file_separator ();
+    //BBTK_STRINGIFY_SYMBOL(BBTK_DOC_REL_PATH)
+    std::string docreldoc = 
+      separator + "bbdoc" + separator + pkgname + separator + "index.html";
+    std::string reldoc = 
+      ".." + separator + ".." + docreldoc;
+    std::string doc = path + separator + ".." + separator
+      + BBTK_STRINGIFY_SYMBOL(BBTK_DOC_REL_PATH)
+      + docreldoc;
+    
+    p->SetDocURL(doc);
+    p->SetDocRelativeURL(reldoc);
+    
+    bbtkDebugMessage("package",2,"<== Package::CreateFromDynamicLibrary("
+		     <<libname<<") .. OK"<<std::endl);
+    return p;
+  }
+  //==========================================================================
+
+
+
+
+  //==========================================================================
+  /// UnLoads the package dynamic library (if any)
+  void Package::UnLoadDynamicLibrary(Package::WeakPointer pack, bool doit)
+  {
+    if (pack.expired() || (!pack.lock()->mDynamicLibraryHandler))
+      return;
+
+    std::string packname = pack.lock()->GetName();
+    bbtkDebugMessage("package",5,"==> Package::UnLoadDynamicLibrary('"
+		     <<packname<<"')"
+		     <<std::endl);
+
+    if (!pack.lock()->GetDescriptorMap().empty())
+      {
+
+	bbtkDebugMessage("package",5,"   Package not empty ... abort"
+			 <<std::endl);
+	return;
+	/*
+	bbtkGlobalError("Package::UnLoadDynamicLibrary('"<<packname<<") : "
+			<<"DescriptorMap not empty "
+			<<BBTK_INTERNAL_ERROR_MESSAGE);
+	*/
+      }
+
+    if (pack.use_count()!=1)
+      {
+	bbtkGlobalError("Package::UnLoadDynamicLibrary('"<<packname<<") : "
+			<<"empty dl package with external refs"
+			<<BBTK_INTERNAL_ERROR_MESSAGE);
+      } 
+
+    if (doit) 
+      {
+	UnLoad(pack);
+	bbtkDebugMessage("package",5,"==> dynamic library for package '"
+			 <<packname<<"' closed"
+			 <<std::endl);    
+      }
+    else 
+      {
+	mReleasedDynamicallyLoadedPackages.insert(pack);
+	bbtkDebugMessage("package",1,"==> package '"<<packname
+			 <<"' put in the 'to unload' list"
+			 <<std::endl);
+      }
+
+    bbtkDebugMessage("package",5,"<== Package::UnLoadDynamicLibrary('"
+		     <<packname<<"')"
+		     <<std::endl); 
+  }
+  //==========================================================================
+
+  //==========================================================================
+  /// UnLoads released packages that were loaded dynamically
+  /// see UnLoadDynamicLibrary and ReleaseBlackBoxDescriptor
+  void Package::UnLoadReleasedDynamicallyLoadedPackages()
+  {
+    bbtkDebugMessage("package",5,"==> Package::UnLoadReleasedDynamicallyLoadedPackages()"<<std::endl);
+
+    std::set<Package::WeakPointer>::iterator i;
+
+//JCP- 21-04-09
+	if(mReleasedDynamicallyLoadedPackages.size()>0){
+		for (i=mReleasedDynamicallyLoadedPackages.begin();
+		i!=mReleasedDynamicallyLoadedPackages.end();
+		++i)
+		{
+		if (!i->expired()) UnLoad(*i);
+		}
+	}
+//JCP- 21-04-09
+    bbtkDebugMessage("package",5,"<== Package::UnLoadReleasedDynamicallyLoadedPackages()"<<std::endl);
   }
   //==========================================================================
 
+  //==========================================================================
+  void Package::UnLoad(Package::WeakPointer pack)
+  {
+    std::string packname = pack.lock()->GetName();
+    bbtkDebugMessage("package",6,"==> Package::UnLoad("<<packname<<")"<<std::endl);
 
+    Package* p = pack.lock().get();
+    
+    DynamicLibraryHandler h = p->mDynamicLibraryHandler;
+    
+    // deletes the package
+    p->mDLDeletePackageFunction();
+    
+    // closes the dl handler
+#if defined(__GNUC__)  
+	  if (dlclose(h)!=0)
+	  {
+		  printf("EED Package::UnLoad ERROR %s\n", packname.c_str() );
+		  bbtkWarning("Failed to close dynamic library for package '"<<packname
+					  <<"'"<<std::endl);
+	  }  
+	  
+#elif defined(_WIN32)
+    FreeLibrary(h);
+#endif
+
+    bbtkDebugMessage("package",1,"==> dynamic library for package '"
+		     <<packname<<"' closed"
+		     <<std::endl);    
+    bbtkDebugMessage("package",6,"   ... dynamic library unloaded"<<std::endl);
+  }
+  //==========================================================================
 
+	bool Package::ifBoxExist( std::string type)	
+    {
+		bool ok=false;
+		DescriptorMapType::const_iterator i = mDescriptorMap.find(type);
+		if (i != mDescriptorMap.end())  
+		{
+			ok=true;
+		}
+		return ok;
+    }
+	
   //==========================================================================
   /// Creates an instance of a black box of type <type> with name <name>
-  BlackBox* Package::NewBlackBox(const std::string& type, 
-				    const std::string& name) const
+  BlackBox::Pointer Package::NewBlackBox(const std::string& type, 
+					 const std::string& name) const
   {
-    bbtkDebugMessageInc("Kernel",8,"Package<"<<GetName()<<">::NewBlackBox(\""<<type<<"\",\""<<name<<"\")"<<bbtkendl);
+    bbtkDebugMessageInc("kernel",8,"Package<"<<GetName()<<">::NewBlackBox(\""<<type<<"\",\""<<name<<"\")"<<bbtkendl);
     
-    BlackBoxMapType::const_iterator i = mBlackBoxMap.find(type);
-    if (i == mBlackBoxMap.end())  
+    DescriptorMapType::const_iterator i = mDescriptorMap.find(type);
+    if (i == mDescriptorMap.end())  
     {
-	   bbtkDebugDecTab("Kernel",8);
-	   return 0;
+	   bbtkDebugDecTab("kernel",8);
+	   return BlackBox::Pointer();
     }
-    BlackBox* bb =i->second->CreateInstance(name);
-    bbtkDebugDecTab("Kernel",8);
+    BlackBox::Pointer bb =i->second->NewBlackBox(name);
+    bbtkDebugDecTab("kernel",8);
     return bb;   
 
   }
@@ -121,11 +717,11 @@ namespace bbtk
   //==========================================================================
   /// Creates an instance of an adaptor of input type <typein> and 
   /// output type <typeout>  with name <name>
-  BlackBox* Package::NewAdaptor(const DataInfo& typein,
+  BlackBox::Pointer Package::NewAdaptor(const DataInfo& typein,
 				const DataInfo& typeout,
 				const std::string& name) const
   {
-    bbtkDebugMessageInc("Kernel",8,"Package<"<<GetName()<<
+    bbtkDebugMessageInc("kernel",8,"Package<"<<GetName()<<
 			">::NewAdaptor("
 			<<typein<<","
 			<<typeout<<",\""
@@ -136,11 +732,11 @@ namespace bbtk
     AdaptorMapType::const_iterator i = mAdaptorMap.find(key);
     if (i == mAdaptorMap.end())  
       {
-	bbtkDebugDecTab("Kernel",8);
-	return 0;
+	bbtkDebugDecTab("kernel",8);
+	return BlackBox::Pointer();
       }
-    BlackBox* bb =i->second->CreateInstance(name);
-    bbtkDebugDecTab("Kernel",8);
+    BlackBox::Pointer bb =i->second.lock()->NewBlackBox(name);
+    bbtkDebugDecTab("kernel",8);
     return bb;   
 
   }
@@ -149,26 +745,26 @@ namespace bbtk
   //==========================================================================
   /// Creates an instance of an adaptor of input type <typein> and 
   /// output type <typeout>  with name <name>
-  BlackBox* Package::NewWidgetAdaptor(const DataInfo& typein,
+  BlackBox::Pointer Package::NewWidgetAdaptor(const DataInfo& typein,
 				      const DataInfo& typeout,
 				      const std::string& name) const
   {
-    bbtkDebugMessageInc("Kernel",8,"Package<"<<GetName()<<
+    bbtkDebugMessageInc("kernel",8,"Package<"<<GetName()<<
 			">::NewWidgetAdaptor("
 			<<typein<<","
 			<<typeout<<",\""
 			<<name<<"\")"<<bbtkendl);
 
     AdaptorKey key(typein,typeout,
-		   BlackBoxDescriptor::DEFAULT_WIDGET_ADAPTOR);
+		   BlackBoxDescriptor::DEFAULT_GUI);
     AdaptorMapType::const_iterator i = mAdaptorMap.find(key);
     if (i == mAdaptorMap.end())  
       {
-	bbtkDebugDecTab("Kernel",8);
-	return 0;
+	bbtkDebugDecTab("kernel",8);
+	return BlackBox::Pointer();
       }
-    BlackBox* bb =i->second->CreateInstance(name);
-    bbtkDebugDecTab("Kernel",8);
+    BlackBox::Pointer bb =i->second.lock()->NewBlackBox(name);
+    bbtkDebugDecTab("kernel",8);
     return bb;   
 
   }
@@ -185,22 +781,24 @@ namespace bbtk
 				  const DataInfo& typeout,
 				  std::string& adaptor) const
   {
-    bbtkDebugMessageInc("Kernel",8,"Package<"<<GetName()<<
+    bbtkDebugMessageInc("kernel",8,"Package<"<<GetName()<<
 			">::FindWidgetAdaptor("
 			<<typein<<","
 			<<typeout<<")"<<bbtkendl);
    
-    AdaptorKey key(typein,typeout,
-		   BlackBoxDescriptor::DEFAULT_WIDGET_ADAPTOR);
+    AdaptorKey key(/*typein*/
+		   DataInfo(typeid(void),""),
+		   typeout,
+		   BlackBoxDescriptor::DEFAULT_GUI);
     // First try to find a single widget adaptor
     AdaptorMapType::const_iterator i = mAdaptorMap.find(key);
     if (i == mAdaptorMap.end())  
       {
-	bbtkDebugDecTab("Kernel",8);
+	bbtkDebugDecTab("kernel",8);
 	return false;
       }
-    adaptor = i->second->GetTypeName();
-    bbtkDebugDecTab("Kernel",8);
+    adaptor = i->second.lock()->GetTypeName();
+    bbtkDebugDecTab("kernel",8);
     return true;   
 
   }
@@ -217,7 +815,7 @@ namespace bbtk
 			    const DataInfo& typeout,
 			    std::string& adaptor) const
   {
-    bbtkDebugMessageInc("Kernel",8,"Package<"<<GetName()<<
+    bbtkDebugMessageInc("kernel",8,"Package<"<<GetName()<<
 			">::FindAdaptor("
 			<<typein<<","
 			<<typeout<<")"<<bbtkendl);
@@ -227,11 +825,11 @@ namespace bbtk
     AdaptorMapType::const_iterator i = mAdaptorMap.find(key);
     if (i == mAdaptorMap.end())  
       {
-	bbtkDebugDecTab("Kernel",8);
+	bbtkDebugDecTab("kernel",8);
 	return false;
       }
-    adaptor = i->second->GetTypeName();
-    bbtkDebugDecTab("Kernel",8);
+    adaptor = i->second.lock()->GetTypeName();
+    bbtkDebugDecTab("kernel",8);
     return true;   
 
   }
@@ -240,37 +838,35 @@ namespace bbtk
 
   //==========================================================================
   /// Registers a black box descriptor in the package
-  bool Package::RegisterBlackBox(BlackBoxDescriptor* d) 
+  bool Package::Register(BlackBoxDescriptor::Pointer d) 
   {
-    bbtkDebugMessageInc("Kernel",8,"Package<"<<GetName()<<">::RegisterBlackBox(\""<<d->GetTypeName()<<"\")"<<std::endl);
+    bbtkDebugMessageInc("kernel",8,"Package<"<<GetName()<<">::Register(\""<<d->GetTypeName()<<"\")"<<std::endl);
     
-    BlackBoxMapType::iterator i = mBlackBoxMap.find(d->GetTypeName());
-    if (i!=mBlackBoxMap.end())
+    DescriptorMapType::iterator i = mDescriptorMap.find(d->GetTypeName());
+    if (i!=mDescriptorMap.end())
       {
 	bbtkWarning("Package<"<<GetName()<<"> : Trying to register box type <"
 		    <<d->GetTypeName()<<"> which is already in the package");
 	return false;
       }
 
-    mBlackBoxMap[d->GetTypeName()] = d;
-    d->Reference();
-    d->SetPackage(this);
+    mDescriptorMap[d->GetTypeName()] = d;
+    //    d->Reference();
+    d->SetPackage(GetThisPointer<Package>());
     
     // If it is a default adaptor, also register it in the adaptors map
-    if ( (d->GetKind() == BlackBoxDescriptor::DEFAULT_ADAPTOR) ||
-	 (d->GetKind() == BlackBoxDescriptor::DEFAULT_WIDGET_ADAPTOR) )
+    if ( d->GetKind() == BlackBoxDescriptor::DEFAULT_ADAPTOR )
       {
-	bbtkDebugMessage("Kernel",8,"Package<"<<GetName()<<">::RegisterBlackBox(\""<<d->GetTypeName()<<"\") : The box is an adaptor, inserting it in adaptors map ..."<<std::endl);   
+	bbtkDebugMessage("kernel",8,"Package<"<<GetName()<<">::Register(\""<<d->GetTypeName()<<"\") : The box is an adaptor, inserting it in adaptors map ..."<<std::endl);   
+	
 	TypeInfo typein = d->GetInputDescriptor("In")->GetTypeInfo();
 	TypeInfo typeout = d->GetOutputDescriptor("Out")->GetTypeInfo();
 	DataInfo infoin(typein,d->GetInputDescriptor("In")->GetNature());
 	DataInfo infoout(typeout,d->GetOutputDescriptor("Out")->GetNature());
-	bbtkDebugMessage("Kernel",9,"Adaptor "<<infoin<<" to "<<infoout 
-			 <<" - kind="<<d->GetKind()<<std::endl);  
-
 	AdaptorKey key(infoin,infoout,d->GetKind());
-
-	AdaptorMapType::const_iterator i = mAdaptorMap.find(key);
+	
+	AdaptorMapType::const_iterator i;
+	i = mAdaptorMap.find(key);	  
 	if (i == mAdaptorMap.end())  
 	  {
 	    mAdaptorMap[key] = d;
@@ -278,121 +874,107 @@ namespace bbtk
 	// If already an adaptor registered : error
 	else 
 	  {
-	    if (i->second->GetTypeName() != d->GetTypeName()) 
+	    if (i->second.lock()->GetTypeName() != d->GetTypeName()) 
 	      {
 		bbtkError("Package <"<<GetName()<<
 			  "> : trying to register black box <"
 			  <<d->GetTypeName()
 			  <<"> as default adaptor but there is already a default adaptor registered (<"
-			  <<i->second->GetTypeName()<<">)");
+			  <<i->second.lock()->GetTypeName()<<">)");
+	      }
+	  }
+      }
+    // If it is a default adaptor, also register it in the adaptors map
+    else if ( d->GetKind() == BlackBoxDescriptor::DEFAULT_GUI)
+      {
+	bbtkDebugMessage("kernel",8,"Package<"<<GetName()<<">::Register(\""<<d->GetTypeName()<<"\") : The box is a widget adaptor, inserting it in adaptors map ..."<<std::endl);   
+	
+	TypeInfo typeout = d->GetOutputDescriptor("Out")->GetTypeInfo();
+	DataInfo infoin(typeid(void),"");
+	DataInfo infoout(typeout,d->GetOutputDescriptor("Out")->GetNature());
+	AdaptorKey key(infoin,infoout,d->GetKind());
+
+	AdaptorMapType::const_iterator i;
+	i = mAdaptorMap.find(key);	  
+	if (i == mAdaptorMap.end())  
+	  {
+	    mAdaptorMap[key] = d;
+	  }
+	// If already an adaptor registered : error
+	else 
+	  {
+	    if (i->second.lock()->GetTypeName() != d->GetTypeName()) 
+	      {
+		bbtkError("Package <"<<GetName()<<
+			  "> : trying to register black box <"
+			  <<d->GetTypeName()
+			  <<"> as default widget adaptor but there is already a default adaptor registered (<"
+			  <<i->second.lock()->GetTypeName()<<">)");
 	      }
 	  }
       }
     
-    bbtkDebugDecTab("Kernel",8);
+
+    bbtkDebugDecTab("kernel",8);
    
     return true;
   }
   //==========================================================================
   
   //===================================================================
-  void Package::CheckBoxes() const
+  void Package::Check() const
   {
-    bbtkMessage("Debug",1,"****** Checking Package "<<(void*)this
+    bbtkMessage("debug",1,"****** Checking Package "<<(void*)this
 		<<" ["<<GetName()<<"]"<<std::endl);
-    BlackBoxMapType::const_iterator i;
-    for (i=mBlackBoxMap.begin();
-	 i!=mBlackBoxMap.end();
+    DescriptorMapType::const_iterator i;
+    for (i=mDescriptorMap.begin();
+	 i!=mDescriptorMap.end();
 	 ++i) 
       {
 	i->second->Check(true);
       }
-    bbtkMessage("Debug",1,"****** Checking Package "<<(void*)this
+    bbtkMessage("debug",1,"****** Checking Package "<<(void*)this
 		<<" ["<<GetName()<<"] ... OK"<<std::endl);
   }
   //===================================================================
 
-  //==========================================================================
-  /// UnRegisters a black box descriptor from the package
-  void Package::UnRegisterBlackBox(const std::string& name) 
-  {
-    bbtkDebugMessageInc("Kernel",8,"Package<"<<GetName()<<">::UnRegisterBlackBox(\""<<name<<"\")"<<std::endl);
-    // Looking into the bb map
-    BlackBoxMapType::iterator i = mBlackBoxMap.find(name);
-    if (i == mBlackBoxMap.end())  
-    {
-       bbtkDebugDecTab("Kernel",8);
-       bbtkError("UnRegister : The package <"<<GetName()<<"> does not contains the black box <"<<name<<">");
-     }
-    mBlackBoxMap.erase(i);
-
-    // Is it also in the adaptors map ?
-    /*
-    AdaptorMapType::iterator j = mAdaptorMap.find(name);
-    if (j != mAdaptorMap.end())  
-      {
-         mAdaptorMap.erase(j);
-      }
-    */    
-
-    i->second->UnReference();
-
-    bbtkDebugDecTab("Kernel",8);    
-  }
-  //==========================================================================
 
   //==========================================================================
   /// Changes the name of a black box type
-  void Package::ChangeBlackBoxName( const std::string& oldname, const std::string& newname )
+  void Package::ChangeDescriptorName( const std::string& oldname, const std::string& newname )
   { 
-    bbtkDebugMessageInc("Kernel",8,"Package<"<<GetName()<<">::ChangeBlackBoxName(\""<<oldname<<"\",\""<<newname<<"\")"<<std::endl);
+    bbtkDebugMessageInc("kernel",8,"Package<"<<GetName()
+			<<">::ChangeDescriptorName(\""<<oldname
+			<<"\",\""<<newname<<"\")"<<std::endl);
     // Looking into the bb map
-    BlackBoxMapType::iterator i = mBlackBoxMap.find(oldname);
-    if (i == mBlackBoxMap.end())  
+    DescriptorMapType::iterator i = mDescriptorMap.find(oldname);
+    if (i == mDescriptorMap.end())  
       {
-         bbtkDebugDecTab("Kernel",8);
-         bbtkError("ChangeBlackBoxName : The package <"<<GetName()<<"> does not contains the black box <"<<oldname<<">");
+         bbtkDebugDecTab("kernel",8);
+         bbtkError("ChangeDescriptorName : The package <"<<GetName()<<"> does not contains the black box <"<<oldname<<">");
       }
 
     i->second->SetTypeName(newname);
-    mBlackBoxMap[newname] = i->second;
-    mBlackBoxMap.erase(i);
+    mDescriptorMap[newname] = i->second;
+    mDescriptorMap.erase(i);
 
-    bbtkDebugDecTab("Kernel",8);    
+    bbtkDebugDecTab("kernel",8);    
   }
   //==========================================================================
 
-  /*
-
-  //==========================================================================
-  /// Registers an adaptor descriptor in the package
-  bool Package::RegisterAdaptor(BlackBoxDescriptor* d) 
-  {
-    bbtkDebugMessage("Kernel",8,"Package<"<<GetName()<<">::RegisterAdaptor(\""<<d->GetTypeName()<<"\")"<<std::endl);
-    
-    TypeInfo typein = d->GetInputDescriptor("In")->GetTypeInfo();
-    TypeInfo typeout = d->GetOutputDescriptor("Out")->GetTypeInfo();
-    AdaptorKey key(typein,typeout);
-    
-    mAdaptorMap[key] = d;
-    return true;
-  }
-  //==========================================================================
-  */
 
 
   //==========================================================================
-  /// Displays the list of black boxes of the package
-  void Package::PrintBlackBoxes(bool description, bool adaptors) const
+  void Package::PrintHelpListDescriptors(bool description, bool adaptors) const
   {
     unsigned int lmax = 0;
     std::vector<std::string> names;
     std::vector<std::string> kinds;
     std::vector<std::string> descrs;
 
-    BlackBoxMapType::const_iterator i;
-    for (i=mBlackBoxMap.begin();
-	 i!=mBlackBoxMap.end();
+    DescriptorMapType::const_iterator i;
+    for (i=mDescriptorMap.begin();
+	 i!=mDescriptorMap.end();
 	 ++i) 
       {
 	if ( adaptors || 
@@ -436,15 +1018,15 @@ namespace bbtk
       {
 	std::string space;
 	space.append(lmax - ni->size() - ci->size(),' ');
-	bbtkMessage("Help",1,*ni << space << *ci );
+	bbtkMessage("help",1,*ni << space << *ci );
 	std::string d(*di);
 	unsigned int dmax = 75 - lmax;
 	//	while (d.size() > dmax ) 
 	//  {
 	if (d.size()>dmax) 
-	  bbtkMessage("Help",1,d.substr(0,dmax) << "..." << std::endl);
+	  bbtkMessage("help",1,d.substr(0,dmax) << "..." << std::endl);
 	else 
-	  bbtkMessage("Help",1,d << std::endl);
+	  bbtkMessage("help",1,d << std::endl);
 	//    d = d.substr(dmax,d.size());
 	//  }
       }
@@ -454,30 +1036,30 @@ namespace bbtk
 
   //==========================================================================
   /// Displays the list of adaptors of the package
-  void Package::PrintAdaptors(bool description) const
+  void Package::PrintHelpListAdaptors(bool description) const
   {
-    BlackBoxMapType::const_iterator i;
-    for (i=mBlackBoxMap.begin();
-	 i!=mBlackBoxMap.end();
+    DescriptorMapType::const_iterator i;
+    for (i=mDescriptorMap.begin();
+	 i!=mDescriptorMap.end();
 	 ++i) 
       {
 	if ( i->second->GetKind() != BlackBoxDescriptor::STANDARD ) 
 	  {
-	    bbtkMessage("Help",1,
+	    bbtkMessage("help",1,
 			"  "<<i->second->GetTypeName());
 	    if ( i->second->GetKind() == 
 		 BlackBoxDescriptor::DEFAULT_ADAPTOR )
 	      {
-		bbtkMessage("Help",1,
+		bbtkMessage("help",1,
 			    " [default]");
 	      }  
 	    if (description) 
 	      {
-		bbtkMessage("Help",1,
+		bbtkMessage("help",1,
 			    " : "<<i->second->GetDescription());
 
 	      } 
-	    bbtkMessage("Help",1,std::endl);
+	    bbtkMessage("help",1,std::endl);
 	  }
       } 
     /*
@@ -486,36 +1068,37 @@ namespace bbtk
 	 i!=mAdaptorMap.end();
 	 ++i) 
       {
-	bbtkMessage("Help",1,
+	bbtkMessage("help",1,
 		    "  "<<i->second->GetTypeName());
 	if (detail_level>0) 
 	  {
-	    bbtkMessage("Help",1,
+	    bbtkMessage("help",1,
 			" : "<<i->second->GetDescription());
   
 	  } 
-	bbtkMessage("Help",1,std::endl);
+	bbtkMessage("help",1,std::endl);
       }
     */ 
   }
   //==========================================================================
 
   //==========================================================================
-  /// Prints help on a black box
-  void Package::HelpBlackBox(const std::string& name, bool full) const
+  /// Prints help on a black box descriptor
+  void Package::PrintHelpDescriptor(const std::string& name, bool full) const
   {
-    bbtkDebugMessageInc("Kernel",8,"Package<"<<GetName()<<">::HelpBlackBox(\""
+    bbtkDebugMessageInc("kernel",8,"Package<"<<GetName()
+			<<">::PrintHelpDescriptor(\""
 			<<name<<"\")"<<bbtkendl);
 
-    BlackBoxMapType::const_iterator i = mBlackBoxMap.find(name);
-    if (i == mBlackBoxMap.end())  
+    DescriptorMapType::const_iterator i = mDescriptorMap.find(name);
+    if (i == mDescriptorMap.end())  
       {
-	bbtkDebugDecTab("Kernel",8);
+	bbtkDebugDecTab("kernel",8);
 	bbtkError("The package <"<<GetName()<<"> does not contains the black box <"<<name<<">");
       }
-    //    bbtkMessage("Help",1,"["<<GetName()<<"] ");
+    //    bbtkMessage("help",1,"["<<GetName()<<"] ");
     i->second->GetHelp(full);
-    bbtkDebugDecTab("Kernel",8);
+    bbtkDebugDecTab("kernel",8);
 
   }
   //==========================================================================
@@ -523,18 +1106,19 @@ namespace bbtk
 
   //==========================================================================
   /// Returns true iff the package contains the box of name boxname
-  bool Package::ContainsBlackBox(const std::string& name) const 
+  bool Package::ContainsDescriptor(const std::string& name) const 
   {
-    bbtkDebugMessageInc("Kernel",8,"Package<"<<GetName()<<">::HelpBlackBox(\""
+    bbtkDebugMessageInc("kernel",8,"Package<"<<GetName()
+			<<">::ContainsDescriptor(\""
 			<<name<<"\")"<<bbtkendl);
     
-    BlackBoxMapType::const_iterator i = mBlackBoxMap.find(name);
-    if (i == mBlackBoxMap.end())  
+    DescriptorMapType::const_iterator i = mDescriptorMap.find(name);
+    if (i == mDescriptorMap.end())  
     {
-      bbtkDebugDecTab("Kernel",8);
+      bbtkDebugDecTab("kernel",8);
       return false;
     }
-    bbtkDebugDecTab("Kernel",8);
+    bbtkDebugDecTab("kernel",8);
     return true;
   }
   //==========================================================================
@@ -551,9 +1135,11 @@ namespace bbtk
 			       int level,
 			       bool relative_link ) const
   {
-    bbtkDebugMessageInc("Kernel",9,"Package<"<<GetName()<<">::CreateHtmlPage(\""
+    bbtkDebugMessageInc("kernel",9,"Package<"<<GetName()<<">::CreateHtmlPage(\""
 			<<filename<<"\")"<<bbtkendl);
 
+//std::cout<<"JCP bbtkPackage.cxx void Package::CreateHtmlPage() ln 1133"<<std::endl;
+
     //---------------------
     // Open output file
     std::ofstream s;
@@ -641,10 +1227,10 @@ namespace bbtk
   	s << "<TR><TD style='vertical-align: top;'><b> Version </b></TD><TD style='vertical-align: top;'> : </TD><TD style='vertical-align: top;'> " 
 	  << GetVersion() << "</TD></TR>\n";
 	s << "<TR><TD style='vertical-align: top;'><b> bbtk Version </b></TD><TD style='vertical-align: top;'> : </TD><TD style='vertical-align: top;'> " 
-	  << GetBBTKVersion() << "</TD></TR>\n";
+	  << bbtk::GetVersion() << "</TD></TR>\n";
 	s << "</TABLE>\n";
       }
-
+//std::cout<<"JCP bbtkPackage.cxx void Package::CreateHtmlPage() ln 1225"<<std::endl;
     //-------------------
     // Table of contents
     // Black boxes list
@@ -654,65 +1240,65 @@ namespace bbtk
 
     s << "<p><TABLE cellspacing=0  cellpadding=3>\n";
 
-    BlackBoxMapType::const_iterator i;
-    for (i=mBlackBoxMap.begin(); i!=mBlackBoxMap.end(); ++i) 
-      {
-	if ( i->second->GetKind() != BlackBoxDescriptor::STANDARD) 
-	  continue;
+    DescriptorMapType::const_iterator i;
+//std::cout<<"JCP bbtkPackage.cxx void Package::CreateHtmlPage() ln 1236"<<std::endl;
+    for (i=mDescriptorMap.begin(); i!=mDescriptorMap.end(); ++i) {
+		if ( i->second->GetKind() != BlackBoxDescriptor::STANDARD) 
+			continue;
 	
-	std::string name = i->second->GetTypeName();
-	Utilities::html_format(name);
-	std::string descr = i->second->GetDescription();
-	Utilities::html_format(descr);
-
-        s << "<TR>";
-	s << "<TD style='vertical-align: top;'>";
-	s << "&nbsp;&nbsp;&nbsp;<a name=\"toc_"<<name
-	  <<"\" href=\"#"<<name<<"\">"
-	  <<name<<"</a>";
-	s << "</TD> ";
-	s << " <TD style='vertical-align: top;'>" << descr << " </TD>";
-        s << "</TR>\n";
-      }    
-    s << "</TABLE>\n";
-    
-    
-    s << "</ul>\n";
-    s << "</div>\n";
+		std::string name = i->second->GetTypeName();
+		Utilities::html_format(name);
+		std::string descr = i->second->GetDescription();
+		//Utilities::html_format(descr);
+//std::cout<<"JCP bbtkPackage.cxx void Package::CreateHtmlPage() ln 1246"<<std::endl;
+		s << "<TR>";
+		s << "<TD style='vertical-align: top;'>";
+		s << "&nbsp;&nbsp;&nbsp;<a name=\"toc_"<<name
+		<<"\" href=\"#"<<name<<"\">"
+		<<name<<"</a>";
+		s << "</TD> ";
+		s << " <TD style='vertical-align: top;'>" << descr << " </TD>";
+		s << "</TR>\n";
+		}    
+		s << "</TABLE>\n";
+
+
+		s << "</ul>\n";
+		s << "</div>\n";
     
-    //-------------------
-    // Adaptors list
-    if (mAdaptorMap.size()>0) 
-      {
-	//  s << "<div class=\"contents\">\n";
-	s << "<p><b> Adaptors : </b>\n";
-	s << "<ul>\n";
-
-	//    BlackBoxMapType::const_iterator i;
-	s << "<p><TABLE cellspacing=0  cellpadding=3>\n";
-	for (i=mBlackBoxMap.begin(); i!=mBlackBoxMap.end();++i) 
-	  {
-	    if ( i->second->GetKind() == BlackBoxDescriptor::STANDARD) 
-	      continue;
-    
-	    std::string name = i->second->GetTypeName();
-	    Utilities::html_format(name);
-	    std::string descr = i->second->GetDescription();
-    
-	    s << "<TR>";
-	    s << "<TD style='vertical-align: top;'>";
-	    s << "&nbsp;&nbsp;&nbsp;<a name=\"toc_"<<name
-	      <<"\" href=\"#"<<name<<"\">"
-	      <<name<<"</a>";
-	    s << "</TD> ";
-	    s << " <TD style='vertical-align: top;'>" << descr << " </TD>";
-	    s << "</TR>\n";
-	  }    
-	s << "</TABLE>\n";
-
-	s << "</ul>\n";
-	s << "</div>\n";
-      }
+		//-------------------
+		// Adaptors list
+		if (mAdaptorMap.size()>0) 
+		{
+			//  s << "<div class=\"contents\">\n";
+			s << "<p><b> Adaptors : </b>\n";
+			s << "<ul>\n";
+//std::cout<<"JCP bbtkPackage.cxx void Package::CreateHtmlPage() ln 1268"<<std::endl;
+			//    DescriptorMapType::const_iterator i;
+			s << "<p><TABLE cellspacing=0  cellpadding=3>\n";
+			for (i=mDescriptorMap.begin(); i!=mDescriptorMap.end();++i) 
+			{
+				if ( i->second->GetKind() == BlackBoxDescriptor::STANDARD) 
+					continue;
+    
+				std::string name = i->second->GetTypeName();
+				Utilities::html_format(name);
+				std::string descr = i->second->GetDescription();
+		    
+				s << "<TR>";
+				s << "<TD style='vertical-align: top;'>";
+				s << "&nbsp;&nbsp;&nbsp;<a name=\"toc_"<<name
+				  <<"\" href=\"#"<<name<<"\">"
+				  <<name<<"</a>";
+				s << "</TD> ";
+				s << " <TD style='vertical-align: top;'>" << descr << " </TD>";
+				s << "</TR>\n";
+			}    
+			s << "</TABLE>\n";
+
+			s << "</ul>\n";
+			s << "</div>\n";
+		}
     
     
     //  s << "<div class=\"node\">\n";
@@ -731,23 +1317,23 @@ namespace bbtk
     //-------------------
     // Computes output directory from filename to pass it to 
     // BlackBoxDescriptor::InsertHtmlHelp
-    std::string dir;
+		std::string dir;
 
-    std::string::size_type slash_position = filename.find_last_of("/\\");
+		std::string::size_type slash_position = filename.find_last_of("/\\");
 
 
-	if (slash_position != std::string::npos) {
-      if (slash_position == 0)
-         slash_position = 1;  
-      dir = filename.substr(0,slash_position);
-    }
+		if (slash_position != std::string::npos) {
+			if (slash_position == 0)
+			 slash_position = 1;  
+			dir = filename.substr(0,slash_position);
+		}
 
-    for (i=mBlackBoxMap.begin();
-	 i!=mBlackBoxMap.end();
-	 ++i) 
-      {
-	i->second->InsertHtmlHelp(s,detail,level,dir,relative_link);
-      }    
+		for (i=mDescriptorMap.begin();
+		 i!=mDescriptorMap.end();
+		 ++i) 
+		{
+			i->second->InsertHtmlHelp(s,detail,level,dir,relative_link);
+		}    
 
     //----------------------
     // Footer 
@@ -767,8 +1353,75 @@ namespace bbtk
     //----------------------
 
     // End
-    bbtkDebugDecTab("Kernel",9);
+    bbtkDebugDecTab("kernel",9);
+  }
+  //==========================================================================
+  
+  //==========================================================================
+  std::string  Package::GetObjectName() const 
+  { 
+    return std::string("Package '")+mName+std::string("'"); 
+  }
+  //==========================================================================
+
+  //==========================================================================
+  std::string Package::GetObjectInfo() const 
+  {
+    std::stringstream i;
+    i << "  - "<<mDescriptorMap.size() << " boxes" << std::endl;
+    if (mDynamicLibraryHandler) 
+      {
+	i<< "  - Loaded from dynamic library"<<std::endl;
+      }
+    return i.str();
+  }
+  //==========================================================================
+
+
+  //==========================================================================
+  size_t  Package::GetObjectSize() const 
+  {
+    size_t s = Superclass::GetObjectSize();
+    s += Package::GetObjectInternalSize();
+    return s;
   }
   //==========================================================================
+  //==========================================================================
+  size_t  Package::GetObjectInternalSize() const 
+  {
+    size_t s = sizeof(Package);
+    return s;
+  }
+  //==========================================================================
+  //==========================================================================
+  size_t  Package::GetObjectRecursiveSize() const 
+  {
+    size_t s = Superclass::GetObjectRecursiveSize();
+    s += Package::GetObjectInternalSize();
+    
+    DescriptorMapType::const_iterator i;
+    for (i = mDescriptorMap.begin(); i!=mDescriptorMap.end(); ++i )
+      {
+	s += i->second->GetObjectRecursiveSize();
+      }
+    return s;
+  }
+  //==========================================================================
+  void  Package::GetBoxesInside(NodeTreeC& tree, int cont) 
+  {
+		DescriptorMapType::const_iterator i;
+		std::cout<<"*********a********"<<std::endl;
+		for (i=mDescriptorMap.begin(); i!=mDescriptorMap.end(); ++i) 
+		{
+			i->second->GetBoxesInside(tree, cont);
+			std::cout<<"*****************"<<std::endl;
+		}    
+  }
+	//==========================================================================
+  //==========================================================================
+  std::set<Package::WeakPointer> 
+  Package::mReleasedDynamicallyLoadedPackages;
+  //==========================================================================
+
 }