// Created on: 2007-03-30
// Created by: Michael SAZONOV
// Copyright (c) 2007-2014 OPEN CASCADE SAS
//
// This file is part of Open CASCADE Technology software library.
//
// This library is free software; you can redistribute it and/or modify it under
// the terms of the GNU Lesser General Public License version 2.1 as published
// by the Free Software Foundation, with special exception defined in the file
// OCCT_LGPL_EXCEPTION.txt. Consult the file LICENSE_LGPL_21.txt included in OCCT
// distribution for complete text of the license and disclaimer of any warranty.
//
// Alternatively, this file may be used under the terms of Open CASCADE
// commercial license or contractual agreement.

// The original implementation Copyright: (C) RINA S.p.A

#include <BinTObjDrivers_IntSparseArrayDriver.hxx>
#include <CDM_MessageDriver.hxx>
#include <TDF_Attribute.hxx>
#include <BinObjMgt_Persistent.hxx>
#include <TObj_TIntSparseArray.hxx>
#include <TObj_Assistant.hxx>
#include <TCollection_AsciiString.hxx>
#include <TDF_Tool.hxx>


//=======================================================================
//function : BinTObjDrivers_IntSparseArrayDriver
//purpose  : constructor
//=======================================================================

BinTObjDrivers_IntSparseArrayDriver::BinTObjDrivers_IntSparseArrayDriver
                         (const Handle(CDM_MessageDriver)& theMessageDriver)
: BinMDF_ADriver( theMessageDriver, NULL)
{
}

//=======================================================================
//function : NewEmpty
//purpose  : Creates a new attribute
//=======================================================================

Handle(TDF_Attribute) BinTObjDrivers_IntSparseArrayDriver::NewEmpty() const
{
  return new TObj_TIntSparseArray;
}

//=======================================================================
//function : Paste
//purpose  : Retrieve. Translate the contents of <theSource> and put it
//           into <theTarget>.
//=======================================================================

Standard_Boolean BinTObjDrivers_IntSparseArrayDriver::Paste
                         (const BinObjMgt_Persistent&  theSource,
                          const Handle(TDF_Attribute)& theTarget,
                          BinObjMgt_RRelocationTable&) const
{
  Handle(TObj_TIntSparseArray) aTarget =
    Handle(TObj_TIntSparseArray)::DownCast(theTarget);

  // get pairs (ID, value) while ID != 0
  Standard_Integer anId;
  if (!(theSource >> anId) || anId < 0)
    return Standard_False;
  while (anId)
  {
    Standard_Integer aValue;
    if (!(theSource >> aValue) || aValue <= 0)
      return Standard_False;

    // store the value in the target array
    aTarget->SetDoBackup (Standard_False);
    aTarget->SetValue (anId, aValue);
    aTarget->SetDoBackup (Standard_True);

    // get next ID
    if (!(theSource >> anId) || anId < 0)
      return Standard_False;
  }
  return Standard_True;
}

//=======================================================================
//function : Paste
//purpose  : Store. Translate the contents of <theSource> and put it
//           into <theTarget>
//=======================================================================

void BinTObjDrivers_IntSparseArrayDriver::Paste
                         (const Handle(TDF_Attribute)& theSource,
                          BinObjMgt_Persistent&        theTarget,
                          BinObjMgt_SRelocationTable&) const
{
  Handle(TObj_TIntSparseArray) aSource =
    Handle(TObj_TIntSparseArray)::DownCast (theSource);

  // put only non-null values as pairs (ID, value)
  // terminate the list by ID=0
  TObj_TIntSparseArray::Iterator anIt = aSource->GetIterator();
  for ( ; anIt.More() ; anIt.Next() )
  {
    Standard_Integer aValue = anIt.Value();
    if (aValue == 0)
      continue;
    
    // store ID and value
    theTarget << (Standard_Integer) anIt.Index() << aValue;
  }
  // zero indicates end of the entities
  theTarget << (Standard_Integer) 0;
}