0027104: DownCast() cannot return null for mismatched handle

[occt.git] / src / IGESSelect / IGESSelect_SignLevelNumber.cxx

// Copyright (c) 1999-2014 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.


#include <IGESData_IGESEntity.hxx>
#include <IGESGraph_DefinitionLevel.hxx>
#include <IGESSelect_SignLevelNumber.hxx>
#include <Interface_InterfaceModel.hxx>
#include <Interface_Macros.hxx>
#include <Standard_Transient.hxx>
#include <Standard_Type.hxx>
#include <TCollection_AsciiString.hxx>

#include <stdio.h>
IMPLEMENT_STANDARD_RTTIEXT(IGESSelect_SignLevelNumber,IFSelect_Signature)

static TCollection_AsciiString laval;


    IGESSelect_SignLevelNumber::IGESSelect_SignLevelNumber
  (const Standard_Boolean countmode)
    : IFSelect_Signature ("Level Number") ,
      thecountmode (countmode)    {  }

    Standard_CString  IGESSelect_SignLevelNumber::Value
  (const Handle(Standard_Transient)& ent,
   const Handle(Interface_InterfaceModel)& /* model */) const
{
  char carlev[20];
  DeclareAndCast(IGESData_IGESEntity,igesent,ent);
//JR/Hp
  if (igesent.IsNull()) {
    Standard_CString astr ;
    astr = (Standard_CString ) (thecountmode ? " NO LEVEL" : "/0/");
    return astr ;
  }
//  if (igesent.IsNull()) return (thecountmode ? " NO LEVEL" : "/0/");
  DeclareAndCast(IGESGraph_DefinitionLevel,levelist,igesent->LevelList());
  Standard_Integer level = igesent->Level();

  if (levelist.IsNull()) {
//JR/Hp
    if (level < 0) {
      Standard_CString astr ;
      astr = (Standard_CString ) (thecountmode ? " NO LEVEL" : "/0/") ;
      return astr ;
    }
//    if (level < 0) return (thecountmode ? " NO LEVEL" : "/0/");
    laval.Clear();
    if (thecountmode) sprintf (carlev,"%7d",level);
    else sprintf (carlev,"/%d/",level);
    laval.AssignCat (carlev);
  }
  else if (thecountmode) return "LEVEL LIST";
  else {
    Standard_Integer i, nblev = levelist->NbLevelNumbers();
    laval.Clear();
    laval.AssignCat("LIST:/");
    for (i = 1; i <= nblev; i ++) {
      sprintf(carlev,"%d/",levelist->LevelNumber(i));
      laval.AssignCat(carlev);
    }
  }
  return laval.ToCString();
}