// 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 <IFSelect_SelectDeduct.hxx>
#include <IFSelect_Selection.hxx>
#include <IFSelect_SelectionIterator.hxx>
#include <IFSelect_SelectPointed.hxx>
#include <Interface_EntityIterator.hxx>
#include <Interface_Graph.hxx>
#include <Standard_Type.hxx>

IMPLEMENT_STANDARD_RTTIEXT(IFSelect_SelectDeduct, IFSelect_Selection)

void IFSelect_SelectDeduct::SetInput(const occ::handle<IFSelect_Selection>& sel)
{
  thesel = sel;
}

occ::handle<IFSelect_Selection> IFSelect_SelectDeduct::Input() const
{
  return thesel;
}

bool IFSelect_SelectDeduct::HasInput() const
{
  return (!thesel.IsNull());
}

bool IFSelect_SelectDeduct::HasAlternate() const
{
  if (!thealt.IsNull())
    return thealt->IsSet();
  return false;
}

occ::handle<IFSelect_SelectPointed>& IFSelect_SelectDeduct::Alternate()
{
  if (thealt.IsNull())
    thealt = new IFSelect_SelectPointed;
  return thealt;
}

Interface_EntityIterator IFSelect_SelectDeduct::InputResult(const Interface_Graph& G) const
{
  Interface_EntityIterator res;
  if (!thealt.IsNull())
  {
    if (thealt->IsSet())
    {
      res = thealt->UniqueResult(G);
      thealt->Clear();
      return res;
    }
  }
  if (thesel.IsNull())
    return res;
  return thesel->UniqueResult(G);
}

void IFSelect_SelectDeduct::FillIterator(IFSelect_SelectionIterator& iter) const
{
  iter.AddItem(thesel);
}
