// Created on: 2001-06-26
// Created by: Alexander GRIGORIEV
// Copyright (c) 2001-2014 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.

#ifndef LDOM_BasicNode_HeaderFile
#define LDOM_BasicNode_HeaderFile

#include <LDOM_Node.hxx>

class LDOM_BasicElement;
class LDOM_NullPtr;
class LDOMParser;

//  Block of comments describing class LDOM_BasicNode
//

class LDOM_BasicNode 
{
 public:
  DEFINE_STANDARD_ALLOC

 public:

  Standard_Boolean  isNull    () const {return myNodeType ==LDOM_Node::UNKNOWN;}

  LDOM_Node::NodeType getNodeType () const { return myNodeType; }

  Standard_EXPORT const LDOM_BasicNode * GetSibling () const;

 protected:
  // ---------- PROTECTED METHODS ----------

  LDOM_BasicNode () : myNodeType (LDOM_Node::UNKNOWN), mySibling (NULL) {}
  //    Empty constructor

  LDOM_BasicNode (LDOM_Node::NodeType aType)
    : myNodeType (aType), mySibling (NULL) {}
  //    Constructor

  LDOM_BasicNode (const LDOM_BasicNode& anOther)
    : myNodeType (anOther.getNodeType()), mySibling (anOther.GetSibling()) {}
  //    Copy constructor

  LDOM_BasicNode& operator =    (const LDOM_NullPtr * )
                              { myNodeType = LDOM_Node::UNKNOWN; return *this; }

  Standard_EXPORT LDOM_BasicNode& operator = (const LDOM_BasicNode& anOther);

  void SetSibling (const LDOM_BasicNode * anOther)      { mySibling = anOther; }

 protected:
  friend class LDOM_BasicElement;
  friend class LDOM_Node;
  friend class LDOMParser;
  // ---------- PROTECTED FIELDSS ----------

  LDOM_Node::NodeType   myNodeType;
  const LDOM_BasicNode  * mySibling;
};

#endif
