Teuchos_TreeBuildingXMLHandler.hpp

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// 
//                    Teuchos: Common Tools Package
//                 Copyright (2004) Sandia Corporation
// 
// Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
// license for use of this work by or on behalf of the U.S. Government.
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// This library is free software; you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as
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// Lesser General Public License for more details.
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// You should have received a copy of the GNU Lesser General Public
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#ifndef Teuchos_TREEBUILDINGXMLHANDLER_H
#define Teuchos_TREEBUILDINGXMLHANDLER_H

#include "Teuchos_ConfigDefs.hpp"
#include "Teuchos_XMLObject.hpp"
#include <list>
#include <stack>


namespace Teuchos
{

  class TreeBuildingXMLHandler
    {
      typedef Teuchos::map<std::string, std::string> Map;
    public:
      TreeBuildingXMLHandler();

      const XMLObject& getObject() const
        {
          // valid XML requires a root object; we will allow empty XML files
          TEST_FOR_EXCEPTION(
            root_.isEmpty(), EmptyXMLError
            ,"Error, An empty XML std::string or file was specified!"
            "  The XML specification requires at minimum the presence"
            " of a root element!" );
          return root_.getChild(0);
        }

      void characters(const std::string& chars);

      int endElement(const std::string& tag);

      void startElement(const std::string& tag,
                        const Map& attributes);

    private:
      XMLObject root_;
      XMLObject current_;
      std::stack<XMLObject> path_;
    };
}


#endif

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