Teuchos_TreeBuildingXMLHandler.hpp

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00001 // @HEADER
00002 // ***********************************************************************
00003 // 
00004 //                    Teuchos: Common Tools Package
00005 //                 Copyright (2004) Sandia Corporation
00006 // 
00007 // Under terms of Contract DE-AC04-94AL85000, there is a non-exclusive
00008 // license for use of this work by or on behalf of the U.S. Government.
00009 // 
00010 // This library is free software; you can redistribute it and/or modify
00011 // it under the terms of the GNU Lesser General Public License as
00012 // published by the Free Software Foundation; either version 2.1 of the
00013 // License, or (at your option) any later version.
00014 //  
00015 // This library is distributed in the hope that it will be useful, but
00016 // WITHOUT ANY WARRANTY; without even the implied warranty of
00017 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00018 // Lesser General Public License for more details.
00019 //  
00020 // You should have received a copy of the GNU Lesser General Public
00021 // License along with this library; if not, write to the Free Software
00022 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
00023 // USA
00024 // Questions? Contact Michael A. Heroux (maherou@sandia.gov) 
00025 // 
00026 // ***********************************************************************
00027 // @HEADER
00028 
00029 #ifndef Teuchos_TREEBUILDINGXMLHANDLER_H
00030 #define Teuchos_TREEBUILDINGXMLHANDLER_H
00031 
00036 #include "Teuchos_ConfigDefs.hpp"
00037 #include "Teuchos_XMLObject.hpp"
00038 #include <list>
00039 #include <stack>
00040 
00041 
00042 namespace Teuchos
00043 {
00044 
00048   class TreeBuildingXMLHandler
00049     {
00050       typedef Teuchos::map<std::string, std::string> Map;
00051     public:
00053       TreeBuildingXMLHandler();
00054 
00056       const XMLObject& getObject() const
00057         {
00058           // valid XML requires a root object; we will allow empty XML files
00059           TEST_FOR_EXCEPTION(
00060             root_.isEmpty(), EmptyXMLError
00061             ,"Error, An empty XML std::string or file was specified!"
00062             "  The XML specification requires at minimum the presence"
00063             " of a root element!" );
00064           return root_.getChild(0);
00065         }
00066 
00068       void characters(const std::string& chars);
00069 
00071       int endElement(const std::string& tag);
00072 
00074       void startElement(const std::string& tag,
00075                         const Map& attributes);
00076 
00077     private:
00078       XMLObject root_;
00079       XMLObject current_;
00080       std::stack<XMLObject> path_;
00081     };
00082 }
00083 
00084 
00085 #endif
00086 
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