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Teuchos_TreeBuildingXMLHandler.cpp
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00004 //                    Teuchos: Common Tools Package
00005 //                 Copyright (2004) Sandia Corporation
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00011 // modification, are permitted provided that the following conditions are
00012 // met:
00013 //
00014 // 1. Redistributions of source code must retain the above copyright
00015 // notice, this list of conditions and the following disclaimer.
00016 //
00017 // 2. Redistributions in binary form must reproduce the above copyright
00018 // notice, this list of conditions and the following disclaimer in the
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00022 // contributors may be used to endorse or promote products derived from
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00025 // THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
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00041 
00042 #include "Teuchos_TreeBuildingXMLHandler.hpp"
00043 #include "Teuchos_StrUtils.hpp"
00044 #include "Teuchos_TestForException.hpp"
00045 
00046 using namespace Teuchos;
00047 
00048 TreeBuildingXMLHandler::TreeBuildingXMLHandler()
00049   : root_(), current_(), path_()
00050 { 
00051   current_ = root_;
00052 }
00053 
00054 void TreeBuildingXMLHandler::characters(const std::string& chars)
00055 {
00056   TEST_FOR_EXCEPTION(current_.isEmpty(), std::logic_error,
00057                      "TreeBuildingXMLHandler::trying to add content to an empty node");
00058                         
00059   current_.addContent(StrUtils::fixUnprintableCharacters(chars));
00060 }
00061 
00062 void TreeBuildingXMLHandler::startElement(const std::string& tag, 
00063                                           const Map& attributes)
00064 {
00065   XMLObject parent;
00066   
00067   if (current_.isEmpty()) 
00068     {
00069       root_ = XMLObject("root");
00070       current_ = root_;
00071     }
00072   parent = current_;
00073   path_.push(current_);
00074   current_ = XMLObject(tag);
00075   parent.addChild(current_);
00076 
00077   for (Map::const_iterator i=attributes.begin(); i != attributes.end(); ++i)
00078     {
00079       const std::string& key = (*i).first;
00080       const std::string& val = (*i).second;
00081       current_.addAttribute(key, val);
00082     }
00083 }
00084 
00085 int TreeBuildingXMLHandler::endElement(const std::string& tag)
00086 {
00087   int error = 0;
00088   if (path_.size() > 0)
00089     {
00090       if (current_.getTag() != tag) {
00091         error = 1; // error: tags must be balanced
00092       }
00093       current_ = path_.top();
00094       path_.pop();
00095     }
00096   else 
00097     {
00098       error = 1; // error: cannot end element that wasn't started
00099     }
00100   return error;
00101 }
00102 
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