Teuchos_TreeBuildingXMLHandler.cpp

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//                    Teuchos: Common Tools Package
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#include "Teuchos_TreeBuildingXMLHandler.hpp"
#include "Teuchos_StrUtils.hpp"
#include "Teuchos_Assert.hpp"

using namespace Teuchos;

TreeBuildingXMLHandler::TreeBuildingXMLHandler()
  : root_(), current_(), path_()
{ 
  current_ = root_;
}

void TreeBuildingXMLHandler::characters(const std::string& chars)
{
  TEUCHOS_TEST_FOR_EXCEPTION(current_.isEmpty(), std::logic_error,
                     "TreeBuildingXMLHandler::trying to add content to an empty node");
                        
  current_.addContent(StrUtils::fixUnprintableCharacters(chars));
}

void TreeBuildingXMLHandler::startElement(const std::string& tag, 
                                          const Map& attributes)
{
  XMLObject parent;
  
  if (current_.isEmpty()) 
    {
      root_ = XMLObject("root");
      current_ = root_;
    }
  parent = current_;
  path_.push(current_);
  current_ = XMLObject(tag);
  parent.addChild(current_);

  for (Map::const_iterator i=attributes.begin(); i != attributes.end(); ++i)
    {
      const std::string& key = (*i).first;
      const std::string& val = (*i).second;
      current_.addAttribute(key, val);
    }
}

int TreeBuildingXMLHandler::endElement(const std::string& tag)
{
  int error = 0;
  if (path_.size() > 0)
    {
      if (current_.getTag() != tag) {
        error = 1; // error: tags must be balanced
      }
      current_ = path_.top();
      path_.pop();
    }
  else 
    {
      error = 1; // error: cannot end element that wasn't started
    }
  return error;
}