Teuchos_TreeBuildingXMLHandler.cpp

Go to the documentation of this file.

// @HEADER
// ***********************************************************************
//
//                    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.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// 3. Neither the name of the Corporation nor the names of the
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY SANDIA CORPORATION "AS IS" AND ANY
// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
// PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL SANDIA CORPORATION OR THE
// CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// Questions? Contact Michael A. Heroux (maherou@sandia.gov)
//
// ***********************************************************************
// @HEADER
 
#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");
 
  size_t k = current_.numContentLines();
  // a new line indicates the start of a new ContentLine. Only add it if current line is not empty.
  if(chars.compare("\n")==0) {
    if((k>0) && (current_.getContentLine(k-1).length()>0))
      current_.addContent("");
  } else {
    // If no contentLine exists to append create one, else add to the last contentLine
    // Do not add white characters at the start of a new line
    if(k==0) {
      if(!StrUtils::isWhite(chars))
        current_.addContent(StrUtils::fixUnprintableCharacters(chars));
    } else {
      if((!StrUtils::isWhite(chars)) || (current_.getContentLine(k-1).length()>0))
        current_.appendContentLine(k-1,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
      }
      // remove empty contentLines at the end.
      size_t k = current_.numContentLines();
      while( (k>0) && (current_.getContentLine(--k).length() == 0))
        current_.removeContentLine(k);
 
      current_ = path_.top();
      path_.pop();
    }
  else
    {
      error = 1; // error: cannot end element that wasn't started
    }
  return error;
}