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LatAnalyze/lib/XmlReader.hpp

85 lines
2.8 KiB
C++

/*
* XmlReader.hpp, part of LatAnalyze 3
*
* Copyright (C) 2013 - 2014 Antonin Portelli
*
* LatAnalyze 3 is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* LatAnalyze 3 is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with LatAnalyze 3. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef Latan_XmlReader_hpp_
#define Latan_XmlReader_hpp_
#include <LatAnalyze/Global.hpp>
#include <LatAnalyze/XML/tinyxml2.hpp>
#include <iostream>
BEGIN_NAMESPACE
/******************************************************************************
* XML parameter file reader *
******************************************************************************/
class XmlReader
{
public:
// constructor
XmlReader(void) = default;
explicit XmlReader(const std::string &fileName);
// destructor
virtual ~XmlReader(void) = default;
// IO
template <typename T, typename... Strs>
T getFirstValue(const std::string &nodeName, Strs... nodeNames);
void open(const std::string &fileName);
private:
std::string name_;
tinyxml2::XMLDocument doc_;
tinyxml2::XMLElement *root_{nullptr};
};
/******************************************************************************
* XmlReader template implementation *
******************************************************************************/
template <typename T, typename... Strs>
T XmlReader::getFirstValue(const std::string &nodeName, Strs... nodeNames)
{
static_assert(static_or<std::is_assignable<std::string, Strs>::value...>::value,
"getFirstValue arguments are not compatible with std::string");
const unsigned int nName = sizeof...(nodeNames) + 1;
const std::string name[] = {nodeName, nodeNames...};
tinyxml2::XMLElement *node = root_;
if (!root_)
{
LATAN_ERROR(Io, "no XML file opened");
}
//std::cout << "root: " << name[i] << " ";
for (unsigned int i = 0; i < nName; ++i)
{
//std::cout << i << ": " << name[i] << " ";
node = node->FirstChildElement(name[i].c_str());
// std::cout <<
if (!node)
{
LATAN_ERROR(Parsing, "XML node " + name[i] + " not found");
}
}
return strTo<T>(node->GetText());
}
END_NAMESPACE
#endif // Latan_XmlReader_hpp_