INodeUtils.h

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// ************************************************************************** //
//
//  BornAgain: simulate and fit scattering at grazing incidence
//
//! @file      Core/Export/INodeUtils.h
//! @brief     Defines namespace INodeUtils.
//!
//! @homepage  http://www.bornagainproject.org
//! @license   GNU General Public License v3 or higher (see COPYING)
//! @copyright Forschungszentrum Jülich GmbH 2018
//! @authors   Scientific Computing Group at MLZ (see CITATION, AUTHORS)
//
// ************************************************************************** //
 
#ifndef BORNAGAIN_CORE_EXPORT_INODEUTILS_H
#define BORNAGAIN_CORE_EXPORT_INODEUTILS_H
 
#include "Param/Node/INode.h"
 
namespace INodeUtils
{
template <typename T> std::vector<const T*> ChildNodesOfType(const INode& node)
{
    std::vector<const T*> result;
    for (const auto& p_child : node.getChildren()) {
        if (const auto* t = dynamic_cast<const T*>(p_child))
            result.push_back(t);
    }
    return result;
}
 
template <typename T> const T* OnlyChildOfType(const INode& node)
{
    const auto list = ChildNodesOfType<T>(node);
    if (list.size() != 1)
        return nullptr;
    return list.front();
}
 
template <typename T> std::vector<const T*> AllDescendantsOfType(const INode& node)
{
    std::vector<const T*> result;
    for (const auto* p_child : node.getChildren()) {
        if (const auto* t = dynamic_cast<const T*>(p_child))
            result.push_back(t);
        for (const auto* t : AllDescendantsOfType<T>(*p_child))
            result.push_back(t);
    }
    return result;
}
} // namespace INodeUtils
 
#endif // BORNAGAIN_CORE_EXPORT_INODEUTILS_H