Wrapper.h

/*
 * #%L
 * OME-XERCES C++ library for working with Xerces C++.
 * %%
 * Copyright © 2006 - 2016 Open Microscopy Environment:
 *   - Massachusetts Institute of Technology
 *   - National Institutes of Health
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 * %%
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 * 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.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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#ifndef OME_COMMON_XML_DOM_WRAPPER_H
#define OME_COMMON_XML_DOM_WRAPPER_H

#include <ome/common/config.h>

#include <ome/compat/memory.h>

#include <ome/common/xml/dom/Base.h>

#include <string>
#include <stdexcept>

namespace ome
{
  namespace common
  {
    namespace xml
    {
      namespace dom
      {

        template<typename WrappedType, typename Parent>
        class Wrapper : public Parent
        {
        public:
          typedef Parent parent_type;
          typedef typename parent_type::base_type base_type;
          typedef typename parent_type::base_element_type base_element_type;
          typedef WrappedType element_type;

          Wrapper ():
            parent_type(),
            wrapped()
          {
          }

          Wrapper (const base_type& base):
            parent_type(),
            wrapped()
          {
            assign(base);
          }

          template<typename Deleter>
          explicit
          Wrapper (typename parent_type::base_element_type *base,
                   Deleter                                  del):
            parent_type(),
            wrapped()
          {
            ome::compat::shared_ptr<base_element_type> pbase;
            if (base)
              pbase = ome::compat::shared_ptr<base_element_type>(base, del);
            else
              pbase = ome::compat::shared_ptr<base_element_type>();
            assign(pbase);
          }

          explicit
          Wrapper (typename parent_type::base_element_type *base):
            parent_type(),
            wrapped()
          {
            ome::compat::shared_ptr<base_element_type> pbase;
            if (base)
              pbase = ome::compat::shared_ptr<base_element_type>(base, &ome::common::xml::dom::detail::unmanaged<base_element_type>);
            else
              pbase = ome::compat::shared_ptr<base_element_type>();
            assign(pbase);
          }

          ~Wrapper ()
          {
          }

          element_type*
          get()
          {
            return wrapped;
          }

          const element_type*
          get() const
          {
            return wrapped;
          }

        protected:
          virtual
          void
          assign(const base_type& wrapped)
          {
            this->wrapped = this->template assign_check<element_type>(const_cast<base_element_type *>(wrapped.get()));
            parent_type::assign(wrapped);
          }

          virtual
          void
          assign(ome::compat::shared_ptr<base_element_type>& wrapped)
          {
            this->wrapped = this->template assign_check<element_type>(wrapped.get());
            parent_type::assign(wrapped);
          }

        public:
          Wrapper&
          operator= (const Wrapper& wrapped)
          {
            assign(wrapped);
            return *this;
          }

          element_type&
          operator* () noexcept
          {
            this->null_check();
            return *wrapped;
          }

          const element_type&
          operator* () const noexcept
          {
            this->null_check();
            return *wrapped;
          }

          element_type *
          operator-> () noexcept
          {
            this->null_check();
            return wrapped;
          }

          const element_type *
          operator-> () const noexcept
          {
            this->null_check();
            return wrapped;
          }

        private:
          element_type *wrapped;
        };

      }
    }
  }
}

#endif // OME_COMMON_XML_DOM_WRAPPER_H

/*
 * Local Variables:
 * mode:C++
 * End:
 */