XercesUtil.h

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#ifndef _utl_XercesUtil_h_
#define _utl_XercesUtil_h_

#include <xercesc/util/XMLString.hpp>
#include <xercesc/dom/DOMLSSerializer.hpp>


namespace utl {

  namespace detail {

    template<class T>
    inline
    void
    Release(T*& p)
    {
      if (!p->getOwnerDocument())
        p->release();
    }

    template<>
    inline void Release(char*& p) { xercesc::XMLString::release(&p); }

    template<>
    inline void Release(XMLCh*& p) { xercesc::XMLString::release(&p); }

    template<>
    inline void Release(xercesc::DOMLSSerializer*& p) { p->release(); }

  }


  template<class T>
  class XercesPtr {

  public:
    XercesPtr() = default;

    explicit XercesPtr(T* const p) : fPtr(p) { }

    ~XercesPtr() { Release(); }

    T* Get() { return fPtr; }
    const T* Get() const { return fPtr; }

    T& operator*() { return *fPtr; }
    const T& operator*() const { return *fPtr; }

    T* operator->() { return fPtr; }
    const T* operator->() const { return fPtr; }

  private:
    XercesPtr(const XercesPtr&);  // no copy
    XercesPtr& operator=(const XercesPtr&);  // no copy

    void Release() { if (fPtr) detail::Release(fPtr); fPtr = nullptr; }

    T* fPtr = nullptr;

  };

  typedef XercesPtr<char> XercesPtrC;
  typedef XercesPtr<XMLCh> XercesPtrX;


  //


  inline
  std::string
  AsString(const XMLCh* const xStr)
  {
    return XercesPtrC(xercesc::XMLString::transcode(xStr)).Get();
  }

}


#endif