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#ifndef XMLVISITORS_H
#define XMLVISITORS_H
#include <iosfwd>
#include "XMLElements.h"
//----------------------------------------------------------------------------
/**
* Base class for all XML visitors.
*/
class XMLVisitor
{
public:
//------------------------------------------------------------------------
virtual ~XMLVisitor() {}
//------------------------------------------------------------------------
inline void visit(XMLProperty *p) { do_visit(p); }
inline void visit(XMLText *t) { do_visit(t); }
inline void visit(XMLNode *n) { do_visit(n); }
protected:
//------------------------------------------------------------------------
XMLVisitor() {}
private:
//------------------------------------------------------------------------
virtual void do_visit(XMLProperty *p) {}
virtual void do_visit(XMLText *t) {}
virtual void do_visit(XMLNode *n) {}
};
//----------------------------------------------------------------------------
/**
* Base class for all XML const visitors.
*/
class XMLConstVisitor
{
public:
//------------------------------------------------------------------------
virtual ~XMLConstVisitor() {}
//------------------------------------------------------------------------
inline void visit(const XMLProperty *p) { do_visit(p); }
inline void visit(const XMLText *t) { do_visit(t); }
inline void visit(const XMLNode *n) { do_visit(n); }
protected:
//------------------------------------------------------------------------
XMLConstVisitor() {}
private:
//------------------------------------------------------------------------
virtual void do_visit(const XMLProperty *p) {}
virtual void do_visit(const XMLText *t) {}
virtual void do_visit(const XMLNode *n) {}
};
//----------------------------------------------------------------------------
/**
* This visitor is used to write the content of an XMLNode to a file.
*/
class XMLWriteToStreamVisitor : public XMLConstVisitor
{
public:
//------------------------------------------------------------------------
/**
* @param os The stream to write to.
*/
XMLWriteToStreamVisitor(std::ostream &os);
~XMLWriteToStreamVisitor();
private:
//------------------------------------------------------------------------
void do_visit(const XMLProperty *p);
void do_visit(const XMLText *t);
void do_visit(const XMLNode *n);
void writeIndentation();
//------------------------------------------------------------------------
std::ostream &m_os;
int m_level;
};
#endif //XMLVISITORS_H
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