LocationVisitor.hpp

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#ifndef LocationVisitor_H
#define LocationVisitor_H

#include "NamedLoc.hpp"
#include "UnnamedLoc.hpp"
#include "InvisibleLoc.hpp"
#include "UnknownLoc.hpp"
#include "LocSubSet.hpp"
#include "LocIdxSubSet.hpp"
#include "LocFieldSubSet.hpp"
namespace OA {

//--------------------------------------------------------------------
class LocationVisitor {
protected:
  LocationVisitor() {}
public:
  virtual ~LocationVisitor() {}

  //---------------------------------------
  // methods for each Location subclasses
  //---------------------------------------
  
  virtual void visitNamedLoc(NamedLoc& loc) = 0;
  virtual void visitUnnamedLoc(UnnamedLoc& loc) = 0;
  virtual void visitInvisibleLoc(InvisibleLoc& loc) = 0;
  virtual void visitUnknownLoc(UnknownLoc& loc) = 0;

  // default LocSubSet base class so that visitors can handle 
  // LocSubSet sub-classes added later in a generic fasion
  // and direct instances of LocSubSet
  virtual void visitLocSubSet(LocSubSet& loc) = 0;

  // each subclass of LocSubSet should call visitLocSubSet
  // as default
  virtual void visitLocIdxSubSet(LocIdxSubSet& loc);
  virtual void visitLocFieldSubSet(LocFieldSubSet& loc);
};

} // end of OA namespace

#endif