BaseProperty.hh

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\*===========================================================================*/

#ifndef OPENMESH_BASEPROPERTY_HH
#define OPENMESH_BASEPROPERTY_HH

#include <string>
#include <OpenMesh/Core/IO/StoreRestore.hh>
#include <OpenMesh/Core/System/omstream.hh>

namespace OpenMesh {

//== CLASS DEFINITION =========================================================

class OPENMESHDLLEXPORT BaseProperty
{
public:

  static const size_t UnknownSize = size_t(-1);

public:

  BaseProperty(const std::string& _name = "<unknown>")
  : name_(_name), persistent_(false)
  {}

  BaseProperty(const BaseProperty & _rhs)
      : name_( _rhs.name_ ), persistent_( _rhs.persistent_ ) {}

  virtual ~BaseProperty() {}

public: // synchronized array interface

  virtual void reserve(size_t _n) = 0;

  virtual void resize(size_t _n) = 0;

  virtual void clear() = 0;

  virtual void push_back() = 0;

  virtual void swap(size_t _i0, size_t _i1) = 0;

  virtual void copy(size_t _io, size_t _i1) = 0;
  
  virtual BaseProperty* clone () const = 0;

public: // named property interface

  const std::string& name() const { return name_; }

  virtual void stats(std::ostream& _ostr) const;

public: // I/O support

  bool persistent(void) const { return persistent_; }

  virtual void set_persistent( bool _yn ) = 0;

  virtual size_t       n_elements() const = 0;

  virtual size_t       element_size() const = 0;

  virtual size_t       size_of() const
  {
    return size_of( n_elements() );
  }

  virtual size_t       size_of(size_t _n_elem) const
  {
    return (element_size()!=UnknownSize)
      ? (_n_elem*element_size())
      : UnknownSize;
  }

  virtual size_t store( std::ostream& _ostr, bool _swap ) const = 0;

  virtual size_t restore( std::istream& _istr, bool _swap ) = 0;

protected:

  // To be used in a derived class, when overloading set_persistent()
  template < typename T >
  void check_and_set_persistent( bool _yn )
  {
    if ( _yn && !IO::is_streamable<T>() )
      omerr() << "Warning! Type of property value is not binary storable!\n";
    persistent_ = IO::is_streamable<T>() && _yn;
  }

private:

  std::string name_;
  bool        persistent_;
};

}//namespace OpenMesh

#endif //OPENMESH_BASEPROPERTY_HH