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// This is mul/mbl/mbl_data_collector_base.h
#ifndef mbl_data_collector_base_h_
#define mbl_data_collector_base_h_
#ifdef VCL_NEEDS_PRAGMA_INTERFACE
#pragma interface
#endif
//:
// \file
// \author Tim Cootes
// \brief Non-templated base class for mbl_data_collector<T>
#include <vsl/vsl_binary_io.h>
#include <vcl_string.h>
#include <vcl_iosfwd.h>
//: Non-templated base class for mbl_data_collector<T>
// Provided mainly because the Visual C++ compiler can't cope with
// the double template instantiation for the binary IO
class mbl_data_collector_base
{
public:
//: Dflt ctor
mbl_data_collector_base();
//: Destructor
virtual ~mbl_data_collector_base();
//: Name of the class
virtual vcl_string is_a() const;
//: Does the name of the class match the argument?
virtual bool is_class(vcl_string const& s) const;
//: Create a copy on the heap and return base class pointer
virtual mbl_data_collector_base* clone() const = 0;
//: Print class to os
virtual void print_summary(vcl_ostream& os) const = 0;
//: Save class to binary file stream
virtual void b_write(vsl_b_ostream& bfs) const = 0;
//: Load class from binary file stream
virtual void b_read(vsl_b_istream& bfs) = 0;
};
//: Allows derived class to be loaded by base-class pointer
// A loader object exists which is invoked by calls
// of the form "vsl_b_read(bfs,base_ptr);". This loads derived class
// objects from the disk, places them on the heap and
// returns a base class pointer.
// In order to work the loader object requires
// an instance of each derived class that might be
// found. This function gives the model class to
// the appropriate loader.
void vsl_add_to_binary_loader(const mbl_data_collector_base& b);
//: Binary file stream output operator for class reference
void vsl_b_write(vsl_b_ostream& bfs, const mbl_data_collector_base& b);
//: Binary file stream input operator for class reference
void vsl_b_read(vsl_b_istream& bfs, mbl_data_collector_base& b);
//: Stream output operator for class reference
vcl_ostream& operator<<(vcl_ostream& os,const mbl_data_collector_base& b);
//: Stream output operator for class pointer
vcl_ostream& operator<<(vcl_ostream& os,const mbl_data_collector_base* b);
#endif // mbl_data_collector_base_h_
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