// CompoundDatasetMergerCreator.h

#ifndef dset__CompoundDatasetMergerCreator_H
#define dset__CompoundDatasetMergerCreator_H

// Factory to create simple dataset splitters.
//
// XML:
//
// CompoundDatasetMergerCreator

#include "dataset_util/Text.h"
#include "dataset_split/DatasetMergerCreator.h"

namespace dset {

class CompoundDatasetMergerCreator : public DatasetMergerCreator {

private:  // data

public:  // static functions

  // Return the XML name.
  static const char* xml_name() { return "CompoundDatasetMergerCreator"; }

  // DTD.
  static const Text& dtd();

public:  // Constructors.
  
  // Constructor from working directory name.
  CompoundDatasetMergerCreator();

public:  // Virtual methods

  // Validity.
  bool is_valid() const;

  // Return a new merger instance.
  // Caller is responsible for management.
  DatasetMerger* create(std::string dir) const;

  // Write to XML.
  virtual const XmlElement* xml() const;

  // Output stream.
  virtual std::ostream& ostr(std::ostream& str) const;

};

}  // end namespace dset

#endif