// DefaultDatasetMergerCreator.cxx

#include "dataset_split/DefaultDatasetMergerCreator.h"
#include <iostream>
#include "dataset_util/XmlElement.h"
#include "dataset_util/DtdRegistry.h"
#include "dataset_split/DefaultDatasetMerger.h"

using std::string;
using std::ostream;
using std::auto_ptr;
using dset::DatasetMerger;
using dset::DatasetMergerCreator;
using dset::DefaultDatasetMerger;
using dset::DefaultDatasetMergerCreator;

//**********************************************************************
// Local definitions.
//**********************************************************************

namespace {

// Creator.
const DatasetMergerCreator* create(const XmlElement& ele) {
  assert( ele.name() == DefaultDatasetMergerCreator::xml_name() );
  if ( ele.name() != DefaultDatasetMergerCreator::xml_name() ) return 0;
  return new DefaultDatasetMergerCreator;
}

// Register creator.
int DefaultDatasetMergerCreator_xml_stat =
  DatasetMergerCreator::register_creator(
    DefaultDatasetMergerCreator::xml_name(), create);

// Register the DTD.
DtdRegistry::Status DefaultDatasetMerger_dtd_stat =
  DtdRegistry::register_dtd<DefaultDatasetMergerCreator>("dataset");

}  // end unnamed namespace.

//**********************************************************************
// Static member functions
//**********************************************************************

// DTD

const Text& DefaultDatasetMergerCreator::dtd() {
  static Text txt;
  if ( txt.size() == 0 ) {
    txt.append("<!ELEMENT DefaultDatasetMergerCreator EMPTY>");
  }
  return txt;
}

//**********************************************************************
// Member functions
//**********************************************************************

// Constructor.

DefaultDatasetMergerCreator::DefaultDatasetMergerCreator() { }

//**********************************************************************

// Validity

bool DefaultDatasetMergerCreator::is_valid() const {
  return true;
}

//**********************************************************************

// Return a new merger instance.

DatasetMerger* DefaultDatasetMergerCreator::create(string dir) const {
  return new DefaultDatasetMerger(dir);
}

//**********************************************************************

// Write to XML.

const XmlElement* DefaultDatasetMergerCreator::xml() const {
  auto_ptr<XmlElement>
    pele(new XmlElement(DefaultDatasetMergerCreator::xml_name()));
  return pele.release();
}

//**********************************************************************

// Output stream.

ostream& DefaultDatasetMergerCreator::ostr(std::ostream& str) const {
  str << "Default dataset merger creator";
  return str;
}

//**********************************************************************