//                                               -*- C++ -*-
/**
 *  @brief This an abstract class for 1D function factories
 *
 *  Copyright 2005-2026 Airbus-EDF-IMACS-ONERA-Phimeca
 *
 *  This library is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Lesser General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with this library.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
#ifndef OPENTURNS_UNIVARIATEFUNCTIONFACTORY_HXX
#define OPENTURNS_UNIVARIATEFUNCTIONFACTORY_HXX

#include "openturns/PersistentObject.hxx"
#include "openturns/Collection.hxx"
#include "openturns/UniVariateFunction.hxx"

BEGIN_NAMESPACE_OPENTURNS



/**
 * @class UniVariateFunctionFactory
 *
 * This an abstract class for 1D function factories
 */

class OT_API UniVariateFunctionFactory
  : public PersistentObject
{
  CLASSNAME

public:

  typedef Collection<UniVariateFunction> UniVariateFunctionCollection;

  /** Virtual constructor */
  UniVariateFunctionFactory * clone() const override;

  /** String converter */
  String __repr__() const override;

  /** The method to get the function of any order. */
  virtual UniVariateFunction build(const UnsignedInteger order) const;

  /** Method save() stores the object through the StorageManager */
  void save(Advocate & adv) const override;

  /** Method load() reloads the object from the StorageManager */
  void load(Advocate & adv) override;

  /** Default constructor */
  UniVariateFunctionFactory();

protected:

  friend class Factory<UniVariateFunctionFactory>;

  /** Cache initialization */
  virtual void initializeCache();

  /** A cache to save already computed functions */
  mutable UniVariateFunctionCollection functionsCache_;
} ; /* class UniVariateFunctionFactory */


END_NAMESPACE_OPENTURNS

#endif /* OPENTURNS_UNIVARIATEFUNCTIONFACTORY_HXX */
