text: /*********************************************************************************
   *
   * Inviwo - Interactive Visualization Workshop
   *
   * Copyright (c) 2016-2020 Inviwo Foundation
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are met:
   *
   * 1. Redistributions of source code must retain the above copyright notice, this
   * list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright notice,
   * this list of conditions and the following disclaimer in the documentation
   * and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
   * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
   * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
   * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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   *********************************************************************************/
  #pragma once
  
  #include <modules/animation/animationmoduledefine.h>
  #include <inviwo/core/common/inviwo.h>
  
  #include <modules/animation/interpolation/interpolation.h>
  
  namespace inviwo {
  namespace animation {
  
  class IVW_MODULE_ANIMATION_API InterpolationFactoryObject {
  public:
      InterpolationFactoryObject(const std::string& classIdentifier);
      virtual ~InterpolationFactoryObject() = default;
  
      virtual std::unique_ptr<Interpolation> create() const = 0;
      const std::string& getClassIdentifier() const;
  
  protected:
      const std::string classIdentifier_;
  };
  
  /*
   * Base for Keyframe-based interpolations.
   * Required for InterpolationFactory::getSupportedInterpolations to find interpolations for a
   * specific Keyframe type.
   */
  template <typename Keyframe>
  class InterpolationFactoryObjectKeyframe : public InterpolationFactoryObject {
  public:
      InterpolationFactoryObjectKeyframe(const std::string& classIdentifier)
          : InterpolationFactoryObject(classIdentifier) {}
      virtual ~InterpolationFactoryObjectKeyframe() = default;
  };
  
  /*
   * Factory object for InterpolationTyped interpolations
   */
  template <typename InterpTyped>
  class InterpolationFactoryObjectTemplate
      : public InterpolationFactoryObjectKeyframe<typename InterpTyped::key_type> {
  public:
      using key_type = typename InterpTyped::key_type;
      using result_type = typename InterpTyped::result_type;
      // Requiers a static classIdentifier() method on InterpolationType
      InterpolationFactoryObjectTemplate()
          : InterpolationFactoryObjectKeyframe<key_type>(InterpTyped::classIdentifier()) {}
  
      InterpolationFactoryObjectTemplate(const std::string& classIdentifier)
          : InterpolationFactoryObjectKeyframe<key_type>(classIdentifier){};
  
      virtual ~InterpolationFactoryObjectTemplate() = default;
  
      virtual std::unique_ptr<Interpolation> create() const override {
          return std::make_unique<InterpTyped>();
      }
  };
  
  }  // namespace animation
  
  }  // namespace inviwo
  