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/*=========================================================================
*
* Copyright NumFOCUS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#ifndef itkFunctionBase_h
#define itkFunctionBase_h
#include "itkObject.h"
#include "itkObjectFactory.h"
namespace itk
{
/**
* \class FunctionBase
* \brief Base class for all ITK function objects
*
* FunctionBase is the base class for ITK function objects. Specifically,
* the abstract method Evaluate() maps a point from the input space to a point
* in the output space.
*
* Subclasses must override Evaluate().
*
* This class is template over the input (domain) type and
* the output (range) type.
*
* \ingroup Functions
*
* \ingroup ITKCommon
*/
template <typename TInput, typename TOutput>
class ITK_TEMPLATE_EXPORT FunctionBase : public Object
{
public:
ITK_DISALLOW_COPY_AND_MOVE(FunctionBase);
/** Standard class type aliases. */
using Self = FunctionBase;
using Superclass = Object;
using Pointer = SmartPointer<Self>;
using ConstPointer = SmartPointer<const Self>;
/** \see LightObject::GetNameOfClass() */
itkOverrideGetNameOfClassMacro(FunctionBase);
/** Input type */
using InputType = TInput;
/** Output type */
using OutputType = TOutput;
/** Evaluate at the specified input position */
virtual OutputType
Evaluate(const InputType & input) const = 0;
protected:
FunctionBase() = default;
~FunctionBase() override = default;
};
} // end namespace itk
#endif
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