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/*=========================================================================
*
* Copyright Insight Software Consortium
*
* 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
*
* http://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 sitkMemberFunctionFactory_hxx
#define sitkMemberFunctionFactory_hxx
#include <cassert>
#include "sitkMemberFunctionFactory.h"
#include "sitkDetail.h"
#include "sitkPixelIDTokens.h"
#include "sitkEnableIf.h"
#include "sitkExceptionObject.h"
namespace itk
{
namespace simple
{
// this namespace is internal classes not part of the external simple ITK interface
namespace detail {
// a privately declared predicate for use with the typelist::ForEach
// algorithm
//
// This predicate calls the provided AddressorType on
// each valid ImageType defined from the pixel type id, and the
// provided dimension
template < typename TMemberFunctionFactory, unsigned int VImageDimension, typename TAddressor >
struct MemberFunctionInstantiater
{
MemberFunctionInstantiater( TMemberFunctionFactory &factory )
: m_Factory( factory )
{}
template <class TPixelIDType>
typename EnableIf< IsInstantiated<TPixelIDType, VImageDimension >::Value >::Type
operator()( TPixelIDType*id=NULL ) const
{
Unused( id );
typedef typename PixelIDToImageType<TPixelIDType, VImageDimension>::ImageType ImageType;
typedef TAddressor AddressorType;
AddressorType addressor;
m_Factory.Register(addressor.CLANG_TEMPLATE operator()<ImageType>(), (ImageType*)(NULL));
}
// this methods is conditionally enabled when the PixelID is not instantiated
template <class TPixelIDType>
typename DisableIf< IsInstantiated<TPixelIDType, VImageDimension>::Value >::Type
operator()( TPixelIDType*id=NULL ) const
{
Unused( id );
}
private:
TMemberFunctionFactory &m_Factory;
};
template <typename TMemberFunctionPointer>
MemberFunctionFactory<TMemberFunctionPointer>
::MemberFunctionFactory( typename MemberFunctionFactory::ObjectType *pObject )
: m_ObjectPointer( pObject )
{
assert( pObject );
}
template <typename TMemberFunctionPointer>
template<typename TImageType >
void MemberFunctionFactory<TMemberFunctionPointer>
::Register( typename MemberFunctionFactory::MemberFunctionType pfunc, TImageType* )
{
PixelIDValueType pixelID = ImageTypeToPixelIDValue<TImageType>::Result;
// this shouldn't occour, just may be useful for debugging
assert( pixelID >= 0 && pixelID < typelist::Length< InstantiatedPixelIDTypeList >::Result );
sitkStaticAssert( IsInstantiated<TImageType>::Value,
"UnInstantiated ImageType or dimension");
if ( pixelID >= 0 && pixelID < typelist::Length< InstantiatedPixelIDTypeList >::Result )
{
switch( int(TImageType::ImageDimension) )
{
case 4:
Superclass::m_PFunction4[ pixelID ] = Superclass::BindObject( pfunc, m_ObjectPointer );
break;
case 3:
Superclass::m_PFunction3[ pixelID ] = Superclass::BindObject( pfunc, m_ObjectPointer );
break;
case 2:
Superclass::m_PFunction2[ pixelID ] = Superclass::BindObject( pfunc, m_ObjectPointer );
break;
default:
break;
}
}
}
template <typename TMemberFunctionPointer>
template <typename TPixelIDTypeList,
unsigned int VImageDimension,
typename TAddressor>
void MemberFunctionFactory<TMemberFunctionPointer>
::RegisterMemberFunctions( void )
{
typedef MemberFunctionInstantiater< MemberFunctionFactory, VImageDimension,TAddressor > InstantiaterType;
// visit each type in the list, and register if instantiated
typelist::Visit<TPixelIDTypeList> visitEachType;
visitEachType( InstantiaterType( *this ) );
}
template <typename TMemberFunctionPointer>
bool
MemberFunctionFactory< TMemberFunctionPointer >
::HasMemberFunction( PixelIDValueType pixelID, unsigned int imageDimension ) const throw()
{
try
{
switch ( imageDimension )
{
case 4:
// check if tr1::function has been set in map
return Superclass::m_PFunction4.find( pixelID ) != Superclass::m_PFunction4.end();
case 3:
// check if tr1::function has been set in map
return Superclass::m_PFunction3.find( pixelID ) != Superclass::m_PFunction3.end();
case 2:
// check if tr1::function has been set in map
return Superclass::m_PFunction2.find( pixelID ) != Superclass::m_PFunction2.end();
default:
return false;
}
}
// we do not throw exceptions
catch(...)
{
return false;
}
}
template <typename TMemberFunctionPointer>
typename MemberFunctionFactory<TMemberFunctionPointer>::FunctionObjectType
MemberFunctionFactory<TMemberFunctionPointer>
::GetMemberFunction( PixelIDValueType pixelID, unsigned int imageDimension )
{
if ( pixelID >= typelist::Length< InstantiatedPixelIDTypeList >::Result || pixelID < 0 )
{
sitkExceptionMacro ( << "unexpected error pixelID is out of range " << pixelID << " " << typeid(ObjectType).name() );
}
switch ( imageDimension )
{
case 4:
// check if tr1::function has been set
if ( Superclass::m_PFunction4.find( pixelID ) != Superclass::m_PFunction4.end() )
{
return Superclass::m_PFunction4[ pixelID ];
}
sitkExceptionMacro ( << "Pixel type: "
<< GetPixelIDValueAsString(pixelID)
<< " is not supported in 4D by "
<< typeid(ObjectType).name()
<< " or SimpleITK compiled with SimpleITK_4D_IMAGES set to OFF." );
case 3:
// check if tr1::function has been set
if ( Superclass::m_PFunction3.find( pixelID ) != Superclass::m_PFunction3.end() )
{
return Superclass::m_PFunction3[ pixelID ];
}
sitkExceptionMacro ( << "Pixel type: "
<< GetPixelIDValueAsString(pixelID)
<< " is not supported in 3D by"
<< typeid(ObjectType).name() );
break;
case 2:
// check if tr1::function has been set
if ( Superclass::m_PFunction2.find( pixelID ) != Superclass::m_PFunction2.end() )
{
return Superclass::m_PFunction2[ pixelID ];
}
sitkExceptionMacro ( << "Pixel type: "
<< GetPixelIDValueAsString(pixelID)
<< " is not supported in 2D by"
<< typeid(ObjectType).name() );
break;
default:
sitkExceptionMacro ( << "Image dimension " << imageDimension << " is not supported" );
throw;
}
}
} // end namespace detail
} // end namespace simple
} // end namespace itk
#endif // sitkMemberFunctionFactory_h
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