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/*=========================================================================
Program: Insight Segmentation & Registration Toolkit
Module: itkPyImageFilter.txx
Language: C++
Date: $Date$
Version: $Revision$
Copyright (c) Insight Software Consortium. All rights reserved.
See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
This software is distributed WITHOUT ANY WARRANTY; without even
the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
PURPOSE. See the above copyright notices for more information.
=========================================================================*/
#include "itkPyImageFilter.h"
namespace itk
{
template <class TInputImage, class TOutputImage>
PyImageFilter<TInputImage,TOutputImage>
::PyImageFilter()
{
this->obj = NULL;
}
template <class TInputImage, class TOutputImage>
PyImageFilter<TInputImage,TOutputImage>
::~PyImageFilter()
{
if (this->obj)
{
Py_DECREF(this->obj);
}
this->obj = NULL;
}
template <class TInputImage, class TOutputImage>
void
PyImageFilter<TInputImage,TOutputImage>
::SetPyGenerateData(PyObject *obj)
{
if (obj != this->obj)
{
if (this->obj)
{
// get rid of our reference
Py_DECREF(this->obj);
}
// store the new object
this->obj = obj;
if (this->obj)
{
// take out reference (so that the calling code doesn't
// have to keep a binding to the callable around)
Py_INCREF(this->obj);
}
}
}
template <class TInputImage, class TOutputImage>
void
PyImageFilter<TInputImage,TOutputImage>
::GenerateData()
{
// make sure that the CommandCallable is in fact callable
if (!PyCallable_Check(this->obj))
{
// we throw a standard ITK exception: this makes it possible for
// our standard CableSwig exception handling logic to take this
// through to the invoking Python process
itkExceptionMacro(<<"CommandCallable is not a callable Python object, "
<<"or it has not been set.");
}
else
{
PyObject *result;
result = PyEval_CallObject(this->obj, (PyObject *)NULL);
if (result)
{
Py_DECREF(result);
}
else
{
// there was a Python error. Clear the error by printing to stdout
PyErr_Print();
// make sure the invoking Python code knows there was a problem
// by raising an exception
itkExceptionMacro(<<"There was an error executing the "
<<"CommandCallable.");
}
}
}
} // namespace itk
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