CallMethod.h

Go to the documentation of this file.

// Mantid Repository : https://github.com/mantidproject/mantid
//
// Copyright © 2012 ISIS Rutherford Appleton Laboratory UKRI,
//   NScD Oak Ridge National Laboratory, European Spallation Source,
//   Institut Laue - Langevin & CSNS, Institute of High Energy Physics, CAS
// SPDX - License - Identifier: GPL - 3.0 +
#pragma once
 
#include "MantidPythonInterface/core/ErrorHandling.h"
#include "MantidPythonInterface/core/GlobalInterpreterLock.h"
#include "MantidPythonInterface/core/WrapperHelpers.h"
 
#include <boost/python/call_method.hpp>
#include <boost/python/class.hpp>
 
namespace Mantid {
namespace PythonInterface {
 
struct UndefinedAttributeError {
  virtual ~UndefinedAttributeError() = default;
};
 
namespace detail {
template <typename ReturnType, typename... Args>
ReturnType callMethodImpl(PyObject *obj, const char *methodName, const Args &...args) {
  try {
    return boost::python::call_method<ReturnType, Args...>(obj, methodName, args...);
  } catch (boost::python::error_already_set &) {
    throw PythonException();
  }
}
} // namespace detail
 
template <typename ReturnType, typename... Args>
ReturnType callMethodNoCheck(PyObject *obj, const char *methodName, const Args &...args) {
  GlobalInterpreterLock gil;
  return detail::callMethodImpl<ReturnType, Args...>(obj, methodName, args...);
}
 
template <typename ReturnType, typename... Args>
ReturnType callMethodNoCheck(const boost::python::object &obj, const char *methodName, const Args &...args) {
  GlobalInterpreterLock gil;
  return detail::callMethodImpl<ReturnType, Args...>(obj.ptr(), methodName, args...);
}
 
template <typename ReturnType, typename... Args>
ReturnType callMethod(PyObject *obj, const char *methodName, const Args &...args) {
  GlobalInterpreterLock gil;
  if (typeHasAttribute(obj, methodName)) {
    return detail::callMethodImpl<ReturnType, Args...>(obj, methodName, args...);
  } else {
    throw UndefinedAttributeError();
  }
}
} // namespace PythonInterface
} // namespace Mantid