lsst.daf.persistence g17e5ecfddb+2f99ec5bff
readProxy.h
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1// -*- lsst-c++ -*-
2
3/*
4 * LSST Data Management System
5 * Copyright 2008, 2009, 2010 LSST Corporation.
6 *
7 * This product includes software developed by the
8 * LSST Project (http://www.lsst.org/).
9 *
10 * This program is free software: you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation, either version 3 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the LSST License Statement and
21 * the GNU General Public License along with this program. If not,
22 * see <http://www.lsstcorp.org/LegalNotices/>.
23 */
24
25#ifndef LSST_DAF_PERSISTENCE_PYTHON_READPROXY_H
26#define LSST_DAF_PERSISTENCE_PYTHON_READPROXY_H
27
28#include "pybind11/pybind11.h"
29
30namespace lsst {
31namespace daf {
32namespace persistence {
33namespace python {
34
44public:
45 pybind11::object subject;
46};
47
56template <typename OutputType> void register_proxy() {
57 namespace py = pybind11;
58 auto implicit_caster = [](PyObject *obj, PyTypeObject *type) -> PyObject * {
59 if (!py::detail::make_caster<lsst::daf::persistence::python::ReadProxyBase>().load(obj, false)) {
60 return nullptr;
61 }
62 PyObject *result = PyObject_GetAttrString(obj, "__subject__");
63 if (result == nullptr) {
64 PyErr_Clear(); // needed to fall through to next conversion
65 }
66 return result;
67 };
68
69 if (auto tinfo = py::detail::get_type_info(typeid(OutputType))) {
70 tinfo->implicit_conversions.push_back(implicit_caster);
71 } else {
72 py::pybind11_fail("register_proxy: Unable to find type " + py::type_id<OutputType>());
73 }
74}
75
76}}}}
77
78#endif
Base class for lazy-loading proxy.
Definition: readProxy.h:43
void register_proxy()
Register a type for (optional) lazy load.
Definition: readProxy.h:56