| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you 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 |
| * |
| * 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. |
| */ |
| |
| /* $Rev$ $Date$ */ |
| |
| #ifndef tuscany_modpython_hpp |
| #define tuscany_modpython_hpp |
| |
| /** |
| * Evaluation functions used by mod-eval to evaluate Python |
| * component implementations. |
| */ |
| |
| #include "string.hpp" |
| #include "stream.hpp" |
| #include "function.hpp" |
| #include "list.hpp" |
| #include "value.hpp" |
| #include "monad.hpp" |
| #include "eval.hpp" |
| |
| namespace tuscany { |
| namespace server { |
| namespace modpython { |
| |
| /** |
| * Apply a Python component implementation function. |
| */ |
| struct applyImplementation { |
| PyObject* impl; |
| const list<value> px; |
| applyImplementation(PyObject* impl, const list<value>& px) : impl(impl), px(px) { |
| } |
| const value operator()(const list<value>& params) const { |
| const value expr = append<value>(params, px); |
| debug(expr, "modeval::python::applyImplementation::input"); |
| const failable<value> res = python::evalScript(expr, impl); |
| const value val = !hasContent(res)? mklist<value>(value(), reason(res)) : mklist<value>(content(res)); |
| debug(val, "modeval::python::applyImplementation::result"); |
| return val; |
| } |
| }; |
| |
| /** |
| * Evaluate a Python component implementation and convert it to an applicable |
| * lambda function. |
| */ |
| const failable<lambda<value(const list<value>&)> > evalImplementation(const string& path, const value& impl, const list<value>& px) { |
| const string spath(attributeValue("script", impl)); |
| const string fpath(path + spath); |
| ifstream is(fpath); |
| if (fail(is)) |
| return mkfailure<lambda<value(const list<value>&)> >(string("Could not read implementation: ") + fpath); |
| const failable<PyObject*> script = python::readScript(python::moduleName(spath), fpath, is); |
| if (!hasContent(script)) |
| return mkfailure<lambda<value(const list<value>&)> >(reason(script)); |
| return lambda<value(const list<value>&)>(applyImplementation(content(script), px)); |
| } |
| |
| } |
| } |
| } |
| |
| #endif /* tuscany_modpython_hpp */ |