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/*
* 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 implementation.python
* component implementations.
*/
#include "string.hpp"
#include "stream.hpp"
#include "function.hpp"
#include "list.hpp"
#include "value.hpp"
#include "debug.hpp"
#include "monad.hpp"
#include "../python/eval.hpp"
#include "../http/httpd.hpp"
namespace tuscany {
namespace server {
namespace modpython {
/**
* Evaluate a script component implementation function.
*/
struct evalImplementation {
PyObject* impl;
const list<value> px;
evalImplementation(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::evalImplementation::input");
gc_pool pool(gc_current_pool());
const failable<value> val = python::evalScript(expr, impl, pool);
debug(val, "modeval::python::evalImplementation::result");
if (!hasContent(val))
return mklist<value>(value(), reason(val));
return mklist<value>(content(val));
}
};
/**
* Read a script component implementation.
*/
const failable<lambda<value(const list<value>&)> > readImplementation(const string& path, const list<value>& px) {
ifstream is(path);
if (fail(is))
return mkfailure<lambda<value(const list<value>&)> >(string("Could not read implementation: ") + path);
const failable<PyObject*> impl = python::readScript(path, is);
if (!hasContent(impl))
return mkfailure<lambda<value(const list<value>&)> >(reason(impl));
return lambda<value(const list<value>&)>(evalImplementation(content(impl), px));
}
}
}
}
#endif /* tuscany_modpython_hpp */
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