1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
|
/*
* 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_modcpp_hpp
#define tuscany_modcpp_hpp
/**
* Evaluation functions used by mod-eval to evaluate C++
* component implementations.
*/
#include "string.hpp"
#include "stream.hpp"
#include "function.hpp"
#include "list.hpp"
#include "element.hpp"
#include "value.hpp"
#include "monad.hpp"
#include "dynlib.hpp"
#include "../scheme/driver.hpp"
namespace tuscany {
namespace server {
namespace modcpp {
/**
* Apply a C++ component implementation function.
*/
const list<value> failableResult(const value& func, const list<value>& v) {
if (isNull(cdr(v)))
return v;
// Report a failure with an empty reason as 'function not supported'
// Except for the start, and stop functions, which are optional
const value reason = cadr(v);
if (length(reason) == 0) {
if (func == "start" || func == "stop")
return mklist<value>(lvvlambda());
return mklist<value>(nilValue, string("Function not supported: ") + (string)func);
}
return v;
}
/**
* Evaluate a C++ component implementation and convert it to
* an applicable lambda function.
*/
const failable<lvvlambda > evalImplementation(const string& path, const value& impl, const list<value>& px) {
// Configure the implementation's lambda function
const value ipath(attributeValue("path", impl));
const value iname(attributeValue("library", impl));
const string fpath(isNull(ipath)? path + (string)iname : path + (string)ipath + "/" + (string)iname);
const lib ilib(*(new (gc_new<lib>()) lib(fpath + dynlibExt)));
const failable<lvvlambda > fappl(dynlambda<const value(const list<value>&)>("apply", ilib));
if (!hasContent(fappl))
return fappl;
const lvvlambda appl = content(fappl);
const lvvlambda applyImplementation = [ilib, appl, px](const list<value>& params) -> const value {
debug(params, "modeval::cpp::applyImplementation::params");
// Apply the component implementation function
const value val = failableResult(car(params), appl(append(params, px)));
debug(val, "modeval::cpp::applyImplementation::result");
return val;
};
return applyImplementation;
}
}
}
}
#endif /* tuscany_modcpp_hpp */
|
