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
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
#ifndef QPID_SERIALIZERBASE_H
#define QPID_SERIALIZERBASE_H
/*
*
* 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.
*
*/
#include <boost/cast.hpp>
#include <boost/array.hpp>
#include <boost/utility/enable_if.hpp>
#include <boost/type_traits/is_class.hpp>
namespace qpid {
/**
* Base template for serializers, provides generic serialization for
* conmpound types and common encode/decode/size functions.
*
* Derived template must provide
* - Derived& op()(T) for primitive types.
* - Derived& raw(void*, size_t) for raw binary data
* - Derived& byte(char) for single bytes.
*
* Derived templatse may override any of the functions provided by
* this base class.
*
* This class provides templates to break down compound types
* into primitive types and delegate to the derived class.
*
*/
template <class Derived> class Serializer {
public:
/** Call T::serialize() for classes that have their own serialize function */
template <class T>
typename boost::enable_if<boost::is_class<T>, Derived>::type
operator()(T& t) { t.serialize(self()); return self(); }
template <class T, size_t N>
Derived& operator()(boost::array<T,N>& a) {
std::for_each(a.begin(), a.end(), self());
return self();
}
Derived& operator()(char& x) { return self().byte((char&)x); }
Derived& operator()(int8_t& x) { return self().byte((char&)x); }
Derived& operator()(uint8_t& x) { return self().byte((char&)x); }
protected:
template <class T> Derived& raw(T& t) {
return self().raw(&t, sizeof(T));
}
private:
Derived& self() { return *static_cast<Derived*>(this); }
};
/** Like Serializer but does not modify the values passed to it. */
template <class Derived> class ConstSerializer {
public:
template <class T>
typename boost::enable_if<boost::is_class<T>, Derived>::type
operator()(const T& t) {
// Const cast so we don't have to write 2 serialize() functions
// for every class.
const_cast<T&>(t).serialize(self());
return self();
}
template <class T, size_t N>
Derived& operator()(const boost::array<T,N>& a) {
std::for_each(a.begin(), a.end(), self());
return self();
}
Derived& operator()(char x) { return self().byte(x); }
Derived& operator()(int8_t x) { return self().byte(x); }
Derived& operator()(uint8_t x) { return self().byte(x); }
protected:
template <class T> Derived& raw(const T& t) {
return self().raw(&t, sizeof(T));
}
private:
Derived& self() { return *static_cast<Derived*>(this); }
};
} // namespace qpid
#endif /*!QPID_SERIALIZERBASE_H*/
|
