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
110
111
112
113
|
#ifndef QPID_FRAMING_AMQHEADERBODY_H
#define QPID_FRAMING_AMQHEADERBODY_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 "qpid/framing/amqp_types.h"
#include "qpid/framing/AMQBody.h"
#include "qpid/framing/Buffer.h"
#include "qpid/framing/DeliveryProperties.h"
#include "qpid/framing/MessageProperties.h"
#include "qpid/CommonImportExport.h"
#include <iostream>
#include <boost/optional.hpp>
namespace qpid {
namespace framing {
class QPID_COMMON_CLASS_EXTERN AMQHeaderBody : public AMQBody
{
template <class T> struct OptProps { boost::optional<T> props; };
template <class Base, class T>
struct PropSet : public Base, public OptProps<T> {
uint32_t encodedSize() const {
const boost::optional<T>& p=this->OptProps<T>::props;
return (p ? p->encodedSize() : 0) + Base::encodedSize();
}
void encode(Buffer& buffer) const {
const boost::optional<T>& p=this->OptProps<T>::props;
if (p) p->encode(buffer);
Base::encode(buffer);
}
bool decode(Buffer& buffer, uint32_t size, uint16_t type) {
boost::optional<T>& p=this->OptProps<T>::props;
if (type == T::TYPE) {
p=T();
p->decodeStructBody(buffer, size);
return true;
}
else
return Base::decode(buffer, size, type);
}
void print(std::ostream& out) const {
const boost::optional<T>& p=this->OptProps<T>::props;
if (p) out << *p;
Base::print(out);
}
};
struct Empty {
uint32_t encodedSize() const { return 0; }
void encode(Buffer&) const {};
bool decode(Buffer&, uint32_t, uint16_t) const { return false; };
void print(std::ostream&) const {}
};
// Could use boost::mpl::fold to construct a larger set.
typedef PropSet<PropSet<Empty, DeliveryProperties>, MessageProperties> Properties;
Properties properties;
public:
inline uint8_t type() const { return HEADER_BODY; }
QPID_COMMON_EXTERN uint32_t encodedSize() const;
QPID_COMMON_EXTERN void encode(Buffer& buffer) const;
QPID_COMMON_EXTERN void decode(Buffer& buffer, uint32_t size);
QPID_COMMON_EXTERN uint64_t getContentLength() const;
QPID_COMMON_EXTERN void print(std::ostream& out) const;
QPID_COMMON_EXTERN void accept(AMQBodyConstVisitor&) const;
template <class T> T* get(bool create) {
boost::optional<T>& p=properties.OptProps<T>::props;
if (create && !p) p=T();
return p.get_ptr();
}
template <class T> const T* get() const {
return properties.OptProps<T>::props.get_ptr();
}
template <class T> void erase() {
properties.OptProps<T>::props.reset();
}
boost::intrusive_ptr<AMQBody> clone() const { return BodyFactory::copy(*this); }
};
}}
#endif /*!QPID_FRAMING_AMQHEADERBODY_H*/
|
