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
|
/*
* Copyright (c) 2011-2014, Intel Corporation
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification,
* are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation and/or
* other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors
* may be used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "ElementLibrary.h"
#include "ElementBuilder.h"
#include <map>
#include <string>
/** Factory that creates an element given an xml element. If no matching builder is found, it uses
* the default builder.
*
* @tparam CDefaultElementBuilder is the class of the element builder to use if no corresponding
* builder is found for a given xml element.
*/
template<class CDefaultElementBuilder>
class CDefaultElementLibrary: public CElementLibrary
{
public:
explicit CDefaultElementLibrary(bool bEnableDefaultMechanism = true);
virtual ~CDefaultElementLibrary() {}
/** Enable the default builder fallback mechanism.
* @see createElement() for more detail on this mechanism.
*
* @param[in] bEnable if true/false, activate/deactivate the default builder mechanism.
*/
void enableDefaultMechanism(bool bEnable) {
_bEnableDefaultMechanism = bEnable;
}
/** Create and return an element instanciated depending on an xmlElement.
*
* @param[in] xmlElement: The xml element used to find a matching builder
*
* @return If a matching builder is found, return an element created from the builder,
* otherwise:
* If the default mechanism is enable (@see enableDefaultMechanism),
* create the elemen with the default element builder.
* otherwise, return NULL.
*/
CElement* createElement(const CXmlElement& xmlElement) const;
private:
bool _bEnableDefaultMechanism;
CDefaultElementBuilder _DefaultElementBuilder;
};
template<class CDefaultElementBuilder>
CDefaultElementLibrary<CDefaultElementBuilder>::CDefaultElementLibrary(bool bEnableDefaultMechanism) :
_bEnableDefaultMechanism(bEnableDefaultMechanism),
_DefaultElementBuilder() {}
template<class CDefaultElementBuilder>
CElement* CDefaultElementLibrary<CDefaultElementBuilder>::createElement(const CXmlElement& xmlElement) const
{
CElement* builtElement = CElementLibrary::createElement(xmlElement);
if (builtElement != NULL) {
// The element was created, return it
return builtElement;
}
if (!_bEnableDefaultMechanism) {
// The default builder mechanism is not enabled
return NULL;
}
// Use the default builder
return _DefaultElementBuilder.createElement(xmlElement);
}
|
