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
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
|
// file : odb/mssql/no-id-object-result.txx
// copyright : Copyright (c) 2009-2019 Code Synthesis Tools CC
// license : ODB NCUEL; see accompanying LICENSE file
#include <odb/callback.hxx>
#include <odb/exceptions.hxx> // result_not_cached
#include <odb/mssql/exceptions.hxx> // long_data_reload
#include <odb/mssql/no-id-object-statements.hxx>
namespace odb
{
namespace mssql
{
template <typename T>
no_id_object_result_impl<T>::
~no_id_object_result_impl ()
{
invalidate ();
}
template <typename T>
void no_id_object_result_impl<T>::
invalidate ()
{
change_callback_type& cc (statements_.image ().change_callback_);
if (cc.context == this)
{
cc.callback = 0;
cc.context = 0;
}
delete image_copy_;
image_copy_ = 0;
if (!this->end_)
{
statement_->free_result ();
this->end_ = true;
}
statement_.reset ();
}
template <typename T>
no_id_object_result_impl<T>::
no_id_object_result_impl (const query_base&,
details::shared_ptr<select_statement> statement,
statements_type& statements,
const schema_version_migration* svm)
: base_type (statements.connection ()),
statement_ (statement),
statements_ (statements),
tc_ (svm),
use_copy_ (false),
image_copy_ (0)
{
}
template <typename T>
void no_id_object_result_impl<T>::
load (object_type& obj)
{
if (!can_load_)
throw long_data_reload ();
object_traits::callback (this->db_, obj, callback_event::pre_load);
tc_.init (obj,
use_copy_ ? *image_copy_ : statements_.image (),
&this->db_);
// If we are using a copy, make sure the callback information for
// long data also comes from the copy.
//
can_load_ = !statement_->stream_result (
use_copy_ ? &statements_.image () : 0,
use_copy_ ? image_copy_ : 0);
object_traits::callback (this->db_, obj, callback_event::post_load);
}
template <typename T>
void no_id_object_result_impl<T>::
next ()
{
can_load_ = true;
this->current (pointer_type ());
typename object_traits::image_type& im (statements_.image ());
change_callback_type& cc (im.change_callback_);
if (cc.context == this)
{
cc.callback = 0;
cc.context = 0;
}
use_copy_ = false;
if (im.version != statements_.select_image_version ())
{
binding& b (statements_.select_image_binding ());
tc_.bind (b.bind, im, statement_select);
statements_.select_image_version (im.version);
b.version++;
}
if (statement_->fetch () == select_statement::no_data)
{
statement_->free_result ();
this->end_ = true;
}
else
{
cc.callback = &change_callback;
cc.context = this;
}
}
template <typename T>
void no_id_object_result_impl<T>::
cache ()
{
}
template <typename T>
std::size_t no_id_object_result_impl<T>::
size ()
{
throw result_not_cached ();
}
template <typename T>
void no_id_object_result_impl<T>::
change_callback (void* c)
{
no_id_object_result_impl<T>* r (
static_cast<no_id_object_result_impl<T>*> (c));
typename object_traits::image_type im (r->statements_.image ());
if (r->image_copy_ == 0)
r->image_copy_ = new typename object_traits::image_type (im);
else
*r->image_copy_ = im;
im.change_callback_.callback = 0;
im.change_callback_.context = 0;
r->use_copy_ = true;
}
}
}
|
