|
942.1.12
by Monty Taylor
Converted udf_func into a factory. |
1 |
/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
|
2 |
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
|
|
3 |
*
|
|
4 |
* Copyright (C) 2008 Sun Microsystems
|
|
5 |
*
|
|
6 |
* This program is free software; you can redistribute it and/or modify
|
|
7 |
* it under the terms of the GNU General Public License as published by
|
|
8 |
* the Free Software Foundation; version 2 of the License.
|
|
9 |
*
|
|
10 |
* This program is distributed in the hope that it will be useful,
|
|
11 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
12 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
13 |
* GNU General Public License for more details.
|
|
14 |
*
|
|
15 |
* You should have received a copy of the GNU General Public License
|
|
16 |
* along with this program; if not, write to the Free Software
|
|
17 |
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
18 |
*/
|
|
19 |
||
20 |
#ifndef DRIZZLED_FUNCTION_CREATE_H
|
|
21 |
#define DRIZZLED_FUNCTION_CREATE_H
|
|
22 |
||
23 |
||
24 |
#include <drizzled/item.h> |
|
25 |
#include <drizzled/sql_list.h> |
|
26 |
#include <drizzled/item/bin_string.h> |
|
27 |
||
28 |
#include <string> |
|
|
971.1.23
by Monty Taylor
Add generalized registry to be used for case-insensitive mappings. |
29 |
#include <vector> |
|
942.1.12
by Monty Taylor
Converted udf_func into a factory. |
30 |
#include <functional> |
31 |
||
32 |
class Function_builder |
|
33 |
: public std::unary_function<MEM_ROOT*, Item_func *> |
|
34 |
{
|
|
35 |
std::string name; |
|
|
971.1.23
by Monty Taylor
Add generalized registry to be used for case-insensitive mappings. |
36 |
std::vector<std::string> aliases; |
|
942.1.12
by Monty Taylor
Converted udf_func into a factory. |
37 |
public: |
38 |
Function_builder(std::string in_name) : name(in_name) {} |
|
39 |
virtual result_type operator()(argument_type session) const= 0; |
|
40 |
virtual ~Function_builder() {} |
|
41 |
||
|
971.1.23
by Monty Taylor
Add generalized registry to be used for case-insensitive mappings. |
42 |
std::string getName() const |
43 |
{
|
|
44 |
return name; |
|
45 |
}
|
|
46 |
||
47 |
const std::vector<std::string>& getAliases() const |
|
48 |
{
|
|
49 |
return aliases; |
|
50 |
}
|
|
51 |
||
52 |
void addAlias(std::string alias) |
|
53 |
{
|
|
54 |
aliases.push_back(alias); |
|
|
942.1.12
by Monty Taylor
Converted udf_func into a factory. |
55 |
}
|
56 |
};
|
|
57 |
||
58 |
template<class T> |
|
59 |
class Create_function : public Function_builder |
|
60 |
{
|
|
61 |
public: |
|
62 |
typedef T Function_class; |
|
63 |
Create_function(std::string in_name): Function_builder(in_name) {} |
|
|
971.1.24
by Monty Taylor
Fixed a bug in the original impl. |
64 |
Create_function(const char *in_name): Function_builder(in_name) {} |
|
942.1.12
by Monty Taylor
Converted udf_func into a factory. |
65 |
virtual result_type operator()(argument_type root) const |
66 |
{
|
|
67 |
return new (root) Function_class(); |
|
68 |
}
|
|
69 |
};
|
|
70 |
||
71 |
||
72 |
||
73 |
#endif /* DRIZZLED_FUNCTION_CREATE_H */ |