1: | <?php |
2: | /** |
3: | ##DOC-SIGNATURE## |
4: | |
5: | This file is part of WideImage. |
6: | |
7: | WideImage is free software; you can redistribute it and/or modify |
8: | it under the terms of the GNU Lesser General Public License as published by |
9: | the Free Software Foundation; either version 2.1 of the License, or |
10: | (at your option) any later version. |
11: | |
12: | WideImage is distributed in the hope that it will be useful, |
13: | but WITHOUT ANY WARRANTY; without even the implied warranty of |
14: | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
15: | GNU Lesser General Public License for more details. |
16: | |
17: | You should have received a copy of the GNU Lesser General Public License |
18: | along with WideImage; if not, write to the Free Software |
19: | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
20: | |
21: | * @package Internals |
22: | **/ |
23: | |
24: | namespace WideImage; |
25: | |
26: | use WideImage\Operation; |
27: | use WideImage\Exception\UnknownImageOperationException; |
28: | |
29: | /** |
30: | * Operation factory |
31: | * |
32: | * @package Internals |
33: | **/ |
34: | class OperationFactory |
35: | { |
36: | protected static $cache = array(); |
37: | |
38: | public static function get($operationName) |
39: | { |
40: | $lcname = strtolower($operationName); |
41: | |
42: | if (!isset(self::$cache[$lcname])) { |
43: | $opClassName = "\\WideImage\\Operation\\" . ucfirst($operationName); |
44: | |
45: | // why not use autoloading? |
46: | // if (!class_exists($opClassName, false)) { |
47: | if (!class_exists($opClassName)) { |
48: | throw new UnknownImageOperationException("Can't load '{$operationName}' operation."); |
49: | } |
50: | |
51: | self::$cache[$lcname] = new $opClassName(); |
52: | } |
53: | |
54: | return self::$cache[$lcname]; |
55: | } |
56: | } |
57: |