1: <?php
 2: 
 3: /**
 4:  *
 5:  * A factory for creating cache provider implementations that implement the
 6:  * AlphaCacheProviderInterface interface.
 7:  *
 8:  * @package alpha::util::cache
 9:  * @since 1.1
10:  * @author John Collins <dev@alphaframework.org>
11:  * @version $Id: AlphaCacheProviderFactory.inc 1701 2013-12-18 22:33:25Z alphadevx $
12:  * @license http://www.opensource.org/licenses/bsd-license.php The BSD License
13:  * @copyright Copyright (c) 2013, John Collins (founder of Alpha Framework).
14:  * All rights reserved.
15:  *
16:  * <pre>
17:  * Redistribution and use in source and binary forms, with or
18:  * without modification, are permitted provided that the
19:  * following conditions are met:
20:  *
21:  * * Redistributions of source code must retain the above
22:  *   copyright notice, this list of conditions and the
23:  *   following disclaimer.
24:  * * Redistributions in binary form must reproduce the above
25:  *   copyright notice, this list of conditions and the
26:  *   following disclaimer in the documentation and/or other
27:  *   materials provided with the distribution.
28:  * * Neither the name of the Alpha Framework nor the names
29:  *   of its contributors may be used to endorse or promote
30:  *   products derived from this software without specific
31:  *   prior written permission.
32:  *
33:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
34:  * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
35:  * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
36:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
37:  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
38:  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
39:  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
40:  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
41:  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
42:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
43:  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
44:  * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
45:  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
46:  * </pre>
47:  *
48:  */
49: class AlphaCacheProviderFactory {
50:     /**
51:      * Trace logger
52:      *
53:      * @var Logger
54:      * @since 1.1
55:      */
56:     private static $logger = null;
57: 
58:     /**
59:      * A static method that attempts to return a AlphaCacheProviderInterface instance
60:      * based on the name of the provider class supplied.
61:      *
62:      * @param $providerName The class name of the provider class, should be in the alpha::util::cache package.
63:      * @throws IllegalArguementException
64:      * @return AlphaCacheProviderInterface
65:      * @since 1.1
66:      */
67:     public static function getInstance($providerName) {
68:         if(self::$logger == null)
69:             self::$logger = new Logger('AlphaCacheProviderFactory');
70: 
71:         self::$logger->debug('>>getInstance(providerName=['.$providerName.'])');
72: 
73:         global $config;
74: 
75:         if(file_exists($config->get('app.root').'alpha/util/cache/'.$providerName.'.inc')) {
76:             require_once $config->get('app.root').'alpha/util/cache/'.$providerName.'.inc';
77: 
78:             $instance = new $providerName;
79: 
80:             if(!$instance instanceof AlphaCacheProviderInterface)
81:                 throw new IllegalArguementException('The class ['.$providerName.'] does not implement the expected AlphaCacheProviderInterface intwerface!');
82: 
83:             self::$logger->debug('<<getInstance: [Object '.$providerName.']');
84:             return $instance;
85:         }else{
86:             throw new IllegalArguementException('The class ['.$providerName.'] is not defined anywhere!');
87:         }
88: 
89:         self::$logger->debug('<<getInstance');
90:     }
91: }
92: 
93: ?>