CachedObjectStorageFactory.php

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<?php

class PHPExcel_CachedObjectStorageFactory
{
    const cache_in_memory               = 'Memory';
    const cache_in_memory_gzip          = 'MemoryGZip';
    const cache_in_memory_serialized    = 'MemorySerialized';
    const cache_igbinary                = 'Igbinary';
    const cache_to_discISAM             = 'DiscISAM';
    const cache_to_apc                  = 'APC';
    const cache_to_memcache             = 'Memcache';
    const cache_to_phpTemp              = 'PHPTemp';
    const cache_to_wincache             = 'Wincache';
    const cache_to_sqlite               = 'SQLite';
    const cache_to_sqlite3              = 'SQLite3';


    private static $_cacheStorageMethod = NULL;

    private static $_cacheStorageClass = NULL;


    private static $_storageMethods = array(
        self::cache_in_memory,
        self::cache_in_memory_gzip,
        self::cache_in_memory_serialized,
        self::cache_igbinary,
        self::cache_to_phpTemp,
        self::cache_to_discISAM,
        self::cache_to_apc,
        self::cache_to_memcache,
        self::cache_to_wincache,
        self::cache_to_sqlite,
        self::cache_to_sqlite3,
    );


    private static $_storageMethodDefaultParameters = array(
        self::cache_in_memory               => array(
                                                    ),
        self::cache_in_memory_gzip          => array(
                                                    ),
        self::cache_in_memory_serialized    => array(
                                                    ),
        self::cache_igbinary                => array(
                                                    ),
        self::cache_to_phpTemp              => array( 'memoryCacheSize' => '1MB'
                                                    ),
        self::cache_to_discISAM             => array( 'dir'             => NULL
                                                    ),
        self::cache_to_apc                  => array( 'cacheTime'       => 600
                                                    ),
        self::cache_to_memcache             => array( 'memcacheServer'  => 'localhost',
                                                      'memcachePort'    => 11211,
                                                      'cacheTime'       => 600
                                                    ),
        self::cache_to_wincache             => array( 'cacheTime'       => 600
                                                    ),
        self::cache_to_sqlite               => array(
                                                    ),
        self::cache_to_sqlite3              => array(
                                                    ),
    );


    private static $_storageMethodParameters = array();


    public static function getCacheStorageMethod()
    {
        return self::$_cacheStorageMethod;
    }   //    function getCacheStorageMethod()


    public static function getCacheStorageClass()
    {
        return self::$_cacheStorageClass;
    }   //    function getCacheStorageClass()


    public static function getAllCacheStorageMethods()
    {
        return self::$_storageMethods;
    }   //    function getCacheStorageMethods()


    public static function getCacheStorageMethods()
    {
        $activeMethods = array();
        foreach(self::$_storageMethods as $storageMethod) {
            $cacheStorageClass = 'PHPExcel_CachedObjectStorage_' . $storageMethod;
            if (call_user_func(array($cacheStorageClass, 'cacheMethodIsAvailable'))) {
                $activeMethods[] = $storageMethod;
            }
        }
        return $activeMethods;
    }   //    function getCacheStorageMethods()


    public static function initialize($method = self::cache_in_memory, $arguments = array())
    {
        if (!in_array($method,self::$_storageMethods)) {
            return FALSE;
        }

        $cacheStorageClass = 'PHPExcel_CachedObjectStorage_'.$method;
        if (!call_user_func(array( $cacheStorageClass,
                                   'cacheMethodIsAvailable'))) {
            return FALSE;
        }

        self::$_storageMethodParameters[$method] = self::$_storageMethodDefaultParameters[$method];
        foreach($arguments as $k => $v) {
            if (array_key_exists($k, self::$_storageMethodParameters[$method])) {
                self::$_storageMethodParameters[$method][$k] = $v;
            }
        }

        if (self::$_cacheStorageMethod === NULL) {
            self::$_cacheStorageClass = 'PHPExcel_CachedObjectStorage_' . $method;
            self::$_cacheStorageMethod = $method;
        }
        return TRUE;
    }   //    function initialize()


    public static function getInstance(PHPExcel_Worksheet $parent)
    {
        $cacheMethodIsAvailable = TRUE;
        if (self::$_cacheStorageMethod === NULL) {
            $cacheMethodIsAvailable = self::initialize();
        }

        if ($cacheMethodIsAvailable) {
            $instance = new self::$_cacheStorageClass( $parent,
                                                       self::$_storageMethodParameters[self::$_cacheStorageMethod]
                                                     );
            if ($instance !== NULL) {
                return $instance;
            }
        }

        return FALSE;
    }   //    function getInstance()


        public static function finalize()
        {
                self::$_cacheStorageMethod = NULL;
                self::$_cacheStorageClass = NULL;
                self::$_storageMethodParameters = array();
        }

}