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<?php
/**
* PHPExcel
*
* Copyright (c) 2006 - 2012 PHPExcel
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* @category PHPExcel
* @package PHPExcel
* @copyright Copyright (c) 2006 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)
* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
* @version 1.7.7, 2012-05-19
*/
/**
* PHPExcel_CachedObjectStorageFactory
*
* @category PHPExcel
* @package PHPExcel_CachedObjectStorage
* @copyright Copyright (c) 2006 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)
*/
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';
/**
* Name of the method used for cell cacheing
*
* @var string
*/
private static $_cacheStorageMethod = NULL;
/**
* Name of the class used for cell cacheing
*
* @var string
*/
private static $_cacheStorageClass = NULL;
/**
* List of all possible cache storage methods
*
* @var string[]
*/
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,
);
/**
* Default arguments for each cache storage method
*
* @var array of mixed array
*/
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(
),
);
/**
* Arguments for the active cache storage method
*
* @var array of mixed array
*/
private static $_storageMethodParameters = array();
/**
* Return the current cache storage method
*
* @return string|NULL
**/
public static function getCacheStorageMethod()
{
if (self::$_cacheStorageMethod !== NULL) {
return self::$_cacheStorageMethod;
}
return NULL;
} // function getCacheStorageMethod()
/**
* Return the current cache storage class
*
* @return PHPExcel_CachedObjectStorage_ICache|NULL
**/
public static function getCacheStorageClass()
{
if (self::$_cacheStorageClass !== NULL) {
return self::$_cacheStorageClass;
}
return NULL;
} // function getCacheStorageClass()
/**
* Return the list of all possible cache storage methods
*
* @return string[]
**/
public static function getAllCacheStorageMethods()
{
return self::$_storageMethods;
} // function getCacheStorageMethods()
/**
* Return the list of all available cache storage methods
*
* @return string[]
**/
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()
/**
* Identify the cache storage method to use
*
* @param string $method Name of the method to use for cell cacheing
* @param array of mixed $arguments Additional arguments to pass to the cell caching class
* when instantiating
* @return boolean
**/
public static function initialize($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 => $v) {
if (isset(self::$_storageMethodParameters[$method][$k])) {
self::$_storageMethodParameters[$method][$k] = $v;
}
}
if (self::$_cacheStorageMethod === NULL) {
self::$_cacheStorageClass = 'PHPExcel_CachedObjectStorage_' . $method;
self::$_cacheStorageMethod = $method;
}
return TRUE;
} // function initialize()
/**
* Initialise the cache storage
*
* @param PHPExcel_Worksheet $parent Enable cell caching for this worksheet
* @return PHPExcel_CachedObjectStorage_ICache
**/
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()
}