<?php
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/**
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* PHPExcel
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*
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* Copyright (c) 2006 - 2012 PHPExcel
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* @category PHPExcel
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* @package PHPExcel
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* @copyright Copyright (c) 2006 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)
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* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
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* @version 1.7.7, 2012-05-19
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*/
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/**
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* PHPExcel_CachedObjectStorageFactory
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*
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* @category PHPExcel
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* @package PHPExcel_CachedObjectStorage
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* @copyright Copyright (c) 2006 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)
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*/
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class PHPExcel_CachedObjectStorageFactory
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{
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const cache_in_memory = 'Memory';
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const cache_in_memory_gzip = 'MemoryGZip';
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const cache_in_memory_serialized = 'MemorySerialized';
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const cache_igbinary = 'Igbinary';
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const cache_to_discISAM = 'DiscISAM';
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const cache_to_apc = 'APC';
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const cache_to_memcache = 'Memcache';
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const cache_to_phpTemp = 'PHPTemp';
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const cache_to_wincache = 'Wincache';
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const cache_to_sqlite = 'SQLite';
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const cache_to_sqlite3 = 'SQLite3';
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/**
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* Name of the method used for cell cacheing
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*
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* @var string
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*/
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private static $_cacheStorageMethod = NULL;
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/**
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* Name of the class used for cell cacheing
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*
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* @var string
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*/
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private static $_cacheStorageClass = NULL;
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/**
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* List of all possible cache storage methods
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*
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* @var string[]
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*/
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private static $_storageMethods = array(
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self::cache_in_memory,
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self::cache_in_memory_gzip,
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self::cache_in_memory_serialized,
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self::cache_igbinary,
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self::cache_to_phpTemp,
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self::cache_to_discISAM,
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self::cache_to_apc,
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self::cache_to_memcache,
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self::cache_to_wincache,
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self::cache_to_sqlite,
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self::cache_to_sqlite3,
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);
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/**
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* Default arguments for each cache storage method
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*
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* @var array of mixed array
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*/
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private static $_storageMethodDefaultParameters = array(
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self::cache_in_memory => array(
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),
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self::cache_in_memory_gzip => array(
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),
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self::cache_in_memory_serialized => array(
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),
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self::cache_igbinary => array(
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),
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self::cache_to_phpTemp => array( 'memoryCacheSize' => '1MB'
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),
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self::cache_to_discISAM => array( 'dir' => NULL
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),
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self::cache_to_apc => array( 'cacheTime' => 600
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),
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self::cache_to_memcache => array( 'memcacheServer' => 'localhost',
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'memcachePort' => 11211,
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'cacheTime' => 600
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),
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self::cache_to_wincache => array( 'cacheTime' => 600
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),
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self::cache_to_sqlite => array(
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),
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self::cache_to_sqlite3 => array(
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),
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);
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/**
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* Arguments for the active cache storage method
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*
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* @var array of mixed array
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*/
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private static $_storageMethodParameters = array();
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/**
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* Return the current cache storage method
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*
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* @return string|NULL
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**/
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public static function getCacheStorageMethod()
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{
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if (self::$_cacheStorageMethod !== NULL) {
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return self::$_cacheStorageMethod;
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}
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return NULL;
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} // function getCacheStorageMethod()
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/**
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* Return the current cache storage class
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*
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* @return PHPExcel_CachedObjectStorage_ICache|NULL
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**/
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public static function getCacheStorageClass()
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{
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if (self::$_cacheStorageClass !== NULL) {
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return self::$_cacheStorageClass;
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}
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return NULL;
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} // function getCacheStorageClass()
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/**
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* Return the list of all possible cache storage methods
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*
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* @return string[]
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**/
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public static function getAllCacheStorageMethods()
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{
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return self::$_storageMethods;
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} // function getCacheStorageMethods()
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/**
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* Return the list of all available cache storage methods
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*
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* @return string[]
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**/
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public static function getCacheStorageMethods()
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{
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$activeMethods = array();
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foreach(self::$_storageMethods as $storageMethod) {
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$cacheStorageClass = 'PHPExcel_CachedObjectStorage_' . $storageMethod;
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if (call_user_func(array($cacheStorageClass, 'cacheMethodIsAvailable'))) {
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$activeMethods[] = $storageMethod;
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}
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}
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return $activeMethods;
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} // function getCacheStorageMethods()
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/**
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* Identify the cache storage method to use
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*
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* @param string $method Name of the method to use for cell cacheing
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* @param array of mixed $arguments Additional arguments to pass to the cell caching class
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* when instantiating
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* @return boolean
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**/
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public static function initialize($method = self::cache_in_memory, $arguments = array())
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{
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if (!in_array($method,self::$_storageMethods)) {
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return FALSE;
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}
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$cacheStorageClass = 'PHPExcel_CachedObjectStorage_'.$method;
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if (!call_user_func(array( $cacheStorageClass,
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'cacheMethodIsAvailable'))) {
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return FALSE;
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}
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self::$_storageMethodParameters[$method] = self::$_storageMethodDefaultParameters[$method];
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foreach($arguments as $k => $v) {
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if (isset(self::$_storageMethodParameters[$method][$k])) {
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self::$_storageMethodParameters[$method][$k] = $v;
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}
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}
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if (self::$_cacheStorageMethod === NULL) {
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self::$_cacheStorageClass = 'PHPExcel_CachedObjectStorage_' . $method;
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self::$_cacheStorageMethod = $method;
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}
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return TRUE;
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} // function initialize()
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/**
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* Initialise the cache storage
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*
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* @param PHPExcel_Worksheet $parent Enable cell caching for this worksheet
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* @return PHPExcel_CachedObjectStorage_ICache
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**/
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public static function getInstance(PHPExcel_Worksheet $parent)
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{
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$cacheMethodIsAvailable = TRUE;
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if (self::$_cacheStorageMethod === NULL) {
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$cacheMethodIsAvailable = self::initialize();
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}
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if ($cacheMethodIsAvailable) {
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$instance = new self::$_cacheStorageClass( $parent,
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self::$_storageMethodParameters[self::$_cacheStorageMethod]
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);
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if ($instance !== NULL) {
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return $instance;
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}
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}
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return FALSE;
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} // function getInstance()
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}
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