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<?php
/**
* PHPExcel_CachedObjectStorage_Memory
*
* Copyright (c) 2006 - 2015 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_CachedObjectStorage
* @copyright Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
* @version ##VERSION##, ##DATE##
*/
class PHPExcel_CachedObjectStorage_Memory extends PHPExcel_CachedObjectStorage_CacheBase implements PHPExcel_CachedObjectStorage_ICache
{
/**
* Dummy method callable from CacheBase, but unused by Memory cache
*
* @return void
*/
protected function storeData()
{
}
/**
* Add or Update a cell in cache identified by coordinate address
*
* @param string $pCoord Coordinate address of the cell to update
* @param PHPExcel_Cell $cell Cell to update
* @return PHPExcel_Cell
* @throws PHPExcel_Exception
*/
public function addCacheData($pCoord, PHPExcel_Cell $cell)
{
$this->cellCache[$pCoord] = $cell;
// Set current entry to the new/updated entry
$this->currentObjectID = $pCoord;
return $cell;
}
/**
* Get cell at a specific coordinate
*
* @param string $pCoord Coordinate of the cell
* @throws PHPExcel_Exception
* @return PHPExcel_Cell Cell that was found, or null if not found
*/
public function getCacheData($pCoord)
{
// Check if the entry that has been requested actually exists
if (!isset($this->cellCache[$pCoord])) {
$this->currentObjectID = null;
// Return null if requested entry doesn't exist in cache
return null;
}
// Set current entry to the requested entry
$this->currentObjectID = $pCoord;
// Return requested entry
return $this->cellCache[$pCoord];
}
/**
* Clone the cell collection
*
* @param PHPExcel_Worksheet $parent The new worksheet
*/
public function copyCellCollection(PHPExcel_Worksheet $parent)
{
parent::copyCellCollection($parent);
$newCollection = array();
foreach ($this->cellCache as $k => &$cell) {
$newCollection[$k] = clone $cell;
$newCollection[$k]->attach($this);
}
$this->cellCache = $newCollection;
}
/**
* Clear the cell collection and disconnect from our parent
*
*/
public function unsetWorksheetCells()
{
// Because cells are all stored as intact objects in memory, we need to detach each one from the parent
foreach ($this->cellCache as $k => &$cell) {
$cell->detach();
$this->cellCache[$k] = null;
}
unset($cell);
$this->cellCache = array();
// detach ourself from the worksheet, so that it can then delete this object successfully
$this->parent = null;
}
}