3886c47ebe
Refactoring of calculation engine for improved performance and memory usage Refactoring of cell object to eliminate data duplication and reduce memory
126 lines
3.8 KiB
PHP
126 lines
3.8 KiB
PHP
<?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_CachedObjectStorage
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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 ##VERSION##, ##DATE##
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*/
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/**
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* PHPExcel_CachedObjectStorage_Memory
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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_CachedObjectStorage_Memory extends PHPExcel_CachedObjectStorage_CacheBase implements PHPExcel_CachedObjectStorage_ICache {
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/**
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* Dummy method callable from CacheBase, but unused by Memory cache
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*
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* @return void
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*/
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protected function _storeData() {
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} // function _storeData()
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/**
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* Add or Update a cell in cache identified by coordinate address
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*
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* @param string $pCoord Coordinate address of the cell to update
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* @param PHPExcel_Cell $cell Cell to update
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* @return PHPExcel_Cell
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* @throws PHPExcel_Exception
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*/
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public function addCacheData($pCoord, PHPExcel_Cell $cell) {
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$this->_cellCache[$pCoord] = $cell;
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// Set current entry to the new/updated entry
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$this->_currentObjectID = $pCoord;
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return $cell;
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} // function addCacheData()
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/**
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* Get cell at a specific coordinate
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*
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* @param string $pCoord Coordinate of the cell
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* @throws PHPExcel_Exception
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* @return PHPExcel_Cell Cell that was found, or null if not found
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*/
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public function getCacheData($pCoord) {
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// Check if the entry that has been requested actually exists
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if (!isset($this->_cellCache[$pCoord])) {
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$this->_currentObjectID = NULL;
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// Return null if requested entry doesn't exist in cache
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return null;
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}
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// Set current entry to the requested entry
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$this->_currentObjectID = $pCoord;
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// Return requested entry
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return $this->_cellCache[$pCoord];
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} // function getCacheData()
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/**
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* Clone the cell collection
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*
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* @param PHPExcel_Worksheet $parent The new worksheet
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* @return void
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*/
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public function copyCellCollection(PHPExcel_Worksheet $parent) {
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parent::copyCellCollection($parent);
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$newCollection = array();
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foreach($this->_cellCache as $k => &$cell) {
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$newCollection[$k] = clone $cell;
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$newCollection[$k]->attach($parent);
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}
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$this->_cellCache = $newCollection;
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}
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/**
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* Clear the cell collection and disconnect from our parent
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*
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* @return void
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*/
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public function unsetWorksheetCells() {
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// Because cells are all stored as intact objects in memory, we need to detach each one from the parent
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foreach($this->_cellCache as $k => &$cell) {
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$cell->detach();
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$this->_cellCache[$k] = null;
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}
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unset($cell);
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$this->_cellCache = array();
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// detach ourself from the worksheet, so that it can then delete this object successfully
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$this->_parent = null;
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} // function unsetWorksheetCells()
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}
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