4 * PHPExcel_CachedObjectStorage_Igbinary
6 * Copyright (c) 2006 - 2015 PHPExcel
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; either
11 * version 2.1 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 * @package PHPExcel_CachedObjectStorage
24 * @copyright Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
25 * @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
26 * @version ##VERSION##, ##DATE##
28 class PHPExcel_CachedObjectStorage_Igbinary extends PHPExcel_CachedObjectStorage_CacheBase implements PHPExcel_CachedObjectStorage_ICache
31 * Store cell data in cache for the current cell object if it's "dirty",
32 * and the 'nullify' the current cell object
35 * @throws PHPExcel_Exception
37 protected function storeData()
39 if ($this->currentCellIsDirty && !empty($this->currentObjectID)) {
40 $this->currentObject->detach();
42 $this->cellCache[$this->currentObjectID] = igbinary_serialize($this->currentObject);
43 $this->currentCellIsDirty = false;
45 $this->currentObjectID = $this->currentObject = null;
46 } // function _storeData()
50 * Add or Update a cell in cache identified by coordinate address
52 * @param string $pCoord Coordinate address of the cell to update
53 * @param PHPExcel_Cell $cell Cell to update
54 * @return PHPExcel_Cell
55 * @throws PHPExcel_Exception
57 public function addCacheData($pCoord, PHPExcel_Cell $cell)
59 if (($pCoord !== $this->currentObjectID) && ($this->currentObjectID !== null)) {
63 $this->currentObjectID = $pCoord;
64 $this->currentObject = $cell;
65 $this->currentCellIsDirty = true;
68 } // function addCacheData()
72 * Get cell at a specific coordinate
74 * @param string $pCoord Coordinate of the cell
75 * @throws PHPExcel_Exception
76 * @return PHPExcel_Cell Cell that was found, or null if not found
78 public function getCacheData($pCoord)
80 if ($pCoord === $this->currentObjectID) {
81 return $this->currentObject;
85 // Check if the entry that has been requested actually exists
86 if (!isset($this->cellCache[$pCoord])) {
87 // Return null if requested entry doesn't exist in cache
91 // Set current entry to the requested entry
92 $this->currentObjectID = $pCoord;
93 $this->currentObject = igbinary_unserialize($this->cellCache[$pCoord]);
94 // Re-attach this as the cell's parent
95 $this->currentObject->attach($this);
97 // Return requested entry
98 return $this->currentObject;
99 } // function getCacheData()
103 * Get a list of all cell addresses currently held in cache
107 public function getCellList()
109 if ($this->currentObjectID !== null) {
113 return parent::getCellList();
118 * Clear the cell collection and disconnect from our parent
122 public function unsetWorksheetCells()
124 if (!is_null($this->currentObject)) {
125 $this->currentObject->detach();
126 $this->currentObject = $this->currentObjectID = null;
128 $this->cellCache = array();
130 // detach ourself from the worksheet, so that it can then delete this object successfully
131 $this->parent = null;
132 } // function unsetWorksheetCells()
136 * Identify whether the caching method is currently available
137 * Some methods are dependent on the availability of certain extensions being enabled in the PHP build
141 public static function cacheMethodIsAvailable()
143 if (!function_exists('igbinary_serialize')) {