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- <?php
- /**
- * Created by PhpStorm.
- * User: phperstar
- * Date: 2020/8/10
- * Time: 6:18 PM
- */
- namespace Util\PHPExcel\CachedObjectStorage;
- use Util\PHPExcel\Cell;
- use Util\PHPExcel\CachedObjectStorage\CacheBase;
- use Util\PHPExcel\CachedObjectStorage\ICache;
- class MemorySerialized extends CacheBase implements ICache
- {
- /**
- * Add or Update a cell in cache identified by coordinate address
- *
- * @param string $pCoord Coordinate address of the cell to update
- * @param PHPExcel_Cell $cell Cell to update
- * @return PHPExcel_Cell
- */
- public function addCacheData($pCoord, Cell $cell)
- {
- if (($pCoord !== $this->currentObjectID) && ($this->currentObjectID !== null)) {
- $this->storeData();
- }
- $this->currentObjectID = $pCoord;
- $this->currentObject = $cell;
- $this->currentCellIsDirty = true;
- return $cell;
- }
- /**
- * Store cell data in cache for the current cell object if it's "dirty",
- * and the 'nullify' the current cell object
- *
- * @return void
- * @throws PHPExcel_Exception
- */
- protected function storeData()
- {
- if ($this->currentCellIsDirty && !empty($this->currentObjectID)) {
- $this->currentObject->detach();
- $this->cellCache[$this->currentObjectID] = serialize($this->currentObject);
- $this->currentCellIsDirty = false;
- }
- $this->currentObjectID = $this->currentObject = null;
- }
- /**
- * 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)
- {
- if ($pCoord === $this->currentObjectID) {
- return $this->currentObject;
- }
- $this->storeData();
- // Check if the entry that has been requested actually exists
- if (!isset($this->cellCache[$pCoord])) {
- // Return null if requested entry doesn't exist in cache
- return null;
- }
- // Set current entry to the requested entry
- $this->currentObjectID = $pCoord;
- $this->currentObject = unserialize($this->cellCache[$pCoord]);
- // Re-attach this as the cell's parent
- $this->currentObject->attach($this);
- // Return requested entry
- return $this->currentObject;
- }
- /**
- * Get a list of all cell addresses currently held in cache
- *
- * @return string[]
- */
- public function getCellList()
- {
- if ($this->currentObjectID !== null) {
- $this->storeData();
- }
- return parent::getCellList();
- }
- /**
- * Clear the cell collection and disconnect from our parent
- *
- * @return void
- */
- public function unsetWorksheetCells()
- {
- if (!is_null($this->currentObject)) {
- $this->currentObject->detach();
- $this->currentObject = $this->currentObjectID = null;
- }
- $this->cellCache = array();
- // detach ourself from the worksheet, so that it can then delete this object successfully
- $this->parent = null;
- }
- }
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