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307 lines
10 KiB
307 lines
10 KiB
<?php |
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/** |
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* PHPExcel_CachedObjectStorage_SQLite |
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* |
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* Copyright (c) 2006 - 2015 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 - 2015 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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class PHPExcel_CachedObjectStorage_SQLite extends PHPExcel_CachedObjectStorage_CacheBase implements PHPExcel_CachedObjectStorage_ICache |
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{ |
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/** |
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* Database table name |
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* |
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* @var string |
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*/ |
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private $TableName = null; |
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/** |
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* Database handle |
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* |
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* @var resource |
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*/ |
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private $DBHandle = null; |
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/** |
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* Store cell data in cache for the current cell object if it's "dirty", |
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* and the 'nullify' the current cell object |
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* |
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* @return void |
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* @throws PHPExcel_Exception |
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*/ |
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protected function storeData() |
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{ |
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if ($this->currentCellIsDirty && !empty($this->currentObjectID)) { |
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$this->currentObject->detach(); |
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if (!$this->DBHandle->queryExec("INSERT OR REPLACE INTO kvp_".$this->TableName." VALUES('".$this->currentObjectID."','".sqlite_escape_string(serialize($this->currentObject))."')")) { |
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throw new PHPExcel_Exception(sqlite_error_string($this->DBHandle->lastError())); |
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} |
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$this->currentCellIsDirty = false; |
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} |
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$this->currentObjectID = $this->currentObject = null; |
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} |
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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 $cell) |
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{ |
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if (($pCoord !== $this->currentObjectID) && ($this->currentObjectID !== null)) { |
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$this->storeData(); |
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} |
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$this->currentObjectID = $pCoord; |
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$this->currentObject = $cell; |
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$this->currentCellIsDirty = true; |
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return $cell; |
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} |
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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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{ |
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if ($pCoord === $this->currentObjectID) { |
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return $this->currentObject; |
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} |
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$this->storeData(); |
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$query = "SELECT value FROM kvp_".$this->TableName." WHERE id='".$pCoord."'"; |
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$cellResultSet = $this->DBHandle->query($query, SQLITE_ASSOC); |
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if ($cellResultSet === false) { |
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throw new PHPExcel_Exception(sqlite_error_string($this->DBHandle->lastError())); |
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} elseif ($cellResultSet->numRows() == 0) { |
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// Return null if requested entry doesn't exist in cache |
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return null; |
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} |
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// Set current entry to the requested entry |
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$this->currentObjectID = $pCoord; |
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$cellResult = $cellResultSet->fetchSingle(); |
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$this->currentObject = unserialize($cellResult); |
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// Re-attach this as the cell's parent |
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$this->currentObject->attach($this); |
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// Return requested entry |
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return $this->currentObject; |
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} |
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/** |
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* Is a value set for an indexed cell? |
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* |
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* @param string $pCoord Coordinate address of the cell to check |
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* @return boolean |
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*/ |
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public function isDataSet($pCoord) |
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{ |
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if ($pCoord === $this->currentObjectID) { |
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return true; |
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} |
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// Check if the requested entry exists in the cache |
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$query = "SELECT id FROM kvp_".$this->TableName." WHERE id='".$pCoord."'"; |
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$cellResultSet = $this->DBHandle->query($query, SQLITE_ASSOC); |
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if ($cellResultSet === false) { |
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throw new PHPExcel_Exception(sqlite_error_string($this->DBHandle->lastError())); |
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} elseif ($cellResultSet->numRows() == 0) { |
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// Return null if requested entry doesn't exist in cache |
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return false; |
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} |
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return true; |
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} |
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/** |
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* Delete a cell in cache identified by coordinate address |
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* |
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* @param string $pCoord Coordinate address of the cell to delete |
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* @throws PHPExcel_Exception |
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*/ |
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public function deleteCacheData($pCoord) |
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{ |
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if ($pCoord === $this->currentObjectID) { |
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$this->currentObject->detach(); |
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$this->currentObjectID = $this->currentObject = null; |
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} |
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// Check if the requested entry exists in the cache |
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$query = "DELETE FROM kvp_".$this->TableName." WHERE id='".$pCoord."'"; |
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if (!$this->DBHandle->queryExec($query)) { |
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throw new PHPExcel_Exception(sqlite_error_string($this->DBHandle->lastError())); |
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} |
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$this->currentCellIsDirty = false; |
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} |
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/** |
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* Move a cell object from one address to another |
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* |
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* @param string $fromAddress Current address of the cell to move |
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* @param string $toAddress Destination address of the cell to move |
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* @return boolean |
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*/ |
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public function moveCell($fromAddress, $toAddress) |
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{ |
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if ($fromAddress === $this->currentObjectID) { |
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$this->currentObjectID = $toAddress; |
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} |
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$query = "DELETE FROM kvp_".$this->TableName." WHERE id='".$toAddress."'"; |
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$result = $this->DBHandle->exec($query); |
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if ($result === false) { |
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throw new PHPExcel_Exception($this->DBHandle->lastErrorMsg()); |
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} |
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$query = "UPDATE kvp_".$this->TableName." SET id='".$toAddress."' WHERE id='".$fromAddress."'"; |
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$result = $this->DBHandle->exec($query); |
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if ($result === false) { |
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throw new PHPExcel_Exception($this->DBHandle->lastErrorMsg()); |
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} |
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return true; |
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} |
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/** |
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* Get a list of all cell addresses currently held in cache |
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* |
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* @return string[] |
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*/ |
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public function getCellList() |
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{ |
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if ($this->currentObjectID !== null) { |
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$this->storeData(); |
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} |
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$query = "SELECT id FROM kvp_".$this->TableName; |
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$cellIdsResult = $this->DBHandle->unbufferedQuery($query, SQLITE_ASSOC); |
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if ($cellIdsResult === false) { |
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throw new PHPExcel_Exception(sqlite_error_string($this->DBHandle->lastError())); |
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} |
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$cellKeys = array(); |
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foreach ($cellIdsResult as $row) { |
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$cellKeys[] = $row['id']; |
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} |
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return $cellKeys; |
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} |
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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 $parent) |
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{ |
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$this->currentCellIsDirty; |
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$this->storeData(); |
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// Get a new id for the new table name |
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$tableName = str_replace('.', '_', $this->getUniqueID()); |
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if (!$this->DBHandle->queryExec('CREATE TABLE kvp_'.$tableName.' (id VARCHAR(12) PRIMARY KEY, value BLOB) |
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AS SELECT * FROM kvp_'.$this->TableName) |
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) { |
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throw new PHPExcel_Exception(sqlite_error_string($this->DBHandle->lastError())); |
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} |
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// Copy the existing cell cache file |
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$this->TableName = $tableName; |
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} |
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/** |
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* Clear the cell collection and disconnect from our parent |
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* |
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* @return void |
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*/ |
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public function unsetWorksheetCells() |
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{ |
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if (!is_null($this->currentObject)) { |
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$this->currentObject->detach(); |
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$this->currentObject = $this->currentObjectID = null; |
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} |
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// detach ourself from the worksheet, so that it can then delete this object successfully |
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$this->parent = null; |
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// Close down the temporary cache file |
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$this->__destruct(); |
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} |
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/** |
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* Initialise this new cell collection |
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* |
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* @param PHPExcel_Worksheet $parent The worksheet for this cell collection |
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*/ |
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public function __construct(PHPExcel_Worksheet $parent) |
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{ |
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parent::__construct($parent); |
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if (is_null($this->DBHandle)) { |
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$this->TableName = str_replace('.', '_', $this->getUniqueID()); |
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$_DBName = ':memory:'; |
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$this->DBHandle = new SQLiteDatabase($_DBName); |
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if ($this->DBHandle === false) { |
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throw new PHPExcel_Exception(sqlite_error_string($this->DBHandle->lastError())); |
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} |
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if (!$this->DBHandle->queryExec('CREATE TABLE kvp_'.$this->TableName.' (id VARCHAR(12) PRIMARY KEY, value BLOB)')) { |
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throw new PHPExcel_Exception(sqlite_error_string($this->DBHandle->lastError())); |
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} |
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} |
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} |
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/** |
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* Destroy this cell collection |
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*/ |
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public function __destruct() |
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{ |
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if (!is_null($this->DBHandle)) { |
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$this->DBHandle->queryExec('DROP TABLE kvp_'.$this->TableName); |
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} |
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$this->DBHandle = null; |
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} |
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/** |
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* Identify whether the caching method is currently available |
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* Some methods are dependent on the availability of certain extensions being enabled in the PHP build |
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* |
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* @return boolean |
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*/ |
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public static function cacheMethodIsAvailable() |
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{ |
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if (!function_exists('sqlite_open')) { |
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return false; |
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} |
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return true; |
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} |
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}
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