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Diffstat (limited to '')
| -rw-r--r-- | admin/survey/excel/PHPExcel/CachedObjectStorage/SQLite.php | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/admin/survey/excel/PHPExcel/CachedObjectStorage/SQLite.php b/admin/survey/excel/PHPExcel/CachedObjectStorage/SQLite.php new file mode 100644 index 0000000..515573d --- /dev/null +++ b/admin/survey/excel/PHPExcel/CachedObjectStorage/SQLite.php @@ -0,0 +1,270 @@ +<?php
+/**
+ * PHPExcel
+ *
+ * Copyright (c) 2006 - 2012 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 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)
+ * @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
+ * @version 1.7.8, 2012-10-12
+ */
+
+
+/**
+ * PHPExcel_CachedObjectStorage_SQLite
+ *
+ * @category PHPExcel
+ * @package PHPExcel_CachedObjectStorage
+ * @copyright Copyright (c) 2006 - 2012 PHPExcel (http://www.codeplex.com/PHPExcel)
+ */
+class PHPExcel_CachedObjectStorage_SQLite extends PHPExcel_CachedObjectStorage_CacheBase implements PHPExcel_CachedObjectStorage_ICache {
+
+ /**
+ * Database table name
+ *
+ * @var string
+ */
+ private $_TableName = null;
+
+ /**
+ * Database handle
+ *
+ * @var resource
+ */
+ private $_DBHandle = null;
+
+ /**
+ * Store cell data in cache for the current cell object if it's "dirty",
+ * and the 'nullify' the current cell object
+ *
+ * @return void
+ * @throws Exception
+ */
+ private function _storeData() {
+ if ($this->_currentCellIsDirty) {
+ $this->_currentObject->detach();
+
+ if (!$this->_DBHandle->queryExec("INSERT OR REPLACE INTO kvp_".$this->_TableName." VALUES('".$this->_currentObjectID."','".sqlite_escape_string(serialize($this->_currentObject))."')"))
+ throw new Exception(sqlite_error_string($this->_DBHandle->lastError()));
+ $this->_currentCellIsDirty = false;
+ }
+ $this->_currentObjectID = $this->_currentObject = null;
+ } // 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 $cell Cell to update
+ * @return void
+ * @throws Exception
+ */
+ public function addCacheData($pCoord, PHPExcel_Cell $cell) {
+ if (($pCoord !== $this->_currentObjectID) && ($this->_currentObjectID !== null)) {
+ $this->_storeData();
+ }
+
+ $this->_currentObjectID = $pCoord;
+ $this->_currentObject = $cell;
+ $this->_currentCellIsDirty = true;
+
+ return $cell;
+ } // function addCacheData()
+
+
+ /**
+ * Get cell at a specific coordinate
+ *
+ * @param string $pCoord Coordinate of the cell
+ * @throws Exception
+ * @return PHPExcel_Cell Cell that was found, or null if not found
+ */
+ public function getCacheData($pCoord) {
+ if ($pCoord === $this->_currentObjectID) {
+ return $this->_currentObject;
+ }
+ $this->_storeData();
+
+ $query = "SELECT value FROM kvp_".$this->_TableName." WHERE id='".$pCoord."'";
+ $cellResultSet = $this->_DBHandle->query($query,SQLITE_ASSOC);
+ if ($cellResultSet === false) {
+ throw new Exception(sqlite_error_string($this->_DBHandle->lastError()));
+ } elseif ($cellResultSet->numRows() == 0) {
+ // Return null if requested entry doesn't exist in cache
+ return null;
+ }
+
+ // Set current entry to the requested entry
+ $this->_currentObjectID = $pCoord;
+
+ $cellResult = $cellResultSet->fetchSingle();
+ $this->_currentObject = unserialize($cellResult);
+ // Re-attach the parent worksheet
+ $this->_currentObject->attach($this->_parent);
+
+ // Return requested entry
+ return $this->_currentObject;
+ } // function getCacheData()
+
+
+ /**
+ * Is a value set for an indexed cell?
+ *
+ * @param string $pCoord Coordinate address of the cell to check
+ * @return boolean
+ */
+ public function isDataSet($pCoord) {
+ if ($pCoord === $this->_currentObjectID) {
+ return true;
+ }
+
+ // Check if the requested entry exists in the cache
+ $query = "SELECT id FROM kvp_".$this->_TableName." WHERE id='".$pCoord."'";
+ $cellResultSet = $this->_DBHandle->query($query,SQLITE_ASSOC);
+ if ($cellResultSet === false) {
+ throw new Exception(sqlite_error_string($this->_DBHandle->lastError()));
+ } elseif ($cellResultSet->numRows() == 0) {
+ // Return null if requested entry doesn't exist in cache
+ return false;
+ }
+ return true;
+ } // function isDataSet()
+
+
+ /**
+ * Delete a cell in cache identified by coordinate address
+ *
+ * @param string $pCoord Coordinate address of the cell to delete
+ * @throws Exception
+ */
+ public function deleteCacheData($pCoord) {
+ if ($pCoord === $this->_currentObjectID) {
+ $this->_currentObject->detach();
+ $this->_currentObjectID = $this->_currentObject = null;
+ }
+
+ // Check if the requested entry exists in the cache
+ $query = "DELETE FROM kvp_".$this->_TableName." WHERE id='".$pCoord."'";
+ if (!$this->_DBHandle->queryExec($query))
+ throw new Exception(sqlite_error_string($this->_DBHandle->lastError()));
+
+ $this->_currentCellIsDirty = false;
+ } // function deleteCacheData()
+
+
+ /**
+ * Get a list of all cell addresses currently held in cache
+ *
+ * @return array of string
+ */
+ public function getCellList() {
+ $query = "SELECT id FROM kvp_".$this->_TableName;
+ $cellIdsResult = $this->_DBHandle->unbufferedQuery($query,SQLITE_ASSOC);
+ if ($cellIdsResult === false)
+ throw new Exception(sqlite_error_string($this->_DBHandle->lastError()));
+
+ $cellKeys = array();
+ foreach($cellIdsResult as $row) {
+ $cellKeys[] = $row['id'];
+ }
+
+ return $cellKeys;
+ } // function getCellList()
+
+
+ /**
+ * Clone the cell collection
+ *
+ * @param PHPExcel_Worksheet $parent The new worksheet
+ * @return void
+ */
+ public function copyCellCollection(PHPExcel_Worksheet $parent) {
+ // Get a new id for the new table name
+ $tableName = str_replace('.','_',$this->_getUniqueID());
+ if (!$this->_DBHandle->queryExec('CREATE TABLE kvp_'.$tableName.' (id VARCHAR(12) PRIMARY KEY, value BLOB)
+ AS SELECT * FROM kvp_'.$this->_TableName))
+ throw new Exception(sqlite_error_string($this->_DBHandle->lastError()));
+
+ // Copy the existing cell cache file
+ $this->_TableName = $tableName;
+ } // function copyCellCollection()
+
+
+ /**
+ * Clear the cell collection and disconnect from our parent
+ *
+ * @return void
+ */
+ public function unsetWorksheetCells() {
+ if(!is_null($this->_currentObject)) {
+ $this->_currentObject->detach();
+ $this->_currentObject = $this->_currentObjectID = null;
+ }
+ // detach ourself from the worksheet, so that it can then delete this object successfully
+ $this->_parent = null;
+
+ // Close down the temporary cache file
+ $this->__destruct();
+ } // function unsetWorksheetCells()
+
+
+ /**
+ * Initialise this new cell collection
+ *
+ * @param PHPExcel_Worksheet $parent The worksheet for this cell collection
+ */
+ public function __construct(PHPExcel_Worksheet $parent) {
+ parent::__construct($parent);
+ if (is_null($this->_DBHandle)) {
+ $this->_TableName = str_replace('.','_',$this->_getUniqueID());
+ $_DBName = ':memory:';
+
+ $this->_DBHandle = new SQLiteDatabase($_DBName);
+ if ($this->_DBHandle === false)
+ throw new Exception(sqlite_error_string($this->_DBHandle->lastError()));
+ if (!$this->_DBHandle->queryExec('CREATE TABLE kvp_'.$this->_TableName.' (id VARCHAR(12) PRIMARY KEY, value BLOB)'))
+ throw new Exception(sqlite_error_string($this->_DBHandle->lastError()));
+ }
+ } // function __construct()
+
+
+ /**
+ * Destroy this cell collection
+ */
+ public function __destruct() {
+ $this->_DBHandle = null;
+ } // function __destruct()
+
+
+ /**
+ * Identify whether the caching method is currently available
+ * Some methods are dependent on the availability of certain extensions being enabled in the PHP build
+ *
+ * @return boolean
+ */
+ public static function cacheMethodIsAvailable() {
+ if (!function_exists('sqlite_open')) {
+ return false;
+ }
+
+ return true;
+ }
+
+}
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