审查视图

simplewind/vendor/phpoffice/phpexcel/Classes/PHPExcel/CachedObjectStorage/SQLite3.php 10.1 KB
lihan authored
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345
<?php
/**
 * PHPExcel
 *
 * Copyright (c) 2006 - 2014 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 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt	LGPL
 * @version    ##VERSION##, ##DATE##
 */


/**
 * PHPExcel_CachedObjectStorage_SQLite3
 *
 * @category   PHPExcel
 * @package    PHPExcel_CachedObjectStorage
 * @copyright  Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
 */
class PHPExcel_CachedObjectStorage_SQLite3 extends PHPExcel_CachedObjectStorage_CacheBase implements PHPExcel_CachedObjectStorage_ICache {

	/**
	 * Database table name
	 *
	 * @var string
	 */
	private $_TableName = null;

	/**
	 * Database handle
	 *
	 * @var resource
	 */
	private $_DBHandle = null;

	/**
	 * Prepared statement for a SQLite3 select query
	 *
	 * @var SQLite3Stmt
	 */
	private $_selectQuery;

	/**
	 * Prepared statement for a SQLite3 insert query
	 *
	 * @var SQLite3Stmt
	 */
	private $_insertQuery;

	/**
	 * Prepared statement for a SQLite3 update query
	 *
	 * @var SQLite3Stmt
	 */
	private $_updateQuery;

	/**
	 * Prepared statement for a SQLite3 delete query
	 *
	 * @var SQLite3Stmt
	 */
	private $_deleteQuery;

    /**
     * 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();

			$this->_insertQuery->bindValue('id',$this->_currentObjectID,SQLITE3_TEXT);
			$this->_insertQuery->bindValue('data',serialize($this->_currentObject),SQLITE3_BLOB);
			$result = $this->_insertQuery->execute();
			if ($result === false)
				throw new PHPExcel_Exception($this->_DBHandle->lastErrorMsg());
			$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	$cell		Cell to update
	 * @return	PHPExcel_Cell
     * @throws	PHPExcel_Exception
     */
	public function addCacheData($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 			$pCoord		Coordinate of the cell
     * @throws 	PHPExcel_Exception
     * @return 	PHPExcel_Cell 	Cell that was found, or null if not found
     */
	public function getCacheData($pCoord) {
		if ($pCoord === $this->_currentObjectID) {
			return $this->_currentObject;
		}
		$this->_storeData();

		$this->_selectQuery->bindValue('id',$pCoord,SQLITE3_TEXT);
		$cellResult = $this->_selectQuery->execute();
		if ($cellResult === FALSE) {
			throw new PHPExcel_Exception($this->_DBHandle->lastErrorMsg());
		}
		$cellData = $cellResult->fetchArray(SQLITE3_ASSOC);
		if ($cellData === FALSE) {
			//	Return null if requested entry doesn't exist in cache
			return NULL;
		}

		//	Set current entry to the requested entry
		$this->_currentObjectID = $pCoord;

		$this->_currentObject = unserialize($cellData['value']);
        //    Re-attach this as the cell's parent
        $this->_currentObject->attach($this);

		//	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
		$this->_selectQuery->bindValue('id',$pCoord,SQLITE3_TEXT);
		$cellResult = $this->_selectQuery->execute();
		if ($cellResult === FALSE) {
			throw new PHPExcel_Exception($this->_DBHandle->lastErrorMsg());
		}
		$cellData = $cellResult->fetchArray(SQLITE3_ASSOC);

		return ($cellData === FALSE) ? FALSE : TRUE;
	}	//	function isDataSet()


    /**
     *	Delete a cell in cache identified by coordinate address
     *
     * @param	string			$pCoord		Coordinate address of the cell to delete
     * @throws	PHPExcel_Exception
     */
	public function deleteCacheData($pCoord) {
		if ($pCoord === $this->_currentObjectID) {
			$this->_currentObject->detach();
			$this->_currentObjectID = $this->_currentObject = NULL;
		}

		//	Check if the requested entry exists in the cache
		$this->_deleteQuery->bindValue('id',$pCoord,SQLITE3_TEXT);
		$result = $this->_deleteQuery->execute();
		if ($result === FALSE)
			throw new PHPExcel_Exception($this->_DBHandle->lastErrorMsg());

		$this->_currentCellIsDirty = FALSE;
	}	//	function deleteCacheData()


	/**
	 * Move a cell object from one address to another
	 *
	 * @param	string		$fromAddress	Current address of the cell to move
	 * @param	string		$toAddress		Destination address of the cell to move
	 * @return	boolean
	 */
	public function moveCell($fromAddress, $toAddress) {
		if ($fromAddress === $this->_currentObjectID) {
			$this->_currentObjectID = $toAddress;
		}

		$this->_deleteQuery->bindValue('id',$toAddress,SQLITE3_TEXT);
		$result = $this->_deleteQuery->execute();
		if ($result === false)
			throw new PHPExcel_Exception($this->_DBHandle->lastErrorMsg());

		$this->_updateQuery->bindValue('toid',$toAddress,SQLITE3_TEXT);
		$this->_updateQuery->bindValue('fromid',$fromAddress,SQLITE3_TEXT);
		$result = $this->_updateQuery->execute();
		if ($result === false)
			throw new PHPExcel_Exception($this->_DBHandle->lastErrorMsg());

		return TRUE;
	}	//	function moveCell()


	/**
	 * Get a list of all cell addresses currently held in cache
	 *
	 * @return	string[]
	 */
	public function getCellList() {
		if ($this->_currentObjectID !== null) {
			$this->_storeData();
		}

		$query = "SELECT id FROM kvp_".$this->_TableName;
		$cellIdsResult = $this->_DBHandle->query($query);
		if ($cellIdsResult === false)
			throw new PHPExcel_Exception($this->_DBHandle->lastErrorMsg());

		$cellKeys = array();
		while ($row = $cellIdsResult->fetchArray(SQLITE3_ASSOC)) {
			$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) {
		$this->_currentCellIsDirty;
        $this->_storeData();

		//	Get a new id for the new table name
		$tableName = str_replace('.','_',$this->_getUniqueID());
		if (!$this->_DBHandle->exec('CREATE TABLE kvp_'.$tableName.' (id VARCHAR(12) PRIMARY KEY, value BLOB)
		                                       AS SELECT * FROM kvp_'.$this->_TableName))
			throw new PHPExcel_Exception($this->_DBHandle->lastErrorMsg());

		//	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:';

			$this->_DBHandle = new SQLite3($_DBName);
			if ($this->_DBHandle === false)
				throw new PHPExcel_Exception($this->_DBHandle->lastErrorMsg());
			if (!$this->_DBHandle->exec('CREATE TABLE kvp_'.$this->_TableName.' (id VARCHAR(12) PRIMARY KEY, value BLOB)'))
				throw new PHPExcel_Exception($this->_DBHandle->lastErrorMsg());
		}

		$this->_selectQuery = $this->_DBHandle->prepare("SELECT value FROM kvp_".$this->_TableName." WHERE id = :id");
		$this->_insertQuery = $this->_DBHandle->prepare("INSERT OR REPLACE INTO kvp_".$this->_TableName." VALUES(:id,:data)");
		$this->_updateQuery = $this->_DBHandle->prepare("UPDATE kvp_".$this->_TableName." SET id=:toId WHERE id=:fromId");
		$this->_deleteQuery = $this->_DBHandle->prepare("DELETE FROM kvp_".$this->_TableName." WHERE id = :id");
	}	//	function __construct()


	/**
	 * Destroy this cell collection
	 */
	public function __destruct() {
		if (!is_null($this->_DBHandle)) {
			$this->_DBHandle->exec('DROP TABLE kvp_'.$this->_TableName);
			$this->_DBHandle->close();
		}
		$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 (!class_exists('SQLite3',FALSE)) {
			return false;
		}

		return true;
	}

}