source: pro-violet-viettel/sourcecode/application/libraries/PHPExcel/CachedObjectStorage/SQLite.php @ 289

Last change on this file since 289 was 289, checked in by dungnv, 11 years ago
File size: 9.6 KB
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[289]1<?php
2/**
3 * PHPExcel
4 *
5 * Copyright (c) 2006 - 2014 PHPExcel
6 *
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
20 *
21 * @category   PHPExcel
22 * @package    PHPExcel_CachedObjectStorage
23 * @copyright  Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
24 * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt    LGPL
25 * @version    1.8.0, 2014-03-02
26 */
27
28
29/**
30 * PHPExcel_CachedObjectStorage_SQLite
31 *
32 * @category   PHPExcel
33 * @package    PHPExcel_CachedObjectStorage
34 * @copyright  Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
35 */
36class PHPExcel_CachedObjectStorage_SQLite extends PHPExcel_CachedObjectStorage_CacheBase implements PHPExcel_CachedObjectStorage_ICache {
37
38        /**
39         * Database table name
40         *
41         * @var string
42         */
43        private $_TableName = null;
44
45        /**
46         * Database handle
47         *
48         * @var resource
49         */
50        private $_DBHandle = null;
51
52    /**
53     * Store cell data in cache for the current cell object if it's "dirty",
54     *     and the 'nullify' the current cell object
55     *
56         * @return      void
57     * @throws  PHPExcel_Exception
58     */
59        protected function _storeData() {
60                if ($this->_currentCellIsDirty && !empty($this->_currentObjectID)) {
61                        $this->_currentObject->detach();
62
63                        if (!$this->_DBHandle->queryExec("INSERT OR REPLACE INTO kvp_".$this->_TableName." VALUES('".$this->_currentObjectID."','".sqlite_escape_string(serialize($this->_currentObject))."')"))
64                                throw new PHPExcel_Exception(sqlite_error_string($this->_DBHandle->lastError()));
65                        $this->_currentCellIsDirty = false;
66                }
67                $this->_currentObjectID = $this->_currentObject = null;
68        }       //      function _storeData()
69
70
71    /**
72     * Add or Update a cell in cache identified by coordinate address
73     *
74     * @param   string                  $pCoord         Coordinate address of the cell to update
75     * @param   PHPExcel_Cell   $cell           Cell to update
76         * @return      void
77     * @throws  PHPExcel_Exception
78     */
79        public function addCacheData($pCoord, PHPExcel_Cell $cell) {
80                if (($pCoord !== $this->_currentObjectID) && ($this->_currentObjectID !== null)) {
81                        $this->_storeData();
82                }
83
84                $this->_currentObjectID = $pCoord;
85                $this->_currentObject = $cell;
86                $this->_currentCellIsDirty = true;
87
88                return $cell;
89        }       //      function addCacheData()
90
91
92    /**
93     * Get cell at a specific coordinate
94     *
95     * @param   string                  $pCoord         Coordinate of the cell
96     * @throws  PHPExcel_Exception
97     * @return  PHPExcel_Cell   Cell that was found, or null if not found
98     */
99        public function getCacheData($pCoord) {
100                if ($pCoord === $this->_currentObjectID) {
101                        return $this->_currentObject;
102                }
103                $this->_storeData();
104
105                $query = "SELECT value FROM kvp_".$this->_TableName." WHERE id='".$pCoord."'";
106                $cellResultSet = $this->_DBHandle->query($query,SQLITE_ASSOC);
107                if ($cellResultSet === false) {
108                        throw new PHPExcel_Exception(sqlite_error_string($this->_DBHandle->lastError()));
109                } elseif ($cellResultSet->numRows() == 0) {
110                        //      Return null if requested entry doesn't exist in cache
111                        return null;
112                }
113
114                //      Set current entry to the requested entry
115                $this->_currentObjectID = $pCoord;
116
117                $cellResult = $cellResultSet->fetchSingle();
118                $this->_currentObject = unserialize($cellResult);
119        //    Re-attach this as the cell's parent
120        $this->_currentObject->attach($this);
121
122                //      Return requested entry
123                return $this->_currentObject;
124        }       //      function getCacheData()
125
126
127        /**
128         * Is a value set for an indexed cell?
129         *
130         * @param       string          $pCoord         Coordinate address of the cell to check
131         * @return      boolean
132         */
133        public function isDataSet($pCoord) {
134                if ($pCoord === $this->_currentObjectID) {
135                        return true;
136                }
137
138                //      Check if the requested entry exists in the cache
139                $query = "SELECT id FROM kvp_".$this->_TableName." WHERE id='".$pCoord."'";
140                $cellResultSet = $this->_DBHandle->query($query,SQLITE_ASSOC);
141                if ($cellResultSet === false) {
142                        throw new PHPExcel_Exception(sqlite_error_string($this->_DBHandle->lastError()));
143                } elseif ($cellResultSet->numRows() == 0) {
144                        //      Return null if requested entry doesn't exist in cache
145                        return false;
146                }
147                return true;
148        }       //      function isDataSet()
149
150
151    /**
152     * Delete a cell in cache identified by coordinate address
153     *
154     * @param   string                  $pCoord         Coordinate address of the cell to delete
155     * @throws  PHPExcel_Exception
156     */
157        public function deleteCacheData($pCoord) {
158                if ($pCoord === $this->_currentObjectID) {
159                        $this->_currentObject->detach();
160                        $this->_currentObjectID = $this->_currentObject = null;
161                }
162
163                //      Check if the requested entry exists in the cache
164                $query = "DELETE FROM kvp_".$this->_TableName." WHERE id='".$pCoord."'";
165                if (!$this->_DBHandle->queryExec($query))
166                        throw new PHPExcel_Exception(sqlite_error_string($this->_DBHandle->lastError()));
167
168                $this->_currentCellIsDirty = false;
169        }       //      function deleteCacheData()
170
171
172        /**
173         * Move a cell object from one address to another
174         *
175         * @param       string          $fromAddress    Current address of the cell to move
176         * @param       string          $toAddress              Destination address of the cell to move
177         * @return      boolean
178         */
179        public function moveCell($fromAddress, $toAddress) {
180                if ($fromAddress === $this->_currentObjectID) {
181                        $this->_currentObjectID = $toAddress;
182                }
183
184                $query = "DELETE FROM kvp_".$this->_TableName." WHERE id='".$toAddress."'";
185                $result = $this->_DBHandle->exec($query);
186                if ($result === false)
187                        throw new PHPExcel_Exception($this->_DBHandle->lastErrorMsg());
188
189                $query = "UPDATE kvp_".$this->_TableName." SET id='".$toAddress."' WHERE id='".$fromAddress."'";
190                $result = $this->_DBHandle->exec($query);
191                if ($result === false)
192                        throw new PHPExcel_Exception($this->_DBHandle->lastErrorMsg());
193
194                return TRUE;
195        }       //      function moveCell()
196
197
198        /**
199         * Get a list of all cell addresses currently held in cache
200         *
201         * @return      array of string
202         */
203        public function getCellList() {
204                if ($this->_currentObjectID !== null) {
205                        $this->_storeData();
206                }
207
208                $query = "SELECT id FROM kvp_".$this->_TableName;
209                $cellIdsResult = $this->_DBHandle->unbufferedQuery($query,SQLITE_ASSOC);
210                if ($cellIdsResult === false)
211                        throw new PHPExcel_Exception(sqlite_error_string($this->_DBHandle->lastError()));
212
213                $cellKeys = array();
214                foreach($cellIdsResult as $row) {
215                        $cellKeys[] = $row['id'];
216                }
217
218                return $cellKeys;
219        }       //      function getCellList()
220
221
222        /**
223         * Clone the cell collection
224         *
225         * @param       PHPExcel_Worksheet      $parent         The new worksheet
226         * @return      void
227         */
228        public function copyCellCollection(PHPExcel_Worksheet $parent) {
229                $this->_currentCellIsDirty;
230        $this->_storeData();
231
232                //      Get a new id for the new table name
233                $tableName = str_replace('.','_',$this->_getUniqueID());
234                if (!$this->_DBHandle->queryExec('CREATE TABLE kvp_'.$tableName.' (id VARCHAR(12) PRIMARY KEY, value BLOB)
235                                                                                                        AS SELECT * FROM kvp_'.$this->_TableName))
236                        throw new PHPExcel_Exception(sqlite_error_string($this->_DBHandle->lastError()));
237
238                //      Copy the existing cell cache file
239                $this->_TableName = $tableName;
240        }       //      function copyCellCollection()
241
242
243        /**
244         * Clear the cell collection and disconnect from our parent
245         *
246         * @return      void
247         */
248        public function unsetWorksheetCells() {
249                if(!is_null($this->_currentObject)) {
250                        $this->_currentObject->detach();
251                        $this->_currentObject = $this->_currentObjectID = null;
252                }
253                //      detach ourself from the worksheet, so that it can then delete this object successfully
254                $this->_parent = null;
255
256                //      Close down the temporary cache file
257                $this->__destruct();
258        }       //      function unsetWorksheetCells()
259
260
261        /**
262         * Initialise this new cell collection
263         *
264         * @param       PHPExcel_Worksheet      $parent         The worksheet for this cell collection
265         */
266        public function __construct(PHPExcel_Worksheet $parent) {
267                parent::__construct($parent);
268                if (is_null($this->_DBHandle)) {
269                        $this->_TableName = str_replace('.','_',$this->_getUniqueID());
270                        $_DBName = ':memory:';
271
272                        $this->_DBHandle = new SQLiteDatabase($_DBName);
273                        if ($this->_DBHandle === false)
274                                throw new PHPExcel_Exception(sqlite_error_string($this->_DBHandle->lastError()));
275                        if (!$this->_DBHandle->queryExec('CREATE TABLE kvp_'.$this->_TableName.' (id VARCHAR(12) PRIMARY KEY, value BLOB)'))
276                                throw new PHPExcel_Exception(sqlite_error_string($this->_DBHandle->lastError()));
277                }
278        }       //      function __construct()
279
280
281        /**
282         * Destroy this cell collection
283         */
284        public function __destruct() {
285                if (!is_null($this->_DBHandle)) {
286                        $this->_DBHandle->queryExec('DROP TABLE kvp_'.$this->_TableName);
287                }
288                $this->_DBHandle = null;
289        }       //      function __destruct()
290
291
292        /**
293         * Identify whether the caching method is currently available
294         * Some methods are dependent on the availability of certain extensions being enabled in the PHP build
295         *
296         * @return      boolean
297         */
298        public static function cacheMethodIsAvailable() {
299                if (!function_exists('sqlite_open')) {
300                        return false;
301                }
302
303                return true;
304        }
305
306}
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