File Source for IOFactory.php

<?php
/**
* PHPExcel
*
* Copyright (c) 2006 - 2011 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
* @copyright Copyright (c) 2006 - 2011 PHPExcel (http://www.codeplex.com/PHPExcel)
* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
* @version 1.7.6, 2011-02-27
*/
/** PHPExcel root directory */
if (!defined('PHPEXCEL_ROOT')) {
/**
* @ignore
*/
define('PHPEXCEL_ROOT', dirname(__FILE__) . '/../');
require(PHPEXCEL_ROOT . 'PHPExcel/Autoloader.php');
}
/**
* PHPExcel_IOFactory
*
* @category PHPExcel
* @package PHPExcel
* @copyright Copyright (c) 2006 - 2011 PHPExcel (http://www.codeplex.com/PHPExcel)
*/
class PHPExcel_IOFactory
{
/**
* Search locations
*
* @var array
* @access private
* @static
*/
private static $_searchLocations = array(
array( 'type' => 'IWriter', 'path' => 'PHPExcel/Writer/{0}.php', 'class' => 'PHPExcel_Writer_{0}' ),
array( 'type' => 'IReader', 'path' => 'PHPExcel/Reader/{0}.php', 'class' => 'PHPExcel_Reader_{0}' )
);
/**
* Autoresolve classes
*
* @var array
* @access private
* @static
*/
private static $_autoResolveClasses = array(
'Excel2007',
'Excel5',
'Excel2003XML',
'OOCalc',
'SYLK',
'Gnumeric',
'CSV',
);
/**
* Private constructor for PHPExcel_IOFactory
*/
private function __construct() { }
/**
* Get search locations
*
* @static
* @access public
* @return array
*/
public static function getSearchLocations() {
return self::$_searchLocations;
} // function getSearchLocations()
/**
* Set search locations
*
* @static
* @access public
* @param array $value
* @throws Exception
*/
public static function setSearchLocations($value) {
if (is_array($value)) {
self::$_searchLocations = $value;
} else {
throw new Exception('Invalid parameter passed.');
}
} // function setSearchLocations()
/**
* Add search location
*
* @static
* @access public
* @param string $type Example: IWriter
* @param string $location Example: PHPExcel/Writer/{0}.php
* @param string $classname Example: PHPExcel_Writer_{0}
*/
public static function addSearchLocation($type = '', $location = '', $classname = '') {
self::$_searchLocations[] = array( 'type' => $type, 'path' => $location, 'class' => $classname );
} // function addSearchLocation()
/**
* Create PHPExcel_Writer_IWriter
*
* @static
* @access public
* @param PHPExcel $phpExcel
* @param string $writerType Example: Excel2007
* @return PHPExcel_Writer_IWriter
* @throws Exception
*/
public static function createWriter(PHPExcel $phpExcel, $writerType = '') {
// Search type
$searchType = 'IWriter';
// Include class
foreach (self::$_searchLocations as $searchLocation) {
if ($searchLocation['type'] == $searchType) {
$className = str_replace('{0}', $writerType, $searchLocation['class']);
$classFile = str_replace('{0}', $writerType, $searchLocation['path']);
$instance = new $className($phpExcel);
if (!is_null($instance)) {
return $instance;
}
}
}
// Nothing found...
throw new Exception("No $searchType found for type $writerType");
} // function createWriter()
/**
* Create PHPExcel_Reader_IReader
*
* @static
* @access public
* @param string $readerType Example: Excel2007
* @return PHPExcel_Reader_IReader
* @throws Exception
*/
public static function createReader($readerType = '') {
// Search type
$searchType = 'IReader';
// Include class
foreach (self::$_searchLocations as $searchLocation) {
if ($searchLocation['type'] == $searchType) {
$className = str_replace('{0}', $readerType, $searchLocation['class']);
$classFile = str_replace('{0}', $readerType, $searchLocation['path']);
$instance = new $className();
if (!is_null($instance)) {
return $instance;
}
}
}
// Nothing found...
throw new Exception("No $searchType found for type $readerType");
} // function createReader()
/**
* Loads PHPExcel from file using automatic PHPExcel_Reader_IReader resolution
*
* @static
* @access public
* @param string $pFileName
* @return PHPExcel
* @throws Exception
*/
public static function load($pFilename) {
$reader = self::createReaderForFile($pFilename);
return $reader->load($pFilename);
} // function load()
/**
* Identify file type using automatic PHPExcel_Reader_IReader resolution
*
* @static
* @access public
* @param string $pFileName
* @return string
* @throws Exception
*/
public static function identify($pFilename) {
$reader = self::createReaderForFile($pFilename);
$className = get_class($reader);
$classType = explode('_',$className);
unset($reader);
return array_pop($classType);
} // function identify()
/**
* Create PHPExcel_Reader_IReader for file using automatic PHPExcel_Reader_IReader resolution
*
* @static
* @access public
* @param string $pFileName
* @return PHPExcel_Reader_IReader
* @throws Exception
*/
public static function createReaderForFile($pFilename) {
// First, lucky guess by inspecting file extension
$pathinfo = pathinfo($pFilename);
if (isset($pathinfo['extension'])) {
switch (strtolower($pathinfo['extension'])) {
case 'xlsx':
$reader = self::createReader('Excel2007');
break;
case 'xls':
$reader = self::createReader('Excel5');
break;
case 'ods':
$reader = self::createReader('OOCalc');
break;
case 'slk':
$reader = self::createReader('SYLK');
break;
case 'xml':
$reader = self::createReader('Excel2003XML');
break;
case 'gnumeric':
$reader = self::createReader('Gnumeric');
break;
case 'csv':
// Do nothing
// We must not try to use CSV reader since it loads
// all files including Excel files etc.
break;
default:
break;
}
// Let's see if we are lucky
if (isset($reader) && $reader->canRead($pFilename)) {
return $reader;
}
}
// If we reach here then "lucky guess" didn't give any result
// Try loading using self::$_autoResolveClasses
foreach (self::$_autoResolveClasses as $autoResolveClass) {
$reader = self::createReader($autoResolveClass);
if ($reader->canRead($pFilename)) {
return $reader;
}
}
} // function createReaderForFile()
}

Source for file IOFactory.php