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<?php
/**
* Class with static methods for loading classes and files
*
* PHP version 5
*
* LICENSE:
*
* Copyright (c) 2006-2010, Alexey Borzov <avb@php.net>,
* Bertrand Mansion <golgote@mamasam.com>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * The names of the authors may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* @category HTML
* @package HTML_QuickForm2
* @author Alexey Borzov <avb@php.net>
* @author Bertrand Mansion <golgote@mamasam.com>
* @license http://opensource.org/licenses/bsd-license.php New BSD License
* @version SVN: $Id: Loader.php 294057 2010-01-26 21:10:28Z avb $
* @link http://pear.php.net/package/HTML_QuickForm2
*/
/**
* Exception classes for HTML_QuickForm2
*/
// require_once 'HTML/QuickForm2/Exception.php';
/**
* Class with static methods for loading classes and files
*
* @category HTML
* @package HTML_QuickForm2
* @author Alexey Borzov <avb@php.net>
* @author Bertrand Mansion <golgote@mamasam.com>
* @version Release: @package_version@
*/
class HTML_QuickForm2_Loader
{
/**
* Tries to load a given class
*
* If no $includeFile was provided, $className will be used with underscores
* replaced with path separators and '.php' extension appended
*
* @param string Class name to load
* @param string Name of the file (supposedly) containing the given class
* @throws HTML_QuickForm2_NotFoundException If the file either can't be
* loaded or doesn't contain the given class
*/
public static function loadClass($className, $includeFile = null)
{
if (class_exists($className, false) || interface_exists($className, false)) {
return true;
}
if (empty($includeFile)) {
$includeFile = str_replace('_', DIRECTORY_SEPARATOR, $className) . '.php';
}
// Do not silence the errors with @, parse errors will not be seen
include $includeFile;
// Still no class?
if (!class_exists($className, false) && !interface_exists($className, false)) {
if (!self::fileExists($includeFile)) {
throw new HTML_QuickForm2_NotFoundException(
"File '$includeFile' was not found"
);
} else {
throw new HTML_QuickForm2_NotFoundException(
"Class '$className' was not found within file '$includeFile'"
);
}
}
}
/**
* Checks whether the file exists in the include path
*
* @param string file name
* @return bool
*/
public static function fileExists($fileName)
{
$fp = @fopen($fileName, 'r', true);
if (is_resource($fp)) {
fclose($fp);
return true;
}
return false;
}
/**
* Loading of HTML_QuickForm2_* classes suitable for SPL autoload mechanism
*
* This method will only try to load a class if its name starts with
* HTML_QuickForm2. Register with the following:
* <code>
* spl_autoload_register(array('HTML_QuickForm2_Loader', 'autoload'));
* </code>
*
* @param string Class name
* @return bool Whether class loaded successfully
*/
public static function autoload($class)
{
if (0 !== strpos($class, 'HTML_QuickForm2')) {
return false;
}
try {
@self::loadClass($class);
return true;
} catch (Exception $e) {
return false;
}
}
}
?>
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