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doctrine2/vendor/Sensei/Sensei.php

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2007-06-13 02:18:21 +04:00
<?php
/*
* $Id$
*
* 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.
*
* This software consists of voluntary contributions made by many individuals
* and is licensed under the LGPL. For more information, see
* <http://www.phpdoctrine.com>.
*/
/**
* Sensei
*
* @package Sensei
* @category Core
* @license http://www.gnu.org/licenses/lgpl.txt LGPL
* @link http://sourceforge.net/projects/sensei
* @author Janne Vanhala <jpvanhal@cc.hut.fi>
* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
* @version $Revision$
* @since 1.0
*/
final class Sensei {
/**
* @var string $path doctrine root directory
*/
private static $path;
/**
* getPath
* returns the doctrine root
*
* @return string
*/
public static function getPath()
{
if (! self::$path) {
self::$path = dirname(__FILE__);
}
return self::$path;
}
/**
* simple autoload function
* returns true if the class was loaded, otherwise false
*
* @param string $classname
* @return boolean
*/
public static function autoload($classname)
{
if (class_exists($classname, false)) {
return false;
}
if ( ! self::$path) {
self::$path = dirname(__FILE__);
}
$class = self::$path . DIRECTORY_SEPARATOR . str_replace('_', DIRECTORY_SEPARATOR, $classname) . '.php';
if ( ! file_exists($class)) {
return false;
}
require_once($class);
return true;
}
/**
* Load a given class: a file name is acquired by naively transforming
* underscores into directory separators and appending the .php suffix.
*
* The file is searched for in every directory in the include path.
*
* @param string class name
* @param boolean allow class to be autoloaded before attempt
* @return true
* @throws Xi_Exception if the class could not be loaded
*/
public static function loadClass($className)
{
if (class_exists($className, false)) {
return false;
}
if (! self::$path) {
self::$path = dirname(__FILE__);
}
$class = self::$path . DIRECTORY_SEPARATOR . str_replace('_', DIRECTORY_SEPARATOR, $className) . '.php';
if ( ! file_exists($class)) {
return false;
}
require_once($class);
throw new Sensei_Exception('Class ' . $className . ' does not exist and could not '
. 'be loaded.');
}
/**
* Create a new instance of a class.
*
* @param string class name
* @param array constructor arguments, optional
* @return object
*/
public static function create($class, array $args = array())
{
/**
* An arbitrary amount of constructor arguments can be achieved using
* reflection, but it's slower by an order of magnitude. Manually handle
* instantiation for up to three arguments.
*/
switch (count($args)) {
case 0:
return new $class;
case 1:
return new $class($args[0]);
case 2:
return new $class($args[0], $args[1]);
case 3:
return new $class($args[0], $args[1], $args[2]);
default:
return call_user_func_array(array(new ReflectionClass($class),'newInstance'),
$args);
}
}
}