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<?php
/**
* SimplePie
*
* A PHP-Based RSS and Atom Feed Framework.
* Takes the hard work out of managing a complete RSS/Atom solution.
*
* Copyright (c) 2004-2012, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors
* 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.
*
* * Neither the name of the SimplePie Team nor the names of its contributors may 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 HOLDERS
* AND 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.
*
* @package SimplePie
* @version 1.3.1
* @copyright 2004-2012 Ryan Parman, Geoffrey Sneddon, Ryan McCue
* @author Ryan Parman
* @author Geoffrey Sneddon
* @author Ryan McCue
* @link http://simplepie.org/ SimplePie
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
*/
/**
* Handles creating objects and calling methods
*
* Access this via {@see SimplePie::get_registry()}
*
* @package SimplePie
*/
class SimplePie_Registry
{
/**
* Default class mapping
*
* Overriding classes *must* subclass these.
*
* @var array
*/
protected $default = array(
'Cache' => 'SimplePie_Cache',
'Locator' => 'SimplePie_Locator',
'Parser' => 'SimplePie_Parser',
'File' => 'SimplePie_File',
'Sanitize' => 'SimplePie_Sanitize',
'Item' => 'SimplePie_Item',
'Author' => 'SimplePie_Author',
'Category' => 'SimplePie_Category',
'Enclosure' => 'SimplePie_Enclosure',
'Caption' => 'SimplePie_Caption',
'Copyright' => 'SimplePie_Copyright',
'Credit' => 'SimplePie_Credit',
'Rating' => 'SimplePie_Rating',
'Restriction' => 'SimplePie_Restriction',
'Content_Type_Sniffer' => 'SimplePie_Content_Type_Sniffer',
'Source' => 'SimplePie_Source',
'Misc' => 'SimplePie_Misc',
'XML_Declaration_Parser' => 'SimplePie_XML_Declaration_Parser',
'Parse_Date' => 'SimplePie_Parse_Date',
);
/**
* Class mapping
*
* @see register()
* @var array
*/
protected $classes = array();
/**
* Legacy classes
*
* @see register()
* @var array
*/
protected $legacy = array();
/**
* Constructor
*
* No-op
*/
public function __construct() { }
/**
* Register a class
*
* @param string $type See {@see $default} for names
* @param string $class Class name, must subclass the corresponding default
* @param bool $legacy Whether to enable legacy support for this class
* @return bool Successfulness
*/
public function register($type, $class, $legacy = false)
{
if (!is_subclass_of($class, $this->default[$type]))
{
return false;
}
$this->classes[$type] = $class;
if ($legacy)
{
$this->legacy[] = $class;
}
return true;
}
/**
* Get the class registered for a type
*
* Where possible, use {@see create()} or {@see call()} instead
*
* @param string $type
* @return string|null
*/
public function get_class($type)
{
if (!empty($this->classes[$type]))
{
return $this->classes[$type];
}
if (!empty($this->default[$type]))
{
return $this->default[$type];
}
return null;
}
/**
* Create a new instance of a given type
*
* @param string $type
* @param array $parameters Parameters to pass to the constructor
* @return object Instance of class
*/
public function &create($type, $parameters = array())
{
$class = $this->get_class($type);
if (in_array($class, $this->legacy))
{
switch ($type)
{
case 'locator':
// Legacy: file, timeout, useragent, file_class, max_checked_feeds, content_type_sniffer_class
// Specified: file, timeout, useragent, max_checked_feeds
$replacement = array($this->get_class('file'), $parameters[3], $this->get_class('content_type_sniffer'));
array_splice($parameters, 3, 1, $replacement);
break;
}
}
if (!method_exists($class, '__construct'))
{
$instance = new $class;
}
else
{
$reflector = new ReflectionClass($class);
$instance = $reflector->newInstanceArgs($parameters);
}
if (method_exists($instance, 'set_registry'))
{
$instance->set_registry($this);
}
return $instance;
}
/**
* Call a static method for a type
*
* @param string $type
* @param string $method
* @param array $parameters
* @return mixed
*/
public function &call($type, $method, $parameters = array())
{
$class = $this->get_class($type);
if (in_array($class, $this->legacy))
{
switch ($type)
{
case 'Cache':
// For backwards compatibility with old non-static
// Cache::create() methods
if ($method === 'get_handler')
{
$result = @call_user_func_array(array($class, 'create'), $parameters);
return $result;
}
break;
}
}
$result = call_user_func_array(array($class, $method), $parameters);
return $result;
}
}