CaffGeek/MBACNationals

<?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;
    }
}