ParserRegistry.php

<?php
 
namespace Guzzle\Parser;
 
class ParserRegistry
{
    protected static $instance;
 
    protected $instances = array();
 
    protected $mapping = array(
        'message'      => 'Guzzle\\Parser\\Message\\MessageParser',
        'cookie'       => 'Guzzle\\Parser\\Cookie\\CookieParser',
        'url'          => 'Guzzle\\Parser\\Url\\UrlParser',
        'uri_template' => 'Guzzle\\Parser\\UriTemplate\\UriTemplate',
    );
 
    public static function getInstance()
    {
        if (!self::$instance) {
            self::$instance = new static;
        }
 
        return self::$instance;
    }
 
    public function __construct()
    {
        // Use the PECL URI template parser if available
        if (extension_loaded('uri_template')) {
            $this->mapping['uri_template'] = 'Guzzle\\Parser\\UriTemplate\\PeclUriTemplate';
        }
    }
 
    public function getParser($name)
    {
        if (!isset($this->instances[$name])) {
            if (!isset($this->mapping[$name])) {
                return null;
            }
            $class = $this->mapping[$name];
            $this->instances[$name] = new $class();
        }
 
        return $this->instances[$name];
    }
 
    public function registerParser($name, $parser)
    {
        $this->instances[$name] = $parser;
    }
}