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<?php
/**
* Part of the Joomla Framework Registry Package
*
* @copyright Copyright (C) 2005 - 2013 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE
*/
namespace Joomla\Registry;
/**
* Abstract Format for Registry
*
* @since 1.0
*/
abstract class AbstractRegistryFormat
{
/**
* @var array Format instances container.
* @since 1.0
*/
protected static $instances = array();
/**
* Returns a reference to a Format object, only creating it
* if it doesn't already exist.
*
* @param string $type The format to load
*
* @return AbstractRegistryFormat Registry format handler
*
* @since 1.0
* @throws \InvalidArgumentException
*/
public static function getInstance($type)
{
// Sanitize format type.
$type = strtolower(preg_replace('/[^A-Z0-9_]/i', '', $type));
// Only instantiate the object if it doesn't already exist.
if (!isset(self::$instances[$type]))
{
$class = '\\Joomla\\Registry\\Format\\' . ucfirst($type);
if (!class_exists($class))
{
throw new \InvalidArgumentException('Unable to load format class.', 500);
}
self::$instances[$type] = new $class;
}
return self::$instances[$type];
}
/**
* Converts an object into a formatted string.
*
* @param object $object Data Source Object.
* @param array $options An array of options for the formatter.
*
* @return string Formatted string.
*
* @since 1.0
*/
abstract public function objectToString($object, $options = null);
/**
* Converts a formatted string into an object.
*
* @param string $data Formatted string
* @param array $options An array of options for the formatter.
*
* @return object Data Object
*
* @since 1.0
*/
abstract public function stringToObject($data, array $options = array());
}