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<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* This class is responsible for creating Node objects
*
* @package PhpMyAdmin-navigation
*/
if (! defined('PHPMYADMIN')) {
exit;
}
require_once 'libraries/navigation/Nodes/Node.class.php';
/**
* Node factory - instantiates Node objects or objects derived from the Node class
*
* @package PhpMyAdmin-Navigation
*/
class PMA_NodeFactory
{
/**
* @var string $_path A template for generating paths to files
* that contain various Node classes
* @access private
*/
private static $_path = 'libraries/navigation/Nodes/%s.class.php';
/**
* Sanitizes the name of a Node class
*
* @param string $class The class name to be sanitized
*
* @return string
*/
private static function _sanitizeClass($class)
{
if ($class !== 'Node' && ! preg_match('@^Node_\w+(_\w+)?$@', $class)) {
$class = 'Node';
trigger_error(
sprintf(
/* l10n: The word "Node" must not be translated here */
__('Invalid class name "%1$s", using default of "Node"'),
$class
),
E_USER_ERROR
);
}
return self::_checkFile($class);
}
/**
* Checks if a file exists for a given class name
* Will return the default class name back if the
* file for some subclass is not available
*
* @param string $class The class name to check
*
* @return string
*/
private static function _checkFile($class)
{
$path = sprintf(self::$_path, $class);
if (! is_readable($path)) {
$class = 'Node';
trigger_error(
sprintf(
__('Could not include class "%1$s", file "%2$s" not found'),
$class,
'Nodes/' . $class . '.class.php'
),
E_USER_ERROR
);
}
return $class;
}
/**
* Instantiates a Node object
*
* @param string $class The name of the class to instantiate
* @param string $name An identifier for the new node
* @param int $type Type of node, may be one of CONTAINER or OBJECT
* @param bool $is_group Whether this object has been created
* while grouping nodes
*
* @return mixed
*/
public static function getInstance(
$class = 'Node',
$name = 'default',
$type = Node::OBJECT,
$is_group = false
) {
$class = self::_sanitizeClass($class);
include_once sprintf(self::$_path, $class);
return new $class($name, $type, $is_group);
}
}