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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
*/
namespace PhpMyAdmin\Navigation;
use PhpMyAdmin\Navigation\Nodes\Node;
/**
* Node factory - instantiates Node objects or objects derived from the Node class
*
* @package PhpMyAdmin-Navigation
*/
class NodeFactory
{
protected static $_namespace = 'PhpMyAdmin\\Navigation\\Nodes\\%s';
/**
* Sanitizes the name of a Node class
*
* @param string $class The class name to be sanitized
*
* @return string
*/
private static function _sanitizeClass($class)
{
if (!preg_match('@^Node\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"'),
$class
),
E_USER_ERROR
);
}
return self::_checkClass($class);
}
/**
* Checks if a class exists and try to load it.
* Will return the default class name back if the
* file for some subclass is not available
*
* @param string $class The class name to check
*
* @return string
*/
private static function _checkClass($class)
{
$class = sprintf(self::$_namespace, $class);
if (! class_exists($class)) {
$class = sprintf(self::$_namespace, 'Node');
trigger_error(
sprintf(
__('Could not load class "%1$s"'),
$class
),
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);
return new $class($name, $type, $is_group);
}
}