gnu-social/vendor/symfony/validator/Mapping/TraversalStrategy.php

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2020-08-08 07:42:38 +09:00
<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Validator\Mapping;
/**
* Specifies whether and how a traversable object should be traversed.
*
* If the node traverser traverses a node whose value is an instance of
* {@link \Traversable}, and if that node is either a class node or if
* cascading is enabled, then the node's traversal strategy will be checked.
* Depending on the requested traversal strategy, the node traverser will
* iterate over the object and cascade each object or collection returned by
* the iterator.
*
* The traversal strategy is ignored for arrays. Arrays are always iterated.
*
* @author Bernhard Schussek <bschussek@gmail.com>
*
* @see CascadingStrategy
*/
class TraversalStrategy
{
/**
* Specifies that a node's value should be iterated only if it is an
* instance of {@link \Traversable}.
*/
const IMPLICIT = 1;
/**
* Specifies that a node's value should never be iterated.
*/
const NONE = 2;
/**
* Specifies that a node's value should always be iterated. If the value is
* not an instance of {@link \Traversable}, an exception should be thrown.
*/
const TRAVERSE = 4;
/**
* Specifies that nested instances of {@link \Traversable} should never be
* iterated. Can be combined with {@link IMPLICIT} or {@link TRAVERSE}.
*
* @deprecated since version 2.5, to be removed in 3.0. This constant was added for backwards compatibility only.
*
* @internal
*/
const STOP_RECURSION = 8;
/**
* Not instantiable.
*/
private function __construct()
{
}
}