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/*
* This file is part of the Assetic package, an OpenSky project.
*
* (c) 2010-2014 OpenSky Project Inc
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Assetic\Asset;
/**
* An asset collection.
*
* @author Kris Wallsmith <kris.wallsmith@gmail.com>
*/
interface AssetCollectionInterface extends AssetInterface, \Traversable
{
/**
* Returns all child assets.
*
* @return array An array of AssetInterface objects
*/
public function all();
/**
* Adds an asset to the current collection.
*
* @param AssetInterface $asset An asset
*/
public function add(AssetInterface $asset);
/**
* Removes a leaf.
*
* @param AssetInterface $leaf The leaf to remove
* @param Boolean $graceful Whether the failure should return false or throw an exception
*
* @return Boolean Whether the asset has been found
*
* @throws \InvalidArgumentException If the asset cannot be found
*/
public function removeLeaf(AssetInterface $leaf, $graceful = false);
/**
* Replaces an existing leaf with a new one.
*
* @param AssetInterface $needle The current asset to replace
* @param AssetInterface $replacement The new asset
* @param Boolean $graceful Whether the failure should return false or throw an exception
*
* @return Boolean Whether the asset has been found
*
* @throws \InvalidArgumentException If the asset cannot be found
*/
public function replaceLeaf(AssetInterface $needle, AssetInterface $replacement, $graceful = false);
}
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