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* This file is part of the Assetic package, an OpenSky project.
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* (c) 2010-2013 OpenSky Project Inc
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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namespace Assetic\Asset\Iterator;
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* Asset collection filter iterator.
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* The filter iterator is responsible for de-duplication of leaf assets based
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* on both strict equality and source URL.
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* @author Kris Wallsmith <kris.wallsmith@gmail.com>
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class AssetCollectionFilterIterator extends \RecursiveFilterIterator
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* @param AssetCollectionIterator $iterator The inner iterator
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* @param array $visited An array of visited asset objects
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* @param array $sources An array of visited source strings
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public function __construct(AssetCollectionIterator $iterator, array $visited = array(), array $sources = array())
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parent::__construct($iterator);
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$this->visited = $visited;
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$this->sources = $sources;
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* Determines whether the current asset is a duplicate.
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* De-duplication is performed based on either strict equality or by
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* @return Boolean Returns true if we have not seen this asset yet
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public function accept()
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$asset = $this->getInnerIterator()->current(true);
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// check strict equality
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if (in_array($asset, $this->visited, true)) {
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$this->visited[] = $asset;
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$sourceRoot = $asset->getSourceRoot();
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$sourcePath = $asset->getSourcePath();
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if ($sourceRoot && $sourcePath) {
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$source = $sourceRoot.'/'.$sourcePath;
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if (in_array($source, $this->sources)) {
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$this->sources[] = $source;
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* Passes visited objects and source URLs to the child iterator.
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public function getChildren()
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return new self($this->getInnerIterator()->getChildren(), $this->visited, $this->sources);
added
removed
src/Assetic/Asset/Iterator/AssetCollectionFilterIterator.php
