silverstripe-framework/Assets/Storage/AssetNameGenerator.php

<?php

namespace SilverStripe\Assets\Storage;

/**
 * Provides a mechanism for suggesting filename alterations to a file
 *
 * Does not actually check for existence of the file, but rather comes up with as many suggestions for
 * the given file as possible to a finite limit.
 */
interface AssetNameGenerator extends \Iterator {

	/**
	 * Construct a generator for the given filename
	 *
	 * @param string $filename
	 */
	public function __construct($filename);

	/**
	 * Number of attempts allowed
	 *
	 * @return int
	 */
	public function getMaxTries();
}