File Source for Visitor.php

<?php
/**
* MediaSearch
*
* LICENSE
*
* "THE BEER-WARE LICENSE" (Revision 42):
* "Sven Strittmatter" <ausserirdisch@sven-space.de> wrote this file.
* As long as you retain this notice you can do whatever you want with
* this stuff. If we meet some day, and you think this stuff is worth it,
* you can buy me a beer in return.
*
* $Author$
* $Revision$
*
* @category MediaSearch
* @package MediaSearch_File
* @copyright Copyright (c) 2009 Sven Strittmatter
*/
/**
* @see MediaSearch_Interface_Visitor
*/
require_once('MediaSearch/Interface/Visitor.php');
/**
* @see MediaSearch_Scan_List
*/
require_once('MediaSearch/Scan/List.php');
/**
* @see MediaSearch_Scan_FileMeta
*/
require_once('MediaSearch/Scan/FileMeta.php');
/**
* Visits a file tree (an object of type MediaSearch_File_Abstract)
* and colletcts informations into the MediaSearch_Scan_List object.
*
* This class is part of a visitor pattern implementation (see GoF).
*
* @category MediaSearch
* @package MediaSearch_File
* @copyright Copyright (c) 2009 Sven Strittmatter
*/
class MediaSearch_File_Visitor implements MediaSearch_Interface_Visitor {
const TRACE_LELVEL = 27;
/**
* Holds the information collected by this visitor
* from a file tree.
*
* @access priate
* @var MediaSearch_Scan_List
*/
private $fileList;
/**
* Generates the MediaSearch_Scan_List object we use to hold
* the collected informations from the file tree.
*
* @access public
*/
public function __construct() {
$this->fileList = new MediaSearch_Scan_List();
}
/**
* This method is called from the visited subjects to join the visiting.
*
* @access public
* @param MediaSearch_Interface_Visitable $visitingSubject
*/
public function visit(MediaSearch_Interface_Visitable $visitingSubject) {
if (!$visitingSubject instanceof MediaSearch_File_Abstract) {
$message = 'This visitor can only visits objects of type File_Abstract';
throw new InvalidArgumentException($messgae);
}
$visitingSubject->acceptVisitor($this);
}
/**
* Adds a MediaSearch_Scan_FileMeta object to the scanned files list object.
* This is performed by the vissited subject while visiting it.
*
* @access public
* @param SplFileInfo $fileInfo
* @param int $type
*/
public function addScannedFile(SplFileInfo $fileInfo, $type) {
$this->fileList->add(new MediaSearch_Scan_FileMeta($fileInfo, $type));
}
/**
* Returns the scanned file list object with all
* collected data.
*
* @access public
* @return MediaSearch_Scan_List
*/
public function getFileList() {
return $this->fileList;
}
}

Source for file Visitor.php