Loader.php

<?php
class Dsao_Xml_Loader
{
  protected $_xmlObjects = array();

  protected $_fileNames = array();

  protected $_path = null;

  public function __construct($path = null, array $fileNames = array())
  {
    $this->_path = $path;
    $this->_fileNames = $fileNames;
  }

  protected function _load()
  {
    // Daten zurück setzen
    $this->_xmlObjects = array();

    // Falls Verzeichnis nicht vorhanden oder nicht lesbar
    if (!is_dir($this->_path) || !is_readable($this->_path))
    {
      throw new Dsao_Exception(array(
        'message' => 'dsao_xml_loader_path',
        'variables' => array('path' => $this->_path)));
    }

    $fileNames = $this->_fileNames;

    // Falls keine Dateinamen übergeben wurden
    if (!$fileNames)
    {
      $directory = new DirectoryIterator($this->_path);

      // Verzeichnis durchgehen und XML-Dateien heraussuchen
      while ($directory->valid())
      {
        // Falls Datei
        if ($directory->isFile())
        {
          $fileNameParts = explode('.', $directory->getFileName(), 2);

          // Falls Dateiendung vorhanden und 'xml'
          if (isset($fileNameParts[1]) && $fileNameParts[1] == 'xml')
          {
            $fileNames[] = $fileNameParts[0];
          }
        }

        $directory->next();
      }
    }

    // Dateien durchgehen und laden
    foreach ($fileNames as $fileName)
    {
      $fileNameAbsolute = $this->_path.$fileName.'.xml';

      // Falls Datei vorhanden
      if (file_exists($fileNameAbsolute))
      {
        $this->_xmlObjects[$fileName] = simplexml_load_file($fileNameAbsolute);
      }
    }
  }

  public function addFileName($fileName)
  {
    $this->_fieNames[] = $fileName;

    return $this;
  }

  public function getFileNames()
  {
    return $this->_fileNames;
  }

  public function getPath()
  {
    return $this->_path;
  }

  public function getXmlObjects($forceReload = false)
  {
    // Falls Daten leer oder neu geparst werden muss
    if (!$this->_xmlObjects || $forceReload)
    {
      $this->_load();
    }

    return $this->_xmlObjects;
  }

  public function setFileNames(array $fileNames)
  {
    $this->_fileNames = $fileNames;

    $this->_xmlObjects = array();

    return $this;
  }

  public function setPath($path)
  {
    $this->_path = (string) $path;

    // Daten zurück setzen
    $this->_xmlObjects = array();

    return $this;
  }
}