how to use doctrine annotations

annotation.php

<?php

//http://jwage.com/2010/08/02/doctrine-annotations-library/
//http://www.doctrine-project.org/projects/common/2.0/docs/reference/annotations/en

namespace Orient;

require_once 'lib/Doctrine/Common/ClassLoader.php';

use Doctrine\Common\ClassLoader;
use Doctrine\Common\Annotations\AnnotationReader;

$loader = new ClassLoader('Doctrine\Common', 'lib');
$loader->register();


$reader = new  AnnotationReader();

class Annotation extends \Doctrine\Common\Annotations\Annotation
{
    public $cluster;
    
    /**
     * Orient attribute attributes
     */
    public $name;
    public $type;
    public $linkedType;
    public $linkedClass;
    public $mandatory;
    public $notNull;
    public $min;
    public $max;
    public $indexed;
}


/**
 * @Orient\Annotation(cluster="documents")
 */
class Popo
{
  /**
   * @Orient\Annotation(type="linkset")
   */
  protected $linkset;
  
  
  protected $relations;
}



$reflClass = new \ReflectionClass('Orient\Popo');

$classAnnotations = $reader->getClassAnnotations($reflClass);
echo $classAnnotations['Orient\Annotation']->cluster . "\n" ;


$props = $reflClass->getProperties();
foreach ($props as $prop) {
  
  $field1Prop = $reflClass->getProperty($prop->getName());
  $propAnnots = $reader->getPropertyAnnotations($field1Prop);
  
  if(array_key_exists('Orient\Annotation', $propAnnots))
  {
    echo $propAnnots['Orient\Annotation']->type . "\n" ;  
  }

}