Demonstration of Doctrine Annotation Reader

annotations.php

<?php
/**
 *@Annotation
 */
class AnnotatedDescription
{
    public $value;
    public $type;
    public $desc;
}

composer.json

{
    "require":
    {
        "doctrine/common": "*"
    }
}

parse_annotations.php

<?php
// Composer autoloader - used for autoloading doctrine components
require_once 'vendor/autoload.php';
// Contains blueprints of the different annotations types as classes
require_once 'annotations.php';


//The example class to demonstrate annotations

/**
 * @AnnotatedDescription("The class demonstrates the use of annotations")
 */
class AnnotationDemo
{
    /**
     * @AnnotatedDescription("The property is made private for a subtle reason")
     */
    private $property = "I am a private property!";

    /**
     * @AnnotatedDescription(desc ="The property is made private for a subtle reason", type="getter")
     */
    public function  getProperty()
    {
        return $this->getProperty();
    }
}


// Lets parse the annotations

use Doctrine\Common\Annotations\AnnotationReader;

$annotationReader = new AnnotationReader();

//Get class annotation
$reflectionClass = new ReflectionClass('AnnotationDemo');
$classAnnotations = $annotationReader->getClassAnnotations($reflectionClass);

echo "========= CLASS ANNOTATIONS =========" . PHP_EOL;
var_dump($classAnnotations);

// You can also pass ReflectionObject to the same method to read annotations in runtime
$annotationDemoObject = new AnnotationDemo();
$reflectionObject = new ReflectionObject($annotationDemoObject);

$objectAnnotations = $annotationReader->getClassAnnotations($reflectionObject);

echo "========= OBJECT ANNOTATIONS =========" . PHP_EOL;
var_dump($objectAnnotations);


//Property Annotations
$reflectionProperty = new ReflectionProperty('AnnotationDemo', 'property');
$propertyAnnotations = $annotationReader->getPropertyAnnotations($reflectionProperty);

echo "=========   PROPERTY ANNOTATIONS =========" . PHP_EOL;
var_dump($propertyAnnotations);


// Method Annotations
$reflectionMethod = new ReflectionMethod('AnnotationDemo', 'getProperty');
$methodAnnotations = $annotationReader->getMethodAnnotations($reflectionMethod);


echo "=========   Method ANNOTATIONS =========" . PHP_EOL;
var_dump($propertyAnnotations);

last line should be
var_dump($methodAnnotations);

This is how to get single property annotation

$annotationReader = new AnnotationReader();
$reflectionProperty = new ReflectionProperty('AnnotationDemo', 'property');
$propertyAnnotation = $annotationReader->getPropertyAnnotation($reflectionProperty, 'Doctrine\ORM\Mapping\Column');

echo "=========   PROPERTY ANNOTATION =========" . PHP_EOL;
var_dump($propertyAnnotation);

Created a wrapper (for singletons)

<?php

use Doctrine\Common\Annotations\SimpleAnnotationReader as DocReader;

/**
 * Helper AnnotationReader
 */
class AnnotationReader
{

    /**
     * @param $class
     * @return null|\StdClass
     */
    public static function getClass($class)
    {
        $reader = new DocReader;
        $reflector = new \ReflectionClass($class);
        return $reader->getClassAnnotations($reflector);
    }

    /**
     * @param $class
     * @param $property
     * @return array
     */
    public static function getProperty($class, $property)
    {
        $reader = new DocReader;
        $reflector = new \ReflectionProperty($class, $property);
        return $reader->getPropertyAnnotations($reflector);
    }

    /**
     * @param $class
     * @param $method
     * @return array
     */
    public static function getMethod($class, $method)
    {
        $reader = new DocReader;
        $reflector = new \ReflectionMethod($class, $method);
        return $reader->getMethodAnnotations($reflector);
    }

}

Where shall we store the annotation objects?
In a container? That can be injected in ... EntityMangager(s) or Repositories?