Annotations
-----------

@Inject
~~~~~~~~~
This marks a property, or parameter for injection:

.. code-block :: php

    <?php

    use JMS\DiExtraBundle\Annotation\Inject;

    class Controller
    {
        /**
         * @Inject("security.context", required = false)
         */
        private $securityContext;
        
        /**
         * @Inject("%kernel.cache_dir%")
         */
        private $cacheDir;
        
        /**
         * @Inject
         */
        private $session;
    }

.. tip :: 

    If you do not specify the service explicitly, we will try to guess it based on the name
    of the property or the parameter.

@InjectParams
~~~~~~~~~~~~~~~
This marks the parameters of a method for injection:

.. code-block :: php

    <?php

    use JMS\DiExtraBundle\Annotation\Inject;
    use JMS\DiExtraBundle\Annotation\InjectParams;
    use JMS\DiExtraBundle\Annotation\Service;

    /**
     * @Service
     */
    class Listener
    {
        /**
         * @InjectParams({
         *     "em" = @Inject("doctrine.entity_manager")
         * })
         */
        public function __construct(EntityManager $em, Session $session)
        {
            // ...
        }
    }
    
If you don't define all parameters in the param map, we will try to guess which services
should be injected into the remaining parameters based on their name.

@Service
~~~~~~~~
Marks a class as service:

.. code-block :: php

    <?php

    use JMS\DiExtraBundle\Annotation\Service;

    /**
     * @Service("some.service.id", parent="another.service.id", public=false)
     */
    class Listener
    {
    }

If you do not explicitly define a service id, then we will generated a sensible default
based on the fully qualified class name for you.

@Tag
~~~~
Adds a tag to the service:

.. code-block :: php

    <?php

    use JMS\DiExtraBundle\Annotation\Service;
    use JMS\DiExtraBundle\Annotation\Tag;

    /**
     * @Service
     * @Tag("doctrine.event_listener", attributes = {"event" = "postGenerateSchema", lazy=true})
     */
    class Listener
    {
        // ...
    }

@Observe
~~~~~~~~
Automatically registers a method as listener to a certain event:

.. code-block :: php

    <?php

    use JMS\DiExtraBundle\Annotation\Observe;
    use JMS\DiExtraBundle\Annotation\Service;

    /**
     * @Service
     */
    class RequestListener
    {
        /**
         * @Observe("kernel.request", priority = 255)
         */
        public function onKernelRequest()
        {
            // ...
        }
    }

@Validator
~~~~~~~~~~
Automatically registers the given class as constraint validator for the Validator component:

.. code-block :: php

    <?php

    use JMS\DiExtraBundle\Annotation\Validator;
    use Symfony\Component\Validator\Constraint;
    use Symfony\Component\Validator\ConstraintValidator;
    
    /**
     * @Validator("my_alias")
     */
    class MyValidator extends ConstraintValidator
    {
        // ...
    }
    
    class MyConstraint extends Constraint
    {
        // ...
        public function validatedBy()
        {
            return 'my_alias';
        }
    }

The @Validator annotation also implies the @Service annotation if you do not specify it explicitly.
The alias which is passed to the @Validator annotation must match the string that is returned from
the ``validatedBy`` method of your constraint.

@FormType
~~~~~~~~~
Automatically, registers the given class as a form type with Symfony2's Form Component.

.. code-block :: php

    <?php
    
    use JMS\DiExtraBundle\Annotation\FormType;
    use Symfony\Component\Form\AbstractType;
    
    /**
     * @FormType
     */
    class MyFormType extends AbstractType
    {
        // ...
        
        public function getName()
        {
            return 'my_form';
        }
    }

    // Controller.php
    $form = $this->formFactory->create('my_form');
    
.. note :: 

    ``@FormType`` implies ``@Service`` if not explicitly defined.
    
@DoctrineListener
~~~~~~~~~~~~~~~~~
Automatically, registers the given class as a listener with the Doctrine ORM:

.. code-block :: php

    <?php
    
    use JMS\DiExtraBundle\Annotation\DoctrineListener;
    
    /**
     * @DoctrineListener(
     *     events = {"prePersist", "preUpdate"}, 
     *     connection = "default", 
     *     lazy = true, 
     *     priority = 0,
     * )
    class MyListener
    {
        // ...
    }

.. note ::

    ``@DoctrineListener`` implies ``@Service`` if not explicitly defined.