<?php

/*

 * This file is part of the Symfony package.

 *

 * (c) Fabien Potencier <fabien@symfony.com>

 *

 * For the full copyright and license information, please view the LICENSE

 * file that was distributed with this source code.

 */

namespace Symfony\Component\Validator;

use Symfony\Component\Validator\Mapping\ElementMetadata;

use Symfony\Component\Validator\Mapping\ClassMetadata;

use Symfony\Component\Validator\Mapping\ClassMetadataFactoryInterface;

/**

 * The default implementation of the ValidatorInterface.

 *

 * This service can be used to validate objects, properties and raw values

 * against constraints.

 *

 * @author Fabien Potencier <fabien@symfony.com>

 * @author Bernhard Schussek <bernhard.schussek@symfony.com>

 *

 * @api

 */

class Validator implements ValidatorInterface

{

    protected $metadataFactory;

    protected $validatorFactory;

    protected $validatorInitializers;

    public function __construct(

        ClassMetadataFactoryInterface $metadataFactory,

        ConstraintValidatorFactoryInterface $validatorFactory,

        array $validatorInitializers = array()

    )

    {

        $this->metadataFactory = $metadataFactory;

        $this->validatorFactory = $validatorFactory;

        $this->validatorInitializers = $validatorInitializers;

    }

    /**

     * {@inheritDoc}

     */

    public function getMetadataFactory()

    {

        return $this->metadataFactory;

    }

    /**

     * {@inheritDoc}

     *

     * @api

     */

    public function validate($object, $groups = null)

    {

        $metadata = $this->metadataFactory->getClassMetadata(get_class($object));

        $walk = function(GraphWalker $walker, $group) use ($metadata, $object) {

            return $walker->walkObject($metadata, $object, $group, '');

        };

        return $this->validateGraph($object, $walk, $groups);

    }

    /**

     * {@inheritDoc}

     *

     * @api

     */

    public function validateProperty($object, $property, $groups = null)

    {

        $metadata = $this->metadataFactory->getClassMetadata(get_class($object));

        $walk = function(GraphWalker $walker, $group) use ($metadata, $property, $object) {

            return $walker->walkProperty($metadata, $property, $object, $group, '');

        };

        return $this->validateGraph($object, $walk, $groups);

    }

    /**

     * {@inheritDoc}

     *

     * @api

     */

    public function validatePropertyValue($class, $property, $value, $groups = null)

    {

        $metadata = $this->metadataFactory->getClassMetadata($class);

        $walk = function(GraphWalker $walker, $group) use ($metadata, $property, $value) {

            return $walker->walkPropertyValue($metadata, $property, $value, $group, '');

        };

        return $this->validateGraph($class, $walk, $groups);

    }

    /**

     * {@inheritDoc}

     *

     * @api

     */

    public function validateValue($value, Constraint $constraint, $groups = null)

    {

        $walk = function(GraphWalker $walker, $group) use ($constraint, $value) {

            return $walker->walkConstraint($constraint, $value, $group, '');

        };

        return $this->validateGraph($value, $walk, $groups);

    }

    protected function validateGraph($root, \Closure $walk, $groups = null)

    {

        $walker = new GraphWalker($root, $this->metadataFactory, $this->validatorFactory, $this->validatorInitializers);

        $groups = $groups ? (array) $groups : array(Constraint::DEFAULT_GROUP);

        foreach ($groups as $group) {

            $walk($walker, $group);

        }

        return $walker->getViolations();

    }

}