<?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\Validator;

use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintViolationListInterface;

/**
 * A validator in a specific execution context.
 *
 * @since  2.5
 * @author Bernhard Schussek <bschussek@gmail.com>
 */
interface ContextualValidatorInterface
{
    /**
     * Appends the given path to the property path of the context.
     *
     * If called multiple times, the path will always be reset to the context's
     * original path with the given path appended to it.
     *
     * @param string $path The path to append
     *
     * @return ContextualValidatorInterface This validator
     */
    public function atPath($path);

    /**
     * Validates a value against a constraint or a list of constraints.
     *
     * If no constraint is passed, the constraint
     * {@link \Symfony\Component\Validator\Constraints\Valid} is assumed.
     *
     * @param mixed                   $value       The value to validate
     * @param Constraint|Constraint[] $constraints The constraint(s) to validate
     *                                             against
     * @param array|null              $groups      The validation groups to
     *                                             validate. If none is given,
     *                                             "Default" is assumed
     *
     * @return ContextualValidatorInterface This validator
     */
    public function validate($value, $constraints = null, $groups = null);

    /**
     * Validates a property of an object against the constraints specified
     * for this property.
     *
     * @param object     $object       The object
     * @param string     $propertyName The name of the validated property
     * @param array|null $groups       The validation groups to validate. If
     *                                 none is given, "Default" is assumed
     *
     * @return ContextualValidatorInterface This validator
     */
    public function validateProperty($object, $propertyName, $groups = null);

    /**
     * Validates a value against the constraints specified for an object's
     * property.
     *
     * @param object|string $objectOrClass The object or its class name
     * @param string        $propertyName  The name of the property
     * @param mixed         $value         The value to validate against the
     *                                     property's constraints
     * @param array|null    $groups        The validation groups to validate. If
     *                                     none is given, "Default" is assumed
     *
     * @return ContextualValidatorInterface This validator
     */
    public function validatePropertyValue($objectOrClass, $propertyName, $value, $groups = null);

    /**
     * Returns the violations that have been generated so far in the context
     * of the validator.
     *
     * @return ConstraintViolationListInterface The constraint violations
     */
    public function getViolations();
}
