CountValidator.php

<?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\Constraints;

use Symfony\Component\Validator\Constraint;
use Symfony\Component\Validator\ConstraintValidator;
use Symfony\Component\Validator\Exception\UnexpectedTypeException;

/**
 * @author Bernhard Schussek <bschussek@gmail.com>
 */
class CountValidator extends ConstraintValidator {

  /**
   * {@inheritDoc}
   */
  public function validate($value, Constraint $constraint) {
    if (null === $value) {
      return;
    }
    if (!is_array($value) && !$value instanceof \Countable) {
      throw new UnexpectedTypeException($value, 'array or \\Countable');
    }
    $count = count($value);
    if ($constraint->min == $constraint->max && $count != $constraint->min) {
      $this->context
        ->addViolation($constraint->exactMessage, array(
        '{{ count }}' => $count,
        '{{ limit }}' => $constraint->min,
      ), $value, (int) $constraint->min);
      return;
    }
    if (null !== $constraint->max && $count > $constraint->max) {
      $this->context
        ->addViolation($constraint->maxMessage, array(
        '{{ count }}' => $count,
        '{{ limit }}' => $constraint->max,
      ), $value, (int) $constraint->max);
      return;
    }
    if (null !== $constraint->min && $count < $constraint->min) {
      $this->context
        ->addViolation($constraint->minMessage, array(
        '{{ count }}' => $count,
        '{{ limit }}' => $constraint->min,
      ), $value, (int) $constraint->min);
    }
  }

}