--- /dev/null
+<?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\Exception\ConstraintDefinitionException;
+
+/**
+ * Used for the comparison of values.
+ *
+ * @author Daniel Holmes <daniel@danielholmes.org>
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ */
+abstract class AbstractComparison extends Constraint
+{
+ public $message;
+ public $value;
+
+ /**
+ * {@inheritdoc}
+ */
+ public function __construct($options = null)
+ {
+ if (is_array($options) && !isset($options['value'])) {
+ throw new ConstraintDefinitionException(sprintf(
+ 'The %s constraint requires the "value" option to be set.',
+ get_class($this)
+ ));
+ }
+
+ parent::__construct($options);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getDefaultOption()
+ {
+ return 'value';
+ }
+}