diff --git a/src/Symfony/Component/Validator/Constraints/AllValidator.php b/src/Symfony/Component/Validator/Constraints/AllValidator.php
index d45417ff48..cb952f93a7 100644
--- a/src/Symfony/Component/Validator/Constraints/AllValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/AllValidator.php
@@ -41,10 +41,11 @@ class AllValidator extends ConstraintValidator
 
         $context = $this->context;
         $group = $context->getGroup();
+        $validator = $context->getValidator()->inContext($context);
 
         foreach ($value as $key => $element) {
             foreach ($constraint->constraints as $constr) {
-                $context->validateValue($element, $constr, '['.$key.']', $group);
+                $validator->atPath('['.$key.']')->validate($element, $constr, $group);
             }
         }
     }
diff --git a/src/Symfony/Component/Validator/Constraints/ChoiceValidator.php b/src/Symfony/Component/Validator/Constraints/ChoiceValidator.php
index f0bb884a2f..4bfe206209 100644
--- a/src/Symfony/Component/Validator/Constraints/ChoiceValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/ChoiceValidator.php
@@ -63,25 +63,35 @@ class ChoiceValidator extends ConstraintValidator
         if ($constraint->multiple) {
             foreach ($value as $_value) {
                 if (!in_array($_value, $choices, $constraint->strict)) {
-                    $this->context->addViolation($constraint->multipleMessage, array('{{ value }}' => $_value));
+                    $this->context->buildViolation($constraint->multipleMessage)
+                        ->setParameter('{{ value }}', $_value)
+                        ->addViolation();
                 }
             }
 
             $count = count($value);
 
             if ($constraint->min !== null && $count < $constraint->min) {
-                $this->context->addViolation($constraint->minMessage, array('{{ limit }}' => $constraint->min), null, (int) $constraint->min);
+                $this->context->buildViolation($constraint->minMessage)
+                    ->setParameter('{{ limit }}', $constraint->min)
+                    ->setPlural((int) $constraint->min)
+                    ->addViolation();
 
                 return;
             }
 
             if ($constraint->max !== null && $count > $constraint->max) {
-                $this->context->addViolation($constraint->maxMessage, array('{{ limit }}' => $constraint->max), null, (int) $constraint->max);
+                $this->context->buildViolation($constraint->maxMessage)
+                    ->setParameter('{{ limit }}', $constraint->max)
+                    ->setPlural((int) $constraint->max)
+                    ->addViolation();
 
                 return;
             }
         } elseif (!in_array($value, $choices, $constraint->strict)) {
-            $this->context->addViolation($constraint->message, array('{{ value }}' => $value));
+            $this->context->buildViolation($constraint->message)
+                ->setParameter('{{ value }}', $value)
+                ->addViolation();
         }
     }
 }
diff --git a/src/Symfony/Component/Validator/Constraints/CollectionValidator.php b/src/Symfony/Component/Validator/Constraints/CollectionValidator.php
index 56a6cbca23..bf8e6d0b91 100644
--- a/src/Symfony/Component/Validator/Constraints/CollectionValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/CollectionValidator.php
@@ -50,6 +50,7 @@ class CollectionValidator extends ConstraintValidator
         // to validate() instead.
         $context = $this->context;
         $group = $context->getGroup();
+        $validator = $context->getValidator()->inContext($context);
 
         foreach ($constraint->fields as $field => $fieldConstraint) {
             if (
@@ -58,21 +59,23 @@ class CollectionValidator extends ConstraintValidator
                 ($value instanceof \ArrayAccess && $value->offsetExists($field))
             ) {
                 foreach ($fieldConstraint->constraints as $constr) {
-                    $context->validateValue($value[$field], $constr, '['.$field.']', $group);
+                    $validator->atPath('['.$field.']')->validate($value[$field], $constr, $group);
                 }
             } elseif (!$fieldConstraint instanceof Optional && !$constraint->allowMissingFields) {
-                $context->addViolationAt('['.$field.']', $constraint->missingFieldsMessage, array(
-                    '{{ field }}' => $field
-                ), null);
+                $context->buildViolation($constraint->missingFieldsMessage)
+                    ->atPath('['.$field.']')
+                    ->setParameter('{{ field }}', $field)
+                    ->addViolation();
             }
         }
 
         if (!$constraint->allowExtraFields) {
             foreach ($value as $field => $fieldValue) {
                 if (!isset($constraint->fields[$field])) {
-                    $context->addViolationAt('['.$field.']', $constraint->extraFieldsMessage, array(
-                        '{{ field }}' => $field
-                    ), $fieldValue);
+                    $context->buildViolation($constraint->extraFieldsMessage)
+                        ->atPath('['.$field.']')
+                        ->setParameter('{{ field }}', $field)
+                        ->addViolation();
                 }
             }
         }
diff --git a/src/Symfony/Component/Validator/Constraints/CountValidator.php b/src/Symfony/Component/Validator/Constraints/CountValidator.php
index d7d5025b1c..160ba7ac0b 100644
--- a/src/Symfony/Component/Validator/Constraints/CountValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/CountValidator.php
@@ -36,28 +36,34 @@ class CountValidator extends ConstraintValidator
         $count = count($value);
 
         if ($constraint->min == $constraint->max && $count != $constraint->min) {
-            $this->context->addViolation($constraint->exactMessage, array(
-                '{{ count }}' => $count,
-                '{{ limit }}' => $constraint->min,
-            ), $value, (int) $constraint->min);
+            $this->context->buildViolation($constraint->exactMessage)
+                ->setParameter('{{ count }}', $count)
+                ->setParameter('{{ limit }}', $constraint->min)
+                ->setValue($value)
+                ->setPlural((int) $constraint->min)
+                ->addViolation();
 
             return;
         }
 
         if (null !== $constraint->max && $count > $constraint->max) {
-            $this->context->addViolation($constraint->maxMessage, array(
-                '{{ count }}' => $count,
-                '{{ limit }}' => $constraint->max,
-            ), $value, (int) $constraint->max);
+            $this->context->buildViolation($constraint->maxMessage)
+                ->setParameter('{{ count }}', $count)
+                ->setParameter('{{ limit }}', $constraint->max)
+                ->setValue($value)
+                ->setPlural((int) $constraint->max)
+                ->addViolation();
 
             return;
         }
 
         if (null !== $constraint->min && $count < $constraint->min) {
-            $this->context->addViolation($constraint->minMessage, array(
-                '{{ count }}' => $count,
-                '{{ limit }}' => $constraint->min,
-            ), $value, (int) $constraint->min);
+            $this->context->buildViolation($constraint->minMessage)
+                ->setParameter('{{ count }}', $count)
+                ->setParameter('{{ limit }}', $constraint->min)
+                ->setValue($value)
+                ->setPlural((int) $constraint->min)
+                ->addViolation();
         }
     }
 }
diff --git a/src/Symfony/Component/Validator/Constraints/LegacyAllValidator.php b/src/Symfony/Component/Validator/Constraints/LegacyAllValidator.php
new file mode 100644
index 0000000000..47e037a9b4
--- /dev/null
+++ b/src/Symfony/Component/Validator/Constraints/LegacyAllValidator.php
@@ -0,0 +1,51 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Validator\Constraints;
+
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\ConstraintValidator;
+use Symfony\Component\Validator\Exception\UnexpectedTypeException;
+
+/**
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ *
+ * @deprecated Deprecated since version 2.5.3, to be removed in 3.0.
+ */
+class LegacyAllValidator extends ConstraintValidator
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function validate($value, Constraint $constraint)
+    {
+        if (!$constraint instanceof All) {
+            throw new UnexpectedTypeException($constraint, __NAMESPACE__.'\All');
+        }
+
+        if (null === $value) {
+            return;
+        }
+
+        if (!is_array($value) && !$value instanceof \Traversable) {
+            throw new UnexpectedTypeException($value, 'array or Traversable');
+        }
+
+        $context = $this->context;
+        $group = $context->getGroup();
+
+        foreach ($value as $key => $element) {
+            foreach ($constraint->constraints as $constr) {
+                $context->validateValue($element, $constr, '['.$key.']', $group);
+            }
+        }
+    }
+}
diff --git a/src/Symfony/Component/Validator/Constraints/LegacyChoiceValidator.php b/src/Symfony/Component/Validator/Constraints/LegacyChoiceValidator.php
new file mode 100644
index 0000000000..26912152fc
--- /dev/null
+++ b/src/Symfony/Component/Validator/Constraints/LegacyChoiceValidator.php
@@ -0,0 +1,87 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Validator\Constraints;
+
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\ConstraintValidator;
+use Symfony\Component\Validator\Exception\ConstraintDefinitionException;
+use Symfony\Component\Validator\Exception\UnexpectedTypeException;
+
+/**
+ * ChoiceValidator validates that the value is one of the expected values.
+ *
+ * @author Fabien Potencier <fabien@symfony.com>
+ * @author Florian Eckerstorfer <florian@eckerstorfer.org>
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ *
+ * @deprecated Deprecated since version 2.5.3, to be removed in 3.0.
+ */
+class LegacyChoiceValidator extends ConstraintValidator
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function validate($value, Constraint $constraint)
+    {
+        if (!$constraint instanceof Choice) {
+            throw new UnexpectedTypeException($constraint, __NAMESPACE__.'\Choice');
+        }
+
+        if (!$constraint->choices && !$constraint->callback) {
+            throw new ConstraintDefinitionException('Either "choices" or "callback" must be specified on constraint Choice');
+        }
+
+        if (null === $value) {
+            return;
+        }
+
+        if ($constraint->multiple && !is_array($value)) {
+            throw new UnexpectedTypeException($value, 'array');
+        }
+
+        if ($constraint->callback) {
+            if (is_callable(array($this->context->getClassName(), $constraint->callback))) {
+                $choices = call_user_func(array($this->context->getClassName(), $constraint->callback));
+            } elseif (is_callable($constraint->callback)) {
+                $choices = call_user_func($constraint->callback);
+            } else {
+                throw new ConstraintDefinitionException('The Choice constraint expects a valid callback');
+            }
+        } else {
+            $choices = $constraint->choices;
+        }
+
+        if ($constraint->multiple) {
+            foreach ($value as $_value) {
+                if (!in_array($_value, $choices, $constraint->strict)) {
+                    $this->context->addViolation($constraint->multipleMessage, array('{{ value }}' => $_value));
+                }
+            }
+
+            $count = count($value);
+
+            if ($constraint->min !== null && $count < $constraint->min) {
+                $this->context->addViolation($constraint->minMessage, array('{{ limit }}' => $constraint->min), null, (int) $constraint->min);
+
+                return;
+            }
+
+            if ($constraint->max !== null && $count > $constraint->max) {
+                $this->context->addViolation($constraint->maxMessage, array('{{ limit }}' => $constraint->max), null, (int) $constraint->max);
+
+                return;
+            }
+        } elseif (!in_array($value, $choices, $constraint->strict)) {
+            $this->context->addViolation($constraint->message, array('{{ value }}' => $value));
+        }
+    }
+}
diff --git a/src/Symfony/Component/Validator/Constraints/LegacyCollectionValidator.php b/src/Symfony/Component/Validator/Constraints/LegacyCollectionValidator.php
new file mode 100644
index 0000000000..6618079fd1
--- /dev/null
+++ b/src/Symfony/Component/Validator/Constraints/LegacyCollectionValidator.php
@@ -0,0 +1,80 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Validator\Constraints;
+
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\ConstraintValidator;
+use Symfony\Component\Validator\Exception\UnexpectedTypeException;
+
+/**
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ *
+ * @deprecated Deprecated since version 2.5.3, to be removed in 3.0.
+ */
+class LegacyCollectionValidator extends ConstraintValidator
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function validate($value, Constraint $constraint)
+    {
+        if (!$constraint instanceof Collection) {
+            throw new UnexpectedTypeException($constraint, __NAMESPACE__.'\Collection');
+        }
+
+        if (null === $value) {
+            return;
+        }
+
+        if (!is_array($value) && !($value instanceof \Traversable && $value instanceof \ArrayAccess)) {
+            throw new UnexpectedTypeException($value, 'array or Traversable and ArrayAccess');
+        }
+
+        // We need to keep the initialized context when CollectionValidator
+        // calls itself recursively (Collection constraints can be nested).
+        // Since the context of the validator is overwritten when initialize()
+        // is called for the nested constraint, the outer validator is
+        // acting on the wrong context when the nested validation terminates.
+        //
+        // A better solution - which should be approached in Symfony 3.0 - is to
+        // remove the initialize() method and pass the context as last argument
+        // to validate() instead.
+        $context = $this->context;
+        $group = $context->getGroup();
+
+        foreach ($constraint->fields as $field => $fieldConstraint) {
+            if (
+                // bug fix issue #2779
+                (is_array($value) && array_key_exists($field, $value)) ||
+                ($value instanceof \ArrayAccess && $value->offsetExists($field))
+            ) {
+                foreach ($fieldConstraint->constraints as $constr) {
+                    $context->validateValue($value[$field], $constr, '['.$field.']', $group);
+                }
+            } elseif (!$fieldConstraint instanceof Optional && !$constraint->allowMissingFields) {
+                $context->addViolationAt('['.$field.']', $constraint->missingFieldsMessage, array(
+                    '{{ field }}' => $field
+                ), null);
+            }
+        }
+
+        if (!$constraint->allowExtraFields) {
+            foreach ($value as $field => $fieldValue) {
+                if (!isset($constraint->fields[$field])) {
+                    $context->addViolationAt('['.$field.']', $constraint->extraFieldsMessage, array(
+                        '{{ field }}' => $field
+                    ), $fieldValue);
+                }
+            }
+        }
+    }
+}
diff --git a/src/Symfony/Component/Validator/Constraints/LegacyCountValidator.php b/src/Symfony/Component/Validator/Constraints/LegacyCountValidator.php
new file mode 100644
index 0000000000..5e34fb57dd
--- /dev/null
+++ b/src/Symfony/Component/Validator/Constraints/LegacyCountValidator.php
@@ -0,0 +1,65 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Validator\Constraints;
+
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\ConstraintValidator;
+use Symfony\Component\Validator\Exception\UnexpectedTypeException;
+
+/**
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ *
+ * @deprecated Deprecated since version 2.5.3, to be removed in 3.0.
+ */
+class LegacyCountValidator extends ConstraintValidator
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function validate($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) $constraint->min);
+        }
+    }
+}
diff --git a/src/Symfony/Component/Validator/Constraints/LegacyLengthValidator.php b/src/Symfony/Component/Validator/Constraints/LegacyLengthValidator.php
new file mode 100644
index 0000000000..2d2b8f8d34
--- /dev/null
+++ b/src/Symfony/Component/Validator/Constraints/LegacyLengthValidator.php
@@ -0,0 +1,77 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Validator\Constraints;
+
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\ConstraintValidator;
+use Symfony\Component\Validator\Exception\UnexpectedTypeException;
+
+/**
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ *
+ * @deprecated Deprecated since version 2.5.3, to be removed in 3.0.
+ */
+class LegacyLengthValidator extends ConstraintValidator
+{
+    /**
+     * {@inheritdoc}
+     */
+    public function validate($value, Constraint $constraint)
+    {
+        if (!$constraint instanceof Length) {
+            throw new UnexpectedTypeException($constraint, __NAMESPACE__.'\Length');
+        }
+
+        if (null === $value || '' === $value) {
+            return;
+        }
+
+        if (!is_scalar($value) && !(is_object($value) && method_exists($value, '__toString'))) {
+            throw new UnexpectedTypeException($value, 'string');
+        }
+
+        $stringValue = (string) $value;
+
+        if (function_exists('grapheme_strlen') && 'UTF-8' === $constraint->charset) {
+            $length = grapheme_strlen($stringValue);
+        } elseif (function_exists('mb_strlen')) {
+            $length = mb_strlen($stringValue, $constraint->charset);
+        } else {
+            $length = strlen($stringValue);
+        }
+
+        if ($constraint->min == $constraint->max && $length != $constraint->min) {
+            $this->context->addViolation($constraint->exactMessage, array(
+                '{{ value }}' => $stringValue,
+                '{{ limit }}' => $constraint->min,
+            ), $value, (int) $constraint->min);
+
+            return;
+        }
+
+        if (null !== $constraint->max && $length > $constraint->max) {
+            $this->context->addViolation($constraint->maxMessage, array(
+                '{{ value }}' => $stringValue,
+                '{{ limit }}' => $constraint->max,
+            ), $value, (int) $constraint->max);
+
+            return;
+        }
+
+        if (null !== $constraint->min && $length < $constraint->min) {
+            $this->context->addViolation($constraint->minMessage, array(
+                '{{ value }}' => $stringValue,
+                '{{ limit }}' => $constraint->min,
+            ), $value, (int) $constraint->min);
+        }
+    }
+}
diff --git a/src/Symfony/Component/Validator/Constraints/LengthValidator.php b/src/Symfony/Component/Validator/Constraints/LengthValidator.php
index db9e0ab5ab..2d94ae4d8d 100644
--- a/src/Symfony/Component/Validator/Constraints/LengthValidator.php
+++ b/src/Symfony/Component/Validator/Constraints/LengthValidator.php
@@ -48,28 +48,34 @@ class LengthValidator extends ConstraintValidator
         }
 
         if ($constraint->min == $constraint->max && $length != $constraint->min) {
-            $this->context->addViolation($constraint->exactMessage, array(
-                '{{ value }}' => $stringValue,
-                '{{ limit }}' => $constraint->min,
-            ), $value, (int) $constraint->min);
+            $this->context->buildViolation($constraint->exactMessage)
+                ->setParameter('{{ value }}', $stringValue)
+                ->setParameter('{{ limit }}', $constraint->min)
+                ->setValue($value)
+                ->setPlural((int) $constraint->min)
+                ->addViolation();
 
             return;
         }
 
         if (null !== $constraint->max && $length > $constraint->max) {
-            $this->context->addViolation($constraint->maxMessage, array(
-                '{{ value }}' => $stringValue,
-                '{{ limit }}' => $constraint->max,
-            ), $value, (int) $constraint->max);
+            $this->context->buildViolation($constraint->maxMessage)
+                ->setParameter('{{ value }}', $stringValue)
+                ->setParameter('{{ limit }}', $constraint->max)
+                ->setValue($value)
+                ->setPlural((int) $constraint->max)
+                ->addViolation();
 
             return;
         }
 
         if (null !== $constraint->min && $length < $constraint->min) {
-            $this->context->addViolation($constraint->minMessage, array(
-                '{{ value }}' => $stringValue,
-                '{{ limit }}' => $constraint->min,
-            ), $value, (int) $constraint->min);
+            $this->context->buildViolation($constraint->minMessage)
+                ->setParameter('{{ value }}', $stringValue)
+                ->setParameter('{{ limit }}', $constraint->min)
+                ->setValue($value)
+                ->setPlural((int) $constraint->min)
+                ->addViolation();
         }
     }
 }
diff --git a/src/Symfony/Component/Validator/LegacyConstraintValidatorFactory.php b/src/Symfony/Component/Validator/LegacyConstraintValidatorFactory.php
new file mode 100644
index 0000000000..d85f3bd01d
--- /dev/null
+++ b/src/Symfony/Component/Validator/LegacyConstraintValidatorFactory.php
@@ -0,0 +1,71 @@
+<?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\Constraints\ExpressionValidator;
+
+/**
+ * Backwards compatible implementation of the {@link ConstraintValidatorFactoryInterface}.
+ *
+ * This class uses legacy constraint validators where possible to ensure
+ * compatibility with the 2.4 validator API.
+ *
+ * @author Bernhard Schussek <bschussek@gmail.com>
+ *
+ * @deprecated Deprecated since version 2.5.3, to be removed in 3.0.
+ */
+class LegacyConstraintValidatorFactory implements ConstraintValidatorFactoryInterface
+{
+    protected $validators = array();
+
+    private $propertyAccessor;
+
+    public function __construct($propertyAccessor = null)
+    {
+        $this->propertyAccessor = $propertyAccessor;
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function getInstance(Constraint $constraint)
+    {
+        switch (get_class($constraint)) {
+            case __NAMESPACE__.'\\Constraints\\All':
+                $className = __NAMESPACE__.'\\Constraints\\LegacyAllValidator';
+                break;
+            case __NAMESPACE__.'\\Constraints\\Choice':
+                $className = __NAMESPACE__.'\\Constraints\\LegacyChoiceValidator';
+                break;
+            case __NAMESPACE__.'\\Constraints\\Collection':
+                $className = __NAMESPACE__.'\\Constraints\\LegacyCollectionValidator';
+                break;
+            case __NAMESPACE__.'\\Constraints\\Count':
+                $className = __NAMESPACE__.'\\Constraints\\LegacyCountValidator';
+                break;
+            case __NAMESPACE__.'\\Constraints\\Length':
+                $className = __NAMESPACE__.'\\Constraints\\LegacyLengthValidator';
+                break;
+            default:
+                $className = $constraint->validatedBy();
+                break;
+        }
+
+        if (!isset($this->validators[$className])) {
+            $this->validators[$className] = 'validator.expression' === $className
+                ? new ExpressionValidator($this->propertyAccessor)
+                : new $className();
+        }
+
+        return $this->validators[$className];
+    }
+}