[PropertyAccess] Throw an UnexpectedTypeException when the type do not match

src/Symfony/Component/PropertyAccess/PropertyAccessor.php

@@ -400,6 +400,7 @@ class PropertyAccessor implements PropertyAccessorInterface
      *
      * @throws NoSuchPropertyException If the property does not exist or is not
      *                                 public.
+     * @throws UnexpectedTypeException
      */
     private function writeProperty(&$object, $property, $singular, $value)
     {
@@ -410,7 +411,7 @@ class PropertyAccessor implements PropertyAccessorInterface
         $access = $this->getWriteAccessInfo($object, $property, $singular, $value);
 
         if (self::ACCESS_TYPE_METHOD === $access[self::ACCESS_TYPE]) {
-            $object->{$access[self::ACCESS_NAME]}($value);
+            $this->callMethod($object, $access[self::ACCESS_NAME], $value);
         } elseif (self::ACCESS_TYPE_PROPERTY === $access[self::ACCESS_TYPE]) {
             $object->{$access[self::ACCESS_NAME]} = $value;
         } elseif (self::ACCESS_TYPE_ADDER_AND_REMOVER === $access[self::ACCESS_TYPE]) {
@@ -457,12 +458,78 @@ class PropertyAccessor implements PropertyAccessorInterface
 
             $object->$property = $value;
         } elseif (self::ACCESS_TYPE_MAGIC === $access[self::ACCESS_TYPE]) {
-            $object->{$access[self::ACCESS_NAME]}($value);
+            $this->callMethod($object, $access[self::ACCESS_NAME], $value);
         } else {
             throw new NoSuchPropertyException($access[self::ACCESS_NAME]);
         }
     }
 
+    /**
+     * Throws a {@see UnexpectedTypeException} as in PHP 7 when using PHP 5.
+     *
+     * @param object $object
+     * @param string $method
+     * @param mixed  $value
+     *
+     * @throws UnexpectedTypeException
+     * @throws \Exception
+     */
+    private function callMethod($object, $method, $value) {
+        if (PHP_MAJOR_VERSION >= 7) {
+            try {
+                $object->{$method}($value);
+            } catch (\TypeError $e) {
+                throw $this->createUnexpectedTypeException($object, $method, $value);
+            }
+
+            return;
+        }
+
+        $that = $this;
+        set_error_handler(function ($errno, $errstr) use ($object, $method, $value, $that) {
+            if (E_RECOVERABLE_ERROR === $errno && false !== strpos($errstr, sprintf('passed to %s::%s() must', get_class($object), $method))) {
+                throw $that->createUnexpectedTypeException($object, $method, $value);
+            }
+
+            return false;
+        });
+
+        try {
+            $object->{$method}($value);
+            restore_error_handler();
+        } catch (\Exception $e) {
+            // Cannot use finally in 5.5 because of https://bugs.php.net/bug.php?id=67047
+            restore_error_handler();
+
+            throw $e;
+        }
+    }
+
+    /**
+     * Creates an UnexpectedTypeException.
+     *
+     * @param object $object
+     * @param string $method
+     * @param mixed  $value
+     *
+     * @return UnexpectedTypeException
+     */
+    private function createUnexpectedTypeException($object, $method, $value)
+    {
+        $reflectionMethod = new \ReflectionMethod($object, $method);
+        $parameters = $reflectionMethod->getParameters();
+
+        $expectedType = 'unknown';
+        if (isset($parameters[0])) {
+            $class = $parameters[0]->getClass();
+            if (null !== $class) {
+                $expectedType = $class->getName();
+            }
+        }
+
+        return new UnexpectedTypeException($value, $expectedType);
+    }
+
     /**
      * Guesses how to write the property value.
      *

src/Symfony/Component/PropertyAccess/PropertyAccessorInterface.php

@@ -45,7 +45,6 @@ interface PropertyAccessorInterface
      *
      * @throws Exception\NoSuchPropertyException If a property does not exist or is not public.
      * @throws Exception\UnexpectedTypeException If a value within the path is neither object
-     *                                           nor array
      */
     public function setValue(&$objectOrArray, $propertyPath, $value);
 

src/Symfony/Component/PropertyAccess/Tests/Fixtures/TypeHinted.php

@@ -0,0 +1,30 @@
+<?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\PropertyAccess\Tests\Fixtures;
+
+/**
+ * @author Kévin Dunglas <dunglas@gmail.com>
+ */
+class TypeHinted
+{
+    private $date;
+
+    public function setDate(\DateTime $date)
+    {
+        $this->date = $date;
+    }
+
+    public function getDate()
+    {
+        return $this->date;
+    }
+}

src/Symfony/Component/PropertyAccess/Tests/PropertyAccessorTest.php

@@ -16,6 +16,7 @@ use Symfony\Component\PropertyAccess\Tests\Fixtures\Author;
 use Symfony\Component\PropertyAccess\Tests\Fixtures\Magician;
 use Symfony\Component\PropertyAccess\Tests\Fixtures\MagicianCall;
 use Symfony\Component\PropertyAccess\Tests\Fixtures\Ticket5775Object;
+use Symfony\Component\PropertyAccess\Tests\Fixtures\TypeHinted;
 
 class PropertyAccessorTest extends \PHPUnit_Framework_TestCase
 {
@@ -403,4 +404,22 @@ class PropertyAccessorTest extends \PHPUnit_Framework_TestCase
             array(array('root' => array('index' => array())), '[root][index][firstName]', null),
         );
     }
+
+    /**
+     * @expectedException \Symfony\Component\PropertyAccess\Exception\UnexpectedTypeException
+     * @expectedExceptionMessage Expected argument of type "DateTime", "string" given
+     */
+    public function testThrowTypeError()
+    {
+        $this->propertyAccessor->setValue(new TypeHinted(), 'date', 'This is a string, \DateTime excepted.');
+    }
+
+    public function testSetTypeHint()
+    {
+        $date = new \DateTime();
+        $object = new TypeHinted();
+
+        $this->propertyAccessor->setValue($object, 'date', $date);
+        $this->assertSame($date, $object->getDate());
+    }
 }