diff --git a/Annotation/ApiDoc.php b/Annotation/ApiDoc.php
index 603227e..6fdb4ac 100644
--- a/Annotation/ApiDoc.php
+++ b/Annotation/ApiDoc.php
@@ -26,7 +26,7 @@ class ApiDoc
     /**
      * @var string
      */
-    private $inputClass = null;
+    private $input = null;
 
     /**
      * @var string
@@ -70,8 +70,8 @@ class ApiDoc
 
     public function __construct(array $data)
     {
-        if (isset($data['inputClass'])) {
-            $this->inputClass = $data['inputClass'];
+        if (isset($data['input'])) {
+            $this->input = $data['input'];
         } elseif (isset($data['filters'])) {
             foreach ($data['filters'] as $filter) {
                 if (!isset($filter['name'])) {
@@ -121,9 +121,9 @@ class ApiDoc
     /**
      * @return string|null
      */
-    public function getInputClass()
+    public function getInput()
     {
-        return $this->inputClass;
+        return $this->input;
     }
 
     /**
@@ -227,9 +227,9 @@ class ApiDoc
         if ($requirements = $this->requirements) {
             $data['requirements'] = $requirements;
         }
-        
-        if ($inputClass = $this->inputClass) {
-            $data['inputClass'] = $inputClass;
+
+        if ($input = $this->input) {
+            $data['input'] = $input;
         }
 
         return $data;
diff --git a/DependencyInjection/RegisterExtractorClassParsersPass.php b/DependencyInjection/RegisterExtractorClassParsersPass.php
deleted file mode 100644
index a7467fd..0000000
--- a/DependencyInjection/RegisterExtractorClassParsersPass.php
+++ /dev/null
@@ -1,23 +0,0 @@
-<?php
-
-namespace Nelmio\ApiDocBundle\DependencyInjection;
-
-use Symfony\Component\DependencyInjection\ContainerBuilder;
-use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
-use Symfony\Component\DependencyInjection\Reference;
-
-class RegisterExtractorClassParsersPass implements CompilerPassInterface
-{
-    public function process(ContainerBuilder $container)
-    {
-        if (false === $container->hasDefinition('nelmio_api_doc.extractor.api_doc_extractor')) {
-            return;
-        }
-
-        $definition = $container->getDefinition('nelmio_api_doc.extractor.api_doc_extractor');
-
-        foreach ($container->findTaggedServiceIds('nelmio_api_doc.extractor.class_parser') as $id => $attributes) {
-            $definition->addMethodCall('registerParser', array(new Reference($id)));
-        }
-    }
-}
\ No newline at end of file
diff --git a/DependencyInjection/RegisterExtractorParsersPass.php b/DependencyInjection/RegisterExtractorParsersPass.php
new file mode 100644
index 0000000..abf8fca
--- /dev/null
+++ b/DependencyInjection/RegisterExtractorParsersPass.php
@@ -0,0 +1,37 @@
+<?php
+
+namespace Nelmio\ApiDocBundle\DependencyInjection;
+
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
+use Symfony\Component\DependencyInjection\Reference;
+
+class RegisterExtractorParsersPass implements CompilerPassInterface
+{
+    public function process(ContainerBuilder $container)
+    {
+        if (false === $container->hasDefinition('nelmio_api_doc.extractor.api_doc_extractor')) {
+            return;
+        }
+
+        $definition = $container->getDefinition('nelmio_api_doc.extractor.api_doc_extractor');
+
+        //find registered parsers and sort by priority
+        $sortedParsers = array();
+        foreach ($container->findTaggedServiceIds('nelmio_api_doc.extractor.parser') as $id => $attributes) {
+            $priority = isset($attributes['priority']) ? $attributes['priority'] : 0;
+            $sortedParsers[$priority][] = $id;
+        }
+
+        //add parsers if any
+        if (!empty($sortedParsers)) {
+            krsort($sortedParsers);
+            $sortedParsers = call_user_func_array('array_merge', $sortedParsers);
+
+            //add method call for each registered parsers
+            foreach ($sortedParsers as $id) {
+                $definition->addMethodCall('addParser', array(new Reference($id)));
+            }
+        }
+    }
+}
diff --git a/Extractor/ApiDocExtractor.php b/Extractor/ApiDocExtractor.php
index 3678320..dcc8af1 100644
--- a/Extractor/ApiDocExtractor.php
+++ b/Extractor/ApiDocExtractor.php
@@ -121,8 +121,6 @@ class ApiDocExtractor
             return strcmp($a['resource'], $b['resource']);
         });
 
-
-
         return $array;
     }
 
@@ -177,14 +175,13 @@ class ApiDocExtractor
 
         return null;
     }
-    
+
     /**
      * Registers a class parser to use for parsing input class metadata
      *
-     * @param ParserInterface $parser 
-     * @return void
+     * @param ParserInterface $parser
      */
-    public function registerParser(ParserInterface $parser)
+    public function addParser(ParserInterface $parser)
     {
         $this->parsers[] = $parser;
     }
@@ -225,13 +222,13 @@ class ApiDocExtractor
         // doc
         $annotation->setDocumentation($this->getDocCommentText($method));
 
-        // inputClass
-        if (null !== $inputClass = $annotation->getInputClass()) {
+        // input
+        if (null !== $input = $annotation->getInput()) {
             $parameters = array();
 
             foreach ($this->parsers as $parser) {
-                if ($parser->supportsClass($inputClass)) {
-                    $parameters = $parser->parse($inputClass);
+                if ($parser->supports($input)) {
+                    $parameters = $parser->parse($input);
                 }
             }
 
@@ -296,7 +293,7 @@ class ApiDocExtractor
     }
 
     /**
-     * @param Reflector $reflected
+     * @param  Reflector $reflected
      * @return string
      */
     protected function getDocComment(\Reflector $reflected)
@@ -316,7 +313,7 @@ class ApiDocExtractor
     }
 
     /**
-     * @param Reflector $reflected
+     * @param  Reflector $reflected
      * @return string
      */
     protected function getDocCommentText(\Reflector $reflected)
diff --git a/Formatter/FormatterInterface.php b/Formatter/FormatterInterface.php
index dcbadd5..1a3302f 100644
--- a/Formatter/FormatterInterface.php
+++ b/Formatter/FormatterInterface.php
@@ -26,7 +26,7 @@ interface FormatterInterface
     /**
      * Format documentation data for one route.
      *
-     * @param ApiDoc       $annotation
+     * @param ApiDoc $annotation
      * return string|array
      */
     public function formatOne(ApiDoc $annotation);
diff --git a/NelmioApiDocBundle.php b/NelmioApiDocBundle.php
index 4c3a0a5..fbfe504 100644
--- a/NelmioApiDocBundle.php
+++ b/NelmioApiDocBundle.php
@@ -4,7 +4,7 @@ namespace Nelmio\ApiDocBundle;
 
 use Symfony\Component\HttpKernel\Bundle\Bundle;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
-use Nelmio\ApiDocBundle\DependencyInjection\RegisterExtractorClassParsersPass;
+use Nelmio\ApiDocBundle\DependencyInjection\RegisterExtractorParsersPass;
 
 class NelmioApiDocBundle extends Bundle
 {
@@ -12,6 +12,6 @@ class NelmioApiDocBundle extends Bundle
     {
         parent::build($container);
 
-        $container->addCompilerPass(new RegisterExtractorClassParsersPass());
+        $container->addCompilerPass(new RegisterExtractorParsersPass());
     }
 }
diff --git a/Parser/FormTypeParser.php b/Parser/FormTypeParser.php
index 598663d..af3bfac 100644
--- a/Parser/FormTypeParser.php
+++ b/Parser/FormTypeParser.php
@@ -11,8 +11,8 @@
 
 namespace Nelmio\ApiDocBundle\Parser;
 
-use Symfony\Component\Form\FormBuilder;
 use Symfony\Component\Form\FormFactoryInterface;
+use Symfony\Component\Form\Exception\FormException;
 
 class FormTypeParser implements ParserInterface
 {
@@ -39,18 +39,23 @@ class FormTypeParser implements ParserInterface
     {
         $this->formFactory = $formFactory;
     }
-    
+
     /**
      * {@inheritdoc}
      */
-    public function supportsClass($class)
+    public function supports($item)
     {
-        if (is_string($class) && class_exists($class)) {
-            $ref = new \ReflectionClass($class);
-            return ($ref->implementsInterface('Symfony\Component\Form\FormTypeInterface'));
+        try {
+            if (is_string($item) && class_exists($item)) {
+                $item = new $item();
+            }
+
+            $form = $this->formFactory->create($item);
+        } catch (FormException $e) {
+            return false;
         }
-        
-        return false;
+
+        return true;
     }
 
     /**
diff --git a/Parser/ParserInterface.php b/Parser/ParserInterface.php
index df0ba93..8df98f5 100644
--- a/Parser/ParserInterface.php
+++ b/Parser/ParserInterface.php
@@ -19,11 +19,11 @@ interface ParserInterface
     /**
      * Return true/false whether this class supports parsing the given class.
      *
-     * @param string $item  The string name of the class to parse.
+     * @param  string  $item The string type of input to parse.
      * @return boolean
      */
-	public function supportsClass($className);
-    
+    public function supports($item);
+
     /**
      * Returns an array of class property metadata where each item is a key (the property name) and
      * an array of data with the following keys:
@@ -32,9 +32,9 @@ interface ParserInterface
      *  - description       string
      *  - readonly          boolean
      *
-     * @param  string $class The string name of the class to parse.
+     * @param  string $item The string type of input to parse.
      * @return array
      */
-    public function parse($className);
-    
-}
\ No newline at end of file
+    public function parse($item);
+
+}
diff --git a/Resources/config/formatters.xml b/Resources/config/formatters.xml
index 6079c67..244fced 100644
--- a/Resources/config/formatters.xml
+++ b/Resources/config/formatters.xml
@@ -14,7 +14,7 @@
     <services>
         <service id="nelmio_api_doc.parser.form_type_parser" class="%nelmio_api_doc.parser.form_type_parser.class%">
             <argument type="service" id="form.factory" />
-            <tag name="nelmio_api_doc.extractor.class_parser" />
+            <tag name="nelmio_api_doc.extractor.parser" priority="0" />
         </service>
         <service id="nelmio_api_doc.formatter.abstract_formatter" class="%nelmio_api_doc.formatter.abstract_formatter.class%" />
         <service id="nelmio_api_doc.formatter.markdown_formatter" class="%nelmio_api_doc.formatter.markdown_formatter.class%"
diff --git a/Tests/Annotation/ApiDocTest.php b/Tests/Annotation/ApiDocTest.php
index 993bd74..d8f3212 100644
--- a/Tests/Annotation/ApiDocTest.php
+++ b/Tests/Annotation/ApiDocTest.php
@@ -27,7 +27,7 @@ class ApiDocTest extends TestCase
         $this->assertFalse(isset($array['filters']));
         $this->assertFalse($annot->isResource());
         $this->assertFalse(isset($array['description']));
-        $this->assertNull($annot->getInputClass());
+        $this->assertNull($annot->getInput());
     }
 
     public function testConstructWithInvalidData()
@@ -44,7 +44,7 @@ class ApiDocTest extends TestCase
         $this->assertFalse(isset($array['filters']));
         $this->assertFalse($annot->isResource());
         $this->assertFalse(isset($array['description']));
-        $this->assertNull($annot->getInputClass());
+        $this->assertNull($annot->getInput());
     }
 
     public function testConstruct()
@@ -60,14 +60,14 @@ class ApiDocTest extends TestCase
         $this->assertFalse(isset($array['filters']));
         $this->assertFalse($annot->isResource());
         $this->assertEquals($data['description'], $array['description']);
-        $this->assertNull($annot->getInputClass());
+        $this->assertNull($annot->getInput());
     }
 
     public function testConstructDefinesAFormType()
     {
         $data = array(
             'description'   => 'Heya',
-            'inputClass'      => 'My\Form\Type',
+            'input'         => 'My\Form\Type',
         );
 
         $annot = new ApiDoc($data);
@@ -77,7 +77,7 @@ class ApiDocTest extends TestCase
         $this->assertFalse(isset($array['filters']));
         $this->assertFalse($annot->isResource());
         $this->assertEquals($data['description'], $array['description']);
-        $this->assertEquals($data['inputClass'], $annot->getInputClass());
+        $this->assertEquals($data['input'], $annot->getInput());
     }
 
     public function testConstructMethodIsResource()
@@ -85,7 +85,7 @@ class ApiDocTest extends TestCase
         $data = array(
             'resource'      => true,
             'description'   => 'Heya',
-            'inputClass'      => 'My\Form\Type',
+            'input'         => 'My\Form\Type',
         );
 
         $annot = new ApiDoc($data);
@@ -95,7 +95,7 @@ class ApiDocTest extends TestCase
         $this->assertFalse(isset($array['filters']));
         $this->assertTrue($annot->isResource());
         $this->assertEquals($data['description'], $array['description']);
-        $this->assertEquals($data['inputClass'], $annot->getInputClass());
+        $this->assertEquals($data['input'], $annot->getInput());
     }
 
     public function testConstructMethodResourceIsFalse()
@@ -103,7 +103,7 @@ class ApiDocTest extends TestCase
         $data = array(
             'resource'      => false,
             'description'   => 'Heya',
-            'inputClass'      => 'My\Form\Type',
+            'input'         => 'My\Form\Type',
         );
 
         $annot = new ApiDoc($data);
@@ -113,7 +113,7 @@ class ApiDocTest extends TestCase
         $this->assertFalse(isset($array['filters']));
         $this->assertFalse($annot->isResource());
         $this->assertEquals($data['description'], $array['description']);
-        $this->assertEquals($data['inputClass'], $annot->getInputClass());
+        $this->assertEquals($data['input'], $annot->getInput());
     }
 
     public function testConstructMethodHasFilters()
@@ -135,7 +135,7 @@ class ApiDocTest extends TestCase
         $this->assertEquals(array('a-filter' => array()), $array['filters']);
         $this->assertTrue($annot->isResource());
         $this->assertEquals($data['description'], $array['description']);
-        $this->assertNull($annot->getInputClass());
+        $this->assertNull($annot->getInput());
     }
 
     /**
@@ -158,7 +158,7 @@ class ApiDocTest extends TestCase
         $data = array(
             'resource'      => true,
             'description'   => 'Heya',
-            'inputClass'      => 'My\Form\Type',
+            'input'         => 'My\Form\Type',
             'filters'       => array(
                 array('name' => 'a-filter'),
             ),
@@ -171,6 +171,6 @@ class ApiDocTest extends TestCase
         $this->assertFalse(isset($array['filters']));
         $this->assertTrue($annot->isResource());
         $this->assertEquals($data['description'], $array['description']);
-        $this->assertEquals($data['inputClass'], $annot->getInputClass());
+        $this->assertEquals($data['input'], $annot->getInput());
     }
 }
diff --git a/Tests/Extractor/ApiDocExtratorTest.php b/Tests/Extractor/ApiDocExtratorTest.php
index b45bb92..b092643 100644
--- a/Tests/Extractor/ApiDocExtratorTest.php
+++ b/Tests/Extractor/ApiDocExtratorTest.php
@@ -39,28 +39,28 @@ class ApiDocExtractorTest extends WebTestCase
         $this->assertTrue($a1->isResource());
         $this->assertEquals('index action', $a1->getDescription());
         $this->assertTrue(is_array($array1['filters']));
-        $this->assertNull($a1->getInputClass());
+        $this->assertNull($a1->getInput());
 
         $a1 = $data[1]['annotation'];
         $array1 = $a1->toArray();
         $this->assertTrue($a1->isResource());
         $this->assertEquals('index action', $a1->getDescription());
         $this->assertTrue(is_array($array1['filters']));
-        $this->assertNull($a1->getInputClass());
+        $this->assertNull($a1->getInput());
 
         $a2 = $data[2]['annotation'];
         $array2 = $a2->toArray();
         $this->assertFalse($a2->isResource());
         $this->assertEquals('create test', $a2->getDescription());
         $this->assertFalse(isset($array2['filters']));
-        $this->assertEquals('Nelmio\ApiDocBundle\Tests\Fixtures\Form\TestType', $a2->getInputClass());
+        $this->assertEquals('Nelmio\ApiDocBundle\Tests\Fixtures\Form\TestType', $a2->getInput());
 
         $a2 = $data[3]['annotation'];
         $array2 = $a2->toArray();
         $this->assertFalse($a2->isResource());
         $this->assertEquals('create test', $a2->getDescription());
         $this->assertFalse(isset($array2['filters']));
-        $this->assertEquals('Nelmio\ApiDocBundle\Tests\Fixtures\Form\TestType', $a2->getInputClass());
+        $this->assertEquals('Nelmio\ApiDocBundle\Tests\Fixtures\Form\TestType', $a2->getInput());
     }
 
     public function testGet()
@@ -76,7 +76,7 @@ class ApiDocExtractorTest extends WebTestCase
 
         $array = $annotation->toArray();
         $this->assertTrue(is_array($array['filters']));
-        $this->assertNull($annotation->getInputClass());
+        $this->assertNull($annotation->getInput());
 
         $annotation2 = $extractor->get('nemlio.test.controller:indexAction', 'test_service_route_1');
         $annotation2->getRoute()