diff --git a/examples/not-symfony.php b/examples/not-symfony.php
index eca623d..1e5d2be 100644
--- a/examples/not-symfony.php
+++ b/examples/not-symfony.php
@@ -12,45 +12,60 @@
 
 require __DIR__ . '/../vendor/autoload.php';
 
-trait CustomControllerHelperTrait
+class CustomRequestParserFactory implements \MPScholten\RequestParser\RequestParserFactory
 {
-    private $queryParser;
-    private $bodyParser;
+    /**
+     * @var array
+     */
+    private $request;
+    private $exceptionFactory;
+
+    public function __construct(array $request, $exceptionFactory)
+    {
+        $this->request = $request;
+        $this->exceptionFactory = $exceptionFactory;
+    }
 
-    protected final function initRequestParser()
+    public function createQueryParser()
     {
-        $this->queryParser = new MPScholten\RequestParser\RequestParser(
+        return new MPScholten\RequestParser\RequestParser(
             function ($parameterName) {
-                if (isset($_GET[$parameterName])) {
-                    return $_GET[$parameterName];
+                if (isset($this->request[$parameterName])) {
+                    return $this->request[$parameterName];
                 }
 
                 return null;
             },
-            null
+            $this->exceptionFactory
         );
-        $this->bodyParser = new MPScholten\RequestParser\RequestParser(
+    }
+
+    public function createBodyParser()
+    {
+        return new MPScholten\RequestParser\RequestParser(
             function ($parameterName) {
-                if (isset($_POST[$parameterName])) {
-                    return $_POST[$parameterName];
+                if (isset($this->request[$parameterName])) {
+                    return $this->request[$parameterName];
                 }
 
                 return null;
             },
-            null
+            $this->exceptionFactory
         );
     }
+}
 
-    protected function queryParameter($name)
-    {
-        return $this->queryParser->get($name);
-    }
+trait CustomControllerHelperTrait
+{
+    use \MPScholten\RequestParser\BaseControllerHelperTrait;
 
-    protected function bodyParameter($name)
+    /**
+     * Will be called during the `initRequestParser()` call in `MyController`
+     */
+    protected final function createRequestParserFactory($request, $exceptionFactory)
     {
-        return $this->bodyParser->get($name);
+        return new CustomRequestParserFactory($request, $exceptionFactory);
     }
-
 }
 
 class MyController
@@ -59,7 +74,13 @@ class MyController
 
     public function __construct()
     {
-        $this->initRequestParser();
+        if ($_SERVER['REQUEST_METHOD'] === 'GET') {
+            $request = $_GET;
+        } else {
+            $request = $_POST;
+        }
+
+        $this->initRequestParser($request);
     }
 
     public function hello()
diff --git a/src/BaseControllerHelperTrait.php b/src/BaseControllerHelperTrait.php
index e3c2fbd..491695d 100644
--- a/src/BaseControllerHelperTrait.php
+++ b/src/BaseControllerHelperTrait.php
@@ -16,9 +16,10 @@ trait BaseControllerHelperTrait
 
     protected final function initRequestParser($request, callable $exceptionFactory = null)
     {
-        $requestParser = $this->createRequestParser($request, $exceptionFactory);
-        $this->queryParser = $requestParser->createQueryParser();
-        $this->bodyParser = $requestParser->createBodyParser();
+        /** @var $requestParserFactory RequestParserFactory */
+        $requestParserFactory = $this->createRequestParserFactory($request, $exceptionFactory);
+        $this->queryParser = $requestParserFactory->createQueryParser();
+        $this->bodyParser = $requestParserFactory->createBodyParser();
     }
 
     /**
diff --git a/src/Psr7/ControllerHelperTrait.php b/src/Psr7/ControllerHelperTrait.php
index a6ffb10..e48fac0 100644
--- a/src/Psr7/ControllerHelperTrait.php
+++ b/src/Psr7/ControllerHelperTrait.php
@@ -8,8 +8,8 @@ trait ControllerHelperTrait
 {
     use BaseControllerHelperTrait;
 
-    protected final function createRequestParser($request, $exceptionFactory)
+    protected final function createRequestParserFactory($request, $exceptionFactory)
     {
-        return new Psr7RequestParser($request, $exceptionFactory);
+        return new Psr7RequestParserFactory($request, $exceptionFactory);
     }
 }
diff --git a/src/Psr7/Psr7RequestParser.php b/src/Psr7/Psr7RequestParserFactory.php
similarity index 90%
rename from src/Psr7/Psr7RequestParser.php
rename to src/Psr7/Psr7RequestParserFactory.php
index 6c1d2ed..be760e1 100644
--- a/src/Psr7/Psr7RequestParser.php
+++ b/src/Psr7/Psr7RequestParserFactory.php
@@ -3,9 +3,10 @@
 namespace MPScholten\RequestParser\Psr7;
 
 use MPScholten\RequestParser\RequestParser;
+use MPScholten\RequestParser\RequestParserFactory;
 use Psr\Http\Message\ServerRequestInterface;
 
-class Psr7RequestParser
+class Psr7RequestParserFactory implements RequestParserFactory
 {
     private $request;
     private $exceptionFactory;
diff --git a/src/RequestParserFactory.php b/src/RequestParserFactory.php
new file mode 100644
index 0000000..17eeb78
--- /dev/null
+++ b/src/RequestParserFactory.php
@@ -0,0 +1,16 @@
+<?php
+
+namespace MPScholten\RequestParser;
+
+interface RequestParserFactory
+{
+    /**
+     * @return RequestParser
+     */
+    public function createQueryParser();
+
+    /**
+     * @return RequestParser
+     */
+    public function createBodyParser();
+}
diff --git a/src/Symfony/ControllerHelperTrait.php b/src/Symfony/ControllerHelperTrait.php
index 66bc012..ea39353 100644
--- a/src/Symfony/ControllerHelperTrait.php
+++ b/src/Symfony/ControllerHelperTrait.php
@@ -8,8 +8,8 @@ trait ControllerHelperTrait
 {
     use BaseControllerHelperTrait;
 
-    protected final function createRequestParser($request, $exceptionFactory)
+    protected final function createRequestParserFactory($request, $exceptionFactory)
     {
-        return new SymfonyRequestParser($request, $exceptionFactory);
+        return new SymfonyRequestParserFactory($request, $exceptionFactory);
     }
 }
diff --git a/src/Symfony/SymfonyRequestParser.php b/src/Symfony/SymfonyRequestParser.php
index a37b689..8ae2a92 100644
--- a/src/Symfony/SymfonyRequestParser.php
+++ b/src/Symfony/SymfonyRequestParser.php
@@ -2,35 +2,9 @@
 
 namespace MPScholten\RequestParser\Symfony;
 
-use MPScholten\RequestParser\RequestParser;
-use Symfony\Component\HttpFoundation\Request;
-
-class SymfonyRequestParser
+/**
+ * @deprecated This class got renamed to `SymfonyRequestParserFactory`
+ */
+class SymfonyRequestParser extends SymfonyRequestParserFactory
 {
-    private $request;
-    private $exceptionFactory;
-
-    public function __construct(Request $request, $exceptionFactory = null)
-    {
-        $this->request = $request;
-        $this->exceptionFactory = $exceptionFactory;
-    }
-
-    public function createQueryParser()
-    {
-        $readParameter = function ($name) {
-            return $this->request->query->get($name, null);
-        };
-
-        return new RequestParser($readParameter, $this->exceptionFactory);
-    }
-
-    public function createBodyParser()
-    {
-        $readParameter = function ($name) {
-            return $this->request->request->get($name, null);
-        };
-
-        return new RequestParser($readParameter, $this->exceptionFactory);
-    }
 }
diff --git a/src/Symfony/SymfonyRequestParserFactory.php b/src/Symfony/SymfonyRequestParserFactory.php
new file mode 100644
index 0000000..8fd48bb
--- /dev/null
+++ b/src/Symfony/SymfonyRequestParserFactory.php
@@ -0,0 +1,37 @@
+<?php
+
+namespace MPScholten\RequestParser\Symfony;
+
+use MPScholten\RequestParser\RequestParser;
+use MPScholten\RequestParser\RequestParserFactory;
+use Symfony\Component\HttpFoundation\Request;
+
+class SymfonyRequestParserFactory implements RequestParserFactory
+{
+    private $request;
+    private $exceptionFactory;
+
+    public function __construct(Request $request, $exceptionFactory = null)
+    {
+        $this->request = $request;
+        $this->exceptionFactory = $exceptionFactory;
+    }
+
+    public function createQueryParser()
+    {
+        $readParameter = function ($name) {
+            return $this->request->query->get($name, null);
+        };
+
+        return new RequestParser($readParameter, $this->exceptionFactory);
+    }
+
+    public function createBodyParser()
+    {
+        $readParameter = function ($name) {
+            return $this->request->request->get($name, null);
+        };
+
+        return new RequestParser($readParameter, $this->exceptionFactory);
+    }
+}