diff --git a/src/Factories/FilterFactory.php b/src/Factories/FilterFactory.php
new file mode 100644
index 0000000..1850812
--- /dev/null
+++ b/src/Factories/FilterFactory.php
@@ -0,0 +1,37 @@
+<?php
+
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+namespace Maslosoft\Signals\Factories;
+
+use Maslosoft\Signals\Signal;
+
+/**
+ * FilterFactory
+ *
+ * @author Piotr Maselkowski <pmaselkowski at gmail.com>
+ */
+class FilterFactory
+{
+
+	public static function create(Signal $signal, $interface)
+	{
+		$filters = [];
+		$di = $signal->getDi();
+		foreach ($signal->filters as $config)
+		{
+			$filter = $di->apply($config);
+			if (!$filter instanceof $interface)
+			{
+				continue;
+			}
+			$filters[] = $filter;
+		}
+		return $filters;
+	}
+
+}
diff --git a/src/Helpers/PostFilter.php b/src/Helpers/PostFilter.php
new file mode 100644
index 0000000..be20817
--- /dev/null
+++ b/src/Helpers/PostFilter.php
@@ -0,0 +1,36 @@
+<?php
+
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+namespace Maslosoft\Signals\Helpers;
+
+use Maslosoft\Signals\Interfaces\PostFilterInterface;
+use Maslosoft\Signals\Interfaces\SignalInterface;
+use Maslosoft\Signals\Signal;
+
+/**
+ * PostFilter
+ *
+ * @author Piotr Maselkowski <pmaselkowski at gmail.com>
+ */
+class PostFilter
+{
+
+	public static function filter(Signal $signals, $injected, SignalInterface $signal)
+	{
+		$preFilters = $signals->getFilters(PostFilterInterface::class);
+		foreach ($preFilters as $filter)
+		{
+			if (!$filter->filter($injected, $signal))
+			{
+				return false;
+			}
+		}
+		return true;
+	}
+
+}
diff --git a/src/Helpers/PreFilter.php b/src/Helpers/PreFilter.php
new file mode 100644
index 0000000..5d6f768
--- /dev/null
+++ b/src/Helpers/PreFilter.php
@@ -0,0 +1,36 @@
+<?php
+
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+namespace Maslosoft\Signals\Helpers;
+
+use Maslosoft\Signals\Interfaces\PreFilterInterface;
+use Maslosoft\Signals\Interfaces\SignalInterface;
+use Maslosoft\Signals\Signal;
+
+/**
+ * PreFilter
+ *
+ * @author Piotr Maselkowski <pmaselkowski at gmail.com>
+ */
+class PreFilter
+{
+
+	public static function filter(Signal $signals, $fqn, SignalInterface $signal)
+	{
+		$preFilters = $signals->getFilters(PreFilterInterface::class);
+		foreach ($preFilters as $filter)
+		{
+			if (!$filter->filter($fqn, $signal))
+			{
+				return false;
+			}
+		}
+		return true;
+	}
+
+}
diff --git a/src/Interfaces/FilterInterface.php b/src/Interfaces/FilterInterface.php
new file mode 100644
index 0000000..f17cbd7
--- /dev/null
+++ b/src/Interfaces/FilterInterface.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * To change this license header, choose License Headers in Project Properties.
+ * To change this template file, choose Tools | Templates
+ * and open the template in the editor.
+ */
+
+namespace Maslosoft\Signals\Interfaces;
+
+/**
+ *
+ * @author Piotr Maselkowski <pmaselkowski at gmail.com>
+ */
+interface FilterInterface
+{
+
+}