Allow Forms to have an InputFilterSpecification

library/Zend/Form/Form.php

@@ -649,6 +649,14 @@ public function attachInputFilterDefaults(InputFilterInterface $inputFilter, Fie
     {
         $formFactory  = $this->getFormFactory();
         $inputFactory = $formFactory->getInputFilterFactory();
+
+        if ($this instanceof InputFilterProviderInterface) {
+            foreach ($this->getInputFilterSpecification() as $name => $spec) {
+                $input = $inputFactory->createInput($spec);
+                $inputFilter->add($input, $name);
+            }
+        }
+
         foreach ($fieldset->getElements() as $element) {
             $name = $element->getName();
 

tests/ZendTest/Form/FormTest.php

@@ -173,6 +173,15 @@ public function testDefaultNonRequiredInputFilterIsSet()
         $this->assertFalse($fooInput->isRequired());
     }
 
+    public function testInputProviderInterfaceAddsInputFilters()
+    {
+        $form = new TestAsset\InputFilterProvider();
+
+        $inputFilter = $form->getInputFilter();
+        $fooInput = $inputFilter->get('foo');
+        $this->assertTrue($fooInput->isRequired());
+    }
+
     public function testCallingIsValidRaisesExceptionIfNoDataSet()
     {
         $this->setExpectedException('Zend\Form\Exception\DomainException');

tests/ZendTest/Form/TestAsset/InputFilterProvider.php

@@ -0,0 +1,39 @@
+<?php
+/**
+ * Zend Framework (http://framework.zend.com/)
+ *
+ * @link      http://github.com/zendframework/zf2 for the canonical source repository
+ * @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   http://framework.zend.com/license/new-bsd New BSD License
+ * @package   Zend_Form
+ */
+
+namespace ZendTest\Form\TestAsset;
+
+use Zend\Form\Form;
+use Zend\InputFilter\InputFilterProviderInterface;
+
+class InputFilterProvider extends Form implements InputFilterProviderInterface
+{
+    public function __construct($name = null, $options = array())
+    {
+        parent::__construct($name, $options);
+
+        $this->add(array(
+            'name' => 'foo',
+            'options' => array(
+                'label' => 'Foo'
+            ),
+        ));
+
+    }
+
+    public function getInputFilterSpecification()
+    {
+        return array(
+            'foo' => array(
+                'required' => true,
+            )
+        );
+    }
+}