1 files changed, 35 insertions, 0 deletions
diff --git a/Acl/Domain/ObjectIdentityRetrievalStrategy.php b/Acl/Domain/ObjectIdentityRetrievalStrategy.php
new file mode 100644
index 0000000..64315bf
--- /dev/null
+++ b/Acl/Domain/ObjectIdentityRetrievalStrategy.php
@@ -0,0 +1,35 @@
+<?php
+
+namespace Symfony\Component\Security\Acl\Domain;
+
+use Symfony\Component\Security\Acl\Exception\InvalidDomainObjectException;
+use Symfony\Component\Security\Acl\Model\ObjectIdentityRetrievalStrategyInterface;
+
+/*
+ * This file is part of the Symfony framework.
+ *
+ * (c) Fabien Potencier <fabien.potencier@symfony-project.com>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+/**
+ * Strategy to be used for retrieving object identities from domain objects
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class ObjectIdentityRetrievalStrategy implements ObjectIdentityRetrievalStrategyInterface
+{
+    /**
+     * {@inheritDoc}
+     */
+    public function getObjectIdentity($domainObject)
+    {
+        try {
+            return ObjectIdentity::fromDomainObject($domainObject);
+        } catch (InvalidDomainObjectException $failed) {
+            return null;
+        }
+    }
+}
+\ No newline at end of file