diff -r 000000000000 -r 7f95f8617b0b vendor/symfony/src/Symfony/Component/Security/Acl/Domain/AclCollectionCache.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/vendor/symfony/src/Symfony/Component/Security/Acl/Domain/AclCollectionCache.php	Sat Sep 24 15:40:41 2011 +0200
@@ -0,0 +1,66 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Security\Acl\Domain;
+
+use Symfony\Component\Security\Acl\Model\AclProviderInterface;
+use Symfony\Component\Security\Acl\Model\ObjectIdentityRetrievalStrategyInterface;
+use Symfony\Component\Security\Acl\Model\SecurityIdentityRetrievalStrategyInterface;
+
+/**
+ * This service caches ACLs for an entire collection of objects.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class AclCollectionCache
+{
+    private $aclProvider;
+    private $objectIdentityRetrievalStrategy;
+    private $securityIdentityRetrievalStrategy;
+
+    /**
+     * Constructor.
+     *
+     * @param AclProviderInterface              $aclProvider
+     * @param ObjectIdentityRetrievalStrategy   $oidRetrievalStrategy
+     * @param SecurityIdentityRetrievalStrategy $sidRetrievalStrategy
+     * @return void
+     */
+    public function __construct(AclProviderInterface $aclProvider, ObjectIdentityRetrievalStrategyInterface $oidRetrievalStrategy, SecurityIdentityRetrievalStrategyInterface $sidRetrievalStrategy)
+    {
+        $this->aclProvider = $aclProvider;
+        $this->objectIdentityRetrievalStrategy = $oidRetrievalStrategy;
+        $this->securityIdentityRetrievalStrategy = $sidRetrievalStrategy;
+    }
+
+    /**
+     * Batch loads ACLs for an entire collection; thus, it reduces the number
+     * of required queries considerably.
+     *
+     * @param mixed $collection anything that can be passed to foreach()
+     * @param array $tokens an array of TokenInterface implementations
+     * @return void
+     */
+    public function cache($collection, array $tokens = array())
+    {
+        $sids = array();
+        foreach ($tokens as $token) {
+            $sids = array_merge($sids, $this->securityIdentityRetrievalStrategy->getSecurityIdentities($token));
+        }
+
+        $oids = array();
+        foreach ($collection as $domainObject) {
+            $oids[] = $this->objectIdentityRetrievalStrategy->getObjectIdentity($domainObject);
+        }
+
+        $this->aclProvider->findAcls($oids, $sids);
+    }
+}