Created abstract base class for Cart helper so we can create other service...

Created abstract base class for Cart helper so we can create other service locator based view helpers.

module/VuFind/src/VuFind/Theme/Root/Helper/AbstractServiceLocator.php

+<?php
+/**
+ * Base class for helpers that pull resources from the service locator.
+ *
+ * PHP version 5
+ *
+ * Copyright (C) Villanova University 2010.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2,
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ * @category VuFind2
+ * @package  View_Helpers
+ * @author   Demian Katz <demian.katz@villanova.edu>
+ * @license  http://opensource.org/licenses/gpl-2.0.php GNU General Public License
+ * @link     http://vufind.org/wiki/building_a_recommendations_module Wiki
+ */
+namespace VuFind\Theme\Root\Helper;
+use Zend\ServiceManager\ServiceLocatorInterface,
+    Zend\ServiceManager\ServiceLocatorAwareInterface,
+    Zend\View\Helper\AbstractHelper;
+
+/**
+ * Base class for helpers that pull resources from the service locator.
+ *
+ * @category VuFind2
+ * @package  View_Helpers
+ * @author   Demian Katz <demian.katz@villanova.edu>
+ * @license  http://opensource.org/licenses/gpl-2.0.php GNU General Public License
+ * @link     http://vufind.org/wiki/building_a_recommendations_module Wiki
+ */
+abstract class AbstractServiceLocator extends AbstractHelper
+    implements ServiceLocatorAwareInterface
+{
+    protected $serviceLocator;
+
+    /**
+     * Set the service locator.
+     *
+     * @param ServiceLocatorInterface $serviceLocator Locator to register
+     *
+     * @return Manager
+     */
+    public function setServiceLocator(ServiceLocatorInterface $serviceLocator)
+    {
+        // The service locator passed in here is a Zend\View\HelperPluginManager;
+        // we want to pull out the main Zend\ServiceManager\ServiceManager.
+        $this->serviceLocator = $serviceLocator->getServiceLocator();
+        return $this;
+    }
+
+    /**
+     * Get the service locator.
+     *
+     * @return \Zend\ServiceManager\ServiceLocatorInterface
+     */
+    public function getServiceLocator()
+    {
+        return $this->serviceLocator;
+    }
+}
\ No newline at end of file

module/VuFind/src/VuFind/Theme/Root/Helper/Cart.php

@@ -26,9 +26,6 @@
  * @link     http://vufind.org/wiki/building_a_recommendations_module Wiki
  */
 namespace VuFind\Theme\Root\Helper;
-use Zend\ServiceManager\ServiceLocatorInterface,
-    Zend\ServiceManager\ServiceLocatorAwareInterface,
-    Zend\View\Helper\AbstractHelper;
 
 /**
  * Cart view helper
@@ -39,10 +36,8 @@ use Zend\ServiceManager\ServiceLocatorInterface,
  * @license  http://opensource.org/licenses/gpl-2.0.php GNU General Public License
  * @link     http://vufind.org/wiki/building_a_recommendations_module Wiki
  */
-class Cart extends AbstractHelper implements ServiceLocatorAwareInterface
+class Cart extends AbstractServiceLocator
 {
-    protected $serviceLocator;
-
     /**
      * Get the Cart object from the service manager.
      *
@@ -52,29 +47,4 @@ class Cart extends AbstractHelper implements ServiceLocatorAwareInterface
     {
         return $this->getServiceLocator()->get('Cart');
     }
-
-    /**
-     * Set the service locator.
-     *
-     * @param ServiceLocatorInterface $serviceLocator Locator to register
-     *
-     * @return Manager
-     */
-    public function setServiceLocator(ServiceLocatorInterface $serviceLocator)
-    {
-        // The service locator passed in here is a Zend\View\HelperPluginManager;
-        // we want to pull out the main Zend\ServiceManager\ServiceManager.
-        $this->serviceLocator = $serviceLocator->getServiceLocator();
-        return $this;
-    }
-
-    /**
-     * Get the service locator.
-     *
-     * @return \Zend\ServiceManager\ServiceLocatorInterface
-     */
-    public function getServiceLocator()
-    {
-        return $this->serviceLocator;
-    }
 }
\ No newline at end of file