diff -r 877f952ae2bd -r 6b6c2214f778 web/lib/Zend/Cloud/Infrastructure/InstanceList.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/lib/Zend/Cloud/Infrastructure/InstanceList.php	Thu Mar 21 19:52:38 2013 +0100
@@ -0,0 +1,219 @@
+<?php
+/**
+ * @category   Zend
+ * @package    Zend_Cloud
+ * @subpackage Infrastructure
+ * @copyright  Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ */
+
+require_once 'Zend/Cloud/Infrastructure/Instance.php';
+
+/**
+ * List of instances
+ *
+ * @package    Zend_Cloud
+ * @subpackage Infrastructure
+ * @copyright  Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license    http://framework.zend.com/license/new-bsd     New BSD License
+ */
+class Zend_Cloud_Infrastructure_InstanceList implements Countable, Iterator, ArrayAccess
+{
+    /**
+     * @var array Array of Zend_Cloud_Infrastructure_Instance
+     */
+    protected $instances = array();
+
+    /**
+     * @var int Iterator key
+     */
+    protected $iteratorKey = 0;
+
+    /**
+     * @var Zend_Cloud_Infrastructure_Adapter
+     */
+    protected $adapter;
+
+    /**
+     * Constructor
+     *
+     * @param  Adapter $adapter
+     * @param  array $instances
+     * @return void
+     */
+    public function __construct($adapter, array $instances = null)
+    {
+        if (!($adapter instanceof Zend_Cloud_Infrastructure_Adapter)) {
+            require_once 'Zend/Cloud/Infrastructure/Exception.php';
+            throw new Zend_Cloud_Infrastructure_Exception('You must pass a Zend_Cloud_Infrastructure_Adapter');
+        }
+        if (empty($instances)) {
+            require_once 'Zend/Cloud/Infrastructure/Exception.php';
+            throw new Zend_Cloud_Infrastructure_Exception('You must pass an array of Instances');
+        }
+
+        $this->adapter = $adapter;
+        $this->constructFromArray($instances);
+    }
+
+    /**
+     * Transforms the Array to array of Instances
+     *
+     * @param  array $list
+     * @return void
+     */
+    protected function constructFromArray(array $list)
+    {
+        foreach ($list as $instance) {
+            $this->addInstance(new Zend_Cloud_Infrastructure_Instance($this->adapter,$instance));
+        }
+    }
+
+    /**
+     * Add an instance
+     *
+     * @param  Instance
+     * @return InstanceList
+     */
+    protected function addInstance(Zend_Cloud_Infrastructure_Instance $instance)
+    {
+        $this->instances[] = $instance;
+        return $this;
+    }
+
+    /**
+     * Return number of instances
+     *
+     * Implement Countable::count()
+     *
+     * @return int
+     */
+    public function count()
+    {
+        return count($this->instances);
+    }
+
+    /**
+     * Return the current element
+     *
+     * Implement Iterator::current()
+     *
+     * @return Instance
+     */
+    public function current()
+    {
+        return $this->instances[$this->iteratorKey];
+    }
+
+    /**
+     * Return the key of the current element
+     *
+     * Implement Iterator::key()
+     *
+     * @return int
+     */
+    public function key()
+    {
+        return $this->iteratorKey;
+    }
+
+    /**
+     * Move forward to next element
+     *
+     * Implement Iterator::next()
+     *
+     * @return void
+     */
+    public function next()
+    {
+        $this->iteratorKey++;
+    }
+
+    /**
+     * Rewind the Iterator to the first element
+     *
+     * Implement Iterator::rewind()
+     *
+     * @return void
+     */
+    public function rewind()
+    {
+        $this->iteratorKey = 0;
+    }
+
+    /**
+     * Check if there is a current element after calls to rewind() or next()
+     *
+     * Implement Iterator::valid()
+     *
+     * @return bool
+     */
+    public function valid()
+    {
+        $numItems = $this->count();
+        if ($numItems > 0 && $this->iteratorKey < $numItems) {
+            return true;
+        }
+        return false;
+    }
+
+    /**
+     * Whether the offset exists
+     *
+     * Implement ArrayAccess::offsetExists()
+     *
+     * @param  int $offset
+     * @return bool
+     */
+    public function offsetExists($offset)
+    {
+        return ($offset < $this->count());
+    }
+
+    /**
+     * Return value at given offset
+     *
+     * Implement ArrayAccess::offsetGet()
+     *
+     * @param  int $offset
+     * @return Instance
+     * @throws Zend_Cloud_Infrastructure_Exception
+     */
+    public function offsetGet($offset)
+    {
+        if (!$this->offsetExists($offset)) {
+            require_once 'Zend/Cloud/Infrastructure/Exception.php';
+            throw new Zend_Cloud_Infrastructure_Exception('Illegal index');
+        }
+        return $this->instances[$offset];
+    }
+
+    /**
+     * Throws exception because all values are read-only
+     *
+     * Implement ArrayAccess::offsetSet()
+     *
+     * @param   int     $offset
+     * @param   string  $value
+     * @throws  Zend_Cloud_Infrastructure_Exception
+     */
+    public function offsetSet($offset, $value)
+    {
+        require_once 'Zend/Cloud/Infrastructure/Exception.php';
+        throw new Zend_Cloud_Infrastructure_Exception('You are trying to set read-only property');
+    }
+
+    /**
+     * Throws exception because all values are read-only
+     *
+     * Implement ArrayAccess::offsetUnset()
+     *
+     * @param   int     $offset
+     * @throws  Zend_Cloud_Infrastructure_Exception
+     */
+    public function offsetUnset($offset)
+    {
+        require_once 'Zend/Cloud/Infrastructure/Exception.php';
+        throw new Zend_Cloud_Infrastructure_Exception('You are trying to unset read-only property');
+    }
+}