Created ArrayCollection as an SPL iterator rather than just a shell function.

git-svn-id: http://framework.zend.com/svn/framework/standard/trunk@16031 44c647ce-9c0f-0410-b52a-842ac1e357ba

library/Zend/Amf/Value/Messaging/ArrayCollection.php

@@ -29,6 +29,130 @@
  * @copyright  Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  */
-class Zend_Amf_Value_Messaging_ArrayCollection
+class Zend_Amf_Value_Messaging_ArrayCollection implements Iterator
 {
-}
+    /**
+     * Current index of source 
+     * @var integer
+     */
+    protected $_sourceIndex = 0;
+    
+    /**
+     * Data in the ArrayCollection
+     * @var unknown_type
+     */
+    protected $_source;
+    
+    /**
+     * Constructor will build an arracollection from the data supplied
+     * @param array data
+     */
+    public function __construct($data = null)
+    {
+        $this->_source = array();
+        if (!is_null($data)) {
+            $this->loadSource($data); 
+        }
+    }
+    
+    /**
+     * Get the number of elements in the collection
+     * @return integer Count
+     */
+    public function count()
+    {
+        return count($this->_source);
+    }
+    
+    /**
+     * Reset the iterator to the beginning of the data
+     * @return void
+     */
+    public function rewind()
+    {
+        $this->_sourceIndex = 0;
+    }
+    
+    /**
+     * Returns the data at the current index in the collection
+     * 
+     * @return mixed the current row or null if no rows exist. 
+     */
+    public function current()
+    {
+        if(isset($this->_source[$this->_sourceIndex])) {
+            return $this->_source[$this->_sourceIndex];
+        } else {
+            return null;
+        }
+    }
+    
+    
+    /**
+     * Returns the collections current index number
+     * @return mixed the current row number (starts at 0), null if there is no data 
+     */
+    public function key()
+    {
+        return $this->_sourceIndex;
+    }
+
+    /**
+     * @return mixed the next row number collection, or null if not another row.
+     */
+    public function next()
+    {
+       return ++$this->_sourceIndex;
+    }
+
+    /**
+	 * checks if the iterator is valid
+	 * @return boolean is the iterator valid
+     */
+    public function valid()
+    {
+        return 0 <= $this->_sourceIndex && $this->_sourceIndex < $this->count();
+    }
+    
+    /**
+     * Allow name value pairs to be added to the ArrayCollection
+     * @param mixed name pair
+     * @param mixed value pair
+     */
+    public function __set($name, $value)
+    {
+        if($name == 'externalizedData') {
+            $this->loadSource($value);
+        } else {
+            $this->_source[] = array($name => $value); 
+        }
+    }
+    
+    /**
+     * Builds an Array into an ArrayCollection and handles Zend_DB_Table
+     * 
+     * @param array data to be added to the collection
+     * @todo Should fire an exception if the data is not an array
+     */
+    private function loadSource($data)
+    {
+        if (is_array($data)) {
+            foreach($data as $row) {
+                if ($row instanceof Zend_Db_Table_Row_Abstract) {
+                    $row = $row->toArray();
+                }
+                if (is_object($row)) {
+                    $this->_source[] = $row;
+                } else if (is_array($row)) {
+                    $source_row = array();
+                    foreach($row as $colkey => $colvalue) {
+                        $source_row[$colkey] = $colvalue;
+                    }
+                    if ($source_row) {
+                        $this->_source[] = $source_row;
+                    }
+                }
+            }
+        }
+    }
+}