Rename 'kohana' to 'system' to conform to the Kohana filesystem layout. I'm comfortable with us not clearly drawing the distinction about the fact that it's Kohana.

system/libraries/ORM_Iterator.php

@@ -0,0 +1,228 @@
+<?php defined('SYSPATH') OR die('No direct access allowed.');
+/**
+* Object Relational Mapping (ORM) result iterator.
+*
+* $Id: ORM_Iterator.php 3769 2008-12-15 00:48:56Z zombor $
+*
+* @package    ORM
+* @author     Kohana Team
+* @copyright  (c) 2007-2008 Kohana Team
+* @license    http://kohanaphp.com/license.html
+*/
+class ORM_Iterator_Core implements Iterator, ArrayAccess, Countable {
+
+	// Class attributes
+	protected $class_name;
+	protected $primary_key;
+	protected $primary_val;
+
+	// Database result object
+	protected $result;
+
+	public function __construct(ORM $model, Database_Result $result)
+	{
+		// Class attributes
+		$this->class_name  = get_class($model);
+		$this->primary_key = $model->primary_key;
+		$this->primary_val = $model->primary_val;
+
+		// Database result
+		$this->result = $result->result(TRUE);
+	}
+
+	/**
+	 * Returns an array of the results as ORM objects.
+	 *
+	 * @return  array
+	 */
+	public function as_array()
+	{
+		$array = array();
+
+		if ($results = $this->result->result_array())
+		{
+			// Import class name
+			$class = $this->class_name;
+
+			foreach ($results as $obj)
+			{
+				$array[] = new $class($obj);
+			}
+		}
+
+		return $array;
+	}
+
+	/**
+	 * Return an array of all of the primary keys for this object.
+	 *
+	 * @return  array
+	 */
+	public function primary_key_array()
+	{
+		$ids = array();
+		foreach ($this->result as $row)
+		{
+			$ids[] = $row->{$this->primary_key};
+		}
+		return $ids;
+	}
+
+	/**
+	 * Create a key/value array from the results.
+	 *
+	 * @param   string  key column
+	 * @param   string  value column
+	 * @return  array
+	 */
+	public function select_list($key = NULL, $val = NULL)
+	{
+		if ($key === NULL)
+		{
+			// Use the default key
+			$key = $this->primary_key;
+		}
+
+		if ($val === NULL)
+		{
+			// Use the default value
+			$val = $this->primary_val;
+		}
+
+		$array = array();
+		foreach ($this->result->result_array() as $row)
+		{
+			$array[$row->$key] = $row->$val;
+		}
+		return $array;
+	}
+
+	/**
+	 * Return a range of offsets.
+	 *
+	 * @param   integer  start
+	 * @param   integer  end
+	 * @return  array
+	 */
+	public function range($start, $end)
+	{
+		// Array of objects
+		$array = array();
+
+		if ($this->result->offsetExists($start))
+		{
+			// Import the class name
+			$class = $this->class_name;
+
+			// Set the end offset
+			$end = $this->result->offsetExists($end) ? $end : $this->count();
+
+			for ($i = $start; $i < $end; $i++)
+			{
+				// Insert each object in the range
+				$array[] = new $class($this->result->offsetGet($i));
+			}
+		}
+
+		return $array;
+	}
+
+	/**
+	 * Countable: count
+	 */
+	public function count()
+	{
+		return $this->result->count();
+	}
+
+	/**
+	 * Iterator: current
+	 */
+	public function current()
+	{
+		if ($row = $this->result->current())
+		{
+			// Import class name
+			$class = $this->class_name;
+
+			$row = new $class($row);
+		}
+
+		return $row;
+	}
+
+	/**
+	 * Iterator: key
+	 */
+	public function key()
+	{
+		return $this->result->key();
+	}
+
+	/**
+	 * Iterator: next
+	 */
+	public function next()
+	{
+		return $this->result->next();
+	}
+
+	/**
+	 * Iterator: rewind
+	 */
+	public function rewind()
+	{
+		$this->result->rewind();
+	}
+
+	/**
+	 * Iterator: valid
+	 */
+	public function valid()
+	{
+		return $this->result->valid();
+	}
+
+	/**
+	 * ArrayAccess: offsetExists
+	 */
+	public function offsetExists($offset)
+	{
+		return $this->result->offsetExists($offset);
+	}
+
+	/**
+	 * ArrayAccess: offsetGet
+	 */
+	public function offsetGet($offset)
+	{
+		if ($this->result->offsetExists($offset))
+		{
+			// Import class name
+			$class = $this->class_name;
+
+			return new $class($this->result->offsetGet($offset));
+		}
+	}
+
+	/**
+	 * ArrayAccess: offsetSet
+	 *
+	 * @throws  Kohana_Database_Exception
+	 */
+	public function offsetSet($offset, $value)
+	{
+		throw new Kohana_Database_Exception('database.result_read_only');
+	}
+
+	/**
+	 * ArrayAccess: offsetUnset
+	 *
+	 * @throws  Kohana_Database_Exception
+	 */
+	public function offsetUnset($offset)
+	{
+		throw new Kohana_Database_Exception('database.result_read_only');
+	}
+
+} // End ORM Iterator