finished Vector.

framework/base/Event.php

@@ -3,7 +3,7 @@
 namespace yii\base;
 
 /**
- * CEvent is the base class for all event classes.
+ * Event is the base class for all event classes.
  *
  * It encapsulates the parameters associated with an event.
  * The {@link sender} property describes who raises the event.
@@ -16,7 +16,7 @@ namespace yii\base;
  * @package system.base
  * @since 1.0
  */
-class CEvent extends CComponent
+class Event extends Component
 {
 	/**
 	 * @var object the sender of this event

framework/base/Exception.php

+<?php
+
+namespace yii\base;
+
+/**
+ * Exception class file.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright &copy; 2008-2011 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+/**
+ * Exception represents a generic exception for all purposes.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @version $Id: CException.php 2799 2011-01-01 19:31:13Z qiang.xue $
+ * @package system.base
+ * @since 1.0
+ */
+class Exception extends \Exception
+{
+}
+

framework/base/VectorIterator.php

+<?php
+/**
+ * VectorIterator class file.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright &copy; 2008-2012 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yii\base;
+
+/**
+ * VectorIterator implements the SPL `Iterator` interface for [[Vector]].
+ *
+ * It allows [[Vector]] to return a new iterator for data traversing purpose.
+ * You normally do not use this class directly.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @since 2.0
+ */
+class VectorIterator implements \Iterator
+{
+	/**
+	 * @var array the data to be iterated through
+	 */
+	private $_d;
+	/**
+	 * @var integer index of the current item
+	 */
+	private $_i;
+	/**
+	 * @var integer count of the data items
+	 */
+	private $_c;
+
+	/**
+	 * Constructor.
+	 * @param array $data the data to be iterated through
+	 */
+	public function __construct(&$data)
+	{
+		$this->_d = &$data;
+		$this->_i = 0;
+		$this->_c = count($this->_d);
+	}
+
+	/**
+	 * Rewinds the index of the current item.
+	 * This method is required by the SPL interface `Iterator`.
+	 */
+	public function rewind()
+	{
+		$this->_i = 0;
+	}
+
+	/**
+	 * Returns the key of the current item.
+	 * This method is required by the SPL interface `Iterator`.
+	 * @return integer the key of the current item
+	 */
+	public function key()
+	{
+		return $this->_i;
+	}
+
+	/**
+	 * Returns the current item.
+	 * This method is required by the SPL interface `Iterator`.
+	 * @return mixed the current item
+	 */
+	public function current()
+	{
+		return $this->_d[$this->_i];
+	}
+
+	/**
+	 * Moves the internal pointer to the next item.
+	 * This method is required by the SPL interface `Iterator`.
+	 */
+	public function next()
+	{
+		$this->_i++;
+	}
+
+	/**
+	 * Returns a value indicating whether there is an item at current position.
+	 * This method is required by the SPL interface `Iterator`.
+	 * @return boolean whether there is an item at current position.
+	 */
+	public function valid()
+	{
+		return $this->_i < $this->_c;
+	}
+}