Added hasMethod() to Component and Object class

this allows implementing __call() in behaviors

See this forum topic for details:
http://www.yiiframework.com/forum/index.php/topic/46629-invoke-behavior-method-through-php-magic-method-call-dosent-work/

framework/yii/base/Component.php

@@ -298,6 +298,32 @@ class Component extends Object
 		return false;
 	}
 
+	/**
+	 * Returns a value indicating whether a method is defined.
+	 * A method is defined if:
+	 *
+	 * - the class has a method with the specified name
+	 * - an attached behavior has a method with the given name (when `$checkBehaviors` is true).
+	 *
+	 * @param string $name the property name
+	 * @param boolean $checkBehaviors whether to treat behaviors' methods as methods of this component
+	 * @return boolean whether the property is defined
+	 */
+	public function hasMethod($name, $checkBehaviors = true)
+	{
+		if (method_exists($this, $name)) {
+			return true;
+		} elseif ($checkBehaviors) {
+			$this->ensureBehaviors();
+			foreach ($this->_behaviors as $behavior) {
+				if ($behavior->hasMethod($name)) {
+					return true;
+				}
+			}
+		}
+		return false;
+	}
+
 	/**
 	 * Returns a list of behaviors that this component should behave as.
 	 *

framework/yii/base/Object.php

@@ -219,6 +219,19 @@ class Object implements Arrayable
 		return method_exists($this, 'set' . $name) || $checkVars && property_exists($this, $name);
 	}
 
+	/**
+	 * Returns a value indicating whether a method is defined.
+	 *
+	 * The default implementation is a call to php function `method_exists()`.
+	 * You may override this method when you implemented the php magic method `__call()`.
+	 * @param string $name the property name
+	 * @return boolean whether the property is defined
+	 */
+	public function hasMethod($name)
+	{
+		return method_exists($this, $name);
+	}
+
 	/**
 	 * Converts the object into an array.
 	 * The default implementation will return all public property values as an array.