/**

  * Copyright 2010 The Kuali Foundation Licensed under the

  * Educational Community License, Version 2.0 (the "License"); you may

  * not use this file except in compliance with the License. You may

  * obtain a copy of the License at

  *

  * http://www.osedu.org/licenses/ECL-2.0

  *

  * Unless required by applicable law or agreed to in writing,

  * software distributed under the License is distributed on an "AS IS"

  * BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express

  * or implied. See the License for the specific language governing

  * permissions and limitations under the License.

  */

 package org.kuali.student.common.ui.client.mvc;

 import com.google.gwt.event.shared.HandlerRegistration;

 /**

  * Model object used as a container for the model state. Sources ModelChangeEvents used for tracking the model state.

  * 

  * @author Kuali Student Team

  * @param <T>

  *            the type of model object to be contained within the model

  */

 public interface Model {

     /**

      * Adds a ModelChangeHandler that will be invoked for ModelChangeEvents

      * 

      * @param handler

      *            the handler to add

      * @return HandlerRegistration that can be used to unregister the handler later

      */

     public HandlerRegistration addModelChangeHandler(ModelChangeHandler handler);

 }