/**

  * Copyright 2005-2011 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.opensource.org/licenses/ecl2.php

  *

  * 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.rice.ken.service;

 import java.util.Collection;

 import org.kuali.rice.ken.bo.UserChannelSubscription;

 /**

  * Service for accessing user preferences in the KEN system.{@link UserPreference}

  * @author Kuali Rice Team (rice.collab@kuali.org)

  */

 public interface UserPreferenceService {

     /**

      * This method retrieves all of the current channel subscriptions for a user.

      * @param userid

      * @return Collection

      */

     public Collection<UserChannelSubscription> getCurrentSubscriptions(String userid);

     /**

      * This method retrieves the UserChannelSubscription instance given the two unique keys that are 

      * passed in.

      * @param channelid

      * @param userid

      * @return UserChannelSubscription

      */

     public UserChannelSubscription getSubscription(String channelid, String userid);

     /**

      * This method will add a channel subscription into the system.

      * @param userChannelSubscription

      */

     public void subscribeToChannel(UserChannelSubscription userChannelSubscription);

     /**

      * This method will remove a channel subscription from the system.

      * @param userChannelSubscription

      */

     public void unsubscribeFromChannel(UserChannelSubscription userChannelSubscription);

 }