/**

  * 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.server.applicationstate.dao;

 import java.util.Collection;

 import java.util.List;

 import org.kuali.student.common.ui.server.applicationstate.entity.ApplicationState;

 import org.kuali.student.core.dao.CrudDao;

 import org.kuali.student.core.dao.SearchableDao;

 import org.kuali.student.core.exceptions.AlreadyExistsException;

 import org.kuali.student.core.exceptions.DoesNotExistException;

 /**

  * This data access interface stores the GUI (page, section, widget, etc.) 

  * application states as key value pairs in a database.

  */

 public interface ApplicationStateDao extends CrudDao, SearchableDao {

         /**

          * Gets a list of application states by 

          * <code>applicationId</code>, <code>referenceKey</code>,  

          * <code>referenceType</code> and <code>userId</code>.

          * 

          * @param applicationId Application id

          * @param referenceKey Reference key

          * @param referenceType Reference type

          * @param userId User id

          * @return An application state

          * @throws DoesNotExistException Thrown if application state does not exist

          */

         public ApplicationState getApplicationState(String applicationId, String referenceKey, String referenceType, String userId) throws DoesNotExistException;

         /**

          * Gets a list of application states by 

          * <code>applicationId</code>, <code>referenceKey</code> and 

          * <code>referenceType</code>.

          * 

          * @param applicationId Application id

          * @param referenceKey Reference key

          * @param referenceType Reference type

          * @return A list of application states

          * @throws DoesNotExistException Thrown if application state does not exist

          */

         public ApplicationState getApplicationState(String applicationId, String referenceKey, String referenceType) throws DoesNotExistException;

         /**

          * Creates and returns an application state.

          * 

          * @param appState Application state

          * @return A new application state

          * @throws AlreadyExistsException Thrown if application state already exists

          */

         public ApplicationState createApplicationState(ApplicationState appState)

                 throws AlreadyExistsException;

         /**

          * Creates a collection of application states and returns their ids.

          * 

          * @param appStateList collection of application states

          * @return A list of newly created application state ids

          * @throws AlreadyExistsException Thrown if application state already exists

          */

         public List<String> createApplicationState(Collection<ApplicationState> appStates)

                 throws AlreadyExistsException;

 }