001    // Copyright 2008, 2010 The Apache Software Foundation
002    //
003    // Licensed under the Apache License, Version 2.0 (the "License");
004    // you may not use this file except in compliance with the License.
005    // You may obtain a copy of the License at
006    //
007    // http://www.apache.org/licenses/LICENSE-2.0
008    //
009    // Unless required by applicable law or agreed to in writing, software
010    // distributed under the License is distributed on an "AS IS" BASIS,
011    // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012    // See the License for the specific language governing permissions and
013    // limitations under the License.
014    
015    package org.apache.tapestry5.internal.hibernate;
016    
017    import org.apache.tapestry5.annotations.ImmutableSessionPersistedObject;
018    import org.hibernate.Session;
019    
020    import java.io.Serializable;
021    
022    /**
023     * Encapsulates a Hibernate entity name with an entity id.
024     */
025    @ImmutableSessionPersistedObject
026    public class PersistedEntity implements Serializable
027    {
028        private static final long serialVersionUID = 897120520279686518L;
029    
030        private final String entityName;
031    
032        private final Serializable id;
033    
034        public PersistedEntity(String entityName, Serializable id)
035        {
036            this.entityName = entityName;
037            this.id = id;
038        }
039    
040        public Object restore(Session session)
041        {
042            try
043            {
044                return session.get(entityName, id);
045            }
046            catch (Exception ex)
047            {
048                throw new RuntimeException(HibernateMessages.sessionPersistedEntityLoadFailure(entityName, id, ex));
049            }
050        }
051    
052        @Override
053        public String toString()
054        {
055            return String.format("<PersistedEntity: %s(%s)>", entityName, id);
056        }
057    }