001// Copyright 2008-2014 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
015package org.apache.tapestry5.internal.hibernate;
016
017import org.apache.tapestry5.annotations.ImmutableSessionPersistedObject;
018import org.apache.tapestry5.ioc.internal.util.InternalUtils;
019import org.hibernate.Session;
020
021import java.io.Serializable;
022
023/**
024 * Encapsulates a Hibernate entity name with an entity id.
025 */
026@ImmutableSessionPersistedObject
027public class PersistedEntity implements SessionRestorable
028{
029    private static final long serialVersionUID = 897120520279686518L;
030
031    private final String entityName;
032
033    private final Serializable id;
034
035    public PersistedEntity(String entityName, Serializable id)
036    {
037        assert InternalUtils.isNonBlank(entityName);
038        assert id != null;
039
040        this.entityName = entityName;
041        this.id = id;
042    }
043
044    @Override
045    public Object restoreWithSession(Session session)
046    {
047        try
048        {
049            return session.get(entityName, id);
050        } catch (Exception ex)
051        {
052            throw new RuntimeException(String.format("Failed to load session-persisted entity %s(%s): %s", entityName, id, ex),
053                    ex);
054        }
055    }
056
057    @Override
058    public String toString()
059    {
060        return String.format("<PersistedEntity: %s(%s)>", entityName, id);
061    }
062}