001 // Copyright 2011 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.jpa; 016 017 import org.apache.tapestry5.internal.services.AbstractSessionPersistentFieldStrategy; 018 import org.apache.tapestry5.jpa.EntityManagerManager; 019 import org.apache.tapestry5.services.Request; 020 021 /** 022 * Persists JPA entities by storing their id in the session. 023 */ 024 public class EntityPersistentFieldStrategy extends AbstractSessionPersistentFieldStrategy 025 { 026 private final EntityManagerManager entityManagerManager; 027 028 public EntityPersistentFieldStrategy(final EntityManagerManager entityManagerManager, 029 final Request request) 030 { 031 super("entity:", request); 032 033 this.entityManagerManager = entityManagerManager; 034 } 035 036 @Override 037 protected Object convertApplicationValueToPersisted(final Object newValue) 038 { 039 return JpaInternalUtils.convertApplicationValueToPersisted(entityManagerManager, newValue); 040 } 041 042 @Override 043 protected Object convertPersistedToApplicationValue(final Object persistedValue) 044 { 045 final PersistedEntity persisted = (PersistedEntity) persistedValue; 046 047 return persisted.restore(entityManagerManager); 048 } 049 }