/*
* Copyright 2007 The Fornax Project Team, including the original
* author or authors.
*
* Licensed under the Apache 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.apache.org/licenses/LICENSE-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.sculptor.framework.accessimpl.jpa;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import javax.persistence.PersistenceException;
import org.sculptor.framework.accessapi.SaveAccess;
/**
* <p>
* Save an entity. Implementation of Access command for Update.
* </p>
* <p>
* Command design pattern.
* </p>
*/
public class JpaSaveAccessImpl<T> extends JpaAccessBase<T> implements SaveAccess<T> {
private T entity;
private T result;
private Collection<T> entities;
public JpaSaveAccessImpl() {
}
public JpaSaveAccessImpl(Class<T> persistentClass) {
setPersistentClass(persistentClass);
}
public T getEntity() {
return entity;
}
public void setEntity(T entity) {
this.entity = entity;
}
public Collection<T> getEntities() {
return entities;
}
public void setEntities(Collection<T> entities) {
this.entities = entities;
}
public T getResult() {
return result;
}
@Override
public void performExecute() throws PersistenceException {
if (entity != null) {
result = performMerge(entity);
}
if (entities != null) {
List<T> newInstances = new ArrayList<T>();
for (T each : getEntities()) {
newInstances.add(performMerge(each));
}
setEntities(newInstances);
}
}
protected T performMerge(T obj) {
if (getEntityManager().contains(obj)) {
return obj;
} else {
return getEntityManager().merge(obj);
}
}
}