package com.thinkbiganalytics.jpa;
/*-
* #%L
* thinkbig-commons-jpa
* %%
* Copyright (C) 2017 ThinkBig Analytics
* %%
* 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.
* #L%
*/
import java.io.Serializable;
import java.util.List;
import javax.persistence.EntityManager;
/**
*/
public abstract class AbstractJpaProvider<T, PK extends Serializable> implements BaseJpaProvider<T, PK> {
protected Class<T> entityClass;
public AbstractJpaProvider() {
this.entityClass = (Class<T>) getEntityClass();
}
//@PersistenceContext
//@Inject
//@Qualifier("metadataEntityManager")
//protected EntityManager entityManager;
public abstract Class<? extends T> getEntityClass();
public abstract EntityManager getEntityManager();
@Override
public T create(T t) {
this.getEntityManager().persist(t);
return t;
}
@Override
public T findById(PK id) {
return this.getEntityManager().find(entityClass, id);
}
@Override
public List<T> findAll() {
return this.getEntityManager().createQuery("from " + entityClass.getName()).getResultList();
}
@Override
public T update(T t) {
return this.getEntityManager().merge(t);
}
@Override
public void delete(T t) {
t = this.getEntityManager().merge(t);
this.getEntityManager().remove(t);
}
@Override
public void deleteById(PK id) {
T t = this.findById(id);
if (id != null) {
delete(t);
}
}
}