Java tutorial
/** * Licensed to the Apache Software Foundation (ASF) under one * or more contributor license agreements. See the NOTICE file * distributed with this work for additional information * regarding copyright ownership. The ASF licenses this file * to you 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.apache.cxf.fediz.service.idp.service.jpa; import java.util.ArrayList; import java.util.List; import javax.persistence.EntityManager; import javax.persistence.PersistenceContext; import javax.persistence.Query; import org.apache.cxf.fediz.service.idp.domain.Entitlement; import org.apache.cxf.fediz.service.idp.service.EntitlementDAO; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.stereotype.Repository; import org.springframework.transaction.annotation.Transactional; @Repository @Transactional public class EntitlementDAOJPAImpl implements EntitlementDAO { private static final Logger LOG = LoggerFactory.getLogger(EntitlementDAOJPAImpl.class); private EntityManager em; @PersistenceContext public void setEntityManager(EntityManager entityManager) { this.em = entityManager; } @Override public List<Entitlement> getEntitlements(int start, int size) { List<Entitlement> list = new ArrayList<Entitlement>(); Query query = null; query = em.createQuery("select e from Entitlement e"); //@SuppressWarnings("rawtypes") List entitlementEntities = query.setFirstResult(start).setMaxResults(size).getResultList(); for (Object obj : entitlementEntities) { EntitlementEntity entity = (EntitlementEntity) obj; list.add(entity2domain(entity)); } return list; } @Override public Entitlement addEntitlement(Entitlement entitlement) { EntitlementEntity entity = new EntitlementEntity(); domain2entity(entitlement, entity); em.persist(entity); LOG.debug("Entitlement '{}' added", entitlement.getName()); return entity2domain(entity); } @Override public Entitlement getEntitlement(String name) { return entity2domain(getEntitlementEntity(name, em)); } @Override public void updateEntitlement(String name, Entitlement entitlement) { Query query = null; query = em.createQuery("select e from Entitlement e where e.name=:name"); query.setParameter("name", name); //@SuppressWarnings("rawtypes") EntitlementEntity entitlementEntity = (EntitlementEntity) query.getSingleResult(); domain2entity(entitlement, entitlementEntity); LOG.debug("Entitlement '{}' added", entitlement.getName()); em.persist(entitlementEntity); } @Override public void deleteEntitlement(String name) { Query query = null; query = em.createQuery("select e from Entitlement e where e.name=:name"); query.setParameter("name", name); //@SuppressWarnings("rawtypes") Object entitlementObj = query.getSingleResult(); em.remove(entitlementObj); LOG.debug("Entitlement '{}' deleted", name); } static EntitlementEntity getEntitlementEntity(String name, EntityManager em) { Query query = null; query = em.createQuery("select e from Entitlement e where e.name=:name"); query.setParameter("name", name); //@SuppressWarnings("rawtypes") return (EntitlementEntity) query.getSingleResult(); } public static void domain2entity(Entitlement entitlement, EntitlementEntity entity) { //The ID must not be updated if the entity has got an id already (update case) if (entitlement.getId() > 0) { entity.setId(entitlement.getId()); } //property 'internal' can't be changed, default is false entity.setName(entitlement.getName()); entity.setDescription(entitlement.getDescription()); } public static Entitlement entity2domain(EntitlementEntity entity) { Entitlement entitlement = new Entitlement(); entitlement.setId(entity.getId()); entitlement.setName(entity.getName()); entitlement.setDescription(entity.getDescription()); entitlement.setInternal(entity.isInternal()); return entitlement; } }