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.net.URI; 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.Claim; import org.apache.cxf.fediz.service.idp.service.ClaimDAO; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.stereotype.Repository; import org.springframework.transaction.annotation.Transactional; @Repository @Transactional public class ClaimDAOJPAImpl implements ClaimDAO { private static final Logger LOG = LoggerFactory.getLogger(ClaimDAOJPAImpl.class); private EntityManager em; @PersistenceContext public void setEntityManager(EntityManager entityManager) { this.em = entityManager; } @Override public List<Claim> getClaims(int start, int size) { List<Claim> list = new ArrayList<Claim>(); Query query = null; query = em.createQuery("select c from Claim c"); //@SuppressWarnings("rawtypes") List claimEntities = query.setFirstResult(start).setMaxResults(size).getResultList(); for (Object obj : claimEntities) { ClaimEntity entity = (ClaimEntity) obj; list.add(entity2domain(entity)); } return list; } @Override public Claim addClaim(Claim claim) { ClaimEntity entity = new ClaimEntity(); domain2entity(claim, entity); em.persist(entity); LOG.debug("Claim '{}' added", claim.getClaimType()); return entity2domain(entity); } @Override public Claim getClaim(String claimType) { return entity2domain(getClaimEntity(claimType, em)); } @Override public void updateClaim(String claimType, Claim claim) { Query query = null; query = em.createQuery("select c from Claim c where c.claimtype=:claimtype"); query.setParameter("claimtype", claimType); //@SuppressWarnings("rawtypes") ClaimEntity claimEntity = (ClaimEntity) query.getSingleResult(); domain2entity(claim, claimEntity); LOG.debug("Claim '{}' added", claim.getClaimType()); em.persist(claimEntity); } @Override public void deleteClaim(String claimType) { Query query = null; query = em.createQuery("select c from Claim c where c.claimType=:claimtype"); query.setParameter("claimtype", claimType); //@SuppressWarnings("rawtypes") Object claimObj = query.getSingleResult(); em.remove(claimObj); LOG.debug("Claim '{}' deleted", claimType); } static ClaimEntity getClaimEntity(String claimType, EntityManager em) { Query query = null; query = em.createQuery("select c from Claim c where c.claimType=:claimtype"); query.setParameter("claimtype", claimType); //@SuppressWarnings("rawtypes") return (ClaimEntity) query.getSingleResult(); } public static void domain2entity(Claim claim, ClaimEntity entity) { //The ID must not be updated if the entity has got an id already (update case) if (claim.getId() > 0) { entity.setId(claim.getId()); } entity.setClaimType(claim.getClaimType().toString()); entity.setDisplayName(claim.getDisplayName()); entity.setDescription(claim.getDescription()); } public static Claim entity2domain(ClaimEntity entity) { Claim claim = new Claim(); claim.setId(entity.getId()); claim.setClaimType(URI.create(entity.getClaimType())); claim.setDisplayName(entity.getDisplayName()); claim.setDescription(entity.getDescription()); return claim; } }