Java tutorial
/* * #%L * BroadleafCommerce Menu * %% * Copyright (C) 2009 - 2014 Broadleaf Commerce * %% * 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% */ package org.broadleafcommerce.menu.dao; import org.broadleafcommerce.common.util.dao.TypedQueryBuilder; import org.broadleafcommerce.menu.domain.Menu; import org.broadleafcommerce.menu.domain.MenuImpl; import org.broadleafcommerce.menu.domain.MenuItem; import org.broadleafcommerce.menu.domain.MenuItemImpl; import org.hibernate.ejb.QueryHints; import org.springframework.stereotype.Repository; import java.util.List; import javax.persistence.EntityManager; import javax.persistence.PersistenceContext; import javax.persistence.TypedQuery; @Repository("blMenuDao") public class MenuDaoImpl implements MenuDao { @PersistenceContext(unitName = "blPU") protected EntityManager em; @Override public List<Menu> readAllMenus() { TypedQuery<Menu> q = new TypedQueryBuilder<Menu>(Menu.class, "m").toQuery(em); return q.getResultList(); } @Override public List<MenuItem> readAllMenuItems() { TypedQuery<MenuItem> q = new TypedQueryBuilder<MenuItem>(MenuItem.class, "mi").toQuery(em); return q.getResultList(); } @Override public Menu readMenuById(Long menuId) { return em.find(MenuImpl.class, menuId); } @Override public MenuItem readMenuItemById(Long menuItemId) { return em.find(MenuItemImpl.class, menuItemId); } @Override public Menu readMenuByName(String menuName) { TypedQuery<Menu> query = em.createNamedQuery("BC_READ_MENU_BY_NAME", Menu.class); query.setParameter("menuName", menuName); query.setHint(QueryHints.HINT_CACHEABLE, true); query.setHint(QueryHints.HINT_CACHE_REGION, "query.Cms"); List<Menu> results = query.getResultList(); if (!results.isEmpty()) { return results.get(0); } else { return null; } } @Override public Menu saveMenu(Menu menu) { return em.merge(menu); } @Override public MenuItem saveMenuItem(MenuItem menuItem) { return em.merge(menuItem); } }