Java tutorial
/* * The MIT License (MIT) * * Copyright (c) 2013 Brien L. Wheeler (brienwheeler@yahoo.com) * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ package com.brienwheeler.svc.usergroups.impl; import javax.persistence.Query; import org.springframework.transaction.annotation.Propagation; import org.springframework.transaction.annotation.Transactional; import com.brienwheeler.lib.db.dao.DeletableDaoBase; import com.brienwheeler.svc.usergroups.domain.UserGroup; public class UserGroupDao extends DeletableDaoBase<UserGroup> implements IUserGroupDao { @Override public Class<UserGroup> getEntityClass() { return UserGroup.class; } @Override @Transactional(readOnly = true, propagation = Propagation.SUPPORTS) public UserGroup findByNameAndType(String groupName, String groupType) { Query query = entityManager .createQuery("from UserGroup where groupName = :groupName and groupType = :groupType"); query.setParameter("groupName", groupName); query.setParameter("groupType", groupType); return getSingleResultOrNull(query); } }