Java tutorial
/* * Copyright (c) 2012 Brown Bag Consulting. * This file is part of the ExpressUI project. * Author: Juan Osuna * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License Version 3 * as published by the Free Software Foundation with the addition of the * following permission added to Section 15 as permitted in Section 7(a): * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY * Brown Bag Consulting, Brown Bag Consulting DISCLAIMS THE WARRANTY OF * NON INFRINGEMENT OF THIRD PARTY RIGHTS. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU Affero General Public License for more details. * * You should have received a copy of the GNU Affero General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * * The interactive user interfaces in modified source and object code versions * of this program must display Appropriate Legal Notices, as required under * Section 5 of the GNU Affero General Public License. * * You can be released from the requirements of the license by purchasing * a commercial license. Buying such a license is mandatory as soon as you * develop commercial activities involving the ExpressUI software without * disclosing the source code of your own applications. These activities * include: offering paid services to customers as an ASP, providing * services from a web application, shipping ExpressUI with a closed * source product. * * For more information, please contact Brown Bag Consulting at this * address: juan@brownbagconsulting.com. */ package com.expressui.sample.dao.query; import com.expressui.core.dao.query.StructuredEntityQuery; import com.expressui.sample.entity.Contact; import org.springframework.context.annotation.Scope; import org.springframework.stereotype.Component; import javax.persistence.criteria.Fetch; import javax.persistence.criteria.JoinType; import javax.persistence.criteria.Path; import javax.persistence.criteria.Root; import static org.springframework.beans.factory.config.BeanDefinition.SCOPE_PROTOTYPE; @Component @Scope(SCOPE_PROTOTYPE) public class RecentContactsQuery extends StructuredEntityQuery<Contact> { @Override public Path buildOrderBy(Root<Contact> contact) { if (getOrderByPropertyId().equals("mailingAddress.country")) { return contact.join("mailingAddress", JoinType.LEFT).join("country", JoinType.LEFT); } else if (getOrderByPropertyId().equals("mailingAddress.street")) { return contact.join("mailingAddress", JoinType.LEFT).get("street"); } else if (getOrderByPropertyId().equals("mailingAddress.city")) { return contact.join("mailingAddress", JoinType.LEFT).get("city"); } else if (getOrderByPropertyId().equals("mailingAddress.state.code")) { return contact.join("mailingAddress", JoinType.LEFT).join("state", JoinType.LEFT).get("code"); } else { return null; } } @Override public void addFetchJoins(Root<Contact> contact) { Fetch mailingAddress = contact.fetch("mailingAddress", JoinType.LEFT); mailingAddress.fetch("state", JoinType.LEFT); mailingAddress.fetch("country", JoinType.LEFT); } @Override public String toString() { return "RecentContactsQuery{}"; } }