Java tutorial
/** * Copyright 2012 Nuvola Inc. * * 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. */ package com.gsr.myschool.server.repos.spec; import com.google.common.base.Strings; import com.gsr.myschool.common.shared.type.Authority; import com.gsr.myschool.server.business.User; import org.springframework.data.jpa.domain.Specification; import javax.persistence.criteria.CriteriaBuilder; import javax.persistence.criteria.CriteriaQuery; import javax.persistence.criteria.Predicate; import javax.persistence.criteria.Root; public class UserSpec { public static Specification<User> firstnameLike(final String name) { return new Specification<User>() { @Override public Predicate toPredicate(Root<User> userRoot, CriteriaQuery<?> query, CriteriaBuilder cb) { String likePattern = Strings.isNullOrEmpty(name) ? "%" : "%" + name + "%"; return cb.like(userRoot.<String>get("firstName"), likePattern); } }; } public static Specification<User> lastnameLike(final String name) { return new Specification<User>() { @Override public Predicate toPredicate(Root<User> userRoot, CriteriaQuery<?> query, CriteriaBuilder cb) { String likePattern = Strings.isNullOrEmpty(name) ? "%" : "%" + name + "%"; return cb.like(userRoot.<String>get("lastName"), likePattern); } }; } public static Specification<User> emailLike(final String mail) { return new Specification<User>() { @Override public Predicate toPredicate(Root<User> userRoot, CriteriaQuery<?> query, CriteriaBuilder cb) { String likePattern = Strings.isNullOrEmpty(mail) ? "%" : "%" + mail + "%"; return cb.like(userRoot.<String>get("email"), likePattern); } }; } public static Specification<User> isVip() { return new Specification<User>() { @Override public Predicate toPredicate(Root<User> userRoot, CriteriaQuery<?> query, CriteriaBuilder cb) { return cb.equal(userRoot.<Authority>get("authority"), Authority.ROLE_USER_VIP); } }; } }