Java tutorial
/** * The MIT License * Copyright (c) 2014 Nick Guletskii * * 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 org.ng200.openolympus.validation; import java.util.Date; import org.ng200.openolympus.dto.ContestDto; import org.ng200.openolympus.repositories.ContestRepository; import org.ng200.openolympus.services.ContestService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Component; import org.springframework.validation.Errors; @Component public class ContestDtoValidator { @Autowired private ContestRepository contestRepository; @Autowired private ContestService contestService; public void validate(final ContestDto contest, final Errors errors) { if (errors.hasErrors()) { return; } final Date start = contest.getStartTime(); final Date end = Date .from(contest.getStartTime().toInstant().plusMillis(contest.getDuration() * 1000 * 60)); if (this.contestService.intersects(start, end) != null) { errors.rejectValue("startTime", "", "contest.add.form.errors.contestIntersects"); } } }