Java tutorial
/** * The MIT License * Copyright (c) 2014-2015 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.controller.contest; import java.security.Principal; import java.util.Date; import java.util.HashSet; import java.util.Set; import org.ng200.openolympus.SecurityExpressionConstants; import org.ng200.openolympus.model.Contest; import org.ng200.openolympus.model.Task; import org.ng200.openolympus.model.User; import org.ng200.openolympus.model.views.UnprivilegedView; import org.ng200.openolympus.services.ContestService; import org.ng200.openolympus.services.SecurityService; import org.ng200.openolympus.services.TaskService; import org.ng200.openolympus.services.UserService; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.cache.annotation.Cacheable; import org.springframework.security.access.prepost.PreAuthorize; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.RestController; import com.fasterxml.jackson.annotation.JsonView; @RestController public class ContestViewController { private static final Logger logger = LoggerFactory.getLogger(ContestViewController.class); @Autowired private SecurityService securityService; @Autowired private TaskService taskService; @Autowired private ContestService contestService; @Autowired private UserService userService; public static class ContestDTO { private String name; private TimingDTO timings; private Set<Task> tasks; public String getName() { return name; } public void setName(String name) { this.name = name; } public TimingDTO getTimings() { return timings; } public void setTimings(TimingDTO timings) { this.timings = timings; } public Set<Task> getTasks() { return tasks; } public void setTasks(Set<Task> tasks) { this.tasks = tasks; } public ContestDTO(String name, TimingDTO timings, Set<Task> tasks) { super(); this.name = name; this.timings = timings; this.tasks = tasks; } } @PreAuthorize(SecurityExpressionConstants.IS_ADMIN + SecurityExpressionConstants.OR + '(' + SecurityExpressionConstants.IS_USER + SecurityExpressionConstants.AND + SecurityExpressionConstants.THIS_CONTEST_IN_PROGRESS_FOR_USER + ')') @Cacheable(value = "contests", key = "#contest.id", unless = "#result == null") @RequestMapping(value = "/api/contest/{contest}", method = RequestMethod.GET) @JsonView(UnprivilegedView.class) public ContestDTO showContestHub(@PathVariable(value = "contest") final Contest contest, final Principal principal) { User user = userService.getUserByUsername(principal.getName()); Set<Task> tasks = new HashSet<Task>(contest.getTasks()); return new ContestDTO(contest.getName(), new TimingDTO(contest.getStartTime(), Date.from(contest.getStartTime().toInstant().plus(contest.getDuration())), contestService.getContestEndTimeForUser(contest, user)), tasks); } public static class TimingDTO { private Date startTime; private Date endTime; private Date endTimeIncludingTimeExtensions; public Date getStartTime() { return startTime; } public void setStartTime(Date startTime) { this.startTime = startTime; } public Date getEndTime() { return endTime; } public void setEndTime(Date endTime) { this.endTime = endTime; } public Date getEndTimeIncludingTimeExtensions() { return endTimeIncludingTimeExtensions; } public void setEndTimeIncludingTimeExtensions(Date endTimeIncludingTimeExtensions) { this.endTimeIncludingTimeExtensions = endTimeIncludingTimeExtensions; } public TimingDTO(Date startTime, Date endTime, Date endTimeIncludingTimeExtensions) { this.startTime = startTime; this.endTime = endTime; this.endTimeIncludingTimeExtensions = endTimeIncludingTimeExtensions; } } }