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.controller.task; import java.io.File; import java.io.IOException; import java.security.Principal; import java.text.MessageFormat; import java.time.Instant; import java.util.Date; import java.util.Locale; import java.util.UUID; import javax.servlet.http.HttpServletRequest; import javax.validation.Valid; import org.apache.commons.compress.archivers.ArchiveException; import org.ng200.openolympus.Assertions; import org.ng200.openolympus.StorageSpace; import org.ng200.openolympus.controller.ContestRestrictedController; import org.ng200.openolympus.dto.SolutionDto; import org.ng200.openolympus.model.Solution; import org.ng200.openolympus.model.Task; import org.ng200.openolympus.model.User; import org.ng200.openolympus.repositories.SolutionRepository; import org.ng200.openolympus.repositories.TaskRepository; import org.ng200.openolympus.repositories.UserRepository; import org.ng200.openolympus.services.TestingService; import org.ng200.openolympus.validation.SolutionDtoValidator; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.propertyeditors.StringTrimmerEditor; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.validation.BindingResult; import org.springframework.web.bind.ServletRequestDataBinder; import org.springframework.web.bind.annotation.InitBinder; import org.springframework.web.bind.annotation.PathVariable; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.thymeleaf.spring4.view.ThymeleafViewResolver; @Controller @RequestMapping(value = "/task/{task}") public class TaskViewController extends ContestRestrictedController { private static final String TASK_DESCRIPTION_PATH_TEMPLATE = "tasks/descriptions/{0}"; private static final String SOLUTION_PATH_TEMPLATE = "{0}/solutions/{1}/{2}"; @Autowired private TaskRepository taskRepository; @Autowired private ThymeleafViewResolver thymeleafViewResolver; @Autowired private SolutionDtoValidator solutionDtoValidator; @Autowired private SolutionRepository solutionRepository; @Autowired private TestingService testingService; @Autowired private UserRepository userRepository; @InitBinder protected void initBinder(final HttpServletRequest request, final ServletRequestDataBinder binder) throws Exception { binder.registerCustomEditor(String.class, new StringTrimmerEditor(true)); } @RequestMapping(method = RequestMethod.GET) public String showTaskView(@PathVariable(value = "task") final Task task, final Model model, final Locale locale, final SolutionDto solutionDto, final Principal principal) { Assertions.resourceExists(task); this.assertSuperuserOrTaskAllowed(principal, task); model.addAttribute("taskDescriptionUUID", task.getDescriptionFile()); model.addAttribute("taskDescriptionURI", MessageFormat.format(TaskViewController.TASK_DESCRIPTION_PATH_TEMPLATE, task.getDescriptionFile())); model.addAttribute("localisedDescriptionFragment", "taskDescription_" + locale.getLanguage()); model.addAttribute("task", task); return "tasks/task"; } @RequestMapping(method = RequestMethod.POST) public String submitSolution(final HttpServletRequest request, final Model model, final Locale locale, @PathVariable("task") final Task task, final Principal principal, @Valid final SolutionDto solutionDto, final BindingResult bindingResult) throws IllegalStateException, IOException, ArchiveException { Assertions.resourceExists(task); this.assertSuperuserOrTaskAllowed(principal, task); final User user = this.userRepository.findByUsername(principal.getName()); this.solutionDtoValidator.validate(solutionDto, bindingResult); if (bindingResult.hasErrors()) { model.addAttribute("taskDescriptionUUID", task.getDescriptionFile()); model.addAttribute("taskDescriptionURI", MessageFormat .format(TaskViewController.TASK_DESCRIPTION_PATH_TEMPLATE, task.getDescriptionFile())); model.addAttribute("localisedDescriptionFragment", "taskDescription_" + locale.getLanguage()); model.addAttribute("task", task); return "tasks/task"; } final UUID uuid = UUID.randomUUID(); final String solutionPath = MessageFormat.format(TaskViewController.SOLUTION_PATH_TEMPLATE, StorageSpace.STORAGE_PREFIX, uuid.toString(), solutionDto.getTaskFile().getOriginalFilename().replaceAll("[^a-zA-Z0-9-\\._]", "")); final File solutionFile = new File(solutionPath); solutionFile.getParentFile().mkdirs(); solutionDto.getTaskFile().transferTo(solutionFile); Solution solution = new Solution(task, user, solutionFile.getAbsolutePath(), Date.from(Instant.now())); solution = this.solutionRepository.save(solution); this.testingService.testSolutionOnAllTests(solution); return MessageFormat.format("redirect:/solution?id={0}", Long.toString(solution.getId())); } }