Java tutorial
/** * This file is part of D.A.L.G.S. * * D.A.L.G.S is free software: you can redistribute it and/or modify * it under the terms of the GNU Affero General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * D.A.L.G.S 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 D.A.L.G.S. If not, see <http://www.gnu.org/licenses/>. */ package es.ucm.fdi.dalgs.degree.web; import java.io.IOException; import java.util.HashMap; import java.util.Locale; import java.util.Map; import javax.servlet.ServletException; import javax.servlet.http.HttpServletResponse; import javax.validation.Valid; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.validation.BindingResult; import org.springframework.validation.ObjectError; import org.springframework.web.bind.annotation.ModelAttribute; 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.RequestParam; import org.springframework.web.servlet.ModelAndView; import org.springframework.web.servlet.mvc.support.RedirectAttributes; import es.ucm.fdi.dalgs.classes.CharsetString; import es.ucm.fdi.dalgs.classes.ResultClass; import es.ucm.fdi.dalgs.classes.UploadForm; import es.ucm.fdi.dalgs.degree.service.DegreeService; import es.ucm.fdi.dalgs.domain.Degree; @Controller public class DegreeController { @Autowired private DegreeService serviceDegree; private Boolean showAll; public Boolean getShowAll() { return showAll; } public void setShowAll(Boolean showAll) { this.showAll = showAll; } @RequestMapping(value = "/degree/add.htm", method = RequestMethod.GET) public String addDegreeGET(Model model) { if (!model.containsAttribute("degree")) model.addAttribute("degree", new Degree()); model.addAttribute("valueButton", "Add"); model.addAttribute("typeform", "form.add"); return "degree/form"; } @RequestMapping(value = "/degree/add.htm", method = RequestMethod.POST, params = "Add") // Every Post have to return redirect public String addDegreePOST(@ModelAttribute("addDegree") Degree newDegree, BindingResult resultBinding, RedirectAttributes attr, Locale locale) { if (!resultBinding.hasErrors()) { ResultClass<Degree> result = serviceDegree.addDegree(newDegree, locale); if (!result.hasErrors()) return "redirect:/degree/page/0.htm?showAll=" + showAll; else { if (result.isElementDeleted()) { attr.addFlashAttribute("unDelete", result.isElementDeleted()); attr.addFlashAttribute("degree", result.getSingleElement()); } else attr.addFlashAttribute("degree", newDegree); attr.addFlashAttribute("errors", result.getErrorsList()); } } else { attr.addFlashAttribute("org.springframework.validation.BindingResult.degree", resultBinding); attr.addFlashAttribute("degree", newDegree); } return "redirect:/degree/add.htm"; } @RequestMapping(value = "/degree/add.htm", method = RequestMethod.POST, params = "Undelete") // Every Post have to return redirect public String undeleteDegree(@ModelAttribute("degree") Degree degree, BindingResult resultBinding, RedirectAttributes attr, Locale locale) { if (!resultBinding.hasErrors()) { ResultClass<Degree> result = serviceDegree.unDeleteDegree(degree, locale); if (!result.hasErrors()) { // if (created) attr.addFlashAttribute("degree", result.getSingleElement()); return "redirect:/degree/" + result.getSingleElement().getId() + "/modify.htm"; } else { attr.addFlashAttribute("degree", degree); if (result.isElementDeleted()) attr.addFlashAttribute("unDelete", true); attr.addFlashAttribute("errors", result.getErrorsList()); } } else { attr.addFlashAttribute("org.springframework.validation.BindingResult.degree", resultBinding); attr.addFlashAttribute("degree", degree); } return "redirect:/degree/add.htm"; } @RequestMapping(value = "/degree/{id_degree}/restore.htm") // Every Post have to return redirect public String restoreDegree(@PathVariable("id_degree") Long id_degree, Locale locale) { ResultClass<Degree> result = serviceDegree .unDeleteDegree(serviceDegree.getDegree(id_degree).getSingleElement(), locale); if (!result.hasErrors()) return "redirect:/degree/page/0.htm?showAll=" + showAll; else { return "redirect:/error.htm"; } } /** * Methods for listing degrees */ @RequestMapping(value = "/degree/page/{pageIndex}.htm") public ModelAndView degreesGET(@PathVariable("pageIndex") Integer pageIndex, @RequestParam(value = "showAll", defaultValue = "false") Boolean showAll) throws ServletException, IOException { Map<String, Object> model = new HashMap<String, Object>(); ResultClass<Degree> result = serviceDegree.getDegrees(pageIndex, showAll); ResultClass<Integer> numberOfPages = serviceDegree.numberOfPages(showAll); model.put("showAll", showAll); model.put("numberOfPages", numberOfPages.getSingleElement()); model.put("currentPage", pageIndex); model.put("degrees", result); setShowAll(showAll); return new ModelAndView("degree/list", "model", model); } /** * Methods for modify degrees */ @RequestMapping(value = "/degree/{degreeId}/modify.htm", method = RequestMethod.POST) public String modifyDegreePOST(@PathVariable("degreeId") Long id_degree, @ModelAttribute("degree") Degree modify, BindingResult resultBinding, RedirectAttributes attr, Locale locale) { if (!resultBinding.hasErrors()) { ResultClass<Boolean> result = serviceDegree.modifyDegree(modify, id_degree, locale); if (!result.hasErrors()) return "redirect:/degree/page/0.htm?showAll=" + showAll; else { attr.addFlashAttribute("errors", result.getErrorsList()); } } else { attr.addFlashAttribute("org.springframework.validation.BindingResult.degree", resultBinding); } attr.addFlashAttribute("degree", modify); return "redirect:/degree/" + id_degree + "/modify.htm"; } @RequestMapping(value = "/degree/{degreeId}/modify.htm", method = RequestMethod.GET) public String modifyDegreeGET(@PathVariable("degreeId") Long id, Model model) throws ServletException { if (!model.containsAttribute("degree")) { Degree p = serviceDegree.getDegree(id).getSingleElement(); model.addAttribute("degree", p); } model.addAttribute("valueButton", "Modify"); model.addAttribute("typeform", "form.modify"); return "degree/form"; } /** * Methods for delete degrees */ @RequestMapping(value = "/degree/{degreeId}/delete.htm", method = RequestMethod.GET) public String deleteDegreeGET(@PathVariable("degreeId") Long id_degree) throws ServletException { Degree degree = serviceDegree.getDegree(id_degree).getSingleElement(); if (serviceDegree.deleteDegree(degree).getSingleElement()) { return "redirect:/degree/page/0.htm?showAll=" + showAll; } else return "redirect:/error.htm"; } /** * Methods for view degrees */ @RequestMapping(value = "/degree/{degreeId}.htm", method = RequestMethod.GET) public ModelAndView getDegreeGET(@PathVariable("degreeId") Long id_degree, @RequestParam(value = "showAll", defaultValue = "false") Boolean show) throws ServletException { Map<String, Object> model = new HashMap<String, Object>(); Degree p = serviceDegree.getDegreeAll(id_degree, show).getSingleElement(); if (p != null) { model.put("showAll", show); model.put("degree", p); if (p.getModules() != null) model.put("modules", p.getModules()); if (p.getCompetences() != null) model.put("competences", p.getCompetences()); return new ModelAndView("degree/view", "model", model); } return new ModelAndView("exception/notFound", "model", model); } @RequestMapping(value = "/degree/upload.htm", method = RequestMethod.GET) public String uploadGet(Model model) { CharsetString charsets = new CharsetString(); model.addAttribute("className", "Degree"); model.addAttribute("listCharsets", charsets.ListCharsets()); model.addAttribute("newUpload", new UploadForm("Degree")); return "upload"; } @RequestMapping(value = "/degree/upload.htm", method = RequestMethod.POST) public String uploadPost(@ModelAttribute("newUpload") @Valid UploadForm upload, BindingResult resultBinding, Model model, Locale locale, RedirectAttributes attr) { if (resultBinding.hasErrors() || upload.getCharset().isEmpty() || upload.getFileData().getSize() == 0) { for (ObjectError error : resultBinding.getAllErrors()) { System.err.println("Error: " + error.getCode() + " - " + error.getDefaultMessage()); } return "upload"; } ResultClass<Boolean> result = serviceDegree.uploadCSV(upload, locale); if (!result.hasErrors()) return "redirect:/degree/page/0.htm"; else { attr.addFlashAttribute("errors", result.getErrorsList()); return "redirect:/degree/upload.htm"; } } @RequestMapping(value = "/degree/download.htm") public void downloadCSV(HttpServletResponse response) throws IOException { serviceDegree.downloadCSV(response); } }