Java tutorial
/* * Copyright 2014 Benjamin Gehrels * * This file is part of The Single Transferable Vote Elections Web Interface. * * The Single Transferable Vote Elections Web Interface 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. * * The Single Transferable Vote Elections Web Interface 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 The Single Transferable Vote * Elections Web Interface. If not, see <http://www.gnu.org/licenses/>. */ package info.gehrels.voting.web; import info.gehrels.voting.web.applicationState.BallotLayoutState; import info.gehrels.voting.web.applicationState.CastBallotsState; import org.springframework.stereotype.Controller; import org.springframework.ui.ModelMap; import org.springframework.validation.BindingResult; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.servlet.ModelAndView; import javax.validation.Valid; import static org.springframework.web.bind.annotation.RequestMethod.GET; import static org.springframework.web.bind.annotation.RequestMethod.POST; import static org.springframework.web.bind.annotation.RequestMethod.PUT; @Controller public final class AdministrateBallotLayoutController { private final BallotLayoutState ballotLayoutState; private final CastBallotsState castBallotsState; public AdministrateBallotLayoutController(BallotLayoutState ballotLayoutState, CastBallotsState castBallotsState) { this.ballotLayoutState = ballotLayoutState; this.castBallotsState = castBallotsState; } @RequestMapping(value = "/administrateBallotLayout", method = { GET }) public ModelAndView showNewEmptyBallotLayout() { return new ModelAndView("administrateBallotLayout", "ballotLayoutBuilderBean", new BallotLayoutBuilderBean()); } @RequestMapping(value = "/administrateBallotLayout", method = { PUT, POST }, params = { "addNewElection" }) public ModelAndView addNewElection(@Valid BallotLayoutBuilderBean form, BindingResult bindingResult) { form.addNewElection(); return createModelAndView(form); } @RequestMapping(value = "/administrateBallotLayout", method = { PUT, POST }, params = { "addNewCandidate" }) public ModelAndView addNewElection(@RequestParam("addNewCandidate") int electionIndex, @Valid BallotLayoutBuilderBean form, BindingResult bindingResult) { form.getElections().get(electionIndex).addNewCandidate(); return createModelAndView(form); } @RequestMapping(value = "/administrateBallotLayout", method = { PUT, POST }, params = { "deleteElection" }) public ModelAndView deleteElection(@RequestParam("deleteElection") int electionIndex, @Valid BallotLayoutBuilderBean form, BindingResult bindingResult) { form.getElections().remove(electionIndex); return createModelAndView(form); } @RequestMapping(value = "/administrateBallotLayout", method = { PUT, POST }, params = { "deleteCandidate" }) public ModelAndView deleteOffice(@RequestParam String deleteCandidate, @Valid BallotLayoutBuilderBean form, BindingResult bindingResult) { String[] splitted = deleteCandidate.split("_"); form.getElections().get(Integer.parseInt(splitted[0])).deleteCandidate(Integer.parseInt(splitted[1])); return createModelAndView(form); } @RequestMapping(value = "/administrateBallotLayout", method = { PUT, POST }) public ModelAndView saveBallotLayout(@Valid BallotLayoutBuilderBean form, BindingResult bindingResult) { if (bindingResult.hasErrors()) { return createModelAndView(form); } ballotLayoutState.ballotLayout = form.createBallotLayout(); castBallotsState.reset(); return new ModelAndView("redirect:/"); } private ModelAndView createModelAndView(BallotLayoutBuilderBean form) { return new ModelAndView("administrateBallotLayout", new ModelMap("ballotLayoutBuilderBean", form)); } }