Java tutorial
/** * This file is part of Location Service :: Admin. Copyright (C) 2014 Petteri * Kivimki * * Location Service :: Admin is free software: you can redistribute it and/or * modify it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or (at your * option) any later version. * * Location Service :: Admin 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 General * Public License for more details. * * You should have received a copy of the GNU General Public License along with * Location Service :: Admin. If not, see <http://www.gnu.org/licenses/>. */ package com.pkrete.locationservice.admin.controller.mvc; import com.pkrete.locationservice.admin.converter.ConverterService; import com.pkrete.locationservice.admin.exception.ObjectNotFoundException; import com.pkrete.locationservice.admin.model.illustration.Image; import com.pkrete.locationservice.admin.model.owner.Owner; import com.pkrete.locationservice.admin.service.ImagesService; import com.pkrete.locationservice.admin.util.Settings; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.springframework.ui.ModelMap; import org.springframework.web.servlet.ModelAndView; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.beans.factory.annotation.Qualifier; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.validation.BindingResult; import org.springframework.validation.Validator; import org.springframework.web.bind.annotation.ModelAttribute; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.SessionAttributes; /** * The {@link EditImageController EditImageController} handles the requests that * are related to editing an image object and then saving it to the database. * This class extends abstract {@link BaseController BaseLocationController} * class. * * @author Petteri Kivimki */ @Controller @RequestMapping("/editimage.htm") @SessionAttributes("image") public class EditImageController extends BaseController { @Autowired @Qualifier("imagesService") private ImagesService imagesService; @Autowired @Qualifier("imageValidator") private Validator validator; @Autowired @Qualifier("converterService") private ConverterService converterService; @RequestMapping(method = RequestMethod.POST) public ModelAndView onSubmit(HttpServletRequest request, HttpServletResponse response, @ModelAttribute("image") Image image, BindingResult result) throws Exception { validator.validate(image, result); if (result.hasErrors()) { ModelMap model = new ModelMap(); model.put("external", image.getIsExternal()); model.put("imagesPath", image.getIsExternal() ? "" : Settings.getInstance().getImagesWebPath(getOwner(request).getCode())); return new ModelAndView("edit_image", model); } String imageId = request.getParameter("imageId"); image.setUpdater(getUser(request).getUsername()); if (!imagesService.update(image)) { throw new Exception("Updating image failed."); } return new ModelAndView("redirect:illustrations.htm?select_image=" + imageId); } @RequestMapping(method = RequestMethod.GET) public String initializeForm(HttpServletRequest request, ModelMap model) throws Exception { // Form backing object String id = request.getParameter("imageId"); Owner owner = getOwner(request); Image img = imagesService.get(this.converterService.strToInt(id), owner); if (img == null) { throw new ObjectNotFoundException(new StringBuilder("Image not found. {\"id\":").append(id) .append(",\"owner\":\"").append(owner.getCode()).append("\"}").toString()); } if (img.getIsExternal()) { img.setUrl(img.getPath()); } model.put("image", img); // Other reference data model.put("external", img.getIsExternal()); model.put("imagesPath", img.getIsExternal() ? "" : Settings.getInstance().getImagesWebPath(getOwner(request).getCode())); return "edit_image"; } }