Java tutorial
/* * eGov suite of products aim to improve the internal efficiency,transparency, * accountability and the service delivery of the government organizations. * * Copyright (C) <2015> eGovernments Foundation * * The updated version of eGov suite of products as by eGovernments Foundation * is available at http://www.egovernments.org * * This program 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 * any later version. * * This program 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 this program. If not, see http://www.gnu.org/licenses/ or * http://www.gnu.org/licenses/gpl.html . * * In addition to the terms of the GPL license to be adhered to in using this * program, the following additional terms are to be complied with: * * 1) All versions of this program, verbatim or modified must carry this * Legal Notice. * * 2) Any misrepresentation of the origin of the material is prohibited. It * is required that all modified versions of this material be marked in * reasonable ways as different from the original version. * * 3) This license does not grant any rights to any user of the program * with regards to rights under trademark law for use of the trade names * or trademarks of eGovernments Foundation. * * In case of any queries, you can reach eGovernments Foundation at contact@egovernments.org. */ package org.egov.pgr.web.controller.masters.escalationTime; import com.google.gson.Gson; import com.google.gson.GsonBuilder; import org.apache.commons.io.IOUtils; import org.egov.eis.service.DesignationService; import org.egov.pgr.entity.Escalation; import org.egov.pgr.service.ComplaintTypeService; import org.egov.pgr.service.EscalationService; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.data.domain.Page; import org.springframework.http.MediaType; import org.springframework.stereotype.Controller; import org.springframework.ui.Model; import org.springframework.web.bind.annotation.ModelAttribute; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; import org.springframework.web.bind.annotation.ResponseBody; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import java.io.IOException; import java.util.List; import static org.springframework.web.bind.annotation.RequestMethod.GET; @Controller @RequestMapping(value = "/escalationTime") public class ViewEscalationTimeController { public static final String CONTENTTYPE_JSON = "application/json"; protected ComplaintTypeService complaintTypeService; protected EscalationService escalationService; protected DesignationService designationService; @Autowired public ViewEscalationTimeController(final ComplaintTypeService complaintTypeService, EscalationService escalationService, DesignationService designationService) { this.complaintTypeService = complaintTypeService; this.escalationService = escalationService; this.designationService = designationService; } @ModelAttribute public Escalation escalation() { return new Escalation(); } @RequestMapping(value = "/search", method = GET) public String searchForm(@ModelAttribute Escalation escalation, final Model model) { model.addAttribute("mode", "new"); return "escalationTime-search"; } @RequestMapping(value = "/search", method = RequestMethod.POST) public String searchEscalationTimeForm(@ModelAttribute Escalation escalation, final Model model) { model.addAttribute("mode", "new"); return "escalationTime-search"; } @RequestMapping(value = "resultList-update", method = RequestMethod.GET) public @ResponseBody void springPaginationDataTablesUpdate(final HttpServletRequest request, final HttpServletResponse response) throws IOException { Long complaintTypeId = Long.valueOf(0), designationId = Long.valueOf(0); final int pageStart = Integer.valueOf(request.getParameter("start")); final int pageSize = Integer.valueOf(request.getParameter("length")); if (request.getParameter("complaintTypeId") != null && !"".equals(request.getParameter("complaintTypeId"))) complaintTypeId = Long.valueOf(request.getParameter("complaintTypeId")); if (request.getParameter("designationId") != null && !"".equals(request.getParameter("designationId"))) designationId = Long.valueOf(request.getParameter("designationId")); final int pageNumber = pageStart / pageSize + 1; final String escalationTimeRouterJSONData = commonSearchResult(pageNumber, pageSize, complaintTypeId, designationId); response.setContentType(MediaType.APPLICATION_JSON_VALUE); IOUtils.write(escalationTimeRouterJSONData, response.getWriter()); } public String commonSearchResult(final Integer pageNumber, final Integer pageSize, final Long complaintTypeId, final Long designationId) { final Page<Escalation> pageOfEscalation = escalationService.getPageOfEscalations(pageNumber, pageSize, complaintTypeId, designationId); final List<Escalation> positionList = pageOfEscalation.getContent(); final StringBuilder complaintRouterJSONData = new StringBuilder(); complaintRouterJSONData.append("{\"draw\": ").append("0"); complaintRouterJSONData.append(",\"recordsTotal\":").append(pageOfEscalation.getTotalElements()); complaintRouterJSONData.append(",\"totalDisplayRecords\":").append(pageSize); complaintRouterJSONData.append(",\"recordsFiltered\":").append(pageOfEscalation.getTotalElements()); complaintRouterJSONData.append(",\"data\":").append(toJSON(positionList)).append("}"); return complaintRouterJSONData.toString(); } private String toJSON(final Object object) { final GsonBuilder gsonBuilder = new GsonBuilder(); final Gson gson = gsonBuilder.registerTypeAdapter(Escalation.class, new EscalationTimeAdaptor()).create(); final String json = gson.toJson(object); return json; } }