Java tutorial
/* $This file is distributed under the terms of the license in /doc/license.txt$ */ package edu.cornell.mannlib.vitro.webapp.controller.edit; import java.io.IOException; import java.util.ArrayList; import java.util.List; import javax.servlet.RequestDispatcher; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import edu.cornell.mannlib.vedit.beans.EditProcessObject; import edu.cornell.mannlib.vedit.beans.FormObject; import edu.cornell.mannlib.vedit.controller.BaseEditController; import edu.cornell.mannlib.vedit.forwarder.PageForwarder; import edu.cornell.mannlib.vedit.forwarder.impl.UrlForwarder; import edu.cornell.mannlib.vedit.util.FormUtils; import edu.cornell.mannlib.vedit.validator.Validator; import edu.cornell.mannlib.vedit.validator.impl.RequiredFieldValidator; import edu.cornell.mannlib.vitro.webapp.auth.permissions.SimplePermission; import edu.cornell.mannlib.vitro.webapp.beans.PropertyGroup; import edu.cornell.mannlib.vitro.webapp.controller.Controllers; import edu.cornell.mannlib.vitro.webapp.controller.VitroRequest; import edu.cornell.mannlib.vitro.webapp.modelaccess.ModelAccess; import edu.cornell.mannlib.vitro.webapp.dao.PropertyGroupDao; public class PropertyGroupRetryController extends BaseEditController { private static final Log log = LogFactory.getLog(PropertyGroupRetryController.class.getName()); public void doPost(HttpServletRequest req, HttpServletResponse response) { if (!isAuthorizedToDisplayPage(req, response, SimplePermission.USE_MISCELLANEOUS_ADMIN_PAGES.ACTION)) { return; } VitroRequest request = new VitroRequest(req); //create an EditProcessObject for this and put it in the session EditProcessObject epo = super.createEpo(request); String action = null; if (epo.getAction() == null) { action = "insert"; epo.setAction("insert"); } else { action = epo.getAction(); } PropertyGroupDao pgDao = ModelAccess.on(getServletContext()).getWebappDaoFactory().getPropertyGroupDao(); epo.setDataAccessObject(pgDao); PropertyGroup propertyGroupForEditing = null; if (!epo.getUseRecycledBean()) { if (request.getParameter("uri") != null) { try { propertyGroupForEditing = (PropertyGroup) pgDao.getGroupByURI(request.getParameter("uri")); action = "update"; epo.setAction("update"); } catch (NullPointerException e) { log.error("Need to implement 'record not found' error message."); } if (propertyGroupForEditing == null) { // UTF-8 expected due to URIEncoding on Connector element in server.xml String uriToFind = new String(request.getParameter("uri")); propertyGroupForEditing = (PropertyGroup) pgDao.getGroupByURI(uriToFind); } } else { propertyGroupForEditing = new PropertyGroup(); } epo.setOriginalBean(propertyGroupForEditing); } else { propertyGroupForEditing = (PropertyGroup) epo.getNewBean(); } //validators List<Validator> validatorList = new ArrayList<Validator>(); validatorList.add(new RequiredFieldValidator()); epo.getValidatorMap().put("Name", validatorList); //make a postinsert pageforwarder that will send us to a new class's fetch screen epo.setPostInsertPageForwarder(new PropertyGroupInsertPageForwarder()); //make a postdelete pageforwarder that will send us to the list of classes epo.setPostDeletePageForwarder(new UrlForwarder("listPropertyGroups")); //set the getMethod so we can retrieve a new bean after we've inserted it try { Class[] args = new Class[1]; args[0] = String.class; epo.setGetMethod(pgDao.getClass().getDeclaredMethod("getGroupByURI", args)); } catch (NoSuchMethodException e) { log.error(this.getClass().getName() + " could not find the getGroupByURI method"); } FormObject foo = new FormObject(); foo.setErrorMap(epo.getErrMsgMap()); epo.setFormObject(foo); FormUtils.populateFormFromBean(propertyGroupForEditing, action, foo, epo.getBadValueMap()); RequestDispatcher rd = request.getRequestDispatcher(Controllers.BASIC_JSP); request.setAttribute("bodyJsp", "/templates/edit/formBasic.jsp"); request.setAttribute("formJsp", "/templates/edit/specific/propertyGroup_retry.jsp"); request.setAttribute("scripts", "/templates/edit/formBasic.js"); request.setAttribute("title", "Property Group Editing Form"); request.setAttribute("_action", action); request.setAttribute("unqualifiedClassName", "PropertyGroup"); setRequestAttributes(request, epo); try { rd.forward(request, response); } catch (Exception e) { log.error("PropertyGroupRetryController could not forward to view."); log.error(e.getMessage()); log.error(e.getStackTrace()); } } public void doGet(HttpServletRequest request, HttpServletResponse response) { doPost(request, response); } class PropertyGroupInsertPageForwarder implements PageForwarder { public void doForward(HttpServletRequest request, HttpServletResponse response, EditProcessObject epo) { String newPropertyGroupUrl = "listPropertyGroups"; try { response.sendRedirect(newPropertyGroupUrl); } catch (IOException ioe) { log.error("PropertyGroupInsertPageForwarder could not send redirect."); } } } }