Java tutorial
/********************************************************************************** * $URL$ * $Id$ *********************************************************************************** * * Copyright (c) 2007 The Regents of the University of Michigan & Foothill College, ETUDES Project * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * **********************************************************************************/ package org.muse.mneme.tool; import java.io.IOException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.muse.ambrosia.api.Context; import org.muse.ambrosia.util.ControllerImpl; import org.muse.mneme.api.Assessment; import org.muse.mneme.api.AssessmentPermissionException; import org.muse.mneme.api.AssessmentPolicyException; import org.muse.mneme.api.AssessmentService; import org.muse.mneme.api.GradesService; import org.muse.mneme.api.Part; import org.sakaiproject.util.StringUtil; import org.sakaiproject.util.Web; /** * The /assessment_settings view for the mneme tool. */ public class AssessmentSettingsView extends ControllerImpl { /** Our log. */ private static Log M_log = LogFactory.getLog(AssessmentSettingsView.class); /** Assessment service. */ protected AssessmentService assessmentService = null; /** Dependency: GradesService */ protected GradesService gradesService = null; /** * Shutdown. */ public void destroy() { M_log.info("destroy()"); } /** * {@inheritDoc} */ public void get(HttpServletRequest req, HttpServletResponse res, Context context, String[] params) throws IOException { // sort, aid if (params.length != 4) { throw new IllegalArgumentException(); } String sort = params[2]; String assessmentId = params[3]; Assessment assessment = assessmentService.getAssessment(assessmentId); if (assessment == null) { // redirect to error res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, "/error/" + Errors.invalid))); return; } // security check if (!assessmentService.allowEditAssessment(assessment)) { // redirect to error res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, "/error/" + Errors.unauthorized))); return; } // format an invalid message if ((!assessment.getIsValid()) && (!assessment.getPublished())) { context.put("invalidMsg", AssessmentInvalidView.formatInvalidDisplay(assessment, this.messages)); } // format part list of zero parts if (assessment.getHasPoints() && assessment.getParts().getHasZeroPointParts()) { StringBuilder buf = new StringBuilder("<ul>"); Object args[] = new Object[1]; for (Part part : assessment.getParts().getParts()) { if ((part.getTotalPoints().floatValue() == 0f) && (part.getIsValid())) { args[0] = part.getTitle(); if (args[0] == null) args[0] = part.getOrdering().getPosition().toString(); buf.append("<li>" + this.messages.getFormattedMessage("part", args) + "</li>"); } } buf.append("</ul>"); context.put("zeroMsg", buf.toString()); } // collect information: the selected assessment context.put("assessment", assessment); context.put("sort", sort); // check if we have gradebook context.put("gradebookAvailable", this.gradesService.available(assessment.getContext())); // if we have a focus parameter String focus = req.getParameter("focus"); if (focus != null) context.addFocusId(focus); // render uiService.render(ui, context); } /** * Final initialization, once all dependencies are set. */ public void init() { super.init(); M_log.info("init()"); } /** * {@inheritDoc} */ public void post(HttpServletRequest req, HttpServletResponse res, Context context, String[] params) throws IOException { // sort, aid if (params.length != 4) { throw new IllegalArgumentException(); } String sort = params[2]; String assessmentId = params[3]; Assessment assessment = assessmentService.getAssessment(assessmentId); if (assessment == null) { // redirect to error res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, "/error/" + Errors.invalid))); return; } // security check if (!assessmentService.allowEditAssessment(assessment)) { // redirect to error res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, "/error/" + Errors.unauthorized))); return; } // setup the model: the selected assessment context.put("assessment", assessment); // read the form String destination = uiService.decode(req, context); // if publish, set if ("PUBLISH".equals(destination)) { assessment.setPublished(Boolean.TRUE); destination = "/assessments/" + sort; } // commit the save try { this.assessmentService.saveAssessment(assessment); } catch (AssessmentPermissionException e) { // redirect to error res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, "/error/" + Errors.unauthorized))); return; } catch (AssessmentPolicyException e) { // redirect to error res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, "/error/" + Errors.policy))); return; } // if destination became null if (destination == null) { destination = context.getDestination(); } // if destination is stay here else if (destination.startsWith("STAY:")) { String[] parts = StringUtil.splitFirst(destination, ":"); destination = context.getDestination() + "?focus=" + parts[1]; } // redirect to the next destination res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, destination))); } /** * Set the AssessmentService. * * @param service * The AssessmentService. */ public void setAssessmentService(AssessmentService service) { this.assessmentService = service; } /** * Set the GradesService. * * @param service * The GradesService. */ public void setGradesService(GradesService service) { this.gradesService = service; } }