Java tutorial
/********************************************************************************** * $URL$ * $Id$ *********************************************************************************** * * Copyright (c) 2008 Etudes, Inc. * * Portions completed before September 1, 2008 * Copyright (c) 2007, 2008 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.etudes.mneme.tool; import java.io.IOException; import java.util.List; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.etudes.ambrosia.api.Context; import org.etudes.ambrosia.util.ControllerImpl; import org.etudes.mneme.api.AssessmentService; import org.etudes.mneme.api.Submission; import org.etudes.mneme.api.SubmissionService; import org.sakaiproject.tool.api.ToolManager; import org.sakaiproject.util.Web; /** * The /guest_list view for the mneme tool. */ public class GuestListView extends ControllerImpl { /** Our log. */ private static Log M_log = LogFactory.getLog(GuestListView.class); /** Dependency: AssessmentService. */ protected AssessmentService assessmentService = null; /** Dependency: SubmissionService. */ protected SubmissionService submissionService = null; /** tool manager reference. */ protected ToolManager toolManager = null; /** * Shutdown. */ public void destroy() { M_log.info("destroy()"); } /** * {@inheritDoc} */ public void get(HttpServletRequest req, HttpServletResponse res, Context context, String[] params) throws IOException { // 0 or 1 parameters if ((params.length != 2) && (params.length != 3)) { throw new IllegalArgumentException(); } // check security if (!assessmentService.allowGuest(toolManager.getCurrentPlacement().getContext())) { // redirect to error res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, "/error/" + Errors.unauthorized))); return; } // optional sort parameter String sortCode = null; if (params.length == 3) { sortCode = params[2]; } // SORT: 0|1|2|3 A|D - 2 chars, column | direction if ((sortCode != null) && (sortCode.length() != 2)) { // redirect to error res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, "/error/" + Errors.invalid))); return; } SubmissionService.GetUserContextSubmissionsSort sort = SubmissionService.GetUserContextSubmissionsSort.title_a; if (sortCode != null) { context.put("sort_column", sortCode.charAt(0)); context.put("sort_direction", sortCode.charAt(1)); // 0 is title if ((sortCode.charAt(0) == '0') && (sortCode.charAt(1) == 'A')) { sort = SubmissionService.GetUserContextSubmissionsSort.title_a; } else if ((sortCode.charAt(0) == '0') && (sortCode.charAt(1) == 'D')) { sort = SubmissionService.GetUserContextSubmissionsSort.title_d; } // 1 is status // TODO: remove status else if ((sortCode.charAt(0) == '1') && (sortCode.charAt(1) == 'A')) { sort = SubmissionService.GetUserContextSubmissionsSort.status_a; } else if ((sortCode.charAt(0) == '1') && (sortCode.charAt(1) == 'D')) { sort = SubmissionService.GetUserContextSubmissionsSort.status_d; } // 2 is due date else if ((sortCode.charAt(0) == '2') && (sortCode.charAt(1) == 'A')) { sort = SubmissionService.GetUserContextSubmissionsSort.dueDate_a; } else if ((sortCode.charAt(0) == '2') && (sortCode.charAt(1) == 'D')) { sort = SubmissionService.GetUserContextSubmissionsSort.dueDate_d; } // 3 is type else if ((sortCode.charAt(0) == '3') && (sortCode.charAt(1) == 'A')) { sort = SubmissionService.GetUserContextSubmissionsSort.type_a; } else if ((sortCode.charAt(0) == '3') && (sortCode.charAt(1) == 'D')) { sort = SubmissionService.GetUserContextSubmissionsSort.type_d; } else { // redirect to error res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, "/error/" + Errors.invalid))); return; } } // default sort: title descending if (sortCode == null) { context.put("sort_column", '0'); context.put("sort_direction", 'D'); sort = SubmissionService.GetUserContextSubmissionsSort.title_d; } // collect information: submissions / assessments List<Submission> submissions = this.submissionService .getUserContextSubmissions(toolManager.getCurrentPlacement().getContext(), null, sort); context.put("submissions", submissions); // disable the tool navigation to this view context.put("disableDelivery", Boolean.TRUE); // for the tool navigation if (this.assessmentService.allowManageAssessments(toolManager.getCurrentPlacement().getContext())) { context.put("maintainer", Boolean.TRUE); } // 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 { // check security if (!assessmentService.allowGuest(toolManager.getCurrentPlacement().getContext())) { // redirect to error res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, "/error/" + Errors.unauthorized))); return; } // read form String destination = this.uiService.decode(req, context); // go there res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, destination))); } /** * Set the assessment service. * * @param service * The assessment service. */ public void setAssessmentService(AssessmentService service) { this.assessmentService = service; } /** * Set the submission service. * * @param service * The submission service. */ public void setSubmissionService(SubmissionService service) { this.submissionService = service; } /** * Set the tool manager. * * @param manager * The tool manager. */ public void setToolManager(ToolManager manager) { toolManager = manager; } }