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 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.muse.ambrosia.api.Context; import org.muse.ambrosia.api.Values; import org.muse.ambrosia.util.ControllerImpl; import org.muse.mneme.api.AssessmentPermissionException; import org.muse.mneme.api.Pool; import org.muse.mneme.api.PoolService; import org.muse.mneme.api.QuestionService; import org.sakaiproject.tool.api.ToolManager; import org.sakaiproject.util.StringUtil; import org.sakaiproject.util.Web; /** * The /pools view for the mneme tool. */ public class PoolsView extends ControllerImpl { /** Our log. */ private static Log M_log = LogFactory.getLog(PoolsView.class); /** Dependency: Pool service. */ protected PoolService poolService = null; /** Dependency: Question service. */ protected QuestionService questionService = null; /** Dependency: ToolManager */ 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 { // sort, optional if ((params.length != 2) && (params.length != 3)) { throw new IllegalArgumentException(); } // security if (!this.poolService.allowManagePools(toolManager.getCurrentPlacement().getContext())) { // redirect to error res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, "/error/" + Errors.unauthorized))); return; } // sort parameter String sortCode = "0A"; if (params.length > 2) sortCode = params[2]; if ((sortCode == null) || (sortCode.length() != 2)) { throw new IllegalArgumentException(); } context.put("sort_column", sortCode.charAt(0)); context.put("sort_direction", sortCode.charAt(1)); // 0 is title PoolService.FindPoolsSort sort = null; if ((sortCode.charAt(0) == '0') && (sortCode.charAt(1) == 'A')) { sort = PoolService.FindPoolsSort.title_a; } else if ((sortCode.charAt(0) == '0') && (sortCode.charAt(1) == 'D')) { sort = PoolService.FindPoolsSort.title_d; } else { throw new IllegalArgumentException(); } // collect the pools to show List<Pool> pools = this.poolService.findPools(toolManager.getCurrentPlacement().getContext(), sort, null); context.put("pools", pools); // disable the tool navigation to this view context.put("disablePools", Boolean.TRUE); // pre-read question counts per pool this.questionService.preCountContextQuestions(toolManager.getCurrentPlacement().getContext(), null); // 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 optional if ((params.length != 2) && (params.length != 3)) { throw new IllegalArgumentException(); } // security if (!this.poolService.allowManagePools(toolManager.getCurrentPlacement().getContext())) { // redirect to error res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, "/error/" + Errors.unauthorized))); return; } // sort parameter String sortCode = "0A"; if (params.length > 2) sortCode = params[2]; // for the selected pools to delete Values values = this.uiService.newValues(); context.put("poolids", values); // read form String destination = this.uiService.decode(req, context); if (destination.equals("DELETE")) { for (String id : values.getValues()) { Pool pool = this.poolService.getPool(id); if (pool != null) { try { this.poolService.removePool(pool); } catch (AssessmentPermissionException e) { // redirect to error res.sendRedirect( res.encodeRedirectURL(Web.returnUrl(req, "/error/" + Errors.unauthorized))); return; } } } destination = context.getDestination(); } else if (destination.equals("ADD")) { try { // create new pool Pool newPool = this.poolService.newPool(toolManager.getCurrentPlacement().getContext()); // edit it next destination = "/pool_properties/" + sortCode + "/" + newPool.getId(); } catch (AssessmentPermissionException e) { // redirect to error res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, "/error/" + Errors.unauthorized))); return; } } else if (destination.equals("COMBINE")) { try { // create a new pool Pool newPool = this.poolService.newPool(toolManager.getCurrentPlacement().getContext()); // copy in all the questions for (String id : values.getValues()) { Pool sourcePool = this.poolService.getPool(id); this.questionService.copyPoolQuestions(sourcePool, newPool); } // edit it next destination = "/pool_properties/" + sortCode + "/" + newPool.getId(); } catch (AssessmentPermissionException e) { // redirect to error res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, "/error/" + Errors.unauthorized))); return; } } else if (destination.startsWith("DUPLICATE:")) { String[] parts = StringUtil.split(destination, ":"); if (parts.length != 2) { throw new IllegalArgumentException(); } String pid = parts[1]; try { Pool pool = this.poolService.getPool(pid); if (pool != null) { this.poolService.copyPool(toolManager.getCurrentPlacement().getContext(), pool); } // stay here destination = context.getDestination(); } catch (AssessmentPermissionException e) { // redirect to error res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, "/error/" + Errors.unauthorized))); return; } } res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, destination))); } /** * Set the PoolService. * * @param service * The PoolService. */ public void setPoolService(PoolService service) { this.poolService = service; } /** * Set the QuestionService. * * @param service * The QuestionService. */ public void setQuestionService(QuestionService service) { this.questionService = service; } /** * @param toolManager * the ToolManager. */ public void setToolManager(ToolManager toolManager) { this.toolManager = toolManager; } }