Java tutorial
/********************************************************************************** * $URL$ * $Id$ *********************************************************************************** * * 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.muse.mneme.tool; import java.io.IOException; import java.util.ArrayList; 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.Paging; 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.Question; import org.muse.mneme.api.QuestionService; import org.sakaiproject.component.api.ServerConfigurationService; import org.sakaiproject.tool.api.ToolManager; import org.sakaiproject.util.StringUtil; import org.sakaiproject.util.Web; /** * The pools delete view for the mneme tool. */ public class PoolEditView extends ControllerImpl { /** Our log. */ private static Log M_log = LogFactory.getLog(PoolEditView.class); /** Configuration: the page sizes for the view. */ protected List<Integer> pageSizes = new ArrayList<Integer>(); /** Pool Service */ protected PoolService poolService = null; /** Question Service */ protected QuestionService questionService = null; /** Dependency: ServerConfigurationService. */ protected ServerConfigurationService serverConfigurationService = 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 { // pools sort, pool id, optional sort, optional paging if ((params.length != 4) && (params.length != 5) && (params.length != 6)) { throw new IllegalArgumentException(); } if (!this.poolService.allowManagePools(toolManager.getCurrentPlacement().getContext())) { // redirect to error res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, "/error/" + Errors.unauthorized))); return; } // pools view sort String poolsSortCode = null; poolsSortCode = params[2]; context.put("poolsSortCode", poolsSortCode); // pool String pid = params[3]; Pool pool = this.poolService.getPool(pid); if (pool == null) { // redirect to error res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, "/error/" + Errors.invalid))); return; } context.put("pool", pool); // sort String sortCode = "0A"; if (params.length > 4) sortCode = params[4]; if ((sortCode == null) || (sortCode.length() != 2)) { throw new IllegalArgumentException(); } context.put("sort_column", sortCode.charAt(0)); context.put("sort_direction", sortCode.charAt(1)); QuestionService.FindQuestionsSort sort = null; // 0 is description if ((sortCode.charAt(0) == '0') && (sortCode.charAt(1) == 'A')) sort = QuestionService.FindQuestionsSort.description_a; else if ((sortCode.charAt(0) == '0') && (sortCode.charAt(1) == 'D')) sort = QuestionService.FindQuestionsSort.description_d; // 1 is type else if ((sortCode.charAt(0) == '1') && (sortCode.charAt(1) == 'A')) sort = QuestionService.FindQuestionsSort.type_a; else if ((sortCode.charAt(0) == '1') && (sortCode.charAt(1) == 'D')) sort = QuestionService.FindQuestionsSort.type_d; else { throw new IllegalArgumentException(); } // paging String pagingParameter = "1-" + Integer.toString(this.pageSizes.get(0)); if (params.length > 5) pagingParameter = params[5]; Integer maxQuestions = this.questionService.countQuestions(pool, null, null, null, null); Paging paging = uiService.newPaging(); paging.setMaxItems(maxQuestions); paging.setCurrentAndSize(pagingParameter); context.put("paging", paging); // get questions List<Question> questions = questionService.findQuestions(pool, sort, null, null, paging.getSize() == 0 ? null : paging.getCurrent(), paging.getSize() == 0 ? null : paging.getSize(), null, null); context.put("questions", questions); // pages sizes if (this.pageSizes.size() > 1) { context.put("pageSizes", this.pageSizes); } uiService.render(ui, context); } /** * Final initialization, once all dependencies are set. */ public void init() { super.init(); String pageSize = StringUtil .trimToNull(this.serverConfigurationService.getString("pageSize@org.muse.mneme.tool.PoolEditView")); if (pageSize != null) setPageSize(pageSize); if (this.pageSizes.isEmpty()) { this.pageSizes.add(Integer.valueOf(30)); } M_log.info("init()"); } /** * {@inheritDoc} */ public void post(HttpServletRequest req, HttpServletResponse res, Context context, String[] params) throws IOException { // pools sort, pool id, optional sort, optional paging if ((params.length != 4) && (params.length != 5) && (params.length != 6)) { throw new IllegalArgumentException(); } if (!this.poolService.allowManagePools(toolManager.getCurrentPlacement().getContext())) { // redirect to error res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, "/error/" + Errors.unauthorized))); return; } // for the selected questions to delete Values values = this.uiService.newValues(); context.put("questionids", values); // read form String destination = this.uiService.decode(req, context); if (destination.equals("DELETE")) { for (String id : values.getValues()) { Question question = this.questionService.getQuestion(id); if (question != null) { try { this.questionService.removeQuestion(question); } catch (AssessmentPermissionException e) { // redirect to error res.sendRedirect( res.encodeRedirectURL(Web.returnUrl(req, "/error/" + Errors.unauthorized))); return; } } } // stay here destination = context.getDestination(); } else if (destination.trim().startsWith("DUPLICATE:")) { String[] parts = StringUtil.split(destination, ":"); if (parts.length != 2) { throw new IllegalArgumentException(); } String qid = parts[1]; try { Question question = this.questionService.getQuestion(qid); if (question != null) { // copy within the same pool this.questionService.copyQuestion(question, null); } // stay here destination = context.getDestination(); } catch (AssessmentPermissionException e) { // redirect to error res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, "/error/" + Errors.unauthorized))); return; } } else if ((destination.trim().startsWith("/question_copy")) || (destination.trim().startsWith("/question_move"))) { // add the selected ids to the destination StringBuilder buf = new StringBuilder(); buf.append(destination); buf.append("/"); for (String id : values.getValues()) { buf.append(id); buf.append("+"); } buf.setLength(buf.length() - 1); destination = buf.toString(); } res.sendRedirect(res.encodeRedirectURL(Web.returnUrl(req, destination))); } /** * Set the the page size for the view. * * @param sizes * The the page sizes for the view - integers, comma separated. */ public void setPageSize(String sizes) { this.pageSizes.clear(); String[] parts = StringUtil.split(sizes, ","); for (String part : parts) { this.pageSizes.add(Integer.valueOf(part)); } } /** * @param poolService * the poolService to set */ public void setPoolService(PoolService poolService) { this.poolService = poolService; } /** * @param questionService * the questionService to set */ public void setQuestionService(QuestionService questionService) { this.questionService = questionService; } /** * Set the ServerConfigurationService. * * @param service * the ServerConfigurationService. */ public void setServerConfigurationService(ServerConfigurationService service) { this.serverConfigurationService = service; } /** * @param toolManager * the toolManager to set */ public void setToolManager(ToolManager toolManager) { this.toolManager = toolManager; } }