Java tutorial
/* * Copyright (C) 2007 Unicon, Inc. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this distribution. It is also available here: * http://www.fsf.org/licensing/licenses/gpl.html * * As a special exception to the terms and conditions of version * 2 of the GPL, you may redistribute this Program in connection * with Free/Libre and Open Source Software ("FLOSS") applications * as described in the GPL FLOSS exception. You should have received * a copy of the text describing the FLOSS exception along with this * distribution. */ package net.unicon.academus.apps.briefcase.engine; import java.util.StringTokenizer; import net.unicon.academus.apps.ErrorMessage; import net.unicon.academus.apps.briefcase.BriefcaseApplicationContext; import net.unicon.academus.apps.briefcase.BriefcaseUserContext; import net.unicon.academus.apps.briefcase.Drive; import net.unicon.alchemist.access.AccessBroker; import net.unicon.alchemist.access.IAccessEntry; import net.unicon.alchemist.encrypt.EncryptionService; import net.unicon.demetrius.DemetriusException; import net.unicon.demetrius.IFolder; import net.unicon.demetrius.fac.AbstractResourceFactory; import net.unicon.penelope.IChoiceCollection; import net.unicon.penelope.IDecision; import net.unicon.penelope.IDecisionCollection; import net.unicon.penelope.ISelection; import net.unicon.warlock.Handle; import net.unicon.warlock.IAction; import net.unicon.warlock.IActionResponse; import net.unicon.warlock.IScreen; import net.unicon.warlock.IUserContext; import net.unicon.warlock.IWarlockFactory; import net.unicon.warlock.StateMachine; import net.unicon.warlock.WarlockException; import net.unicon.warlock.XmlFormatException; import net.unicon.warlock.fac.SimpleActionResponse; import org.dom4j.Attribute; import org.dom4j.Element; public final class RemoveFolderSharingAction extends BriefcaseAbstractAction { // Instance Members. private IScreen screen; private BriefcaseApplicationContext bac = null; /* * Public API. */ public static IAction parse(Element e, IWarlockFactory owner) throws WarlockException { // Assertions. if (e == null) { String msg = "Argument 'e [Element]' cannot be null."; throw new IllegalArgumentException(msg); } if (!e.getName().equals("action")) { String msg = "Argument 'e [Element]' must be an <action> element."; throw new IllegalArgumentException(msg); } if (owner == null) { String msg = "Argument 'owner+' cannot be null."; throw new IllegalArgumentException(msg); } // Handle. Attribute h = e.attribute("handle"); if (h == null) { String msg = "Element <action> is missing required attribute " + "'handle'."; throw new XmlFormatException(msg); } Handle handle = Handle.create(h.getValue()); // Choices. String[] choices = new String[0]; Attribute p = e.attribute("inpt"); if (p != null) { StringTokenizer tokens = new StringTokenizer(p.getValue(), ","); choices = new String[tokens.countTokens()]; for (int i = 0; tokens.hasMoreTokens(); i++) { choices[i] = tokens.nextToken(); } } return new RemoveFolderSharingAction(owner, handle, choices); } public void init(StateMachine m) { // Assertions. if (m == null) { String msg = "Argument 'm [StateMachine]' cannot be null."; throw new IllegalArgumentException(msg); } screen = m.getScreen(Handle.create("addedit_folder")); bac = (BriefcaseApplicationContext) m.getContext(); } public IActionResponse invoke(IDecisionCollection[] decisions, IUserContext ctx) throws WarlockException { // Assertions. if (decisions == null) { String msg = "Argument 'decisions' cannot be null."; throw new IllegalArgumentException(msg); } if (ctx == null) { String msg = "Argument 'ctx' cannot be null."; throw new IllegalArgumentException(msg); } if (decisions.length < 1) { String msg = "Argument 'decisions' cannot be empty."; throw new IllegalArgumentException(msg); } if (log.isDebugEnabled()) { log.debug("Invoking Briefcase Action: " + getClass().getName()); } BriefcaseUserContext buc = (BriefcaseUserContext) ctx; // get the folder whose sharing is to be removed. IDecisionCollection dc = decisions[0]; IChoiceCollection cc = dc.getChoiceCollection(); IDecision dFolderId = dc.getDecision(cc.getChoice(net.unicon.penelope.Handle.create("cId"))); ISelection sFolderId = dFolderId.getSelections()[0]; EncryptionService encryptionService = bac.getEncryptionService(); String url = sFolderId.getOption().getHandle().getValue(); url = encryptionService.decrypt(url); IFolder f = null; try { f = (IFolder) AbstractResourceFactory.resourceFromUrl(url); // get the entries for the given folder Drive sharedDrive = bac.getDrive(buc.getDriveSelection().getShareTarget()); IAccessEntry[] entries = bac.getSharedEntries(f, buc.getUsername(), sharedDrive); AccessBroker broker = sharedDrive.getBroker(); // delete all the entries from the database. for (int i = 0; i < entries.length; i++) { broker.removeAccess(entries[i]); } } catch (DemetriusException e) { ErrorMessage[] err = new ErrorMessage[1]; String problem = "The selected folder is no longer accessible. "; err[0] = new ErrorMessage("other", problem, ""); e.printStackTrace(); return new SimpleActionResponse(screen, new FolderQuery(buc.getHistory().getLocation(), bac, buc, err)); } return new SimpleActionResponse(screen, new EditFolderQuery(f, false, true, bac, buc)); } /* * Package API. */ private RemoveFolderSharingAction(IWarlockFactory owner, Handle handle, String[] choices) { super(owner, handle, choices); // Instance Members. this.screen = null; } }