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.alchemist.access.IAccessEntry; import net.unicon.alchemist.encrypt.EncryptionService; import net.unicon.demetrius.DemetriusException; import net.unicon.demetrius.IFile; import net.unicon.demetrius.IFolder; import net.unicon.demetrius.IResource; import net.unicon.demetrius.ResourceType; import net.unicon.demetrius.fac.AbstractResourceFactory; import net.unicon.penelope.IChoiceCollection; import net.unicon.penelope.IDecision; import net.unicon.penelope.IDecisionCollection; 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.AbstractWarlockFactory; import net.unicon.warlock.fac.SimpleActionResponse; import org.dom4j.Attribute; import org.dom4j.Element; public final class EditResourceAction extends AbstractWarlockFactory.AbstractAction { // Instance Members. private BriefcaseApplicationContext app; private IScreen fileScreen; private IScreen folderScreen; private IScreen screen; /* * 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 EditResourceAction(owner, handle, choices); } public void init(StateMachine m) { // Assertions. if (m == null) { String msg = "Argument 'm [StateMachine]' cannot be null."; throw new IllegalArgumentException(msg); } app = (BriefcaseApplicationContext) m.getContext(); fileScreen = m.getScreen(Handle.create("edit_file_details")); folderScreen = m.getScreen(Handle.create("addedit_folder")); screen = m.getScreen(Handle.create("folderview")); } 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 (log.isDebugEnabled()) { log.debug("Invoking Briefcase Action: " + getClass().getName()); } // Find & select the target. IDecisionCollection d_mff = decisions[0]; IChoiceCollection c_mff = d_mff.getChoiceCollection(); IDecision cl = d_mff.getDecision(c_mff.getChoice(net.unicon.penelope.Handle.create("editResource"))); String url = cl.getSelections()[0].getOption().getHandle().getValue(); EncryptionService encryptionService = app.getEncryptionService(); url = encryptionService.decrypt(url); BriefcaseUserContext user = (BriefcaseUserContext) ctx; ErrorMessage[] errors = new ErrorMessage[1]; String problem = ""; String msg = ""; String solution = null; boolean hasPermission = true; IResource target = null; try { target = AbstractResourceFactory.resourceFromUrl(url); user.setResourceSelection(new IResource[] { target }); IFolder f = (IFolder) user.getHistory().getLocation().getObject(); // Check to see if the user has edit permissions, otherwise, they cannot edit. /*List access = Arrays.asList(app.getAccessRules( user.getUsername(), f.getOwner())); if (!access.contains(new AccessRule(BriefcaseAccessType.EDIT, true))) { msg = "You do not have edit permissions."; problem = "Unable to edit '" + target.getName() + "'. " + msg; errors[0] = new ErrorMessage("other", problem, solution); hasPermission = false; }*/ } catch (DemetriusException e) { msg = "The selected resource is currently not accessible."; problem = "Unable to edit the resource. " + msg; errors[0] = new ErrorMessage("other", problem, solution); hasPermission = false; e.printStackTrace(); } IActionResponse rslt = null; if (hasPermission) { // Choose whither to go. switch (target.getType().toInt()) { case ResourceType.FOLDER_SWITCHABLE: boolean shared = isShared((IFolder) target, user); rslt = new SimpleActionResponse(folderScreen, new EditFolderQuery((IFolder) target, shared, user.getHistory().getLocation().getDrive().isSharing(), app, user)); break; case ResourceType.FILE_SWITCHABLE: rslt = new SimpleActionResponse(fileScreen, new EditFileQuery((IFile) target, app, user)); break; } } else { rslt = new SimpleActionResponse(screen, new FolderQuery(user.getHistory().getLocation(), app, user, errors)); } return rslt; } /* * Package API. */ private EditResourceAction(IWarlockFactory owner, Handle handle, String[] choices) { super(owner, handle, choices); // Instance Members. this.app = null; this.fileScreen = null; this.folderScreen = null; this.screen = null; } private boolean isShared(IFolder target, BriefcaseUserContext user) { boolean rslt = false; // find out if the drive accessbroker has any entries. if (user.getHistory().getLocation().getDrive().isSharing()) { IAccessEntry[] entries = app.getSharedEntries(target, user.getUsername(), app.getDrive(user.getDriveSelection().getShareTarget())); if (entries.length > 0) { rslt = true; } } return rslt; } }