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.ArrayList; import java.util.List; import java.util.StringTokenizer; import net.unicon.academus.apps.ErrorMessage; import net.unicon.academus.apps.briefcase.BriefcaseAccessType; 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.AccessRule; import net.unicon.alchemist.encrypt.EncryptionService; import net.unicon.academus.apps.briefcase.Location; 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.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 GoToFolderAction extends AbstractWarlockFactory.AbstractAction { // Instance Members. private BriefcaseApplicationContext app; 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 GoToFolderAction(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(); 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 (decisions.length != 1) { String msg = "Argument 'decisions' must contain exactly one " + "element."; 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 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("goLocation"))); String url = cl.getSelections()[0].getOption().getHandle().getValue(); Location loc = null; // Decrypt url before using it EncryptionService encryptionService = app.getEncryptionService(); url = encryptionService.decrypt(url); BriefcaseUserContext user = (BriefcaseUserContext) ctx; List err = new ArrayList(); if (url.startsWith("FSA://")) { // IFolder... try { IFolder f = (IFolder) AbstractResourceFactory.resourceFromUrl(url); // check if user has view access (usefule in case of a shared factory) AccessRule[] access = user.getAccessRules(f.getOwner()); if (!FolderQuery.hasAccess(access, BriefcaseAccessType.VIEW)) { throw new RuntimeException("You do not have view access on the given resource. "); } loc = new Location(user.getDriveSelection(), f); } catch (Throwable t) { String problem = t.getMessage(); err.add(new ErrorMessage("other", problem, "")); t.printStackTrace(); return new SimpleActionResponse(screen, new FolderQuery(new Location(user.getDriveSelection()), app, user, (ErrorMessage[]) err.toArray(new ErrorMessage[err.size()]))); } } else { // Drive... Drive d = app.getDrive(url); loc = new Location(d); ((BriefcaseUserContext) ctx).setDriveSelection(d); } // Adjust the history. if (user.getHistory().getLocation().equals(loc)) { if (user.getHistory().isFolderOpen()) { user.getHistory().closeFolder(); } else { user.getHistory().openFolder(); } } else { if (loc.before(user.getHistory().getLocation())) { user.getHistory().closeFolder(); } else { user.getHistory().openFolder(); } user.getHistory().setLocation(loc); } // Clear the selection (if any). user.clearResourceSelection(); // Adjust the page. user.getFolderPaging().setCurrentPage(1); return new SimpleActionResponse(screen, new FolderQuery(loc, app, user)); } /* * Package API. */ private GoToFolderAction(IWarlockFactory owner, Handle handle, String[] choices) { super(owner, handle, choices); // Instance Members. this.app = null; this.screen = null; } }