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.Arrays; import java.util.Iterator; 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.Location; import net.unicon.alchemist.access.AccessRule; import net.unicon.alchemist.encrypt.EncryptionService; import net.unicon.demetrius.DemetriusException; import net.unicon.demetrius.IFolder; import net.unicon.demetrius.IResource; import net.unicon.demetrius.OperationTimeoutException; 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.AbstractWarlockFactory; import net.unicon.warlock.fac.SimpleActionResponse; import org.dom4j.Attribute; import org.dom4j.Element; public final class CopyResourcesAction 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 CopyResourcesAction(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 (ctx == null) { String msg = "Argument 'ctx' cannot be null."; throw new IllegalArgumentException(msg); } if (log.isDebugEnabled()) { log.debug("Invoking Briefcase Action: " + getClass().getName()); } BriefcaseUserContext buc = (BriefcaseUserContext) ctx; IFolder f = (IFolder) buc.getHistory().getLocation().getObject(); // Error handling. List err = new ArrayList(); String msg; String problem; String solution; // Find the destination folder. IDecisionCollection dCol = decisions[0]; IChoiceCollection cCol = dCol.getChoiceCollection(); IDecision d = dCol.getDecision(cCol.getChoice(net.unicon.penelope.Handle.create("chooseDestination"))); ISelection[] sel = d.getSelections(); if (sel.length > 0) { EncryptionService encryptionService = app.getEncryptionService(); String decryptedUrl = sel[0].getOption().getHandle().getValue(); decryptedUrl = encryptionService.decrypt(decryptedUrl); IFolder destination = null; try { destination = (IFolder) AbstractResourceFactory.resourceFromUrl(decryptedUrl); // Make sure the user has create permission on the destination folder. List access = Arrays.asList(buc.getAccessRules(destination.getOwner())); if (!access.contains(new AccessRule(BriefcaseAccessType.ADD, true))) { msg = "User does not have 'create' access to the destination folder"; problem = "Unable to copy resoure to '" + destination.getName() + "'. " + msg; solution = "Please choose a different destination folder."; err.add(new ErrorMessage("other", problem, solution)); } } catch (DemetriusException de) { problem = "The selected destination folder is not accessible."; solution = "Please choose a different destination folder."; err.add(new ErrorMessage("other", problem, solution)); de.printStackTrace(); } if (err.size() > 0) { // Display the error. return new SimpleActionResponse(screen, new FolderQuery(buc.getHistory().getLocation(), app, buc, (ErrorMessage[]) err.toArray(new ErrorMessage[err.size()]))); } // Copy the (previously) selected items. Iterator it = Arrays.asList(buc.getResourceSelection()).iterator(); while (it.hasNext()) { IResource r = (IResource) it.next(); if (r.getParent().getUrl().equals(destination.getUrl())) { msg = "Original folder and destination folder are the same folder."; problem = "Unable to copy '" + r.getName() + "'. " + msg; solution = "Please choose a different destination folder."; err.add(new ErrorMessage("other", problem, solution)); } else { try { destination.getOwner().copy(r, destination, false); } catch (OperationTimeoutException ote) { err.add(new ErrorMessage("other", "Operation timed out.", "")); } catch (Exception e) { msg = e.getMessage(); problem = "Unable to copy '" + r.getName() + "'. " + msg; solution = ""; err.add(new ErrorMessage("other", problem, solution)); e.printStackTrace(); } } } } Location fromLocation = (Location) buc.getSession().getAttribute("fromLocation"); // Clean up the user context & session // Purge the move/copy related info buc.clearResourceSelection(); buc.getSession().removeAttribute("fromLocation"); buc.getSession().removeAttribute("destinationMode"); if (err.size() == 0) { return new SimpleActionResponse(screen, new FolderQuery(fromLocation, app, buc)); } else { // Display the error. return new SimpleActionResponse(screen, new FolderQuery(fromLocation, app, buc, (ErrorMessage[]) err.toArray(new ErrorMessage[err.size()]))); } } /* * Package API. */ private CopyResourcesAction(IWarlockFactory owner, Handle handle, String[] choices) { super(owner, handle, choices); // Instance Members. this.screen = null; } }