| /******************************************************************************* |
| * Copyright (c) 2004, 2006 Sybase, Inc. and others. |
| * |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * Sybase, Inc. - initial API and implementation |
| *******************************************************************************/ |
| |
| |
| package org.eclipse.jst.jsf.facesconfig.ui.pageflow.command; |
| |
| import org.eclipse.jst.jsf.facesconfig.ui.pageflow.layout.PageflowLayoutManager; |
| import org.eclipse.jst.jsf.facesconfig.ui.pageflow.model.Pageflow; |
| import org.eclipse.jst.jsf.facesconfig.ui.pageflow.util.PageflowValidation; |
| |
| /** |
| * Add a new connection |
| * |
| * @author hmeng |
| * |
| */ |
| public class AddConnectionCommand extends ConnectionCommand { |
| |
| public boolean canExecute() { |
| // if user don't set PFLink object before, this command can't be |
| // executed. |
| if (link == null) { |
| return false; |
| } |
| |
| // It is a connection create command |
| if (oldSource == null && oldTarget == null) { |
| // It is a connection create command |
| // Source and target must be pointing to some |
| // real connection point |
| if (source == null || target == null) { |
| return false; |
| } |
| |
| if (!PageflowValidation.getInstance().isValidLinkForCreation( |
| source, target)) { |
| return false; |
| } |
| } |
| return true; |
| } |
| |
| public void doExecute() { |
| // It is a connection create command |
| if (canExecute() && oldSource == null && oldTarget == null) { |
| Pageflow pageflow = null; |
| // Get a reference to the pageflow |
| if (source != null) { |
| pageflow = source.getPageflow(); |
| } else if (target != null) { |
| pageflow = target.getPageflow(); |
| } |
| pageflow.connect(source, target, link); |
| |
| // self loop link |
| if (source == target) { |
| PageflowLayoutManager.updateSelfLoopLink(link); |
| } |
| } |
| } |
| |
| public void redo() { |
| // TODO Auto-generated method stub |
| super.redo(); |
| } |
| |
| public void undo() { |
| if (canExecute()) { |
| // It was a connection create command |
| if (oldSource == null && oldTarget == null) { |
| |
| Pageflow pageflow = null; |
| // Get a reference to the pageflow |
| if (source != null) { |
| pageflow = source.getPageflow(); |
| } else if (target != null) { |
| pageflow = target.getPageflow(); |
| } |
| |
| // Ensure that link knows nothing about nodes anymore. |
| link.setSource(null); |
| link.setTarget(null); |
| // Remove link from pageflow |
| pageflow.getLinks().remove(link); |
| } |
| } |
| } |
| |
| } |