| /******************************************************************************* |
| * Copyright (c) 2000, 2010 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.gef.examples.flow.model.commands; |
| |
| import java.util.List; |
| |
| import org.eclipse.gef.commands.Command; |
| import org.eclipse.gef.examples.flow.model.Activity; |
| import org.eclipse.gef.examples.flow.model.Transition; |
| |
| /** |
| * Command that handles the reconnection of target Activities. |
| * |
| * @author Daniel Lee |
| */ |
| public class ReconnectTargetCommand extends Command { |
| |
| /** Source Activity **/ |
| protected Activity source; |
| /** Target Activity **/ |
| protected Activity target; |
| /** Transition between source and target **/ |
| protected Transition transition; |
| /** Previous target prior to command execution **/ |
| protected Activity oldTarget; |
| |
| /** |
| * @see org.eclipse.gef.commands.Command#canExecute() |
| */ |
| public boolean canExecute() { |
| if (transition.source.equals(target)) |
| return false; |
| |
| List transitions = source.getOutgoingTransitions(); |
| for (int i = 0; i < transitions.size(); i++) { |
| Transition trans = ((Transition) (transitions.get(i))); |
| if (trans.target.equals(target) && !trans.target.equals(oldTarget)) |
| return false; |
| } |
| return true; |
| } |
| |
| /** |
| * @see org.eclipse.gef.commands.Command#execute() |
| */ |
| public void execute() { |
| if (target != null) { |
| oldTarget.removeInput(transition); |
| transition.target = target; |
| target.addInput(transition); |
| } |
| } |
| |
| /** |
| * Returns the source Activity associated with this command |
| * |
| * @return the source Activity |
| */ |
| public Activity getSource() { |
| return source; |
| } |
| |
| /** |
| * Returns the target Activity associated with this command |
| * |
| * @return the target Activity |
| */ |
| public Activity getTarget() { |
| return target; |
| } |
| |
| /** |
| * Returns the Transition associated with this command |
| * |
| * @return the Transition |
| */ |
| public Transition getTransition() { |
| return transition; |
| } |
| |
| /** |
| * Sets the source Activity associated with this command |
| * |
| * @param activity |
| * the source Activity |
| */ |
| public void setSource(Activity activity) { |
| source = activity; |
| } |
| |
| /** |
| * Sets the target Activity assoicated with this command |
| * |
| * @param activity |
| * the target Activity |
| */ |
| public void setTarget(Activity activity) { |
| target = activity; |
| } |
| |
| /** |
| * Sets the transition associated with this |
| * |
| * @param trans |
| * the transition |
| */ |
| public void setTransition(Transition trans) { |
| transition = trans; |
| source = trans.source; |
| oldTarget = trans.target; |
| } |
| |
| /** |
| * @see org.eclipse.gef.commands.Command#undo() |
| */ |
| public void undo() { |
| target.removeInput(transition); |
| transition.target = oldTarget; |
| oldTarget.addInput(transition); |
| } |
| |
| } |