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/*****************************************************************************
* Copyright (c) 2013 CEA LIST.
*
*
* 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:
* Laurent Wouters laurent.wouters@cea.fr - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.infra.viewpoints.policy;
import org.eclipse.emf.ecore.EObject;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.papyrus.infra.emf.utils.EMFHelper;
import org.eclipse.ui.IWorkbenchWindow;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.actions.CompoundContributionItem;
/**
* Represent the dynamic contribution of a policy to some UI elements
*
* @author Laurent Wouters
*/
public abstract class DynamicContribution extends CompoundContributionItem {
/**
* Creation message prefix
*/
protected static final String CREATE_MESSAGE = "Create a new ";
/**
* Constructor.
*/
protected DynamicContribution() {
}
/**
* Constructor.
*/
protected DynamicContribution(String id) {
}
/**
* @see org.eclipse.ui.actions.CompoundContributionItem#isDynamic()
*/
@Override
public boolean isDynamic() {
return true;
}
/**
* Gets the current selection as an EObject
*
* @return The current selection, or <code>null</code> if it is not an EObject
*/
protected EObject getSelection() {
IWorkbenchWindow window = PlatformUI.getWorkbench().getActiveWorkbenchWindow();
if (window == null) {
return null;
}
ISelection selection = window.getSelectionService().getSelection();
if (selection == null) {
return null;
}
if (selection.isEmpty()) {
return null;
}
if (selection instanceof IStructuredSelection) {
IStructuredSelection struct = (IStructuredSelection) selection;
Object obj = struct.getFirstElement();
return EMFHelper.getEObject(obj);
}
return null;
}
}
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