AbstractToggleNatureAction.java example

Explorer
ocl-master
/**
 * <copyright>
 * 
 * Copyright (c) 2007,2010 Eclipse Modeling Project 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:
 * E.D.Willink - initial API and implementation
 * 
 * </copyright>
 *
 * $Id: AbstractToggleNatureAction.java,v 1.1 2010/03/11 14:51:24 ewillink Exp $
 */
package org.eclipse.ocl.examples.editor.ui.builder;

import java.util.Iterator;

import org.eclipse.core.resources.IProject;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IAdaptable;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.IStructuredSelection;
import org.eclipse.ocl.examples.editor.ui.ICreationFactory;
import org.eclipse.ui.IObjectActionDelegate;
import org.eclipse.ui.IWorkbenchPart;

public abstract class AbstractToggleNatureAction implements IObjectActionDelegate
{
	protected final ICreationFactory creationFactory;
	private ISelection selection;

	protected AbstractToggleNatureAction(ICreationFactory creationFactory) {
		this.creationFactory = creationFactory;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.IActionDelegate#run(org.eclipse.jface.action.IAction)
	 */
	public void run(IAction action) {
		if (selection instanceof IStructuredSelection) {
			for (Iterator<?> it = ((IStructuredSelection) selection).iterator(); it.hasNext();) {
				Object element = it.next();
				IProject project = null;
				if (element instanceof IProject) {
					project = (IProject) element;
				} else if (element instanceof IAdaptable) {
					project = (IProject) ((IAdaptable) element)
							.getAdapter(IProject.class);
				}
				if (project != null) {
					toggleNature(project);
				}
			}
		}
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.IActionDelegate#selectionChanged(org.eclipse.jface.action.IAction,
	 *      org.eclipse.jface.viewers.ISelection)
	 */
	public void selectionChanged(IAction action, ISelection selection) {
		this.selection = selection;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.ui.IObjectActionDelegate#setActivePart(org.eclipse.jface.action.IAction,
	 *      org.eclipse.ui.IWorkbenchPart)
	 */
	public void setActivePart(IAction action, IWorkbenchPart targetPart) {
	}

	protected void toggleNature(IProject project) {
		String natureId = creationFactory.getNatureId();
		try {
			CommonNature nature = creationFactory.createNature();
			if (!nature.removeFromProject(project))
				nature.addToProject(project);
		} catch (CoreException e) {
			creationFactory.getPlugin().logException("Failed to toggle nature " + natureId, e);
		}
	}
}