AddAntlrNatureAction.java

/*******************************************************************************
 * Copyright (c) 2007, 2008 Edgar Espina.
 * 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
 *
 
 *******************************************************************************/
package org.deved.antlride.internal.ui;

import java.util.Iterator;

import org.deved.antlride.core.AntlrNature;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IProjectDescription;
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.ui.IObjectActionDelegate;
import org.eclipse.ui.IWorkbenchPart;

public class AddAntlrNatureAction implements IObjectActionDelegate {

	private ISelection selection;

	public void run(IAction action) {
		if (selection instanceof IStructuredSelection) {
			IStructuredSelection structuredSelection = (IStructuredSelection) selection;
			@SuppressWarnings("unchecked")
			Iterator<Object> iterator = structuredSelection.iterator();
			for (; iterator.hasNext();) {
				Object element = iterator.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) {
					enableNature(project);
				}
			}
		}
	}

	public void selectionChanged(IAction action, ISelection selection) {
		this.selection = selection;
	}

	public void setActivePart(IAction action, IWorkbenchPart targetPart) {
	}

	/**
	 * Toggles sample nature on a project
	 * 
	 * @param project
	 *            to have sample nature added or removed
	 */
	private void enableNature(IProject project) {
		try {
			IProjectDescription description = project.getDescription();
			String[] natures = description.getNatureIds();
			// Add the nature
			String[] newNatures = new String[natures.length + 1];
			System.arraycopy(natures, 0, newNatures, 0, natures.length);
			newNatures[natures.length] = AntlrNature.NATURE_ID;
			description.setNatureIds(newNatures);
			project.setDescription(description, null);
		} catch (CoreException e) {
		}
	}

}