core/plugins/org.eclipse.dltk.core/utils/org/eclipse/dltk/utils/ResourceUtil.java

/*******************************************************************************
 * Copyright (c) 2010, 2013 xored software, Inc and others.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0.
 * 
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     xored software, Inc. - initial API and Implementation (Alex Panchenko)
 *     NumberFour AG - createFolder() added (Alex Panchenko)
 *******************************************************************************/
package org.eclipse.dltk.utils;

import org.eclipse.core.resources.IContainer;
import org.eclipse.core.resources.IFolder;
import org.eclipse.core.resources.IProject;
import org.eclipse.core.resources.IProjectDescription;
import org.eclipse.core.resources.IResource;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.OperationCanceledException;

public class ResourceUtil {

	public static void addNature(IProject project, IProgressMonitor monitor,
			String nature) throws CoreException {
		if (monitor != null && monitor.isCanceled()) {
			throw new OperationCanceledException();
		}
		if (!project.hasNature(nature)) {
			IProjectDescription description = project.getDescription();
			String[] prevNatures = description.getNatureIds();
			String[] newNatures = new String[prevNatures.length + 1];
			System.arraycopy(prevNatures, 0, newNatures, 0, prevNatures.length);
			newNatures[prevNatures.length] = nature;
			description.setNatureIds(newNatures);
			project.setDescription(description, monitor);
		} else {
			if (monitor != null) {
				monitor.worked(1);
			}
		}
	}

	/**
	 * Creates a folder and all parent folders if not existing.
	 */
	public static void createFolder(IFolder folder, IProgressMonitor monitor)
			throws CoreException {
		if (!folder.exists()) {
			final IContainer parent = folder.getParent();
			if (parent instanceof IFolder) {
				createFolder((IFolder) parent, null);
			}
			folder.create(IResource.FORCE, true, monitor);
		}
	}
}