JavaPackageFragmentFilter.java

/**
 * Copyright 2004-2016 Riccardo Solmi. All rights reserved.
 * This file is part of the Whole Platform.
 *
 * The Whole Platform is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * The Whole Platform is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with the Whole Platform. If not, see <http://www.gnu.org/licenses/>.
 */
package org.whole.lang.ui.controls;

import org.eclipse.jdt.core.IJavaProject;
import org.eclipse.jdt.core.IPackageFragment;
import org.eclipse.jdt.core.IPackageFragmentRoot;
import org.eclipse.jdt.core.JavaModelException;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerFilter;

/**
 * @author Enrico Persiani
 */
public final class JavaPackageFragmentFilter extends ViewerFilter {
	@Override
	public boolean select(Viewer viewer, Object parentElement, Object element) {
		try {
			if (element instanceof IJavaProject ||
				element instanceof IPackageFragmentRoot)
				return true;
			else
				if (element instanceof IPackageFragment &&
						((IPackageFragment)element).containsJavaResources())
					return true;
				else
					return false;
		} catch (JavaModelException e) {
			return false;
		}
	}
}