core/plugins/org.eclipse.dltk.ui/src/org/eclipse/dltk/internal/ui/filters/ContainMembersFilter.java

/*******************************************************************************
 * Copyright (c) 2000, 2017 IBM Corporation 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
 *
 *******************************************************************************/
package org.eclipse.dltk.internal.ui.filters;

import org.eclipse.dltk.core.DLTKCore;
import org.eclipse.dltk.core.IScriptFolder;
import org.eclipse.dltk.core.ModelException;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerFilter;

/**
 * Filters out all compilation units and class files elements.
 */
public class ContainMembersFilter extends ViewerFilter {

	/**
	 * Returns the result of this filter, when applied to the given inputs.
	 *
	 * @return Returns true if element should be included in filtered set
	 */
	@Override
	public boolean select(Viewer viewer, Object parent, Object element) {
		if (element instanceof IScriptFolder) {
			try {
				return ((IScriptFolder) element).getSourceModules().length > 0;
			} catch (ModelException e) {
				if (DLTKCore.DEBUG) {
					e.printStackTrace();
				}
			}
		}
		return true;
	}
}