core/plugins/org.eclipse.dltk.ui/src/org/eclipse/dltk/internal/ui/filters/LibraryFilter.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.core.resources.IProject;
import org.eclipse.core.resources.IResource;
import org.eclipse.dltk.core.IProjectFragment;
import org.eclipse.dltk.internal.ui.scriptview.BuildPathContainer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.jface.viewers.ViewerFilter;

/**
 * The LibraryFilter is a filter used to determine whether
 * a script library is shown
 */
public class LibraryFilter extends ViewerFilter {

	@Override
	public boolean select(Viewer viewer, Object parentElement, Object element) {
		if (element instanceof BuildPathContainer)
			return false;
		if (element instanceof IProjectFragment) {
			IProjectFragment root= (IProjectFragment)element;
			if (root.isArchive()) {
				// don't filter out archives contained in the project itself
				IResource resource= root.getResource();
				if (resource != null) {
					IProject archiveProject= resource.getProject();
					IProject container= root.getScriptProject().getProject();
					return container.equals(archiveProject);
				}
				return false;
			}
		}
		return true;
	}
}