| /******************************************************************************* |
| * Copyright (c) 2000, 2005 IBM Corporation and others. |
| * 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 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.jdt.internal.ui.wizards; |
| |
| import org.eclipse.jface.util.Assert; |
| import org.eclipse.jface.viewers.Viewer; |
| import org.eclipse.jface.viewers.ViewerFilter; |
| |
| /** |
| * Viewer filter used in selection dialogs. |
| */ |
| public class TypedViewerFilter extends ViewerFilter { |
| |
| private Class[] fAcceptedTypes; |
| private Object[] fRejectedElements; |
| |
| /** |
| * Creates a filter that only allows elements of gives types. |
| * @param acceptedTypes The types of accepted elements |
| */ |
| public TypedViewerFilter(Class[] acceptedTypes) { |
| this(acceptedTypes, null); |
| } |
| |
| /** |
| * Creates a filter that only allows elements of gives types, but not from a |
| * list of rejected elements. |
| * @param acceptedTypes Accepted elements must be of this types |
| * @param rejectedElements Element equals to the rejected elements are |
| * filtered out |
| */ |
| public TypedViewerFilter(Class[] acceptedTypes, Object[] rejectedElements) { |
| Assert.isNotNull(acceptedTypes); |
| fAcceptedTypes= acceptedTypes; |
| fRejectedElements= rejectedElements; |
| } |
| |
| /** |
| * @see ViewerFilter#select(org.eclipse.jface.viewers.Viewer, java.lang.Object, java.lang.Object) |
| */ |
| public boolean select(Viewer viewer, Object parentElement, Object element) { |
| if (fRejectedElements != null) { |
| for (int i= 0; i < fRejectedElements.length; i++) { |
| if (element.equals(fRejectedElements[i])) { |
| return false; |
| } |
| } |
| } |
| for (int i= 0; i < fAcceptedTypes.length; i++) { |
| if (fAcceptedTypes[i].isInstance(element)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| } |