| /******************************************************************************* |
| * Copyright (c) 2003, 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.jst.j2ee.internal.dialogs; |
| |
| import java.util.Hashtable; |
| |
| import org.eclipse.core.resources.IContainer; |
| import org.eclipse.core.resources.IFile; |
| import org.eclipse.core.resources.IResource; |
| import org.eclipse.core.runtime.CoreException; |
| import org.eclipse.jface.viewers.Viewer; |
| |
| public class TypedFileViewerFilter extends org.eclipse.jface.viewers.ViewerFilter { |
| private String[] fAcceptedExtensions; |
| private Hashtable visitedElements; |
| public TypedFileViewerFilter(String[] acceptedExtensions) { |
| fAcceptedExtensions = acceptedExtensions; |
| visitedElements = new Hashtable(); |
| } |
| public boolean isFilterProperty(Object element, Object property) { |
| return false; |
| } |
| public boolean isValid(Object element) { |
| if (IFile.class.isInstance(element)) |
| return isValidFile((IFile) element); |
| if (IContainer.class.isInstance(element)) |
| return isValidContainer((IContainer) element); |
| return false; |
| } |
| /* |
| * A valid container is one that contains at least one valid member. |
| */ |
| public boolean isValidContainer(IContainer container) { |
| IResource[] members; |
| Object valid = visitedElements.get(container); |
| if (valid != null) |
| return ((Boolean) valid).booleanValue(); |
| try { |
| members = container.members(); |
| for (int i = 0; i < members.length; i++) { |
| if (isValid(members[i])) { |
| visitedElements.put(container, Boolean.TRUE); |
| return true; |
| } |
| } |
| } catch (CoreException e) { |
| // Do nothing |
| } |
| visitedElements.put(container, Boolean.FALSE); |
| return false; |
| } |
| public boolean isValidFile(IFile file) { |
| String ext = file.getFileExtension(); |
| for (int i = 0; i < fAcceptedExtensions.length; i++) { |
| if (fAcceptedExtensions[i].equalsIgnoreCase(ext)) { |
| return true; |
| } |
| } |
| return false; |
| } |
| public boolean select(Viewer viewer, Object parentElement, Object element) { |
| return isValid(element); |
| } |
| } |