| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.commons.vfs2.filter; |
| |
| import java.io.Serializable; |
| |
| import org.apache.commons.vfs2.FileFilter; |
| import org.apache.commons.vfs2.FileSelectInfo; |
| import org.apache.commons.vfs2.FileSystemException; |
| |
| /** |
| * This filter accepts {@code File}s that are hidden. |
| * <p> |
| * Example, showing how to print out a list of the current directory's |
| * <i>hidden</i> files: |
| * </p> |
| * |
| * <pre> |
| * FileSystemManager fsManager = VFS.getManager(); |
| * FileObject dir = fsManager.toFileObject(new File(".")); |
| * FileObject[] files = dir.findFiles(new FileFilterSelector(HiddenFileFilter.HIDDEN)); |
| * for (int i = 0; i < files.length; i++) { |
| * System.out.println(files[i]); |
| * } |
| * </pre> |
| * |
| * <p> |
| * Example, showing how to print out a list of the current directory's |
| * <i>visible</i> (i.e. not hidden) files: |
| * </p> |
| * |
| * <pre> |
| * FileSystemManager fsManager = VFS.getManager(); |
| * FileObject dir = fsManager.toFileObject(new File(".")); |
| * FileObject[] files = dir.findFiles(new FileFilterSelector(HiddenFileFilter.VISIBLE)); |
| * for (int i = 0; i < files.length; i++) { |
| * System.out.println(files[i]); |
| * } |
| * </pre> |
| * |
| * @author This code was originally ported from Apache Commons IO File Filter |
| * @see "http://commons.apache.org/proper/commons-io/" |
| * @since 2.4 |
| */ |
| public class HiddenFileFilter implements FileFilter, Serializable { |
| |
| private static final long serialVersionUID = 1L; |
| |
| /** Singleton instance of <i>hidden</i> filter. */ |
| public static final FileFilter HIDDEN = new HiddenFileFilter(); |
| |
| /** Singleton instance of <i>visible</i> filter. */ |
| public static final FileFilter VISIBLE = new NotFileFilter(HIDDEN); |
| |
| /** |
| * Restrictive constructor. |
| */ |
| protected HiddenFileFilter() { |
| } |
| |
| /** |
| * Checks to see if the file is hidden. Non existing files won't be accepted. |
| * |
| * @param fileSelectInfo the File to check |
| * |
| * @return {@code true} if the file is <i>hidden</i>, otherwise {@code false}. |
| * @throws FileSystemException Thrown for file system errors. |
| */ |
| @Override |
| public boolean accept(final FileSelectInfo fileSelectInfo) throws FileSystemException { |
| if (!fileSelectInfo.getFile().exists()) { |
| return false; |
| } |
| return fileSelectInfo.getFile().isHidden(); |
| } |
| |
| } |