001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 * 
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 * 
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.commons.io.filefilter;
018
019import java.io.File;
020import java.io.Serializable;
021
022/**
023 * A file filter that always returns false.
024 *
025 * @since 1.0
026 * @version $Id: FalseFileFilter.java 1642757 2014-12-01 21:09:30Z sebb $
027 *
028 * @see FileFilterUtils#falseFileFilter()
029 */
030public class FalseFileFilter implements IOFileFilter, Serializable {
031
032    private static final long serialVersionUID = 6210271677940926200L;
033    /**
034     * Singleton instance of false filter.
035     * @since 1.3
036     */
037    public static final IOFileFilter FALSE = new FalseFileFilter();
038    /**
039     * Singleton instance of false filter.
040     * Please use the identical FalseFileFilter.FALSE constant.
041     * The new name is more JDK 1.5 friendly as it doesn't clash with other
042     * values when using static imports.
043     */
044    public static final IOFileFilter INSTANCE = FALSE;
045
046    /**
047     * Restrictive consructor.
048     */
049    protected FalseFileFilter() {
050    }
051
052    /**
053     * Returns false.
054     *
055     * @param file  the file to check (ignored)
056     * @return false
057     */
058    public boolean accept(final File file) {
059        return false;
060    }
061
062    /**
063     * Returns false.
064     *
065     * @param dir  the directory to check (ignored)
066     * @param name  the filename (ignored)
067     * @return false
068     */
069    public boolean accept(final File dir, final String name) {
070        return false;
071    }
072
073}