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 */ 017 package org.apache.commons.io.filefilter; 018 019 import java.io.File; 020 import java.io.Serializable; 021 022 /** 023 * A file filter that always returns false. 024 * 025 * @since 1.0 026 * @version $Id: FalseFileFilter.java 1304058 2012-03-22 21:02:43Z sebb $ 027 * 028 * @see FileFilterUtils#falseFileFilter() 029 */ 030 public class FalseFileFilter implements IOFileFilter, Serializable { 031 032 /** 033 * Singleton instance of false filter. 034 * @since 1.3 035 */ 036 public static final IOFileFilter FALSE = new FalseFileFilter(); 037 /** 038 * Singleton instance of false filter. 039 * Please use the identical FalseFileFilter.FALSE constant. 040 * The new name is more JDK 1.5 friendly as it doesn't clash with other 041 * values when using static imports. 042 */ 043 public static final IOFileFilter INSTANCE = FALSE; 044 045 /** 046 * Restrictive consructor. 047 */ 048 protected FalseFileFilter() { 049 } 050 051 /** 052 * Returns false. 053 * 054 * @param file the file to check (ignored) 055 * @return false 056 */ 057 public boolean accept(File file) { 058 return false; 059 } 060 061 /** 062 * Returns false. 063 * 064 * @param dir the directory to check (ignored) 065 * @param name the filename (ignored) 066 * @return false 067 */ 068 public boolean accept(File dir, String name) { 069 return false; 070 } 071 072 }