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 true. 024 * 025 * @since 1.0 026 * 027 * @see FileFilterUtils#trueFileFilter() 028 */ 029public class TrueFileFilter implements IOFileFilter, Serializable { 030 031 private static final long serialVersionUID = 8782512160909720199L; 032 /** 033 * Singleton instance of true filter. 034 * @since 1.3 035 */ 036 public static final IOFileFilter TRUE = new TrueFileFilter(); 037 /** 038 * Singleton instance of true filter. 039 * Please use the identical TrueFileFilter.TRUE 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 = TRUE; 044 045 /** 046 * Restrictive constructor. 047 */ 048 protected TrueFileFilter() { 049 } 050 051 /** 052 * Returns true. 053 * 054 * @param file the file to check (ignored) 055 * @return true 056 */ 057 @Override 058 public boolean accept(final File file) { 059 return true; 060 } 061 062 /** 063 * Returns true. 064 * 065 * @param dir the directory to check (ignored) 066 * @param name the file name (ignored) 067 * @return true 068 */ 069 @Override 070 public boolean accept(final File dir, final String name) { 071 return true; 072 } 073 074}