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