    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 */
    018
    019package org.apache.commons.net.ftp;
    020
    021import java.util.Objects;
    022
    023/**
    024 * Implements some simple FTPFileFilter classes.
    025 *
    026 * @since 2.2
    027 */
    028public class FTPFileFilters {
    029
    030    /**
    031     * Accepts all FTPFile entries, including null.
    032     */
    033    public static final FTPFileFilter ALL = file -> true;
    034
    035    /**
    036     * Accepts all non-null FTPFile entries.
    037     */
    038    public static final FTPFileFilter NON_NULL = Objects::nonNull;
    039
    040    /**
    041     * Accepts all (non-null) FTPFile directory entries.
    042     */
    043    public static final FTPFileFilter DIRECTORIES = file -> file != null && file.isDirectory();
    044
    045}