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     * This filter accepts <code>File</code>s that are files (not directories).
024     * <p>
025     * For example, here is how to print out a list of the real files
026     * within the current directory:
027     *
028     * <pre>
029     * File dir = new File(".");
030     * String[] files = dir.list( FileFileFilter.FILE );
031     * for ( int i = 0; i &lt; files.length; i++ ) {
032     *     System.out.println(files[i]);
033     * }
034     * </pre>
035     *
036     * @since Commons IO 1.3
037     * @version $Revision: 155419 $ $Date: 2007-10-24 16:53:07 +0100 (Wed, 24 Oct 2007) $
038     */
039    public class FileFileFilter extends AbstractFileFilter implements Serializable {
040    
041        /** Singleton instance of file filter */
042        public static final IOFileFilter FILE = new FileFileFilter();
043    
044        /**
045         * Restrictive consructor.
046         */
047        protected FileFileFilter() {
048        }
049    
050        /**
051         * Checks to see if the file is a file.
052         *
053         * @param file  the File to check
054         * @return true if the file is a file
055         */
056        public boolean accept(File file) {
057            return file.isFile();
058        }
059    
060    }