AudioFileFilter.java

/*
 * Entagged Audio Tag library
 * Copyright (c) 2003-2005 Raphael Slinckx <raphael@slinckx.net>
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *  
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
package org.jaudiotagger.audio;

import org.jaudiotagger.audio.generic.Utils;

import java.io.FileFilter;
import java.io.File;

/**
 * <p>This is a simple FileFilter that will only allow the file supported by this library.</p>
 * <p>It will also accept directories. An additional condition is that file must be readable (read permission) and
 * are not hidden (dot files, or hidden files)</p>
 *
 * @author Raphael Slinckx
 * @version $Id: AudioFileFilter.java 836 2009-11-12 15:44:07Z paultaylor $
 * @since v0.01
 */
public class AudioFileFilter implements FileFilter {
    /**
     * allows Directories
     */
    private final boolean allowDirectories;

    public AudioFileFilter(boolean allowDirectories) {
        this.allowDirectories = allowDirectories;
    }

    public AudioFileFilter() {
        this(true);
    }

    /**
     * <p>Check whether the given file meet the required conditions (supported by the library OR directory).
     * The File must also be readable and not hidden.</p>
     *
     * @param f The file to test
     * @return a boolean indicating if the file is accepted or not
     */
    public boolean accept(File f) {
        if (f.isHidden() || !f.canRead()) {
            return false;
        }

        if (f.isDirectory()) {
            return allowDirectories;
        }

        String ext = Utils.getExtension(f);

        try {
            if (SupportedFileFormat.valueOf(ext.toUpperCase()) != null) {
                return true;
            }
        } catch (IllegalArgumentException iae) {
            //Not known enum value
            return false;
        }
        return false;
    }
}