001 /* FileFilter.java --
002 Copyright (C) 2002, 2005, 2006, Free Software Foundation, Inc.
003
004 This file is part of GNU Classpath.
005
006 GNU Classpath is free software; you can redistribute it and/or modify
007 it under the terms of the GNU General Public License as published by
008 the Free Software Foundation; either version 2, or (at your option)
009 any later version.
010
011 GNU Classpath is distributed in the hope that it will be useful, but
012 WITHOUT ANY WARRANTY; without even the implied warranty of
013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014 General Public License for more details.
015
016 You should have received a copy of the GNU General Public License
017 along with GNU Classpath; see the file COPYING. If not, write to the
018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019 02110-1301 USA.
020
021 Linking this library statically or dynamically with other modules is
022 making a combined work based on this library. Thus, the terms and
023 conditions of the GNU General Public License cover the whole
024 combination.
025
026 As a special exception, the copyright holders of this library give you
027 permission to link this library with independent modules to produce an
028 executable, regardless of the license terms of these independent
029 modules, and to copy and distribute the resulting executable under
030 terms of your choice, provided that you also meet, for each linked
031 independent module, the terms and conditions of the license of that
032 module. An independent module is a module which is not derived from
033 or based on this library. If you modify this library, you may extend
034 this exception to your version of the library, but you are not
035 obligated to do so. If you do not wish to do so, delete this
036 exception statement from your version. */
037
038
039 package javax.swing.filechooser;
040
041 import java.io.File;
042
043 import javax.swing.JFileChooser;
044
045 /**
046 * The base class for filters that control the visibility of files in the
047 * {@link JFileChooser} component.
048 *
049 * @see JFileChooser#addChoosableFileFilter(FileFilter)
050 *
051 * @author Andrew Selkirk
052 */
053 public abstract class FileFilter
054 {
055
056 /**
057 * Default constructor.
058 */
059 public FileFilter()
060 {
061 // Nothing to do here.
062 }
063
064 /**
065 * Returns <code>true</code> if the specified file matches the filter, and
066 * <code>false</code> otherwise.
067 *
068 * @param file the file.
069 *
070 * @return A boolean.
071 */
072 public abstract boolean accept(File file);
073
074 /**
075 * Returns a description of the files that will be selected by the filter
076 * (for example, "Java source files"). This description will usually be
077 * displayed on the {@link JFileChooser} component, often in a combo box that
078 * is used to select the appropriate filter (in cases where more than one
079 * filter is available).
080 *
081 * @return A description of the filter.
082 */
083 public abstract String getDescription();
084
085 }