001    /* ========================================================================
002     * JCommon : a free general purpose class library for the Java(tm) platform
003     * ========================================================================
004     *
005     * (C) Copyright 2000-2005, by Object Refinery Limited and Contributors.
006     * 
007     * Project Info:  http://www.jfree.org/jcommon/index.html
008     *
009     * This library is free software; you can redistribute it and/or modify it 
010     * under the terms of the GNU Lesser General Public License as published by 
011     * the Free Software Foundation; either version 2.1 of the License, or 
012     * (at your option) any later version.
013     *
014     * This library is distributed in the hope that it will be useful, but 
015     * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 
016     * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public 
017     * License for more details.
018     *
019     * You should have received a copy of the GNU Lesser General Public
020     * License along with this library; if not, write to the Free Software
021     * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, 
022     * USA.  
023     *
024     * [Java is a trademark or registered trademark of Sun Microsystems, Inc. 
025     * in the United States and other countries.]
026     * 
027     * ------------------------
028     * ExtensionFileFilter.java
029     * ------------------------
030     * (C) Copyright 2000-2004, by Object Refinery Limited.
031     *
032     * Original Author:  David Gilbert (for Object Refinery Limited);
033     * Contributor(s):   -;
034     *
035     * $Id: ExtensionFileFilter.java,v 1.4 2005/11/16 15:58:41 taqua Exp $
036     *
037     * Changes (from 26-Oct-2001)
038     * --------------------------
039     * 26-Oct-2001 : Changed package to com.jrefinery.ui.* (DG);
040     * 26-Jun-2002 : Updated imports (DG);
041     * 14-Oct-2002 : Fixed errors reported by Checkstyle (DG);
042     *
043     */
044    package org.jfree.ui;
045    
046    import java.io.File;
047    
048    import javax.swing.filechooser.FileFilter;
049    
050    /**
051     * A filter for JFileChooser that filters files by extension.
052     *
053     * @author David Gilbert
054     */
055    public class ExtensionFileFilter extends FileFilter {
056    
057        /** A description for the file type. */
058        private String description;
059    
060        /** The extension (for example, "png" for *.png files). */
061        private String extension;
062    
063        /**
064         * Standard constructor.
065         *
066         * @param description  a description of the file type;
067         * @param extension  the file extension;
068         */
069        public ExtensionFileFilter(final String description, final String extension) {
070            this.description = description;
071            this.extension = extension;
072        }
073    
074        /**
075         * Returns true if the file ends with the specified extension.
076         *
077         * @param file  the file to test.
078         *
079         * @return A boolean that indicates whether or not the file is accepted by the filter.
080         */
081        public boolean accept(final File file) {
082    
083            if (file.isDirectory()) {
084                return true;
085            }
086    
087            final String name = file.getName().toLowerCase();
088            if (name.endsWith(this.extension)) {
089                return true;
090            }
091            else {
092                return false;
093            }
094    
095        }
096    
097        /**
098         * Returns the description of the filter.
099         *
100         * @return a description of the filter.
101         */
102        public String getDescription() {
103            return this.description;
104        }
105    
106    }