    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 1.5 2007/11/02 17:50:36 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 */
    044package org.jfree.ui;
    045
    046import java.io.File;
    047import javax.swing.filechooser.FileFilter;
    048
    049/**
    050 * A filter for JFileChooser that filters files by extension.
    051 *
    052 * @author David Gilbert
    053 */
    054public class ExtensionFileFilter extends FileFilter {
    055
    056    /** A description for the file type. */
    057    private String description;
    058
    059    /** The extension (for example, "png" for *.png files). */
    060    private String extension;
    061
    062    /**
    063     * Standard constructor.
    064     *
    065     * @param description  a description of the file type;
    066     * @param extension  the file extension;
    067     */
    068    public ExtensionFileFilter(final String description, final String extension) {
    069        this.description = description;
    070        this.extension = extension;
    071    }
    072
    073    /**
    074     * Returns true if the file ends with the specified extension.
    075     *
    076     * @param file  the file to test.
    077     *
    078     * @return A boolean that indicates whether or not the file is accepted by the filter.
    079     */
    080    public boolean accept(final File file) {
    081
    082        if (file.isDirectory()) {
    083            return true;
    084        }
    085
    086        final String name = file.getName().toLowerCase();
    087        if (name.endsWith(this.extension)) {
    088            return true;
    089        }
    090        else {
    091            return false;
    092        }
    093
    094    }
    095
    096    /**
    097     * Returns the description of the filter.
    098     *
    099     * @return a description of the filter.
    100     */
    101    public String getDescription() {
    102        return this.description;
    103    }
    104
    105}