package genUtils;

/*
 * Copyright 2002 by Mark A. Kobold
 *
 * The contents of this file are subject to the Mozilla Public License Version 1.1
 * (the "License"); you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the License.
 *
 * The Original Code is iSQL-Viewer, A Mutli-Platform Database Tool. 
 *
 * The Initial Developer of the Original Code is Markus A. Kobold.
 * 
 * Portions created by Mark A. Kobold are
 * Copyright (C) Copyright (C) 2000 Mark A. Kobold. All Rights Reserved.
 * Contributor(s): Mark A. Kobold  <mkobold@sprintpcs.com>.
 *
 * Contributor(s): all the names of the contributors are added in the source code
 * where applicable.
 *
 * If you didn't download this code from the following link, you should check if
 * you aren't using an obsolete version:
 * http://isql.sourceforge.net/
 */

import javax.swing.filechooser.FileFilter;
import java.io.File;
import java.text.MessageFormat;

public final class ExtensionFileFilter extends FileFilter {





/**
 * Simple class for creating file filters.
 * <p>
 * This class is used in conjunction with JFileChoosers.
 * @author Markus A. Kobold &lt;mkobold at sprintpcs dot com&gt;
 * @version 1.0
 * @see javax.swing.JFileChooser#addChoosableFileFilter(javax.swing.filechooser.FileFilter)
 */


    private String ext  = "";
    private String desc = "";

    /**
     * Default constructor.
     * <p>
     * Creates a files using the given extension and description for the type of
     * files this filters.
     * @param ext is the extenstion to use like &quot;txt&quot;
     * @param Desc Something that describes the file type to the user.
     */
    public ExtensionFileFilter(String ext, String description) {

        if (ext == null)
            throw new NullPointerException("File Extensions Cannont Be null");
        if (description == null)
            throw new NullPointerException("File Description Cannont Be null");
        this.ext = new String(ext);
        this.desc = MessageFormat.format("{0} (*.{1})", new String[]{
                description, ext
        });
    }

    public File applyExtension(File original) {

        return new File(original.getParentFile(), original.getName().concat(".".concat(ext)));
    }

    /**
     * @see javax.swing.filechooser.FileFilter#accept(java.io.File)
     */
    public boolean accept(File f) {

        if (f.canRead() || f.canWrite())
            return (f.getName().endsWith("." + ext) || f.isDirectory() || (f.isDirectory() && f.isHidden() && f
                    .getName().startsWith(".")));

        return false;
    }

    /**
     * @see javax.swing.filechooser.FileFilter#getDescription()
     */
    public String getDescription() {

        return desc;
    }

}