/*
 * RomRaider Open-Source Tuning, Logging and Reflashing
 * Copyright (C) 2006-2008 RomRaider.com
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

package com.romraider.swing;

import javax.swing.filechooser.FileFilter;
import java.io.File;
import java.util.Enumeration;
import java.util.Hashtable;

public class XMLFilter extends FileFilter {

    private Hashtable<String, FileFilter> filters = null;
    private String description = null;
    private String fullDescription = null;
    private boolean useExtensionsInDescription = true;

    public XMLFilter() {
        this.filters = new Hashtable<String, FileFilter>();
        this.addExtension("xml");
        this.setDescription("ECU Definition Files");
    }

    public boolean accept(File f) {
        if (f != null) {
            if (f.isDirectory()) {
                return true;
            }
            String extension = getExtension(f);
            if (extension != null && filters.get(getExtension(f)) != null) {
                return true;
            }
            ;
        }
        return false;
    }

    public String getExtension(File f) {
        if (f != null) {
            String filename = f.getName();
            int i = filename.lastIndexOf('.');
            if (i > 0 && i < filename.length() - 1) {
                return filename.substring(i + 1).toLowerCase();
            }
            ;
        }
        return null;
    }

    public void addExtension(String extension) {
        filters.put(extension.toLowerCase(), this);
        fullDescription = null;
    }

    public String getDescription() {
        if (fullDescription == null) {
            if (description == null || isExtensionListInDescription()) {
                fullDescription = description == null ? "(" : description
                        + " (";
                // build the description from the extension list
                Enumeration<String> extensions = filters.keys();
                if (extensions != null) {
                    fullDescription += "." + extensions.nextElement();
                    while (extensions.hasMoreElements()) {
                        fullDescription += ", ."
                                + extensions.nextElement();
                    }
                }
                fullDescription += ")";
            } else {
                fullDescription = description;
            }
        }
        return fullDescription;
    }

    public void setDescription(String description) {
        this.description = description;
        fullDescription = null;
    }

    public void setExtensionListInDescription(boolean b) {
        useExtensionsInDescription = b;
        fullDescription = null;
    }

    public boolean isExtensionListInDescription() {
        return useExtensionsInDescription;
    }
}