com.igormaznitsa.zxpoly.utils.AppOptions.java Source code

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Here is the source code for com.igormaznitsa.zxpoly.utils.AppOptions.java

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/*
 * Copyright (C) 2015 Raydac Research Group Ltd.
 *
 * 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 3 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, see <http://www.gnu.org/licenses/>.
 */
package com.igormaznitsa.zxpoly.utils;

import java.io.File;
import java.util.prefs.BackingStoreException;
import java.util.prefs.Preferences;
import org.apache.commons.io.FileUtils;

public final class AppOptions {
    private final Preferences preferences = Preferences.userNodeForPackage(AppOptions.class);

    private static final String ROMPATH = "ROM_PATH";
    private static final AppOptions INSTANCE = new AppOptions();
    private static final String APP_FOLDER_NAME = ".zxpolyemul";

    public static AppOptions getInstance() {
        return INSTANCE;
    }

    public synchronized String getActiveRom() {
        return preferences.get(ROMPATH, null);
    }

    public synchronized void setActiveRom(final String romPath) {
        preferences.put(ROMPATH, romPath);
    }

    public synchronized void flush() throws BackingStoreException {
        preferences.flush();
    }

    public synchronized File getAppConfigFolder() {
        String folder = System.getenv("APPDATA");
        if (folder == null) {
            folder = System.getProperty("user.home", FileUtils.getTempDirectoryPath());
        }

        final File cfgfolder = new File(folder, APP_FOLDER_NAME);
        if (!cfgfolder.exists())
            cfgfolder.mkdirs();
        return cfgfolder;
    }

}