Java tutorial
/* * Copyright (C) 2014 Alejandro Ayuso * * 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. * * 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 jobhunter.controllers; import java.io.File; import java.util.Arrays; import java.util.List; import java.util.prefs.BackingStoreException; import java.util.prefs.Preferences; import jobhunter.utils.ApplicationState; import org.apache.commons.lang3.StringUtils; import org.slf4j.Logger; import org.slf4j.LoggerFactory; /** * Controller to handle java.util.prefs.Preferences operations */ public enum PreferencesController { _INSTANCE; private static final Logger l = LoggerFactory.getLogger(PreferencesController.class); private static final String DEFAULT_PORTALS = "Xing, LinkedIn, Monster"; public static final String PORTALS_PROPERTY = "portals"; public static final String LAST_FILE_PATH_PROPERTY = "last-file-path"; public static final String AUTOSAVE_PROPERTY = "autosave"; public static final String AUTOUPDATE_PROPERTY = "autoupdate"; private final Preferences current; private PreferencesController() { this.current = ApplicationState.isDevelopment() ? Preferences.userRoot().node("jobhunter-dev") : Preferences.userRoot().node("jobhunter"); } public static void init() { Boolean isFirstTime = Boolean.TRUE; try { isFirstTime = getCurrent().keys().length == 0; } catch (BackingStoreException e) { l.error("Error loading preferences file", e); } if (isFirstTime) { l.debug("First time we run. Create default configuration"); generate(); } } private static void generate() { getCurrent().put(LAST_FILE_PATH_PROPERTY, ""); getCurrent().put(PORTALS_PROPERTY, DEFAULT_PORTALS); getCurrent().putBoolean(AUTOSAVE_PROPERTY, false); getCurrent().putBoolean(AUTOUPDATE_PROPERTY, true); } public static void setLastFilePath(final String value) { getCurrent().put(LAST_FILE_PATH_PROPERTY, value); } public static void setLastFilePath(final File value) { getCurrent().put(LAST_FILE_PATH_PROPERTY, value.getAbsolutePath()); } public static Boolean isLastFilePathSet() { return !getCurrent().get(LAST_FILE_PATH_PROPERTY, "").isEmpty(); } public static String getLastFilePath() { return getCurrent().get(LAST_FILE_PATH_PROPERTY, null); } public static void setPortals(final String value) { getCurrent().put(PORTALS_PROPERTY, value); } public static String getPortals() { return getCurrent().get(PORTALS_PROPERTY, DEFAULT_PORTALS); } public static Boolean isAutosave() { return getCurrent().getBoolean(AUTOSAVE_PROPERTY, false); } public static void setAutosave(final Boolean bool) { getCurrent().putBoolean(AUTOSAVE_PROPERTY, bool); } public static Boolean isAutoupdate() { return getCurrent().getBoolean(AUTOUPDATE_PROPERTY, true); } public static void setAutoupdate(final Boolean bool) { getCurrent().putBoolean(AUTOUPDATE_PROPERTY, bool); } public static List<String> getPortalsList() { final String portals = getCurrent().get(PORTALS_PROPERTY, DEFAULT_PORTALS); return Arrays.asList(portals.split(", ")); } public static void addNewPortal(final String portal) { final String portals = getCurrent().get(PORTALS_PROPERTY, DEFAULT_PORTALS); if (!StringUtils.contains(portals, portal)) setPortals(portals + ", " + portal); } public static void save() { try { getCurrent().flush(); } catch (BackingStoreException e) { l.error("Failed to save preferences", e); } } private static Preferences getCurrent() { return _INSTANCE.current; } }