Java tutorial
/* * Universal Password Manager * Copyright (C) 2005-2013 Adrian Smith * * This file is part of Universal Password Manager. * * Universal Password Manager 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. * * Universal Password Manager 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 Universal Password Manager; if not, write to the Free Software * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */ package com._17od.upm.util; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.util.Properties; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import com._17od.upm.platformspecific.PlatformSpecificCode; /** * This class provides the configuration services to the rest of the application */ public class Preferences { private static Log log = LogFactory.getLog(Preferences.class); public class ApplicationOptions { public static final String DB_TO_LOAD_ON_STARTUP = "DBToLoadOnStartup"; public static final String ACCOUNT_HIDE_PASSWORD = "account.hidePassword"; public static final String ACCOUNT_PASSWORD_LENGTH = "account.passwordLenght"; public static final String DATABASE_AUTO_LOCK = "database.auto_lock"; public static final String DATABASE_AUTO_LOCK_TIME = "database.auto_lock_time"; public static final String HTTP_PROXY_ENABLED = "http.proxy.enabled"; public static final String HTTP_PROXY_HOST = "http.proxy.host"; public static final String HTTP_PROXY_PORT = "http.proxy.port"; public static final String HTTP_PROXY_USERNAME = "http.proxy.username"; public static final String HTTP_PROXY_PASSWORD = "http.proxy.password"; public static final String HTTPS_ACCEPT_SELFSIGNED_CERTS = "https.accept.selfsigned.certs"; public static final String LOCALE = "locale"; } public class DatabaseOptions { } private static final String PREF_FILE = System.getProperty("user.home") + System.getProperty("file.separator") + "upm.properties"; private static final String PREF_FILE_SYS_PROP = "upm.properties"; private static Properties preferences; private static String propertiesFile; public static String get(String name, String defaultValue) { String retVal = preferences.getProperty(name, defaultValue); if (log.isDebugEnabled()) { log.debug("Returning the property, name=" + name + ", value=" + retVal); } return retVal; } public static int getInt(String name, int defaultValue) { String cfgVal = preferences.getProperty(name); int retVal = defaultValue; if (cfgVal != null && Util.isNumeric(cfgVal)) { retVal = Integer.parseInt(cfgVal); } if (log.isDebugEnabled()) { log.debug("Returning the property, name=" + name + ", value=" + retVal); } return retVal; } public static String get(String name) { return get(name, null); } public static void set(String name, String value) { if (log.isDebugEnabled()) { log.debug("Setting the property, name=" + name + ", value=" + value); } preferences.setProperty(name, value); } public static void load() throws FileNotFoundException, IOException { //Check for the system property PREF_FILE_SYS_PROP. If supplied it will give the name //of the properties file to use. If it's not given then use the properties file in the //user's home directory (which may or may not exist) // Mac and Linux have different places to store configuration files - // set PREF_FILE_SYS_PROP appropriately. if (!System.getProperties().containsKey(PREF_FILE_SYS_PROP)) { if (PlatformSpecificCode.isLinux()) { String configBase = System.getenv("XDG_CONFIG_HOME"); if (null == configBase || configBase.trim().equals("")) { configBase = System.getProperty("user.home") + System.getProperty("file.separator") + ".config"; } System.setProperty(PREF_FILE_SYS_PROP, configBase + System.getProperty("file.separator") + "upm.properties"); } else if (PlatformSpecificCode.isMAC()) { System.setProperty(PREF_FILE_SYS_PROP, System.getProperty("user.home") + System.getProperty("file.separator") + "Library" + System.getProperty("file.separator") + "Preferences" + System.getProperty("file.separator") + "upm.properties"); } } propertiesFile = System.getProperty(PREF_FILE_SYS_PROP); if (propertiesFile == null || propertiesFile.trim().equals("")) { propertiesFile = PREF_FILE; } // Create propertiesFile directories if it doesn't exist File prefs = new File(propertiesFile); prefs.getParentFile().mkdirs(); //Attempt to load the properties try { if (log.isInfoEnabled()) { log.info("Loading the properties file [" + propertiesFile + "]"); } preferences = new Properties(); preferences.load(new FileInputStream(propertiesFile)); } catch (FileNotFoundException e) { if (log.isDebugEnabled()) { log.debug("Property file not found. Will be created the next time the properties are saved."); } } } public static void save() throws IOException { if (log.isDebugEnabled()) { log.debug("Saving properties to the file [" + PREF_FILE + "]"); } preferences.store(new FileOutputStream(propertiesFile), "Universal Password Manager Preferences"); } }