source: java/ProgramSettings/src/net/oni2/SettingsManager.java@ 1009

package net.oni2;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.Serializable;
import java.util.HashMap;

import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.io.xml.StaxDriver;

/**
 * Manages and stores programm settings
 * 
 * @author Christian Illy
 */
public class SettingsManager implements Serializable {

        private static final long serialVersionUID = 8067725289301601179L;

        private static SettingsManager instance = new SettingsManager();

        private HashMap<String, Object> prefs = new HashMap<String, Object>();

        private boolean printNamesNotInMap = false;

        @SuppressWarnings("unused")
        private transient boolean offlineMode = false;
        @SuppressWarnings("unused")
        private transient boolean noCacheUpdate = false;

        /**
         * Get the singleton instance
         * 
         * @return Singleton instance
         */
        public static SettingsManager getInstance() {
                return instance;
        }

        private static XStream getXStream() {
                XStream xs = new XStream(new StaxDriver());
                xs.alias("Settings", SettingsManager.class);
                return xs;
        }

        /**
         * Serializes the settings to disk
         * 
         * @param settingsFile
         *            File to write to
         */
        public void serializeToFile(File settingsFile) {
                try {
                        FileOutputStream fos = new FileOutputStream(settingsFile);
                        XStream xs = getXStream();
                        xs.toXML(this, fos);
                        fos.close();
                } catch (FileNotFoundException e) {
                        e.printStackTrace();
                } catch (IOException e) {
                        e.printStackTrace();
                }
        }

        /**
         * Deserializes the settings from disk
         * 
         * @param settingsFile
         *            File to read from
         */
        public static void deserializeFromFile(File settingsFile) {
                try {
                        FileInputStream fis = new FileInputStream(settingsFile);
                        XStream xs = getXStream();
                        Object obj = xs.fromXML(fis);
                        if (obj instanceof SettingsManager)
                                instance = (SettingsManager) obj;
                        fis.close();
                } catch (FileNotFoundException e) {
                } catch (IOException e) {
                }
        }

        /**
         * Put a string value
         * 
         * @param key
         *            Key for value
         * @param value
         *            Value
         */
        public void put(String key, String value) {
                prefs.put(key, value);
        }

        /**
         * Put a boolean value
         * 
         * @param key
         *            Key for value
         * @param value
         *            Value
         */
        public void put(String key, boolean value) {
                prefs.put(key, value);
        }

        /**
         * Put a int value
         * 
         * @param key
         *            Key for value
         * @param value
         *            Value
         */
        public void put(String key, int value) {
                prefs.put(key, value);
        }

        /**
         * Get a string value
         * 
         * @param key
         *            Key for value
         * @param def
         *            Default return value if key does not exist
         * @return Value
         */
        public String get(String key, String def) {
                if (prefs.containsKey(key)) {
                        if (prefs.get(key) instanceof String)
                                return (String) (prefs.get(key));
                }
                if (printNamesNotInMap)
                        System.out.println("Settings: Key \"" + key
                                        + "\" not in Map, defaulting to \"" + def + "\".");
                return def;
        }

        /**
         * Get a boolean value
         * 
         * @param key
         *            Key for value
         * @param def
         *            Default return value if key does not exist
         * @return Value
         */
        public Boolean get(String key, Boolean def) {
                if (prefs.containsKey(key)) {
                        if (prefs.get(key) instanceof Boolean)
                                return (Boolean) (prefs.get(key));
                }
                if (printNamesNotInMap)
                        System.out.println("Settings: Key \"" + key
                                        + "\" not in Map, defaulting to \"" + def + "\".");
                return def;
        }

        /**
         * Get a int value
         * 
         * @param key
         *            Key for value
         * @param def
         *            Default return value if key does not exist
         * @return Value
         */
        public int get(String key, int def) {
                if (prefs.containsKey(key)) {
                        if (prefs.get(key) instanceof Integer)
                                return (Integer) (prefs.get(key));
                }
                if (printNamesNotInMap)
                        System.out.println("Settings: Key \"" + key
                                        + "\" not in Map, defaulting to \"" + def + "\".");
                return def;
        }

        /**
         * Remove a value
         * 
         * @param key
         *            Key to value to remove
         */
        public void removeValue(String key) {
                prefs.remove(key);
        }

}