org.cryptomator.ui.settings.Settings.java Source code

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Here is the source code for org.cryptomator.ui.settings.Settings.java

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/*******************************************************************************
 * Copyright (c) 2014 Sebastian Stenzel
 * This file is licensed under the terms of the MIT license.
 * See the LICENSE.txt file for more info.
 * 
 * Contributors:
 *     Sebastian Stenzel - initial API and implementation
 ******************************************************************************/
package org.cryptomator.ui.settings;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.Serializable;
import java.nio.file.FileSystem;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.StandardOpenOption;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.lang3.SystemUtils;
import org.cryptomator.ui.model.Directory;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.fasterxml.jackson.annotation.JsonPropertyOrder;
import com.fasterxml.jackson.databind.ObjectMapper;

@JsonPropertyOrder(value = { "directories" })
public class Settings implements Serializable {

    private static final long serialVersionUID = 7609959894417878744L;
    private static final Logger LOG = LoggerFactory.getLogger(Settings.class);
    private static final Path SETTINGS_DIR;
    private static final String SETTINGS_FILE = "settings.json";
    private static final ObjectMapper JSON_OM = new ObjectMapper();
    private static Settings INSTANCE = null;

    static {
        final String appdata = System.getenv("APPDATA");
        final FileSystem fs = FileSystems.getDefault();

        if (SystemUtils.IS_OS_WINDOWS && appdata != null) {
            SETTINGS_DIR = fs.getPath(appdata, "Cryptomator");
        } else if (SystemUtils.IS_OS_WINDOWS && appdata == null) {
            SETTINGS_DIR = fs.getPath(SystemUtils.USER_HOME, ".Cryptomator");
        } else if (SystemUtils.IS_OS_MAC_OSX) {
            SETTINGS_DIR = fs.getPath(SystemUtils.USER_HOME, "Library/Application Support/Cryptomator");
        } else {
            // (os.contains("solaris") || os.contains("sunos") || os.contains("linux") || os.contains("unix"))
            SETTINGS_DIR = fs.getPath(SystemUtils.USER_HOME, ".Cryptomator");
        }
    }

    private List<Directory> directories;

    private Settings() {
        // private constructor
    }

    public static synchronized Settings load() {
        if (INSTANCE == null) {
            try {
                Files.createDirectories(SETTINGS_DIR);
                final Path settingsFile = SETTINGS_DIR.resolve(SETTINGS_FILE);
                final InputStream in = Files.newInputStream(settingsFile, StandardOpenOption.READ);
                INSTANCE = JSON_OM.readValue(in, Settings.class);
                return INSTANCE;
            } catch (IOException e) {
                LOG.warn("Failed to load settings, creating new one.");
                INSTANCE = Settings.defaultSettings();
            }
        }
        return INSTANCE;
    }

    public static synchronized void save() {
        if (INSTANCE != null) {
            try {
                Files.createDirectories(SETTINGS_DIR);
                final Path settingsFile = SETTINGS_DIR.resolve(SETTINGS_FILE);
                final OutputStream out = Files.newOutputStream(settingsFile, StandardOpenOption.WRITE,
                        StandardOpenOption.TRUNCATE_EXISTING, StandardOpenOption.CREATE);
                JSON_OM.writeValue(out, INSTANCE);
            } catch (IOException e) {
                LOG.error("Failed to save settings.", e);
            }
        }
    }

    private static Settings defaultSettings() {
        return new Settings();
    }

    /* Getter/Setter */

    public List<Directory> getDirectories() {
        if (directories == null) {
            directories = new ArrayList<>();
        }
        return directories;
    }

    public void setDirectories(List<Directory> directories) {
        this.directories = directories;
    }

}