source: branches/eraser6/CodeReview/Eraser.Manager/ManagerLibrary.cs @ 1792

/* 
 * $Id$
 * Copyright 2008-2010 The Eraser Project
 * Original Author: Joel Low <lowjoel@users.sourceforge.net>
 * Modified By:
 * 
 * This file is part of Eraser.
 * 
 * Eraser 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.
 * 
 * Eraser 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.
 * 
 * A copy of the GNU General Public License can be found at
 * <http://www.gnu.org/licenses/>.
 */

using System;
using System.Collections.Generic;
using System.Text;
using System.Runtime.Serialization;

namespace Eraser.Manager
{
    /// <summary>
    /// The library instance which initializes and cleans up data required for the
    /// library to function.
    /// </summary>
    public class ManagerLibrary : IDisposable
    {
        public ManagerLibrary(SettingsManager settings)
        {
            if (Instance != null)
                throw new InvalidOperationException("Only one ManagerLibrary instance can " +
                    "exist at any one time");

            Instance = this;
            SettingsManager = settings;

            EntropySourceManager = new EntropySourceRegistrar();
            PRNGManager = new PrngManager();
            ErasureMethodManager = new ErasureMethodRegistrar();
            FileSystemManager = new FileSystemManager();
            Host = new Plugin.DefaultHost();
            Host.Load();
        }

        ~ManagerLibrary()
        {
            Dispose(false);
        }

        protected virtual void Dispose(bool disposing)
        {
            if (SettingsManager == null)
                return;

            if (disposing)
            {
                EntropySourceManager.Poller.Abort();
                Host.Dispose();
                SettingsManager.Save();
            }

            SettingsManager = null;
            Instance = null;
        }

        public void Dispose()
        {
            Dispose(true);
            GC.SuppressFinalize(this);
        }

        /// <summary>
        /// The global library instance.
        /// </summary>
        public static ManagerLibrary Instance { get; private set; }

        /// <summary>
        /// The global instance of the EntropySource Manager
        /// </summary>
        public EntropySourceRegistrar EntropySourceManager { get; private set; }

        /// <summary>
        /// The global instance of the PRNG Manager.
        /// </summary>
        public PrngManager PRNGManager { get; private set; }

        /// <summary>
        /// The global instance of the Erasure method manager.
        /// </summary>
        public ErasureMethodRegistrar ErasureMethodManager { get; private set; }

        /// <summary>
        /// The global instance of the File System manager.
        /// </summary>
        public FileSystemManager FileSystemManager { get; private set; }

        /// <summary>
        /// Global instance of the Settings manager.
        /// </summary>
        public SettingsManager SettingsManager { get; set; }

        /// <summary>
        /// Gets the settings object representing the settings for the Eraser
        /// Manager. This is just shorthand for the local classes.
        /// </summary>
        public static ManagerSettings Settings
        {
            get
            {
                if (settingsInstance == null)
                    settingsInstance = new ManagerSettings();
                return settingsInstance;
            }
        }

        /// <summary>
        /// The singleton instance for <see cref="Settings"/>.
        /// </summary>
        private static ManagerSettings settingsInstance;

        /// <summary>
        /// The global instance of the Plugin host.
        /// </summary>
        internal Plugin.DefaultHost Host;
    }
}