UA-.NETStandard/SampleApplications/SDK/Configuration/Schema/InstalledApplicationHelper.cs

/* ========================================================================
 * Copyright (c) 2005-2016 The OPC Foundation, Inc. All rights reserved.
 *
 * OPC Foundation MIT License 1.00
 * 
 * Permission is hereby granted, free of charge, to any person
 * obtaining a copy of this software and associated documentation
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 * copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following
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 * 
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
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using System.Runtime.Serialization;
using System.IO;
using Windows.Storage;

namespace Opc.Ua.Configuration
{
    /// <summary>
    /// Specifies how to configure an application during installation.
    /// </summary>
    public partial class InstalledApplication
    {
        #region Public Methods
        /// <summary>
        /// Loads the application configuration from a configuration section.
        /// </summary>
        public static InstalledApplicationCollection Load(string filePath)
        {
            FileInfo file = new FileInfo(filePath);

            // look in current directory.
            if (!file.Exists)
            {
                file = new FileInfo(Utils.Format("{0}\\{1}", ApplicationData.Current.LocalFolder.Path, filePath));
            }

            // look in executable directory.
            if (!file.Exists)
            {
                file = new FileInfo(Utils.GetAbsoluteFilePath(filePath));
            }

            // file not found.
            if (!file.Exists)
            {
                throw ServiceResultException.Create(
                    StatusCodes.BadConfigurationError,
                    "File does not exist: {0}\r\nCurrent directory is: {1}",
                    filePath,
                    ApplicationData.Current.LocalFolder.Path);
            }

            return Load(file);
        }

        /// <summary>
        /// Loads a collection of security applications.
        /// </summary>
        public static InstalledApplicationCollection Load(FileInfo file)
        {
            FileStream reader = file.Open(FileMode.Open, FileAccess.Read);

            try
            {
                DataContractSerializer serializer = new DataContractSerializer(typeof(InstalledApplicationCollection));
                return serializer.ReadObject(reader) as InstalledApplicationCollection;
            }
            finally
            {
                reader.Dispose();
            }
        }
        #endregion
    }
}