UA-.NETStandard/SampleApplications/Samples/Common/TestData/TestSystemConditionState.cs

/* Copyright (c) 1996-2016, OPC Foundation. All rights reserved.
   The source code in this file is covered under a dual-license scenario:
     - RCL: for OPC Foundation members in good-standing
     - GPL V2: everybody else
   RCL license terms accompanied with this source code. See http://opcfoundation.org/License/RCL/1.00/
   GNU General Public License as published by the Free Software Foundation;
   version 2 of the License are accompanied with this source code. See http://opcfoundation.org/License/GPLv2
   This source code 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.
*/

using System;
using System.Collections.Generic;
using System.Xml;
using System.IO;
using System.Reflection;
using Opc.Ua;

namespace TestData
{
    public partial class TestSystemConditionState
    {
        #region Initialization
        /// <summary>
        /// Initializes the object as a collection of counters which change value on read.
        /// </summary>
        protected override void OnAfterCreate(ISystemContext context, NodeState node)
        {
            base.OnAfterCreate(context, node);

            this.MonitoredNodeCount.OnSimpleReadValue = OnReadMonitoredNodeCount;
        }
        #endregion

        #region Protected Methods
        /// <summary>
        /// Reads the value for the MonitoredNodeCount.
        /// </summary>
        protected virtual ServiceResult OnReadMonitoredNodeCount(
            ISystemContext context, 
            NodeState node, 
            ref object value)
        {
            TestDataSystem system = context.SystemHandle as TestDataSystem;

            if (system == null)
            {
                return StatusCodes.BadOutOfService;
            }

            value = system.MonitoredNodeCount;
            return ServiceResult.Good;
        }
        #endregion
    }
}