mirror of
https://github.com/OPCFoundation/UA-.NETStandard.git
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311 lines
11 KiB
C#
311 lines
11 KiB
C#
/* ========================================================================
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* Copyright (c) 2005-2019 The OPC Foundation, Inc. All rights reserved.
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*
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* OPC Foundation MIT License 1.00
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* The complete license agreement can be found here:
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* http://opcfoundation.org/License/MIT/1.00/
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* ======================================================================*/
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using System;
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using System.Collections.Generic;
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using System.Text;
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using System.Diagnostics;
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using System.Xml;
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using System.IO;
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using System.Threading;
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using System.Reflection;
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using Opc.Ua;
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using Opc.Ua.Server;
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namespace Quickstarts.ViewsServer
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{
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/// <summary>
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/// A node manager for a server that exposes several variables.
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/// </summary>
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public class ViewsNodeManager : CustomNodeManager2
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{
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#region Constructors
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/// <summary>
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/// Initializes the node manager.
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/// </summary>
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public ViewsNodeManager(IServerInternal server, ApplicationConfiguration configuration)
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:
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base(server, configuration, Quickstarts.Views.Namespaces.Views, Quickstarts.Views.Namespaces.Engineering, Quickstarts.Views.Namespaces.Operations)
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{
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SystemContext.NodeIdFactory = this;
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// get the configuration for the node manager.
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m_configuration = configuration.ParseExtension<ViewsServerConfiguration>();
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// use suitable defaults if no configuration exists.
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if (m_configuration == null)
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{
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m_configuration = new ViewsServerConfiguration();
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}
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}
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#endregion
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#region IDisposable Members
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/// <summary>
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/// An overrideable version of the Dispose.
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/// </summary>
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protected override void Dispose(bool disposing)
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{
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if (disposing)
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{
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// TBD
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}
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}
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#endregion
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#region INodeIdFactory Members
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/// <summary>
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/// Creates the NodeId for the specified node.
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/// </summary>
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public override NodeId New(ISystemContext context, NodeState node)
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{
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BaseInstanceState instance = node as BaseInstanceState;
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if (instance != null && instance.Parent != null)
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{
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ParsedNodeId pnd = ParsedNodeId.Parse(instance.Parent.NodeId);
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if (pnd != null)
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{
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return pnd.Construct(instance.SymbolicName);
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}
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}
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return node.NodeId;
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}
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#endregion
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#region Overridden Methods
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/// <summary>
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/// Loads a node set from a file or resource and addes them to the set of predefined nodes.
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/// </summary>
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protected override NodeStateCollection LoadPredefinedNodes(ISystemContext context)
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{
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NodeStateCollection predefinedNodes = new NodeStateCollection();
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predefinedNodes.LoadFromBinaryResource(context,
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"Quickstarts.ViewsServer.Model.Quickstarts.Views.PredefinedNodes.uanodes",
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typeof(ViewsNodeManager).GetTypeInfo().Assembly,
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true);
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return predefinedNodes;
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}
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#endregion
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#region INodeManager Members
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/// <summary>
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/// Does any initialization required before the address space can be used.
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/// </summary>
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/// <remarks>
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/// The externalReferences is an out parameter that allows the node manager to link to nodes
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/// in other node managers. For example, the 'Objects' node is managed by the CoreNodeManager and
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/// should have a reference to the root folder node(s) exposed by this node manager.
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/// </remarks>
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public override void CreateAddressSpace(IDictionary<NodeId, IList<IReference>> externalReferences)
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{
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lock (Lock)
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{
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base.CreateAddressSpace(externalReferences);
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NodeState root = FindPredefinedNode(new NodeId(Quickstarts.Views.Objects.Plant, NamespaceIndex), typeof(NodeState));
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Quickstarts.Views.BoilerState boiler1 = new Quickstarts.Views.BoilerState(null);
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ParsedNodeId pnd1 = new ParsedNodeId() { NamespaceIndex = NamespaceIndex, RootId = "Boiler #1" };
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boiler1.Create(
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SystemContext,
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pnd1.Construct(),
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new QualifiedName("Boiler #1", NamespaceIndex),
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null,
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true);
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boiler1.AddReference(Opc.Ua.ReferenceTypeIds.Organizes, true, root.NodeId);
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root.AddReference(Opc.Ua.ReferenceTypeIds.Organizes, false, boiler1.NodeId);
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AddPredefinedNode(SystemContext, boiler1);
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Quickstarts.Views.BoilerState boiler2 = new Quickstarts.Views.BoilerState(null);
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ParsedNodeId pnd2 = new ParsedNodeId() { NamespaceIndex = NamespaceIndex, RootId = "Boiler #2" };
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boiler2.Create(
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SystemContext,
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pnd2.Construct(),
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new QualifiedName("Boiler #2", NamespaceIndex),
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null,
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true);
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boiler2.AddReference(Opc.Ua.ReferenceTypeIds.Organizes, true, root.NodeId);
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root.AddReference(Opc.Ua.ReferenceTypeIds.Organizes, false, boiler2.NodeId);
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AddPredefinedNode(SystemContext, boiler2);
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}
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}
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/// <summary>
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/// Checks if the node is in the view.
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/// </summary>
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protected override bool IsNodeInView(ServerSystemContext context, ContinuationPoint continuationPoint, NodeState node)
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{
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if (continuationPoint.View != null)
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{
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if (continuationPoint.View.ViewId == new NodeId(Quickstarts.Views.Views.Engineering, NamespaceIndex))
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{
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// suppress operations properties.
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if (node != null && node.BrowseName.NamespaceIndex == NamespaceIndexes[2])
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{
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return false;
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}
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}
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if (continuationPoint.View.ViewId == new NodeId(Quickstarts.Views.Views.Operations, NamespaceIndex))
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{
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// suppress engineering properties.
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if (node != null && node.BrowseName.NamespaceIndex == NamespaceIndexes[1])
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{
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return false;
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}
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}
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}
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return true;
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}
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/// <summary>
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/// Checks if the reference is in the view.
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/// </summary>
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protected override bool IsReferenceInView(ServerSystemContext context, ContinuationPoint continuationPoint, IReference reference)
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{
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if (continuationPoint.View != null)
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{
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// guard against absolute node ids.
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if (reference.TargetId.IsAbsolute)
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{
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return true;
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}
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// find the node.
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NodeState node = FindPredefinedNode((NodeId)reference.TargetId, typeof(NodeState));
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if (node != null)
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{
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return IsNodeInView(context, continuationPoint, node);
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}
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}
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return true;
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}
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/// <summary>
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/// Frees any resources allocated for the address space.
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/// </summary>
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public override void DeleteAddressSpace()
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{
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}
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/// <summary>
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/// Returns a unique handle for the node.
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/// </summary>
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protected override Opc.Ua.Server.NodeHandle GetManagerHandle(ServerSystemContext context, NodeId nodeId, IDictionary<NodeId, NodeState> cache)
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{
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lock (Lock)
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{
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// quickly exclude nodes that are not in the namespace.
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if (!IsNodeIdInNamespace(nodeId))
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{
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return null;
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}
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NodeState node = null;
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// check cache (the cache is used because the same node id can appear many times in a single request).
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if (cache != null)
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{
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if (cache.TryGetValue(nodeId, out node))
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{
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return new Opc.Ua.Server.NodeHandle(nodeId, node);
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}
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}
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// look up predefined node.
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if (PredefinedNodes.TryGetValue(nodeId, out node))
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{
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Opc.Ua.Server.NodeHandle handle = new Opc.Ua.Server.NodeHandle(nodeId, node);
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if (cache != null)
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{
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cache.Add(nodeId, node);
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}
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return handle;
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}
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return null;
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}
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}
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/// <summary>
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/// Verifies that the specified node exists.
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/// </summary>
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protected override NodeState ValidateNode(
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ServerSystemContext context,
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Opc.Ua.Server.NodeHandle handle,
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IDictionary<NodeId, NodeState> cache)
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{
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// not valid if no root.
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if (handle == null)
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{
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return null;
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}
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// check if previously validated.
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if (handle.Validated)
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{
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return handle.Node;
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}
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// lookup in operation cache.
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NodeState target = FindNodeInCache(context, handle, cache);
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if (target == null)
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{
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// TBD
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return null;
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}
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return ValidationComplete(context, handle, target, cache);
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}
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#endregion
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#region Overridden Methods
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#endregion
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#region Private Fields
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private ViewsServerConfiguration m_configuration;
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#endregion
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}
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}
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