UA-.NETStandard/Libraries/Opc.Ua.Client/NodeCache/INodeCache.cs

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 * Copyright (c) 2005-2020 The OPC Foundation, Inc. All rights reserved.
 *
 * OPC Foundation MIT License 1.00
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using System.Collections.Generic;
using System.Threading;
using System.Threading.Tasks;

namespace Opc.Ua.Client
{
    /// <summary>
    /// A client side cache of the server's type model.
    /// </summary>
    public interface INodeCache : INodeTable, ITypeTable
    {
        /// <summary>
        /// Loads the UA defined types into the cache.
        /// </summary>
        /// <param name="context">The context.</param>
        void LoadUaDefinedTypes(ISystemContext context);

        /// <summary>
        /// Removes all nodes from the cache.
        /// </summary>
        void Clear();

        /// <summary>
        /// Fetches a node from the server and updates the cache.
        /// </summary>
        Node FetchNode(ExpandedNodeId nodeId);

        /// <summary>
        /// Finds a set of nodes in the nodeset,
        /// fetches missing nodes from server.
        /// </summary>
        /// <param name="nodeIds">The node identifier collection.</param>
        IList<INode> Find(IList<ExpandedNodeId> nodeIds);

        /// <summary>
        /// Fetches a node collection from the server and updates the cache.
        /// </summary>
        IList<Node> FetchNodes(IList<ExpandedNodeId> nodeIds);

#if (CLIENT_ASYNC)
        /// <summary>
        /// Finds a set of nodes in the nodeset,
        /// fetches missing nodes from server.
        /// </summary>
        /// <param name="nodeId">The node identifier.</param>
        /// <param name="ct"></param>
        Task<INode> FindAsync(ExpandedNodeId nodeId, CancellationToken ct = default);

        /// <summary>
        /// Finds a set of nodes in the nodeset,
        /// fetches missing nodes from server.
        /// </summary>
        /// <param name="nodeIds">The node identifier collection.</param>
        /// <param name="ct"></param>
        Task<IList<INode>> FindAsync(IList<ExpandedNodeId> nodeIds, CancellationToken ct = default);

        /// <summary>
        /// Fetches a node from the server and updates the cache.
        /// </summary>
        /// <param name="nodeId">Node id to fetch.</param>
        /// <param name="ct"></param>
        Task<Node> FetchNodeAsync(ExpandedNodeId nodeId, CancellationToken ct = default);

        /// <summary>
        /// Fetches a node collection from the server and updates the cache.
        /// </summary>
        /// <param name="nodeIds">The node identifier collection.</param>
        /// <param name="ct"></param>
        Task<IList<Node>> FetchNodesAsync(IList<ExpandedNodeId> nodeIds, CancellationToken ct = default);

        /// <summary>
        /// Adds the supertypes of the node to the cache.
        /// </summary>
        /// <param name="nodeId">Node id to fetch.</param>
        /// <param name="ct"></param>
        Task FetchSuperTypesAsync(ExpandedNodeId nodeId, CancellationToken ct = default);
#endif
        /// <summary>
        /// Adds the supertypes of the node to the cache.
        /// </summary>
        void FetchSuperTypes(ExpandedNodeId nodeId);

        /// <summary>
        /// Returns the references of the specified node that meet the criteria specified.
        /// </summary>
        IList<INode> FindReferences(ExpandedNodeId nodeId, NodeId referenceTypeId, bool isInverse, bool includeSubtypes);

        /// <summary>
        /// Returns the references of the specified nodes that meet the criteria specified.
        /// </summary>
        IList<INode> FindReferences(IList<ExpandedNodeId> nodeIds, IList<NodeId> referenceTypeIds, bool isInverse, bool includeSubtypes);

#if (CLIENT_ASYNC)
        /// <summary>
        /// Returns the references of the specified node that meet the criteria specified.
        /// </summary>
        Task<IList<INode>> FindReferencesAsync(ExpandedNodeId nodeId, NodeId referenceTypeId, bool isInverse, bool includeSubtypes, CancellationToken ct = default);

        /// <summary>
        /// Returns the references of the specified nodes that meet the criteria specified.
        /// </summary>
        Task<IList<INode>> FindReferencesAsync(IList<ExpandedNodeId> nodeIds, IList<NodeId> referenceTypeIds, bool isInverse, bool includeSubtypes, CancellationToken ct = default);
#endif

        /// <summary>
        /// Returns a display name for a node.
        /// </summary>
        string GetDisplayText(INode node);

        /// <summary>
        /// Returns a display name for a node.
        /// </summary>
        string GetDisplayText(ExpandedNodeId nodeId);

        /// <summary>
        /// Returns a display name for the target of a reference.
        /// </summary>
        string GetDisplayText(ReferenceDescription reference);

        /// <summary>
        /// Builds the relative path from a type to a node.
        /// </summary>
        NodeId BuildBrowsePath(ILocalNode node, IList<QualifiedName> browsePath);
    }
}