Opc.Ua.TypeTable.IsEncodingOf C# (CSharp) Method

        public bool IsEncodingOf(ExpandedNodeId encodingId, ExpandedNodeId datatypeId)
        {
            // check for invalid ids.
            if (NodeId.IsNull(encodingId) || NodeId.IsNull(datatypeId))
            {
                return false;
            }
            
            NodeId localId = ExpandedNodeId.ToNodeId(encodingId, m_namespaceUris);

            if (localId == null)
            {
                return false;
            }

            NodeId localTypeId = ExpandedNodeId.ToNodeId(datatypeId, m_namespaceUris);
            
            if (localTypeId == null)
            {
                return false;
            }

            lock (m_lock)
            {
                // lookup the immediate basetype of the subtype.
                TypeInfo typeInfo = null;

                if (!m_encodings.TryGetValue(localId, out typeInfo))
                {
                    return false;
                }

                // the encoding is a representation of the expected datatype id.
                if (localTypeId == typeInfo.NodeId)
                {
                    return true;
                }

                // check if the encoding is a representation of a subtype of the expected datatype id.
                TypeInfo superTypeInfo = typeInfo.SuperType;

                while (superTypeInfo != null)
                {
                    if (!superTypeInfo.Deleted && superTypeInfo.NodeId == localTypeId)
                    {
                        return true;
                    }

                    superTypeInfo = superTypeInfo.SuperType;
                }

                // no match.
                return false;
            }
        }