ApplyRange() private method

private ApplyRange ( object &value ) : Opc.Ua.StatusCode
value object
return Opc.Ua.StatusCode
Example #1
0
        /// <summary>
        /// Returns the value of the attribute for the specified child.
        /// </summary>
        /// <param name="context">The context to use when evaluating the operand.</param>
        /// <param name="typeDefinitionId">The type of the instance.</param>
        /// <param name="relativePath">The path from the instance to the node which defines the attribute.</param>
        /// <param name="attributeId">The attribute to return.</param>
        /// <param name="indexRange">The sub-set of an array value to return.</param>
        /// <returns>
        /// The attribute value. Returns null if the attribute does not exist.
        /// </returns>
        public object GetAttributeValue(
            FilterContext context,
            NodeId typeDefinitionId,
            IList <QualifiedName> relativePath,
            uint attributeId,
            NumericRange indexRange)
        {
            if (!NodeId.IsNull(typeDefinitionId))
            {
                if (!context.TypeTree.IsTypeOf(m_typeDefinitionId, typeDefinitionId))
                {
                    return(null);
                }
            }

            object value = GetAttributeValue(
                m_snapshot,
                relativePath,
                0,
                attributeId);

            if (indexRange != NumericRange.Empty)
            {
                StatusCode error = indexRange.ApplyRange(ref value);

                if (StatusCode.IsBad(error))
                {
                    value = null;
                }
            }

            return(value);
        }
        /// <summary cref="IFilterTarget.GetAttributeValue" />
        public virtual object GetAttributeValue(
            FilterContext context,
            NodeId typeDefinitionId,
            IList <QualifiedName> relativePath,
            uint attributeId,
            NumericRange indexRange)
        {
            // check the type definition.
            if (!NodeId.IsNull(typeDefinitionId) && typeDefinitionId != ObjectTypes.BaseEventType)
            {
                if (!context.TypeTree.IsTypeOf(TypeDefinitionId, typeDefinitionId))
                {
                    return(null);
                }
            }

            // read the child attribute.
            DataValue dataValue = new DataValue();

            ServiceResult result = ReadChildAttribute(
                null,
                relativePath,
                0,
                attributeId,
                dataValue);

            if (ServiceResult.IsBad(result))
            {
                return(null);
            }

            // apply any index range.
            object value = dataValue.Value;

            if (value != null)
            {
                result = indexRange.ApplyRange(ref value);

                if (ServiceResult.IsBad(result))
                {
                    return(null);
                }
            }

            // return the result.
            return(value);
        }
        /// <summary cref="IFilterTarget.GetAttributeValue" />
        public virtual object GetAttributeValue(
            FilterContext context, 
            NodeId typeDefinitionId, 
            IList<QualifiedName> relativePath, 
            uint attributeId, 
            NumericRange indexRange)
        {
            // check the type definition.
            if (!NodeId.IsNull(typeDefinitionId) && typeDefinitionId != ObjectTypes.BaseEventType)
            {
                if (!context.TypeTree.IsTypeOf(TypeDefinitionId, typeDefinitionId))
                {
                    return null;
                }
            }

            // read the child attribute.
            DataValue dataValue = new DataValue();   

            ServiceResult result = ReadChildAttribute(
                null,
                relativePath,
                0,
                attributeId,
                dataValue);
            
            if (ServiceResult.IsBad(result))
            {
                return null;
            }

            // apply any index range.
            object value = dataValue.Value;

            if (value != null)
            {
                result = indexRange.ApplyRange(ref value);
                
                if (ServiceResult.IsBad(result))
                {
                    return null;
                }
            }

            // return the result.
            return value;
        }
Example #4
0
        /// <summary>
        /// Adds a DataValue to a list of values to return.
        /// </summary>
        private void AddValue(
            TimestampsToReturn timestampsToReturn, 
            NumericRange indexRange,
            QualifiedName dataEncoding,
            DataValueCollection values, 
            DataValue value)
        {
            // ignore invalid case.
            if (value == null)
            {
                return;
            }

            // save the last timestamp returned.
            m_lastTime = value.ServerTimestamp;
            
            // check if the index range or data encoding can be applied.
            if (StatusCode.IsGood(value.StatusCode))
            {
                object valueToReturn = value.Value;
                
                // apply the index range.
                if (indexRange != NumericRange.Empty)
                {
                    StatusCode error = indexRange.ApplyRange(ref valueToReturn);

                    if (StatusCode.IsBad(error))
                    {
                        value.Value = null;
                        value.StatusCode = error;
                    }
                    else
                    {
                        value.Value = valueToReturn;
                    }
                }

                // apply the data encoding.
                if (!QualifiedName.IsNull(dataEncoding))
                {
                    value.Value = null;
                    value.StatusCode = StatusCodes.BadDataEncodingUnsupported;
                }
            }

            // apply the timestamps filter.
            if (timestampsToReturn == TimestampsToReturn.Neither || timestampsToReturn == TimestampsToReturn.Server)
            {
                value.SourceTimestamp = DateTime.MinValue;
            }

            if (timestampsToReturn == TimestampsToReturn.Neither || timestampsToReturn == TimestampsToReturn.Source)
            {
                value.ServerTimestamp = DateTime.MinValue;
            }

            // add result.
            values.Add(value);
        }
        /// <summary>
        /// Returns the value of the attribute for the specified child.
        /// </summary>
        /// <param name="context">The context to use when evaluating the operand.</param>
        /// <param name="typeDefinitionId">The type of the instance.</param>
        /// <param name="relativePath">The path from the instance to the node which defines the attribute.</param>
        /// <param name="attributeId">The attribute to return.</param>
        /// <param name="indexRange">The sub-set of an array value to return.</param>
        /// <returns>
        /// The attribute value. Returns null if the attribute does not exist.
        /// </returns>
        public object GetAttributeValue(
            FilterContext context, 
            NodeId typeDefinitionId, 
            IList<QualifiedName> relativePath, 
            uint attributeId, 
            NumericRange indexRange)
        {
            if (!NodeId.IsNull(typeDefinitionId))
            {
                if (!context.TypeTree.IsTypeOf(m_typeDefinitionId, typeDefinitionId))
                {
                    return null;
                }
            }

            object value = GetAttributeValue(
                m_snapshot,
                relativePath,
                0,
                attributeId);

            if (indexRange != NumericRange.Empty)
            {
                StatusCode error = indexRange.ApplyRange(ref value);

                if (StatusCode.IsBad(error))
                {
                    value = null;
                }
            }

            return value;
        }