Opc.Ua.WriteValue.Validate C# (CSharp) Method

Validate() public static method

Validates a write value parameter.
public static Validate ( WriteValue value ) : ServiceResult
value WriteValue
return ServiceResult
        public static ServiceResult Validate(WriteValue value)
        {
            // check for null structure.
            if (value == null)
            {
                return StatusCodes.BadStructureMissing;
            }

            // null node ids are always invalid.
            if (value.NodeId == null)
            {
                return StatusCodes.BadNodeIdInvalid;
            }
            
            // must be a legimate attribute value.
            if (!Attributes.IsValid(value.AttributeId))
            {
                return StatusCodes.BadAttributeIdInvalid;
            }

            // initialize as empty.
            value.ParsedIndexRange = NumericRange.Empty;

            // parse the index range if specified.
            if (!String.IsNullOrEmpty(value.IndexRange))
            {
                try
                {
                    value.ParsedIndexRange = NumericRange.Parse(value.IndexRange);
                }
                catch (Exception e)
                {
                    return ServiceResult.Create(e, StatusCodes.BadIndexRangeInvalid, String.Empty);
                }
                
                // check that value provided is actually an array.
                Array array = value.Value.Value as Array;

                if (array == null)
                {
                    return StatusCodes.BadTypeMismatch;
                }
                
                NumericRange range = value.ParsedIndexRange;

                // check that the number of elements to write matches the index range.
                if (range.End >= 0 && (range.End - range.Begin != array.Length-1))
                {
                    return StatusCodes.BadIndexRangeNoData;
                }

                // check for single element.
                if (range.End < 0 && array.Length != 1)
                {
                    return StatusCodes.BadIndexRangeInvalid;
                }
            }
            else
            {
                value.ParsedIndexRange = NumericRange.Empty;
            }

            // passed basic validation.
            return null;
        }        
        #endregion
WriteValue