Opc.Ua.ContentFilter.Evaluate C# (CSharp) Method

ContentFilter Class Documentation ファイルを表示 Open project: OPCFoundation/UA-.NETStandardLibrary

Evaluate() public method

Evaluates the first element in the ContentFilter. If the first or any subsequent element has dependent elements, the dependent elements are evaluated before the root element (recursive descent). Elements which are not linked (directly or indirectly) to the first element will not be evaluated (they have no influence on the result).

public Evaluate ( FilterContext context, IFilterTarget target ) : bool
context	FilterContext	The context to use when evaluating the filter.
target	IFilterTarget	The target to use when evaluating elements that reference the type model.
return	bool

        public bool Evaluate(FilterContext context, IFilterTarget target)
        {
            // check if nothing to do.
            if (this.Elements.Count == 0)
            {
                return true;
            }

            bool? result = Evaluate(context, target, 0) as bool?;

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

            return result.Value;
        }
        #endregion