Example #1
0
        private static bool EvaluatePropertyRestriction(Restriction.PropertyRestriction restriction, IRuleEvaluationContext context)
        {
            RestrictionEvaluator.ValidatePropertyRestriction(restriction);
            PropTag propTag = restriction.PropTag;

            if (restriction.MultiValued)
            {
                propTag = RuleUtil.GetMultiValuePropTag(propTag);
            }
            context.TraceFunction <PropTag, Restriction.RelOp, object>("PropertyRestriction [{0}] {1} [{2}]", propTag, restriction.Op, restriction.PropValue.Value);
            object obj = context[propTag];
            bool   flag;

            if (obj == null)
            {
                flag = false;
            }
            else if (restriction.MultiValued)
            {
                flag = RestrictionEvaluator.CompareMultiValueWithValue(context, RuleUtil.GetSingleValuePropTag(restriction.PropTag), restriction.Op, obj, restriction.PropValue.Value);
            }
            else if (RuleUtil.IsMultiValueTag(restriction.PropValue.PropTag))
            {
                flag = RestrictionEvaluator.CompareValueWithMultiValue(context, restriction.PropTag, restriction.Op, obj, restriction.PropValue.Value);
            }
            else
            {
                flag = context.CompareSingleValue(restriction.PropTag, restriction.Op, obj, restriction.PropValue.Value);
            }
            context.TraceFunction <bool, object>("PropertyRestriction evaluated to {0} with property value [{1}]", flag, obj);
            return(flag);
        }