BExIS.Dlm.Services.DataStructure.DataStructureManager.AddParameterUsage C# (CSharp) Метод

        public Parameter AddParameterUsage(Variable variableUsage, DataAttribute dataAttribute, bool isValueOptional, string label, string defaultValue, string missingValue, string description)
        {
            Contract.Requires(variableUsage != null && variableUsage.DataAttribute.Id >= 0);
            Contract.Requires(dataAttribute != null && dataAttribute.Id >= 0);
            Contract.Ensures(Contract.Result<Parameter>() != null && Contract.Result<Parameter>().Id >= 0);

            VariableRepo.Reload(variableUsage);
            VariableRepo.LoadIfNot(variableUsage.Parameters);
            int count = (from pu in variableUsage.Parameters
                         where pu.DataAttribute.Id.Equals(dataAttribute.Id)
                         select pu
                        )
                        .Count();

            // support multiple use of a data attribute as a parameter in a variable context
            //if (count > 0)
            //    throw new Exception(string.Format("Data attribute {0} is already used as a parameter in conjunction with variable {1} in data structure {2}", dataAttribute.Id, variableUsage.DataAttribute.Id, variableUsage.DataStructure.Id));

            Parameter usage = new Parameter()
            {
                DataAttribute = dataAttribute,
                Variable = variableUsage,
                MinCardinality = isValueOptional ? 0 : 1,
                // if there is no label provided, use the data attribute name and a sequence number calculated by the number of occurrences of that data attribute in the current usage
                Label = !string.IsNullOrWhiteSpace(label) ? label : (count <= 0 ? dataAttribute.Name : string.Format("{0} ({1})", dataAttribute.Name, count)),
                DefaultValue = defaultValue,
                MissingValue = missingValue,
                Description = description
            };
            dataAttribute.UsagesAsParameter.Add(usage);
            variableUsage.Parameters.Add(usage);
            using (IUnitOfWork uow = this.GetUnitOfWork())
            {
                IRepository<Parameter> repo = uow.GetRepository<Parameter>();
                repo.Put(usage);
                uow.Commit();
            }
            return (usage);
        }