public Result <SystemRelation, OperationError> AddUsageRelationTo(
ItSystemUsage toSystemUsage,
Maybe <ItInterface> relationInterface,
string description,
string reference,
Maybe <RelationFrequencyType> targetFrequency,
Maybe <ItContract.ItContract> targetContract)
{
if (toSystemUsage == null)
{
throw new ArgumentNullException(nameof(toSystemUsage));
}
var newRelation = new SystemRelation(this);
var updateRelationResult = UpdateRelation(newRelation, toSystemUsage, description, reference, relationInterface, targetContract, targetFrequency);
if (updateRelationResult.Failed)
{
return(updateRelationResult.Error);
}
UsageRelations.Add(newRelation);
return(newRelation);
}
public Result <SystemRelation, OperationFailure> RemoveUsageRelation(int relationId)
{
var relationResult = GetUsageRelation(relationId);
if (!relationResult.HasValue)
{
return(OperationFailure.NotFound);
}
var relation = relationResult.Value;
UsageRelations.Remove(relation);
return(relation);
}
public Maybe <SystemRelation> GetUsageRelation(int relationId)
{
return(UsageRelations.FirstOrDefault(r => r.Id == relationId));
}
