/// <summary>
/// Replaces mandatory relation "to" and resets relation interface
/// </summary>
/// <param name="toSystemUsage">Replacement system usage</param>
public Result <SystemRelation, OperationError> SetRelationTo(ItSystemUsage toSystemUsage)
{
if (toSystemUsage == null)
{
throw new ArgumentNullException(nameof(toSystemUsage));
}
if (FromSystemUsage.Id == toSystemUsage.Id)
{
return(new OperationError("'From' cannot equal 'To'", OperationFailure.BadInput));
}
//Both ends of the relation must be in same organization
if (!CheckSameOrganizationConstraint <ItSystemUsage>(toSystemUsage).GetValueOrFallback(false))
{
return(new OperationError("Attempt to create relation to it-system in a different organization", OperationFailure.BadInput));
}
ToSystemUsage.Track();
ToSystemUsage = toSystemUsage;
RelationInterface.Track();
RelationInterface =
RelationInterface
.FromNullable()
.Select(relationInterface => ToSystemUsage.GetExposedInterface(relationInterface.Id).HasValue)
.GetValueOrFallback(false)
? RelationInterface
: null;
return(this);
}
/// <summary>
/// Replace relation interface
/// </summary>
/// <param name="relationInterface">Replacement interface to be used on the relation. None is allowed</param>
public Result <SystemRelation, OperationError> SetRelationInterface(Maybe <ItInterface> relationInterface)
{
if (ToSystemUsage == null)
{
throw new InvalidOperationException("Cannot set interface to unknown 'To' system");
}
if (relationInterface.HasValue)
{
if (!ToSystemUsage.HasExposedInterface(relationInterface.Value.Id))
{
return(new OperationError("Cannot set interface which is not exposed by the 'to' system", OperationFailure.BadInput));
}
}
RelationInterface.Track();
RelationInterface = relationInterface.GetValueOrDefault();
return(this);
}