/// <summary>
/// Runs in the Context of a lock, and therefor can contain non thread safe calls.
/// </summary>
/// <param name="logicalName">Name of the logical.</param>
private void SingleThreadAdd(string logicalName)
{
var info = new EntityDependencyInfo(logicalName);
Infos.Add(logicalName, info);
if (Types.Count == 0 || Types.First.Value.DependsOn(info))
{
// No values in the list or the first value depends on the new info value
info.Node = Types.AddFirst(info);
/* Check for any Types that this new type is dependent on.
* Consider the Case of A -> B and B -> C
* A is added first, it becomes first. C is added next, and it has no dependency on A or visa versa, so it is added last, then B is added, and it is added first, but C isn't moved
* Need to move C to the front, or list discrepency
*/
var existingDependent = Types.Skip(1).FirstOrDefault(existingInfo => info.DependsOn(existingInfo));
if (existingDependent == null)
{
return;
}
foreach (var type in Types)
{
if (type == existingDependent)
{
// Have walked the entire list and come to the one that needs to be moved without finding anything that it depends on, free to move.
Types.Remove(existingDependent);
existingDependent.Node = Types.AddFirst(existingDependent);
return;
}
if (existingDependent.Dependencies.Contains(type.LogicalName))
{
Conflicts.Add(string.Format("Circular Reference Found! {0} was added, which depends on {1}, but {2} depends on {0} and was found before {1}. If {1} is needed first, add it after {0}", logicalName, existingDependent.LogicalName, type.LogicalName));
return;
}
}
}
var dependent = Types.Skip(1).FirstOrDefault(existingInfo => existingInfo.DependsOn(info));
info.Node = dependent == null?Types.AddLast(info) : Types.AddBefore(dependent.Node, info);
}
/// <summary>
/// Returns true if the Entity Dependency Info depends on given Entity Dependency Info.
/// </summary>
/// <param name="info">The info to check to see if it is a dependency.</param>
/// <returns></returns>
public bool DependsOn(EntityDependencyInfo info)
{
return(Dependencies.Contains(info.LogicalName) || info.Dependents.Contains(LogicalName));
}
