public bool Remove(string serviceAssemblyQualifiedName)
{
ServiceRequirement req = Find(serviceAssemblyQualifiedName) as ServiceRequirement;
if (req != null)
{
Debug.Assert(req.Holder == this);
if (!CanChange(ChangeStatus.Delete, req.AssemblyQualifiedName, req.Requirement))
{
return(false);
}
if (_first == req)
{
_first = req.NextElement;
}
else
{
this.First(r => r.NextElement == req).NextElement = req.NextElement;
}
req.Holder = null;
--_count;
Change(ChangeStatus.Delete, req.AssemblyQualifiedName, req.Requirement);
}
return(true);
}
public IEnumerator <ServiceRequirement> GetEnumerator()
{
ServiceRequirement e = _first;
while (e != null)
{
yield return(e);
e = e.NextElement;
}
}
public bool Clear()
{
if (!CanChange(ChangeStatus.ContainerClear, string.Empty, RunningRequirement.Optional))
{
return(false);
}
foreach (ServiceRequirement r in this)
{
r.Holder = null;
}
_first = null;
_count = 0;
Change(ChangeStatus.ContainerClear, string.Empty, RunningRequirement.Optional);
return(true);
}
public ServiceRequirement AddOrSet(string serviceAssemblyQualifiedName, RunningRequirement requirement)
{
ServiceRequirement req = this.FirstOrDefault(r => r.AssemblyQualifiedName == serviceAssemblyQualifiedName);
if (req != null)
{
if (req.Requirement != requirement && CanChange(ChangeStatus.Update, serviceAssemblyQualifiedName, requirement))
{
req.Requirement = requirement;
Change(ChangeStatus.Update, serviceAssemblyQualifiedName, requirement);
}
}
else if (CanChange(ChangeStatus.Add, serviceAssemblyQualifiedName, requirement))
{
req = new ServiceRequirement(this, serviceAssemblyQualifiedName, requirement);
req.NextElement = _first;
_first = req;
_count++;
Change(ChangeStatus.Add, serviceAssemblyQualifiedName, requirement);
}
return(req);
}
public bool Contains(object item)
{
ServiceRequirement e = item as ServiceRequirement;
return(e != null ? e.Holder == this : false);
}
