/// <summary>
/// Returns the next child.
/// </summary>
private IReference NextChild()
{
// check if a specific browse name is requested.
if (QualifiedName.IsNull(base.BrowseName))
{
return(NextChild(m_stage));
}
// keep fetching references until a matching browse name if found.
NodeStateReference reference = null;
do
{
reference = NextChild(m_stage);
if (reference != null)
{
// need to let the caller look up the browse name.
if (reference.Target == null)
{
return(reference);
}
// check for browse name match.
if (reference.Target.BrowseName == base.BrowseName)
{
return(reference);
}
}
}while (reference != null);
// no match - need to go onto the next stage.
return(null);
}
/// <summary>
/// Returns the next child.
/// </summary>
private IReference NextChild()
{
ComDaClientManager system = (ComDaClientManager)this.SystemContext.SystemHandle;
ComDaClient client = system.SelectClient((ServerSystemContext)SystemContext);
// check if a specific browse name is requested.
if (QualifiedName.IsNull(base.BrowseName))
{
return(NextChild(m_stage));
}
// keep fetching references until a matching browse name if found.
NodeStateReference reference = null;
do
{
reference = NextChild(m_stage);
if (reference != null)
{
// need to let the caller look up the browse name.
if (reference.Target == null)
{
return(reference);
}
// check for browse name match.
if (reference.Target.BrowseName == base.BrowseName)
{
return(reference);
}
}
}while (reference != null);
// no match - need to go onto the next stage.
return(null);
}
/// <summary>
/// Returns the next reference.
/// </summary>
/// <returns></returns>
public override IReference Next()
{
lock (DataLock)
{
IReference reference = null;
// enumerate pre-defined references.
// always call first to ensure any pushed-back references are returned first.
reference = base.Next();
if (reference != null)
{
return(reference);
}
// check that the root exists.
if (m_area == null || !m_area.Exists)
{
return(null);
}
// don't start browsing huge number of references when only internal references are requested.
if (InternalOnly)
{
return(null);
}
// start with directories.
if (m_stage == Stage.Begin)
{
m_stage = Stage.Directories;
m_directories = m_area.GetDirectories();
m_position = 0;
}
// enumerate directories.
if (m_stage == Stage.Directories)
{
if (IsRequired(ReferenceTypeIds.Organizes, false))
{
reference = NextChild();
if (reference != null)
{
return(reference);
}
}
m_stage = Stage.Files;
m_files = m_area.GetFiles("*.csv");
m_position = 0;
}
// enumerate files.
if (m_stage == Stage.Files)
{
if (IsRequired(ReferenceTypeIds.Organizes, false))
{
reference = NextChild();
if (reference != null)
{
return(reference);
}
}
m_stage = Stage.Parents;
m_position = 0;
}
// enumerate parents.
if (m_stage == Stage.Parents)
{
if (IsRequired(ReferenceTypeIds.Organizes, true))
{
if (m_isRoot)
{
reference = new NodeStateReference(ReferenceTypeIds.Organizes, true, ObjectIds.ObjectsFolder);
}
else
{
// create the parent area.
AreaState parent = new AreaState(SystemContext, m_area.Parent);
// construct the reference.
reference = new NodeStateReference(ReferenceTypeIds.Organizes, true, parent);
}
m_stage = Stage.Done;
m_position = 0;
return(reference);
}
}
// all done.
return(null);
}
}
public void AddToReferences(NodeStateReference nodeRef)
{
m_references.Add(nodeRef);
}