/// <summary>
/// Restores (un-deletes) this feature.
/// </summary>
/// <returns>True if feature restored. False if the feature wasn't marked as inactive.</returns>
internal virtual bool Restore()
{
// Return if this feature doesn't currently have the "inactive" state
if (!IsInactive)
{
return(false);
}
// If this feature referred to an ID, restore it.
if (m_Id != null)
{
// Ensure that the ID is cross-referenced to this feature.
m_Id.AddReference(this);
// That's pretty well it. When a feature is de-activated, only the back
// pointer from the ID is nulled out. The feature retained it's pointer to the ID,
// and the ID itself was left in place as part of the IdPacket to which it belongs.
// For native IDs, the packet needs to be told to decrement the number of free
// IDs.
// TODO: This may be irrelevant (need to also review the logic when something is
// de-activated).
if (m_Id is NativeId)
{
IdManager idMan = MapModel.IdManager;
if (idMan != null)
{
// Find the ID group that applies to the feature's
// entity type (this will be null if the entity type was
// not originally listed in the IdEntity table, or the
// group is considered to be obsolete).
IdGroup g = idMan.GetGroup(this.EntityType);
// If we got a group (and the ID if not foreign) try to find
// the ID packet that refers to the feature's ID.
if (g != null)
{
NativeId nid = (m_Id as NativeId);
IdPacket p = g.FindPacket(nid);
p.RestoreId(m_Id);
}
}
}
}
// Add back into the map index.
MapModel.EditingIndex.AddFeature(this);
// Remember that the feature is now active
IsInactive = false;
return(true);
}
