public static ChangeSet EvaluateDiffWith3dmData(IFileDataTable table, IEnumerable table3dm, ref DataStore store)
{
Type tableObjectType = null;
ChangeSet changes = new ChangeSet();
Dictionary <Guid, ModelComponent> table3dmCached = new Dictionary <Guid, ModelComponent>();
HashSet <Guid> objGuidsWithMatches = new HashSet <Guid>();
var i = table3dm.GetEnumerator();
while (i.MoveNext())
{
ModelComponent comp = (ModelComponent)i.Current;
if (tableObjectType == null)
{
tableObjectType = comp.GetType();
}
//caching this for future use
table3dmCached.Add(comp.Id, comp);
//now doing the comparison
if (table.Contains(comp.Id))
{
objGuidsWithMatches.Add(comp.Id);
ModelComponent obj = table.GetModelComponent(comp.Id);
if (!obj.Equals(comp))
{
//object has been modified
Guid initialVersion;
if (!table.ObjectHasAlias(comp.Id, out initialVersion))
{
initialVersion = comp.Id;
}
//adding the new version of the object to the store
Guid finalVersion = store.AddObject(comp, true);
//create modification type change from initial version to final version
changes.AddChange(ChangeType.Modification, tableObjectType, comp.Id, initialVersion, finalVersion);
}
}
else
{
//create addition change
changes.AddChange(ChangeType.Addition, tableObjectType, comp.Id);
}
}
//finding the objects in the original tables whose matches were not found
var deletedGuids = table.Objects.Except(objGuidsWithMatches);
foreach (var deleted in deletedGuids)
{
changes.AddChange(ChangeType.Deletion, tableObjectType, deleted);
}
return(changes);
}
