private void AddParentToChildJoins(DbJoin arg)
{
TableKey childTable = arg.Destination;
TableKey parent = null;
Dictionary <int, string> localGeneratedJoins = new Dictionary <int, string> ( );
while ((parent = childTable.Parent) != null && (arg.Source != childTable))
{
DbJoin join = new DbJoin(parent, childTable);
if (!_generatedJoins.ContainsKey(join))
{
var joins = _cachedJoins.GetOrAdd(join, GenerateAndAddJoinWithChild);
localGeneratedJoins.Add(join, joins.First( ));
}
childTable = parent;
}
if (arg.Source == childTable)
{
Merge(_generatedJoins, localGeneratedJoins);
}
}
private void CreateJoin(DbJoin arg)
{
if (!AddChildToParentJoins(arg))
{
AddParentToChildJoins(arg);
}
}
public void AddJoins(TableKey source, TableKey destination)
{
if (source == destination)
{
return;
}
DbJoin join = new DbJoin(source, destination);
CreateJoin(join);
}
private bool AddChildToParentJoins(DbJoin arg)
{
TableKey childTable = arg.Source;
TableKey parent = null;
while ((parent = childTable.Parent) != null && (arg.Destination != childTable))
{
DbJoin join = new DbJoin(childTable, parent);
if (!_generatedJoins.ContainsKey(join))
{
var joins = _cachedJoins.GetOrAdd(join, GenerateAndAddNewJoin);
_generatedJoins.Add(join, joins.First( ));
}
childTable = parent;
}
return(childTable == arg.Destination);
}
private List <string> GenerateAndAddJoinWithChild(DbJoin arg)
{
string joinText = GetJoinWithChild(arg.Destination);
return(new List <string> (new string[] { joinText }));
}
private List <string> GenerateAndAddNewJoin(DbJoin arg)
{
string joinText = GetJoinWithParent(arg.Source);
return(new List <string> (new string[] { joinText }));
}