public int CompareTo(object obj)
{
IndexNode <TIndex, TRow> tmp = (IndexNode <TIndex, TRow>)obj;
if (tmp == null)
{
throw new InvalidCastException(string.Format("Object is type: {0} , expected type: {1}", obj.GetType(),
this.GetType()));
}
Type inner = IndexBy.GetType();
Type outer = tmp.IndexBy.GetType();
//object value = Convert.ChangeType(tmp.IndexBy, typeof (TIndex));
return(IndexBy.CompareTo(tmp.IndexBy));
}
//Add a node when a row was added to the table
internal void AddIndexNode(TRow row)
{
ICollection <IndexNode <TIndex, TRow> > indexNodes = FindNodes(PropertyFunc(row), PropertyFunc(row));
//An indexnode is missing for the property value, need to add new node for that value
if (indexNodes.Count == 0)
{
IndexNode <TIndex, TRow> nodeToAdd = new IndexNode <TIndex, TRow>(PropertyFunc(row));
nodeToAdd.AddRow(row);
_tree.Add(nodeToAdd);
}
else
{
foreach (var indexNode in indexNodes)
{
indexNode.AddRow(row);
}
}
}
//Initilizing the index by providing the table data to be able to save a reference to the rows
//and also providing a Function that determine which property will be indexed.
private void InitIndex(IEnumerable <TRow> tableData)
{
//TIndex - Field like Name, Age TRow - Entity like Person
var groups = tableData.GroupBy(row => PropertyFunc(row));
var nodes = new List <IndexNode <TIndex, TRow> >();
foreach (var group in groups)
{
IndexNode <TIndex, TRow> node = new IndexNode <TIndex, TRow>(PropertyFunc(group.First()));
foreach (var row in group)
{
node.AddRow(row);
}
nodes.Add(node);
}
_tree.Add(nodes);
}
