/// <summary>
/// Returns an Integer indicating the Ordering of this Node compared to another Node.
/// </summary>
/// <param name="other">Node to test against.</param>
/// <returns></returns>
public override int CompareTo(INode other)
{
if (ReferenceEquals(this, other))
{
return(0);
}
if (other == null)
{
// Blank Nodes are considered greater than nulls
// So we return a 1 to indicate we're greater than it
return(1);
}
else if (other.NodeType == NodeType.Variable)
{
// Blank Nodes are considered greater than Variables
return(1);
}
else if (other.NodeType == NodeType.Blank)
{
// Order Blank Nodes lexically by their ID
return(ComparisonHelper.CompareBlankNodes(this, (IBlankNode)other));
}
else
{
// Anything else is greater than a Blank Node
// So we return a -1 to indicate we are less than the other Node
return(-1);
}
}
/// <summary>
/// Returns an Integer indicating the Ordering of this Node compared to another Node.
/// </summary>
/// <param name="other">Node to test against.</param>
/// <returns></returns>
public override int CompareTo(IBlankNode other)
{
if (ReferenceEquals(this, other))
{
return(0);
}
if (other == null)
{
// We are always greater than nulls
return(1);
}
else
{
// Order lexically on ID
return(ComparisonHelper.CompareBlankNodes(this, other));
}
}
