//
// static factory methods
//
#region public static DBComparison Equal(DBClause from, DBClause to)
/// <summary>
/// Creates an equal comparison for the left and right clauses
/// </summary>
/// <param name="from"></param>
/// <param name="to"></param>
/// <returns></returns>
public static DBComparison Equal(DBClause from, DBClause to)
{
DBBinaryComparisonRef compref = new DBBinaryComparisonRef();
compref.Left = from;
compref.Right = to;
compref.CompareOperator = Tech.Data.Compare.Equals;
return(compref);
}
internal static DBComparison Compare()
{
DBBinaryComparisonRef comp = new DBBinaryComparisonRef();
comp.Left = null;
comp.Right = null;
comp.CompareOperator = Tech.Data.Compare.Equals;
return(comp);
}
/// <summary>
/// Creates a comparison operation between the left and right clauses
/// </summary>
/// <param name="from"></param>
/// <param name="op"></param>
/// <param name="to"></param>
/// <returns></returns>
public static DBComparison Compare(DBClause from, Compare op, DBClause to)
{
if (null == from)
{
throw new ArgumentNullException("from");
}
if (null == to)
{
throw new ArgumentNullException("to");
}
DBBinaryComparisonRef compref = new DBBinaryComparisonRef();
compref.Left = from;
compref.Right = to;
compref.CompareOperator = op;
return(compref);
}