/// <summary>Create from XML.</summary>
public override void ReadXml(XmlReader reader)
{
// get the data source table and field
string[] ds = reader.GetAttribute("field").Split(new char[] { '.' }, 2, StringSplitOptions.RemoveEmptyEntries);
// set the operand
this._operand = reader.GetAttribute("operand");
// set the operator
string op = reader.GetAttribute("operator");
FilterOperatorType type = (FilterOperatorType)Enum.Parse(typeof(FilterOperatorType), op);
this._op = FilterOperator.GetOperator(type);
// create a new attribute & parent element entity
QueryEngine.Attribute attr = new QueryEngine.Attribute(ds[1], ds[1]);
QueryEngine.Entity parent = new QueryEngine.Entity(ds[0], ds[0]);
attr.Parent = parent;
this._attr = attr;
}
/// <summary>Constructor</summary>
public FilterExpression(Attribute a, FilterOperatorType type, string rhs) : this(a, FilterOperator.GetOperator(type), rhs)
{
}