/// <summary>
/// Compiles equations between left and right and based on Operation specified, determines the mathematical binary expression and sends the output back to caller.
/// </summary>
/// <param name="oper">Comparison Operation (APIConditionOperator)</param>
/// <returns></returns>
private bool CompareOperands(APIConditionOperator oper)
{
Expression <Func <string, string, bool> > expression = null;
switch (oper)
{
case APIConditionOperator.EQ: expression = (left, right) => left.Equals(right); break;
case APIConditionOperator.NE: expression = (left, right) => !left.Equals(right); break;
case APIConditionOperator.GT: expression = (left, right) => left.ToDouble() > right.ToDouble(); break;
case APIConditionOperator.LT: expression = (left, right) => left.ToDouble() < right.ToDouble(); break;
case APIConditionOperator.GE: expression = (left, right) => left.ToDouble() >= right.ToDouble(); break;
case APIConditionOperator.LE: expression = (left, right) => left.ToDouble() <= right.ToDouble(); break;
}
if (expression != null)
{
var delegateOperation = expression.Compile();
var res = delegateOperation(Left, Right);
return(res);
}
else
{
return(false);
}
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="objects">Objects to get equation place holder values.</param>
/// <param name="operand">Template mathematical equation for left side operand</param>
/// <param name="oper">Comparison operation as of now.</param>
/// <param name="comparer">Template mathematical equation for right side operand</param>
internal APIExpression(List <object> objects, string operand, APIConditionOperator oper, string comparer)
{
Objects = objects;
Operand = operand;
Operator = oper;
Comparer = comparer;
}
