public bool CompareExpression(IExpression expression, Dictionary<string, object> properties)
{
if (expression == null)
return true;
var expressionType = expression.GetTypeOfObj();
if (expressionType.IsTypeOf<Condition>())
return CompareCondition(expression.CastObj<Condition>(), properties);
if (expressionType.IsTypeOf<Junction>())
return CompareJunction(expression.CastObj<Junction>(), properties);
throw new Exception(string.Format("Unknown {0} implementation : {1}",
typeof(IExpression).FullName, expressionType.FullName));
}