public static object Negate(object target)
{
if (target == null)
{
return(null);
}
if (target.GetType().IsCOMObject)
{
target = GetDefaultPropertyValue(target);
}
return(-(double)BuiltInFunctions.CDbl(target));
}
public static object Not(object target)
{
if (target == null)
{
return(null);
}
if (target.GetType().IsCOMObject)
{
target = GetDefaultPropertyValue(target);
}
return(!(bool)BuiltInFunctions.CBool(target));
}
public static object BinaryOp(ExpressionType op, object left, object right)
{
if (left == null || right == null)
{
if (op == ExpressionType.Equal)
{
if (left == null && right == null)
{
return(true);
}
else if (string.Empty.Equals(left) || string.Empty.Equals(right))
{
return(true);
}
else
{
return(false);
}
}
else if (op == ExpressionType.NotEqual)
{
if (left == null && right == null)
{
return(false);
}
else if (string.Empty.Equals(left) || string.Empty.Equals(right))
{
return(false);
}
else
{
return(true);
}
}
else
{
return(null);
}
}
Type ltype = left.GetType();
Type rtype = right.GetType();
if (op == ExpressionType.Equal)
{
if (left == right)
{
return(true);
}
}
if (ltype.IsCOMObject)
{
left = GetDefaultPropertyValue(left);
ltype = left.GetType();
}
if (rtype.IsCOMObject)
{
right = GetDefaultPropertyValue(right);
rtype = right.GetType();
}
if (!ltype.IsValueType && ltype != typeof(string))
{
left = left.ToString();
ltype = typeof(string);
}
if (!rtype.IsValueType && rtype != typeof(string))
{
right = right.ToString();
rtype = typeof(string);
}
Type targetType;
if (ltype == rtype || CanConvert(rtype, ltype))
{
targetType = ltype;
}
else
{
targetType = rtype;
}
switch (op)
{
case ExpressionType.Add:
if (targetType == typeof(int))
{
return(Convert.ToInt32(left) + Convert.ToInt32(right));
}
else if (targetType == typeof(double))
{
return(Convert.ToDouble(left) + Convert.ToDouble(right));
}
else if (targetType == typeof(long))
{
return(Convert.ToInt64(left) + Convert.ToInt64(right));
}
else if (targetType == typeof(float))
{
return(Convert.ToSingle(left) + Convert.ToSingle(right));
}
else if (targetType == typeof(decimal))
{
return(Convert.ToDecimal(left) + Convert.ToDecimal(right));
}
else if (targetType == typeof(string))
{
return((string)left + (string)right);
}
break;
case ExpressionType.Subtract:
if (targetType == typeof(int))
{
return(Convert.ToInt32(left) - Convert.ToInt32(right));
}
else if (targetType == typeof(double) || targetType == typeof(string))
{
return(Convert.ToDouble(left) - Convert.ToDouble(right));
}
else if (targetType == typeof(long))
{
return(Convert.ToInt64(left) - Convert.ToInt64(right));
}
else if (targetType == typeof(float))
{
return(Convert.ToSingle(left) - Convert.ToSingle(right));
}
else if (targetType == typeof(decimal))
{
return(Convert.ToDecimal(left) - Convert.ToDecimal(right));
}
break;
case ExpressionType.Multiply:
if (targetType == typeof(int))
{
return(Convert.ToInt32(left) * Convert.ToInt32(right));
}
else if (targetType == typeof(double) || targetType == typeof(string))
{
return(Convert.ToDouble(left) * Convert.ToDouble(right));
}
else if (targetType == typeof(long))
{
return(Convert.ToInt64(left) * Convert.ToInt64(right));
}
else if (targetType == typeof(float))
{
return(Convert.ToSingle(left) * Convert.ToSingle(right));
}
else if (targetType == typeof(decimal))
{
return(Convert.ToDecimal(left) * Convert.ToDecimal(right));
}
break;
case ExpressionType.Divide:
if (targetType == typeof(int))
{
return(Convert.ToInt32(left) / Convert.ToInt32(right));
}
else if (targetType == typeof(double) || targetType == typeof(string))
{
return(Convert.ToDouble(left) / Convert.ToDouble(right));
}
else if (targetType == typeof(long))
{
return(Convert.ToInt64(left) / Convert.ToInt64(right));
}
else if (targetType == typeof(float))
{
return(Convert.ToSingle(left) / Convert.ToSingle(right));
}
else if (targetType == typeof(decimal))
{
return(Convert.ToDecimal(left) / Convert.ToDecimal(right));
}
break;
case ExpressionType.Equal:
try
{
if (targetType == typeof(int))
{
return(Convert.ToInt32(left) == Convert.ToInt32(right));
}
else if (targetType == typeof(double))
{
return(Convert.ToDouble(left) == Convert.ToDouble(right));
}
else if (targetType == typeof(long))
{
return(Convert.ToInt64(left) == Convert.ToInt64(right));
}
else if (targetType == typeof(float))
{
return(Convert.ToSingle(left) == Convert.ToSingle(right));
}
else if (targetType == typeof(decimal))
{
return(Convert.ToDecimal(left) == Convert.ToDecimal(right));
}
else if (targetType == typeof(string))
{
return(((string)left).Equals(right));
}
else if (targetType == typeof(DateTime))
{
return(Convert.ToDateTime(left) == Convert.ToDateTime(right));
}
else
{
return(left == right);
}
}
catch (Exception ex)
{
return(false);
}
case ExpressionType.NotEqual:
try
{
if (targetType == typeof(int))
{
return(Convert.ToInt32(left) != Convert.ToInt32(right));
}
else if (targetType == typeof(double))
{
return(Convert.ToDouble(left) != Convert.ToDouble(right));
}
else if (targetType == typeof(long))
{
return(Convert.ToInt64(left) != Convert.ToInt64(right));
}
else if (targetType == typeof(float))
{
return(Convert.ToSingle(left) != Convert.ToSingle(right));
}
else if (targetType == typeof(decimal))
{
return(Convert.ToDecimal(left) != Convert.ToDecimal(right));
}
else if (targetType == typeof(string))
{
return(!((string)left).Equals(right));
}
else if (targetType == typeof(DateTime))
{
return(Convert.ToDateTime(left) != Convert.ToDateTime(right));
}
else
{
return(left != right);
}
}
catch (Exception ex)
{
return(true);
}
case ExpressionType.GreaterThan:
if (targetType == typeof(int))
{
return(Convert.ToInt32(left) > Convert.ToInt32(right));
}
else if (targetType == typeof(double))
{
return(Convert.ToDouble(left) > Convert.ToDouble(right));
}
else if (targetType == typeof(long))
{
return(Convert.ToInt64(left) > Convert.ToInt64(right));
}
else if (targetType == typeof(float))
{
return(Convert.ToSingle(left) > Convert.ToSingle(right));
}
else if (targetType == typeof(decimal))
{
return(Convert.ToDecimal(left) > Convert.ToDecimal(right));
}
else if (targetType == typeof(string))
{
int result = ((string)left).CompareTo(right);
return(result > 0);
}
else if (targetType == typeof(DateTime))
{
return(Convert.ToDateTime(left) > Convert.ToDateTime(right));
}
break;
case ExpressionType.GreaterThanOrEqual:
if (targetType == typeof(int))
{
return(Convert.ToInt32(left) >= Convert.ToInt32(right));
}
else if (targetType == typeof(double))
{
return(Convert.ToDouble(left) >= Convert.ToDouble(right));
}
else if (targetType == typeof(long))
{
return(Convert.ToInt64(left) >= Convert.ToInt64(right));
}
else if (targetType == typeof(float))
{
return(Convert.ToSingle(left) >= Convert.ToSingle(right));
}
else if (targetType == typeof(decimal))
{
return(Convert.ToDecimal(left) >= Convert.ToDecimal(right));
}
else if (targetType == typeof(string))
{
int result = ((string)left).CompareTo(right);
return(result >= 0);
}
else if (targetType == typeof(DateTime))
{
return(Convert.ToDateTime(left) >= Convert.ToDateTime(right));
}
break;
case ExpressionType.LessThan:
if (targetType == typeof(int))
{
return(Convert.ToInt32(left) < Convert.ToInt32(right));
}
else if (targetType == typeof(double))
{
return(Convert.ToDouble(left) < Convert.ToDouble(right));
}
else if (targetType == typeof(long))
{
return(Convert.ToInt64(left) < Convert.ToInt64(right));
}
else if (targetType == typeof(float))
{
return(Convert.ToSingle(left) < Convert.ToSingle(right));
}
else if (targetType == typeof(decimal))
{
return(Convert.ToDecimal(left) < Convert.ToDecimal(right));
}
else if (targetType == typeof(string))
{
int result = ((string)left).CompareTo(right);
return(result < 0);
}
else if (targetType == typeof(DateTime))
{
return(Convert.ToDateTime(left) < Convert.ToDateTime(right));
}
break;
case ExpressionType.LessThanOrEqual:
if (targetType == typeof(int))
{
return(Convert.ToInt32(left) <= Convert.ToInt32(right));
}
else if (targetType == typeof(double))
{
return(Convert.ToDouble(left) <= Convert.ToDouble(right));
}
else if (targetType == typeof(long))
{
return(Convert.ToInt64(left) <= Convert.ToInt64(right));
}
else if (targetType == typeof(float))
{
return(Convert.ToSingle(left) <= Convert.ToSingle(right));
}
else if (targetType == typeof(decimal))
{
return(Convert.ToDecimal(left) <= Convert.ToDecimal(right));
}
else if (targetType == typeof(string))
{
int result = ((string)left).CompareTo(right);
return(result <= 0);
}
else if (targetType == typeof(DateTime))
{
return(Convert.ToDateTime(left) <= Convert.ToDateTime(right));
}
break;
case ExpressionType.And:
if (targetType == typeof(bool))
{
return((bool)left && (bool)right);
}
else if (targetType == typeof(int))
{
return(Convert.ToInt32(left) & Convert.ToInt32(right));
}
else if (targetType == typeof(long))
{
return(Convert.ToInt64(left) & Convert.ToInt64(right));
}
else
{
return((bool)BuiltInFunctions.CBool(left) && (bool)BuiltInFunctions.CBool(right));
}
break;
case ExpressionType.Or:
if (targetType == typeof(bool))
{
return((bool)left || (bool)right);
}
else if (targetType == typeof(int))
{
return(Convert.ToInt32(left) | Convert.ToInt32(right));
}
else if (targetType == typeof(long))
{
return(Convert.ToInt64(left) | Convert.ToInt64(right));
}
else
{
return((bool)BuiltInFunctions.CBool(left) || (bool)BuiltInFunctions.CBool(right));
}
break;
}
throw new ArgumentException(string.Format("Operation {0} between {1} and {2} is not implemeted.", op, ltype.Name, rtype.Name));
}
