private QueryScalarValue ExecuteBinaryOperation(QueryScalarValue firstValue, QueryScalarValue secondValue, Func <object, object, Type, object> evaluationMethod)
{
var t1 = (QueryClrPrimitiveType)firstValue.Type;
var t2 = (QueryClrPrimitiveType)secondValue.Type;
object v1 = firstValue.Value;
object v2 = secondValue.Value;
QueryClrPrimitiveType commonType = t1;
try
{
commonType = (QueryClrPrimitiveType)this.GetCommonType(t1, t2);
if (v1 == null || v2 == null)
{
return(commonType.CreateErrorValue(new QueryError("Null values are not supported for the operation.")));
}
var result = evaluationMethod(v1, v2, commonType.ClrType);
return(commonType.CreateValue(result));
}
catch (Exception ex)
{
return(commonType.CreateErrorValue(new QueryError(ex.Message)));
}
}
private QueryScalarValue EvaluateCast(object value, QueryClrPrimitiveType targetType)
{
object result = null;
if (value == null)
{
return(targetType.NullValue);
}
if (targetType.ClrType == typeof(bool))
{
result = Convert.ToBoolean(value, CultureInfo.InvariantCulture);
}
#if !SILVERLIGHT
if (targetType.ClrType == typeof(byte[]))
{
// TODO: figure out what's the intended behavior here
////result = Convert.ToBase64String(value as byte[], Base64FormattingOptions.None);
result = value as byte[];
}
#endif
if (targetType.ClrType == typeof(byte))
{
result = Convert.ToByte(value, CultureInfo.InvariantCulture);
}
if (targetType.ClrType == typeof(sbyte))
{
result = Convert.ToSByte(value, CultureInfo.InvariantCulture);
}
if (targetType.ClrType == typeof(char))
{
result = Convert.ToChar(value, CultureInfo.InvariantCulture);
}
if (targetType.ClrType == typeof(decimal))
{
result = Convert.ToDecimal(value, CultureInfo.InvariantCulture);
}
if (targetType.ClrType == typeof(double))
{
result = Convert.ToDouble(value, CultureInfo.InvariantCulture);
}
if (targetType.ClrType == typeof(float))
{
result = Convert.ToSingle(value, CultureInfo.InvariantCulture);
}
if (targetType.ClrType == typeof(int))
{
result = Convert.ToInt32(value, CultureInfo.InvariantCulture);
}
if (targetType.ClrType == typeof(uint))
{
result = Convert.ToUInt32(value, CultureInfo.InvariantCulture);
}
if (targetType.ClrType == typeof(long))
{
result = Convert.ToInt64(value, CultureInfo.InvariantCulture);
}
if (targetType.ClrType == typeof(ulong))
{
result = Convert.ToUInt64(value, CultureInfo.InvariantCulture);
}
if (targetType.ClrType == typeof(short))
{
result = Convert.ToInt16(value, CultureInfo.InvariantCulture);
}
if (targetType.ClrType == typeof(ushort))
{
result = Convert.ToUInt16(value, CultureInfo.InvariantCulture);
}
if (targetType.ClrType == typeof(string))
{
result = Convert.ToString(value, CultureInfo.InvariantCulture);
}
if (targetType.ClrType == typeof(DateTime))
{
result = Convert.ToDateTime(value, CultureInfo.InvariantCulture);
}
if (targetType.ClrType == typeof(Guid))
{
Type valueType = null;
if (value != null)
{
valueType = value.GetType();
}
if (valueType == typeof(Guid) || valueType == typeof(Guid?))
{
result = (Guid)value;
}
else if (value != null)
{
throw new InvalidCastException(string.Format(CultureInfo.InvariantCulture, "Cannot cast value of type '{0}' to guid", value.GetType()));
}
}
return(targetType.CreateValue(result));
}