public Expression CastMethod(CastMethod method, LiteralExpression[] arguments)
{
Debug.Assert(arguments[1].LiteralType == LiteralType.String);
if (arguments[0].LiteralType == LiteralType.Null)
{
return(arguments[0]);
}
var type = LiteralUtil.GetCompatibleType((string)arguments[1].Value);
try
{
return(new LiteralExpression(Convert.ChangeType(arguments[0].Value, type, CultureInfo.InvariantCulture)));
}
catch (Exception ex)
{
throw new ODataException(
String.Format(
ErrorMessages.Method_CannotCast, arguments[1].Value
),
ex
);
}
}
public override IProjection CastMethod(CastMethod method, Expression[] arguments)
{
var projection = ProjectionVisitor.CreateProjection(arguments[0]);
switch (LiteralUtil.CoerceString((LiteralExpression)arguments[1]))
{
case "Edm.Byte":
case "Edm.SByte":
case "Edm.Int16":
case "Edm.Int32":
return(new SqlFunctionProjection("round", NHibernateUtil.Int32, projection));
case "Edm.Int64":
return(new SqlFunctionProjection("round", NHibernateUtil.Int64, projection));
default:
return(projection);
}
}
public virtual TResult CastMethod(CastMethod method, Expression[] arguments)
{
throw new QueryNotSupportException();
}