public Expression IndexOfMethod(IndexOfMethod method, LiteralExpression[] arguments)
{
int result;
if (LiteralUtil.IsAnyNull(arguments))
{
result = -1;
}
else
{
result = LiteralUtil.CoerceString(arguments[0]).IndexOf(
LiteralUtil.CoerceString(arguments[1]),
StringComparison.InvariantCultureIgnoreCase
);
}
if (result == -1)
{
return(new LiteralExpression(null, LiteralType.Null));
}
else
{
return(new LiteralExpression(result + 1, LiteralType.Int));
}
}
public override IProjection IndexOfMethod(IndexOfMethod method, Expression[] arguments)
{
// The standard registered locate function expects three parameters,
// and the rest seems tot support it.
return(new SqlFunctionProjection(
"locate",
NHibernateUtil.Int32,
ProjectionVisitor.CreateProjection(arguments[1]),
ProjectionVisitor.CreateProjection(arguments[0]),
Projections.Constant(1)
));
}
public virtual TResult IndexOfMethod(IndexOfMethod method, Expression[] arguments)
{
throw new QueryNotSupportException();
}