Yes as Dale points our, the Integer.class is to hint to the xpath
engine that it should evaluate it as a number and not NodeSet / Node
as it would do out of the box.
So an improvement is needed in the Scala DSL. Fell free to log a JIRA
and work on a patch.
On Wed, Oct 2, 2013 at 2:19 PM, Dale King <dalewk...@gmail.com> wrote:
> A conversion after the fact does not help in this case as evaluating the
> expression itself fails with an exception unless you tell the xpath what
> the correct result type will be. If you don't specify, it assumes node set.
> In the case of a count expression the result is a number which cannot be
> converted to node set.
>
> For the record I am dealing with something like this in Java DSL:
>
> setHeader("fooCount", xpath("count(/bar/foo)", Integer.class))
>
> Without the Integer.class parameter this throws an exception. The Scala DSL
> does not support adding the return type and no conversion after the fact
> will fix it.
> On Oct 2, 2013 1:46 AM, "kraythe ." <kray...@gmail.com> wrote:
>
>> Write an implicit conversion.
>>
>> Scala doesnt manage return types much. Its unnecessary baggage. I rather
>> like that and wish I could use it in my work.
>>
>> *Robert Simmons Jr. MSc. - Lead Java Architect @ EA*
>> *Author of: Hardcore Java (2003) and Maintainable Java (2012)*
>> *LinkedIn: **http://www.linkedin.com/pub/robert-simmons/40/852/a39*
>>
>>
>> On Tue, Oct 1, 2013 at 8:55 PM, Dale King <dalewk...@gmail.com> wrote:
>>
>> > The language support in the Scala DSL is too simplistic in that it does
>> not
>> > support all the options of Java DSL.
>> >
>> > In particular it does not allow setting the return type of the
>> expression.
>> > In my case I am trying to set a header to the result of an xpath count
>> > expression. In the Java DSL this fails unless you explicitly set the
>> return
>> > type of the xpath expression because the default return type for xpath
>> is a
>> > node set and it cannot convert a number to a node set.
>> >
>> > It also lacks all the other overloads for things like Namespaces on
>> xpath,
>> > etc.
>> >
>> > --
>> > Dale King
>> >
>>
--
Claus Ibsen
-----------------
Red Hat, Inc.
Email: cib...@redhat.com
Twitter: davsclaus
Blog: http://davsclaus.com
Author of Camel in Action: http://www.manning.com/ibsen
