Re: [Resteasy-developers] custom parameter unmarshalling

[Bill B. <bb...@re...>]

I don't want to overload HeaderDelegate.

I will create a new @Provider interface for this.  Something like

public interface StringConverter<T>
{
    T fromString(String val);
    String toString(T val);
}

And then allow its use with @HeaderParam, @QueryParam, @PathParam, 
@MatrixParam, and @FormParam injected objects.

Sound good?

Michael Brackx wrote:
> That would be nice.
> How could a HeaderDelegate be "activated" for a parameter?
> 
> Michael
> 
> On Fri, Oct 24, 2008 at 6:19 PM, Bill Burke <bb...@re...> wrote:
>> There's is HeaderDelegate in the specification. I could make sure that is
>> used for all String parameters.
>>
>> Michael Brackx wrote:
>>> Hi,
>>>
>>> It would be nice to have some sort of custom parameter unmarshalling.
>>> Currently parameter types can be String, primitive, or a class that
>>> has a String constructor or static valueOf(String) method.
>>> Some use cases:
>>> - injecting interfaces
>>> - injecting Enums (they already have a static valueOf(String) method)
>>> - injecting thirdparty classes
>>> - injecting factory created objects
>>>
>>> example:
>>>
>>> @GET
>>> @Path("/book/{isbn}")
>>> public String getBook(@PathParm(value = "isbn", provider =
>>> ISBNFactory.class)  ISBN id) {
>>>  ...
>>> }
>>>
>>> @Provider
>>> public class ISBNFactory {
>>>  @ProviderMethod
>>>  public ISBN create(String value) {
>>>   return new ISBNImpl(value);
>>>  }
>>> }
>>>
>>> The @ProviderMethod could be left out if there is only one matching
>>> method.
>>> Or a new interface could be used, to be more in line with ExceptionMapper.
>>>
>>> I realize the spec is final, but someday the will be a 1.1 or 2.0 :)
>>> Any comments?
>>>
>>> Michael Brackx
>>>
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>> --
>> Bill Burke
>> JBoss, a division of Red Hat
>> http://bill.burkecentral.com
>>

-- 
Bill Burke
JBoss, a division of Red Hat
http://bill.burkecentral.com