On May 28, 2008, at 4:57 AM, Paul Sandoz wrote:
>
> I am now wondering whether this exception is way to restrictive and
> the returning of a null value should be equivalent to returning no
> content.
>
Here what the spec says about null:
3.3.3 Return Type
Resource methods MAY return void, Response or another Java type, these
return types are mapped to a response entity body as follows:
- void: Results in an empty entity body with a 204 status code.
- Response: Results in an entity body mapped from the Entity property
of the Response with the status code specified by the status property
of the Response. A null return value results in a 204 status code.
- Other: Results in an entity body mapped from the return type. If the
return value is not null a 200 status code is used, a null return
value results in a 204 status code.
The only slight edge case is that if a method returns a non-null
Response with a null entity then it has to set the status code
appropriately since it shouldn't be overridden by the runtime.
Marc.
> You can work around this by:
>
> return Response.noContent().build();
>
> What should we do for this case:
>
> return Response.ok(null, "text/plain").build();
>
> ?
>
> Should the rule be: if the entity is null and there is a Content-
> Type header present then that header should be ignored and a warning
> should be logged?
>
> Paul.
>
>> Thanks,
>> Frank Sauer
>> The "Content-Type" header is set to application/xml, but the
>> response has no entity:
>> javax.ws.rs.WebApplicationException
>> at
>> com.sun.ws.rest.impl.uri.rules.HttpMethodRule.verifyResponse(HttpMeth
>> odRule.java:209)
>> at
>> com.sun.ws.rest.impl.uri.rules.HttpMethodRule.accept(HttpMethodRule.j
>> ava:113)
>> at
>> com.sun.ws.rest.impl.uri.rules.RightHandPathRule.accept(RightHandPath
>> Rule.java:88)
>> at
>> com.sun.ws.rest.impl.uri.rules.ResourceClassRule.accept(ResourceClass
>> Rule.java:55)
>> at
>> com.sun.ws.rest.impl.uri.rules.RightHandPathRule.accept(RightHandPath
>> Rule.java:88)
>> at
>> com.sun.ws.rest.impl.uri.rules.RootResourceClassesRule.accept(RootRes
>> ourceClassesRule.java:49)
>> at
>> com.sun.ws.rest.impl.application.WebApplicationImpl.handleRequest(Web
>> ApplicationImpl.java:369)
>> at
>> com.sun.ws.rest.spi.container.servlet.ServletContainer.service(Servle
>> tContainer.java:130)
>> at javax.servlet.http.HttpServlet.service(HttpServlet.java:
>> 803)
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> ----------------\
> Paul Sandoz
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---
Marc Hadley <marc.hadley at sun.com>
CTO Office, Sun Microsystems.