Issue generating links off of request mapping in parent class

[elennick]

I am running into a problem generating links off of routes in a specific scenario. I have a controller method in an abstract parent class that has a signature like this:

    @RequestMapping(method = RequestMethod.GET)
    public HttpEntity<CollectionResource> getCollection(
            @RequestParam(name = "offset") Integer offset,
            @RequestParam(name = "size") Integer size,
            @RequestParam(name = "sort") String sort,
            @RequestParam(name = "q") String q,
            @RequestParam(name = "filter") T filter)

...where T is a generic parameter specified by what is subclassing this parent class. In another unrelated resource, I link to the child class using AffordanceBuilder like so:

        Affordance links = AffordanceBuilder.linkTo(methodOn(
                ChildController.class)
                .getCollection(null, null, null, null, null))
                .withRel("resourcerelation");

What gets generated winds up looking like this:

href: "http://localhost:8080/apinull{?offset,size,sort,q,filter}"

...the obvious issue being that while the base url, context root and uri template all get generated properly, the path is coming through as "null".

Let me know if I can give more specific details about this or create a quick example app that demonstrates it. There is a lot more code around this than what I posted that could possibly have an effect.

[dschulten]

Hi Evan,

Thank you for the feedback.

Could you provide a test, just add to

https://github.com/dschulten/hydra-java/blob/master/hydra-spring/src/test/java/de/escalon/hypermedia/spring/hydra/HydraMessageConverterTest.java

That would be most helpful.

Best,
Dietrich

Am 08.02.2016 18:09 schrieb Evan Lennick notifications@github.com:

I am running into a problem generating links off of routes in a specific scenario. I have a controller method in an abstract parent class that has a signature like this:

@RequestMapping(method = RequestMethod.GET) public HttpEntity getCollection( @RequestParam(name = "offset") Integer offset, @RequestParam(name = "size") Integer size, @RequestParam(name = "sort") String sort, @RequestParam(name = "q") String q, @RequestParam(name = "filter") T filter)

...where T is a generic parameter specified by what is subclassing this parent class. In another unrelated resource, I link to the child class using AffordanceBuilder like so:

Affordance links = AffordanceBuilder.linkTo(methodOn( ChildController.class) .getCollection(null, null, null, null, null)) .withRel("resourcerelation");

What gets generated winds up looking like this:

href: "http://localhost:8080/apinull{?offset,size,sort,q,filter}"

...the obvious issue being that while the base url, context root and uri template all get generated properly, the path is coming through as "null".

Let me know if I can give more specific details about this or create a quick example app that demonstrates it. There is a lot more code around this than what I posted that could possibly have an effect.

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