Re: [Resteasy-users] validation of method parameters

[Savvas A. M. <sav...@gm...>]

Hi Dave,

Not really sure why the bean validation stuff doesn't work but in order to
bind form params you probably need to configure your resource method and
binding class in a different way. Try the following:

@GET
public <my object class, not important>
resourceMethod(@Valid @*BeanParam* MyParams params)
{
...
}

public class MyParams {

    @FormParam("a")
    private ArrayList<String> stringList = new ArrayList<>();

...
}

This should bind your form params into your MyParams class.

A minor side note: The convention many frameworks use when binding http
params at method level is the POJO one (i.e. *set*This()/*get*This() rather
than addThis() etc)

HTF,
Savvas

On 19 February 2015 at 19:48, Dave J <dev...@gm...> wrote:

> Hello,
>
> After some nontrivial research I thought I would try this list in the
> hopes more expert users could help me figure out where I am going wrong.
> I am using RESTeasy 3.0.9. I am trying to affect validation of a parameter
> coming in on the URL for a GET request.
>
> I use a class to aggregate validation & storage of the set of parameters
> coming in on the URL.
>
> I start with this:
>
> @GET
> public <my object class, not important>
> resourceMethod(@Valid @Form MyParams params)
> {
> ...
> }
>
> The parameter of interest is a String, and can occur more than once. Let's
> name it "a".
> I would like to validate each occurrence (I want to check that its length
> is within a certain range), and if valid, I would like to add the String to
> a list. Otherwise, stop and report the error.
>
> So within the MyParams class....
>
> public class MyParams {
>
>     private ArrayList<String> stringList = new ArrayList<String>();
>
> ...
>
>     // Would rather this return void, but validation doesn't like
> constraints on void methods
>     @QueryParam('a")
>     public String addString(@Size(min=8,max=10) String str) {
>         stringList.add(str);
>         return null;
>      }
> }
>
>
> However in this scenario, the incoming string is neither validated nor
> added to the list.
>
> Is it possible to do this within RESTeasy? I'm happy to provide more info
> if needed.
>
> Thanks.
>
>
>
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