Progamatically setting JSON View

[Vaibhav Dhawan]

Hello,

Looking for a way to decide a json view on runtime based on certain conditions with dw 0.9.2. Example

if role is user, return userview.class
if role is admin, return adminview.class

I could see that MappingJacksonValue class provides a similar feature in spring boot and mvc. What would be the corresponding thing for dropwizard?
I have tried role based annotations on the entities/dto's but those doesnt seem to work with dropwizard(not sure how to set security filtering feature with dw).

I am happy with views implementation, just if i could programmatically decide the view to be returned in my resource.


[frankgrimes97]

http://stackoverflow.com/questions/21778177/how-to-override-jsonview-in-jersey-resource-methods

[bladecatcher]

You should be able to retrieve the User Principal and though it , the Role that is assigned to the user. Will that work?

@RolesAllowed({"ADMIN","USER"})

@GET

public FreemarkerUserView getSecretPlan(@Context SecurityContext context) {

        User userPrincipal = (User) context.getUserPrincipal(); 

String role = userPrincipal.getRole();

if (role.equals("ADMIN")) {

return new AdminView();

} else if (role.equals("USER")) {

return new UserView();

}

throw new WebApplicationException();

}

[Vaibhav Dhawan]

Thanks frank. I will try this out.

bladecatcher, 

Yes, getting the role from principal is not an issue. However in my case, i have common entities that i am returning to the consumer and i am just using JsonViews to decide what should be returned to whom. Looks like in your case you care creating two different objects and returning them basis on role

Thanks

[Tatu Saloranta]

Frank's suggestion makes sense, as ObjectReader/WriterModifier was specifically intended to allow dynamic configuration of JSON Views.

It is not as simple to use as it ideally would be, but integrating configurability plug-in as part of request/response handling lifecycle is bit challenging with JAX-RS. On plus side this can be used to configure many different aspects aside from Views.

-+ Tatu +-

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