Hi,
I have a resource that takes a POST request with JSON payload. Let's say it
takes an *int[]*, and for our purposes simply returns it. There are (at
least) two ways to do this:
(1) Accept an *int[]*, letting Jackson auto-deserialize it. For echoing,
return the deserialized array.
@POST
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
public int[] postObject(final int[] userData) {
return userData;
}
(2) This version accepts a *byte[]*, and then internally deserializes it to
the *int[]* object to be returned.
@POST
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
public int[] postObject(final byte[] userData) {
ObjectMapper mapper = new ObjectMapper();
try {
return mapper.readValue(userData, int[].class);
} catch (Exception e) {
throw new WebApplicationException(Status.BAD_REQUEST);
}
}
Suppose that the request is not deserializable to an *int[]*. E.g.,
[1, 2, 'a']
or
[1, 2,
?
In method 1, the deserialization error will result in a *null* argument
passed to the *postObject* function and the user will get a *204 NO CONTENT*
response.
In method 2, the deserialization error will result in a catchable
exception, and the client will now get a *400 BAD REQUEST* response.
Is there a way to make method 1 result in a 400 error? Is there a handler
function for those types exceptions? It is quite bulky to have to wrap
every single API call like method 2, but the 204 response is just wrong.
Thanks,
Dan
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