even moving annotation to the field did not work.
Note I have annotated class ItemRow class which ofcourse i can't since it
is part of legacy code.
On Friday, December 21, 2018 at 12:49:21 PM UTC-8, Tatu Saloranta wrote:
>
> On Fri, Dec 21, 2018 at 12:06 AM matt Smith <matt.smi...@gmail.com
> <javascript:>> wrote:
> >
> > so I have made this wrapper and annotated getter with @JsonSerialize.
> however, I do not see it being applied. what is wrong here?
>
> That looks like it should work. If not, a unit test & issue would make
> sense.
>
> -+ Tatu +-
>
> >
> > public class Wrapper {
> >
> >
> > private Map<RecordDomain, ItemRow> foo;
> >
> >
> > public Wrapper(Map<RecordDomain, ItemRow> fooz) {
> > foo = new HashMap<>(fooz);
> > }
> >
> >
> > @JsonSerialize( contentUsing = ItemRowSerializer.class)
> > public Map<RecordDomain, ItemRow> getFoo() {
> > return foo;
> > }
> >
> >
> > public void setFoo(Map<RecordDomain, ItemRow> foo) {
> > this.foo = foo;
> > }
> > }
> >
> >
> > On Thursday, December 20, 2018 at 1:25:59 PM UTC-8, Tatu Saloranta
> wrote:
> >>
> >> On Thu, Dec 20, 2018 at 11:22 AM matt Smith <matt.smi...@gmail.com>
> wrote:
> >> >
> >> > I encountered a case where class level JsonSerializable annotation
> does not require registration with Simple Module but method level does.
> >>
> >> Hmmh. This seems odd, let's see.
> >>
> >> > Here is the example I tried
> >> >
> >> > @JsonSerialize(using = ItemRowSerializer.class )
> >> > private ItemRow tes
> >> > tItem(){
> >> > return new ItemRow("abc", Arrays.asList("item1", "item2",
> "item3"));
> >> > }
> >> >
> >> >
> >> > I test it out like this
> >> >
> >> >
> >> > String jsonResult = new
> ObjectMapper().writeValueAsString(testItem());
> >> > System.out.println(jsonResult);
> >> >
> >> > I noticed that jsonString did not serialize using ItemRowSerializer.
> >>
> >> Ah. No, it won't. Jackson does not see you calling the method; Jackson
> >> sees the object you pass, which was returned by the method. There is
> >> no linkage there: Jackson can only introspects classes you pass to it.
> >>
> >> > However, when I did this, it gave the expected jsonString
> >> >
> >> >
> >> > SimpleModule module = new SimpleModule()
> >> > module.addSerializer(ItemRowSerializer.class)
> >> > mapper.register(module);
> >> > String jsonResult = new
> ObjectMapper().writeValueAsString(testItem());
> >> > System.out.println(jsonResult);
> >> >
> >> >
> >> > On the otherhand, if I had my ItemRow class annoated with
> @JsonSerializable, there was no need with module at all.
> >>
> >> I think you mean `@JsonSerialize` here (there is interface type
> >> `JsonSerializable`, but no annotation).
> >>
> >> > i.e
> >> >
> >> > @JsonSerializable(using = ItemRowSerailizer
> >> > public class ItemRow<T> {...}
> >> >
> >> >
> >> > Since I am passing this serialized object over the wire, I do not
> prefer to write to mapper and send string representation across.
> >> >
> >> > how would I go about getting method level annotation working without
> module registration?
> >>
> >> Method level annotations only work when property is accessed via
> >> method (or field) in question.
> >>
> >> So if you had something like:
> >>
> >> public class Rows
> >> @JsonSerialize(using = .... )
> >> public ItemRow<Type> getRows() { ... }
> >> }
> >>
> >> and serialized an instance of `Rows`, serializer would be found. But
> >> for root values, there is no such reference.
> >>
> >> On related note, I strongly recommend always using a wrapper type
> >> around generic values, so that root value is never of generic type.
> >> Reason for this is that Java Type Erasure will often cause problems if
> >> attempting to pass an instance of generic type -- so Jackson can not
> >> detect intended type (all it sees is type variable from class
> >> declaration).
> >>
> >> So, attempts to serialize, say, Row<T>, will be seen as `Row<?>`, and
> >> possibly (although not always) cause issues in finding handlers for
> >> the type -- for example, if value type has annotations, they may not
> >> be visible.
> >>
> >> -+ Tatu +-
> >
> > --
> > You received this message because you are subscribed to the Google
> Groups "jackson-user" group.
> > To unsubscribe from this group and stop receiving emails from it, send
> an email to jackson-user...@googlegroups.com <javascript:>.
> > To post to this group, send email to jackso...@googlegroups.com
> <javascript:>.
> > For more options, visit https://groups.google.com/d/optout.
>
--
You received this message because you are subscribed to the Google Groups
"jackson-user" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to jackson-user+unsubscr...@googlegroups.com.
To post to this group, send email to jackson-user@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.
