On Tue, May 21, 2019 at 3:57 PM Uzh Valin <[email protected]> wrote:
>
> Ok, but how does Jackson know which custom mapper to call if we are simply
> putting obj.getFirstProperty() in the response map? I know need one value and
> would want the serializer to ignore all other properties regardless whether
> they have been initialized with default values.
It doesn't, but what I am saying is that your approach will not work as shown.
If you add String values, they will be JSON Strings and must be
escaped. That's how Strings are handled -- otherwise Jackson would
have to somehow re-parse String into JSON, and then go back to
serializing contents, adding significant overhead that is not usually
needed. Assuming that String was valid JSON; if not it would either
have throw exception, or quietly determine it has to be used as-is...
or something.
If you want to apply different rules there are a few ways you could
achieve that -- custom serializers are one way -- or you could
serialize-as-String-then-deserialize if you want to apply filtering.
Perhaps latter is the way to go.
In fact, you could probably use something like:
JsonNode node = mapper.valueToTree(inputValue);
results.put(key, node);
which would convert from POJO into JsonNode -- and this does use
serialize() methods, filtering, but with less overhead -- and then add
JsonNode as value to be serialized by "parent" mapper.
I think this might achieve what you are attempting here?
-+ Tatu +-
>
>
> On Tuesday, May 21, 2019 at 2:40:27 PM UTC-4, Tatu Saloranta wrote:
>>
>> Just one question:
>>
>>
>>>
>>> responseBody.put("firstProperty",
>>> serializeFirstProperty(obj.getFirstProperty()));
>>> responseBody.put("secondProperty",
>>> serializeSecondProperty(obj.getSecondProperty()));
>>> responseBody.put("thirdProperty",
>>> serializeThirdProperty(obj.getThirdProperty()));
>>
>>
>> Why do you serialize values? That is where "double-escaping" comes: you are
>> adding JSON String within content to be JSON serialized. Just add values as
>> is
>>
>> responseBody.put("firstProperty", obj.getFirstProperty());
>>
>> and contents would get serialized just once.
>>
>> -+ Tatu +-
>>
>>
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