Serializing null AutoValue object about auto-value-gson HOT 3 CLOSED

Call .nullSafe() on the TypeAdapter before registering it.

On Mon, Apr 18, 2016, 9:41 PM Nicolas Milliard [email protected]
wrote:

I am converting slowly my value objects to AutoValue with Gson extension.
I am having an issue for the following case:
(Pseudo code)

// Not an AutoValue (yet)
class A{
B b;
}

@autovalue
class B{
public abstract Boolean enabled();

public static TypeAdapter typeAdapter(Gson gson) {
return new AutoValue_B.GsonTypeAdapter(gson);
}
}

When I am trying to serialize A with gson and B is null I am getting a NPE
on the following line if (object.enabled() != null) inside $AutoValue_B:

@Override
public void write(JsonWriter jsonWriter, B object) throws IOException {
  jsonWriter.beginObject();
  if (object.enabled() != null) {
    jsonWriter.name("enabled");
    enabledAdapter.write(jsonWriter, object.enabled());
  }
  jsonWriter.endObject();
}

because object is null.

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#28

from auto-value-gson.

Keep in mind it returns a new null-safe instance which needs registered,
not modifies the existing one.

On Mon, Apr 18, 2016, 9:51 PM Jake Wharton [email protected] wrote:

Call .nullSafe() on the TypeAdapter before registering it.

On Mon, Apr 18, 2016, 9:41 PM Nicolas Milliard [email protected]
wrote:

I am converting slowly my value objects to AutoValue with Gson extension.
I am having an issue for the following case:
(Pseudo code)

// Not an AutoValue (yet)
class A{
B b;
}

@autovalue
class B{
public abstract Boolean enabled();

public static TypeAdapter typeAdapter(Gson gson) {
return new AutoValue_B.GsonTypeAdapter(gson);
}
}

When I am trying to serialize A with gson and B is null I am getting a
NPE on the following line if (object.enabled() != null) inside
$AutoValue_B:

@Override
public void write(JsonWriter jsonWriter, B object) throws IOException {
  jsonWriter.beginObject();
  if (object.enabled() != null) {
    jsonWriter.name("enabled");
    enabledAdapter.write(jsonWriter, object.enabled());
  }
  jsonWriter.endObject();
}

because object is null.

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#28

from auto-value-gson.

Thanks @JakeWharton. I missed that useful API.

from auto-value-gson.