Gson. Deserialize integers as integers and not as doubles

Question

I have json object with arbitary values inside. And I want to deserialize it in a Map. Everything is ok except converting integers to a doubles. See example:

Answer 1

Here is my example, the first part is the definition of the class that has an int type field.

import com.google.api.client.util.Key;

public class Folder {

    public static final String FIELD_NAME_CHILD_COUNT = "childCount";

    @Key(FIELD_NAME_CHILD_COUNT)
    public final int childCount;

    public Folder(int aChildCount) {
        childCount = aChildCount;
    }
}

Then the TypeAdapter to convert the number type in Gson to a Java object.

GsonBuilder gsb = new GsonBuilder();

gsb.registerTypeAdapter(Folder.class, new JsonDeserializer() {

            @Override
            public Folder deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {

                int value = json.getAsJsonObject().get("childCount").getAsJsonPrimitive().getAsInt();

                return new Folder(value);

            }
        }
);

The third part is the test data, and it works.

String gsonData =  new String("\"folder\":{\"childCount\":0}");