MyTypeAdapter

package com.website.app;

import com.google.gson.TypeAdapter;
import com.google.gson.stream.JsonReader;
import com.google.gson.stream.JsonToken;
import com.google.gson.stream.JsonWriter;
import com.website.app.models.Monument;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class MonumentsTypeAdapter extends TypeAdapter<List<Monument>> {
    @Override public void write(JsonWriter out, List<Monument> value) throws IOException {
        // Not implemented
    }

    @Override public List<Monument> read(JsonReader in) throws IOException {
        JsonToken token = in.peek();
        switch (token) {
            case BEGIN_ARRAY:
                List<Monument> monuments = new ArrayList<Monument>();
                in.beginArray();
                while (in.hasNext()) {
                    Monument m = // TODO Deserialize using appropriate default GSON TypeAdapter?
                    monuments.add(m);
                }
                in.endArray();
                return monuments;

            case BEGIN_OBJECT:
                Monument m = // TODO Deserialize using appropriate default GSON TypeAdapter?
                return Collections.singletonList(m);

            case NULL:
                in.nextNull();
                return null;

            default:
                throw new IllegalStateException();
        }
    }
}