Java tutorial
package com.platzi.silmood.the_fm.io.deserializer; import com.google.gson.Gson; import com.google.gson.JsonArray; import com.google.gson.JsonDeserializationContext; import com.google.gson.JsonDeserializer; import com.google.gson.JsonElement; import com.google.gson.JsonObject; import com.google.gson.JsonParseException; import com.platzi.silmood.the_fm.domain.Artist; import com.platzi.silmood.the_fm.io.model.HypedArtistResponse; import com.platzi.silmood.the_fm.io.model.JsonKeys; import java.lang.reflect.Type; import java.util.ArrayList; /** * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * <p/> * http://www.apache.org/licenses/LICENSE-2.0 * <p/> * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. * <p/> * Created by Pedro Hernndez on 07/2015. */ public class HypedArtistsResponseDeserializer implements JsonDeserializer<HypedArtistResponse> { @Override public HypedArtistResponse deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException { Gson gson = new Gson(); HypedArtistResponse response = gson.fromJson(json, HypedArtistResponse.class); //The artists array will be parsed manually due nested elements JsonObject artistsResponseData = json.getAsJsonObject().getAsJsonObject(JsonKeys.ARTISTS_RESPONSE); JsonArray artistsArray = artistsResponseData.getAsJsonArray(JsonKeys.ARTISTS_ARRAY); response.setArtists(extractArtistsFromJsonArray(artistsArray)); return response; } private ArrayList<Artist> extractArtistsFromJsonArray(JsonArray artistsArray) { ArrayList<Artist> artists = new ArrayList<>(); for (int i = 0; i < artistsArray.size(); i++) { JsonObject artistData = artistsArray.get(i).getAsJsonObject(); Artist currentArtist = Artist.buildArtistFromJson(artistData) .extractUrlsFromImagesArray(artistData.getAsJsonArray(JsonKeys.ARTIST_IMAGES)); artists.add(currentArtist); } return artists; } }