com.platzi.silmood.the_fm.io.deserializer.TopArtistDeserializer.java Source code

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Here is the source code for com.platzi.silmood.the_fm.io.deserializer.TopArtistDeserializer.java

Source

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 com.platzi.silmood.the_fm.io.model.TopArtistsResponse;

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 TopArtistDeserializer implements JsonDeserializer<TopArtistsResponse> {

    @Override
    public TopArtistsResponse deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context)
            throws JsonParseException {
        Gson gson = new Gson();
        TopArtistsResponse response = gson.fromJson(json, TopArtistsResponse.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;
    }

}