ArtistV2.java

package com.bang_olufsen.bnrc.content.playableContent;

import com.bang_olufsen.bnrc.BnrProduct;
import com.bang_olufsen.bnrc.GsonFactory;
import com.bang_olufsen.bnrc.common.Image;
import com.bang_olufsen.bnrc.core.BnrObject;
import com.google.common.base.MoreObjects;
import com.google.gson.Gson;
import com.google.gson.JsonSyntaxException;
import com.google.gson.TypeAdapter;
import com.google.gson.stream.JsonReader;
import com.google.gson.stream.JsonWriter;

import java.io.IOException;

public class ArtistV2 implements BnrObject {
    public final String id;
    public final String name;
    public final String artistNameNormalized;
    public final transient Image image;

    public ArtistV2(String id, String name, String artistNameNormalized, Image image) {
        this.id = id;
        this.name = name;
        this.artistNameNormalized = artistNameNormalized;
        this.image = image;
    }

    @Override
    public void bindContext(BnrProduct product, String path) {

    }

    public static class DeezerArtist extends ArtistV2 {
        public final Deezer deezer;

        public DeezerArtist(String id, String name, String artistNameNormalized,
                Image image, Deezer deezer) {
            super(id, name, artistNameNormalized, image);
            this.deezer = deezer;
        }
    }

    public static class DlnaArtist extends ArtistV2 {
        public final Dlna dlna;

        public DlnaArtist(String id, String name, String artistNameNormalized,
                Image image, Dlna dlna) {
            super(id, name, artistNameNormalized, image);
            this.dlna = dlna;
        }
    }

    public static TypeAdapter<ArtistV2> buildTypeAdapter() {
        return new TypeAdapter<ArtistV2>() {
            @Override
            public void write(JsonWriter out, ArtistV2 value) throws IOException {
                GsonFactory.getInstance().toJson(value, ArtistV2.class, out);
            }

            @Override
            public ArtistV2 read(JsonReader in) throws IOException {
                Gson gson = GsonFactory.getInstance();
                String id = null;
                String name = null;
                String normalizedName = null;
                Image image = null;
                Deezer deezer = null;
                Dlna dlna = null;

                in.beginObject();
                while (in.hasNext()) {
                    switch (in.nextName()) {
                        case "id":
                            id = in.nextString();
                            break;
                        case "name":
                            name = in.nextString();
                            break;
                        case "artistNameNormalized":
                            normalizedName = in.nextString();
                            break;
                        case "image":
                            image = gson.fromJson(in, Image.class);
                            break;
                        case "deezer":
                            deezer = gson.fromJson(in, Deezer.class);
                            break;
                        case "dlna":
                            dlna = gson.fromJson(in, Dlna.class);
                            break;
                    }
                }
                in.endObject();
                if (deezer != null)
                    return new DeezerArtist(id, name, normalizedName, image, deezer);
                else if (dlna != null)
                    return new DlnaArtist(id, name, normalizedName, image, dlna);
                throw new JsonSyntaxException("Unrecognized Artist type.");
            }
        };
    }
}