simplify loop

import com.google.gson.TypeAdapter;

import com.google.gson.stream.JsonReader;

import com.google.gson.stream.JsonToken;

import com.google.gson.stream.JsonWriter;

import java.io.IOException;

    @Override

    public void write(JsonWriter out, PreviewObject value) {

        // not needed

    }

    @Override

        in.beginObject();

        while (in.hasNext()) {

            String name = in.nextName();

            if (name != null && !name.isEmpty()) {

                preview = readObject(name, in);

            String name = in.peek().toString();

            if (!name.isEmpty()) {

                preview = readObject(in);

            }

        }

        in.endObject();

        return preview;

    }

    private PreviewObject readObject(String tag, JsonReader in) throws IOException {

    private PreviewObject readObject(JsonReader in) throws IOException {

        String tag;

        PreviewObject preview = new PreviewObject();

        do {

            if (in.peek() == JsonToken.NAME) {

            tag = in.nextName();

            }

            switch (tag) {

                case "source":

    private String mimeType;

    private String view;

    public PreviewObject() {

    }

    public String getLink() {

        return link;

    }