Exposing `Type` parameter about reservoir HOT 2 CLOSED

    /**
     * Get an object from Reservoir with the given key. This a blocking IO operation.
     *
     * @param key      the key string.
     * @param type the Type of the expected return object.
     * @return the object of the given type if it exists, otherwise <code>null</code>.
     * @throws java.lang.NullPointerException if key does not exist or java.lang.IOException if reading from file fails.
     */
    public static <T> T getByType(String key, Type type) throws Exception {
        String json = cache.getString(key).getString();
        return new Gson().fromJson(json, type);
    }


    /**
     * Get an object from Reservoir with the given key asynchronously.
     *
     * @param key      the key string.
     * @param type the Type of the expected return object.
     * @param callback a callback of type {@link com.anupcowkur.reservoir.ReservoirGetCallback}
     *                 which is called upon completion.
     */
    public static <T> void getAsyncByType(String key, Type type, ReservoirGetCallback<T> callback) {
        new GetByKeyAndTypeTask<>(key, type, callback).execute();
    }


    /**
     * AsyncTask to perform get operation in a background thread.
     */
    private static class GetByKeyAndTypeTask<T> extends AsyncTask<Void, Void, T> {

        private final String key;
        private final ReservoirGetCallback<T> callback;
        private final Type type;
        private Exception e;

        private GetByKeyAndTypeTask(String key, Type type, ReservoirGetCallback<T> callback) {
            this.key = key;
            this.callback = callback;
            this.type = type;
            this.e = null;
        }

        @Override
        protected T doInBackground(Void... params) {
            try {
                String json = cache.getString(key).getString();
                T value = new Gson().fromJson(json, type);
                if (value == null)
                    throw new NullPointerException();
                return value;
            } catch (Exception e) {
                this.e = e;
                return null;
            }
        }

        @Override
        protected void onPostExecute(T object) {
            if (callback != null) {
                if (e == null) {
                    callback.onSuccess(object);
                } else {
                    callback.onFailure(e);
                }
            }
        }
    }