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This project wraps the Spotify public API in order to allow users to intuitively use it

There is a newer version: 3.0.RELEASE

package com.lajospolya.spotifyapiwrapper.request;

import com.lajospolya.spotifyapiwrapper.internal.ISpotifyRequest;
import com.lajospolya.spotifyapiwrapper.spotifyexception.SpotifyRequestBuilderException;

/**
 * This is the base class for all Spotify Requests.
 * The SpotifyApiClient uses private methods on this field to authorize and built the request
 * @author Lajos Polya
 * @param  the type of the Response Body
 */
public abstract class AbstractSpotifyRequest
{
    static final String SPOTIFY_V1_API_URI = "https://api.spotify.com/v1/";

    private SpotifyRequestBuilder requestBuilder;
    private String accessToken;

    AbstractSpotifyRequest(SpotifyRequestBuilder requestBuilder)
    {
        this.requestBuilder = requestBuilder;
    }

    /**
     * The SpotifyApiClient uses IReflectiveSpotifyClientService to call this method via reflection to build the
     * request. In the near future this will be abstracted to an Http Request which doesn't couple Java 11's
     * HttpRequest.
     * This method is private to simplify the interface for end users.
     * @return ISpotifyRequest the built request
     */
    private ISpotifyRequest reflectiveBuildRequest()
    {
        if(accessToken == null)
        {
            throw new SpotifyRequestBuilderException("Cannot Build a request with a null access token");
        }
        return this.requestBuilder
                .build();
    }

    /**
     * The SpotifyApiClient uses IReflectiveSpotifyClientService to call this method via reflection to set the
     * authorization header of the request.
     * This method is private to simplify the interface for end users.
     */
    private void reflectiveSetAccessToken(String accessToken)
    {
        this.accessToken = accessToken;
        requestBuilder.authorization(this.accessToken);
    }
}