FormUrlEncodedRequest.java

package retrofit.labs;

import com.squareup.okhttp.RequestBody;

import java.util.Map;

public abstract class FormUrlEncodedRequest<T> extends Request<T> {

  public FormUrlEncodedRequest(Listener<T> listener) {
    super(listener);
  }

  public abstract Map<String, RequestBody> fields();
}

GitHubRequest.java

package com.example.retrofit.labs;

import com.example.retrofit.Contributor;

import java.util.List;

import retrofit.labs.SimpleRequest;

public class GitHubRequest extends SimpleRequest<List<Contributor>> {

  private final String owner;
  private final String repo;

  public GitHubRequest(String owner, String repo, Listener<List<Contributor>> listener) {
    super(listener);
    this.owner = owner;
    this.repo = repo;
  }

  @Override public String path() {
    return String.format("/repos/%s/%s/contributors", owner, repo);
  }

  @Override public Method method() {
    return Method.GET;
  }
}

GitHubRequestTest.java

package com.example.retrofit.labs;

import com.example.retrofit.Contributor;

import java.util.List;

import retrofit.RestAdapter;
import retrofit.labs.Request;

public class GitHubRequestTest {

  private static final String API_URL = "https://api.github.com";

  public static void main(String... args) {
    // Create a very simple REST adapter which points the GitHub API endpoint.
    RestAdapter restAdapter = new RestAdapter.Builder()
        .endpoint(API_URL)
        .build();

    // Create an instance of our GitHub API interface.
    Request.Listener<List<Contributor>> listener = new Request.Listener<List<Contributor>>() {
      @Override public void onSuccess(List<Contributor> contributors) {
        // Fetch and print a list of the contributors to this library.
        for (Contributor contributor : contributors) {
          System.out.println(contributor.login + " (" + contributor.contributions + ")");
        }
      }

      @Override public void onError(Exception e) {

      }
    };
    GitHubRequest request = new GitHubRequest("square", "retrofit", listener);
    restAdapter.create(request);
  }
}

MultipartRequest.java

package retrofit.labs;

import com.squareup.okhttp.RequestBody;

import java.util.Map;

public abstract class MultipartRequest<T> extends Request<T> {

  public MultipartRequest(Listener<T> listener) {
    super(listener);
  }

  public abstract Map<String, RequestBody> parts();
}

Request.java

package retrofit.labs;

import com.squareup.okhttp.RequestBody;

import java.util.Collections;
import java.util.Map;

public abstract class Request<T> {

  public enum Method {
    GET, POST, PUT, PATCH, HEAD
  }

  public interface Listener<T> {
    void onSuccess(T response);
    void onError(Exception e);
  }

  private Listener<T> listener;

  public Request(Listener<T> listener) {
    this.listener = listener;
  }

  public abstract String path();

  public abstract Request.Method method();

  public RequestBody body() {
    return null;
  }

  public Map<String, String> queryParams() {
    return Collections.emptyMap();
  }

  public Map<String, String> headers() {
    return Collections.emptyMap();
  }
}

SimpleRequest.java

package retrofit.labs;

public abstract class SimpleRequest<T> extends Request<T> {

  public SimpleRequest(Listener<T> listener) {
    super(listener);
  }
}