Using swagger codegen Java with APIs that require 2- or 3-legged OAuth1

gistfile1.txt

import se.akerfeldt.okhttp.signpost.OkHttpOAuthConsumer;
import se.akerfeldt.okhttp.signpost.SigningInterceptor;

....
        // Using the default Java
        DefaultApi api = new DefaultApi();        
        ApiClient client = api.getApiClient();
        
        // Put the interceptor in the http client
        OkHttpClient http = client.getHttpClient();
        OkHttpOAuthConsumer consumer = new OkHttpOAuthConsumer("yourConsumerKey", "yourConsumerSecret");
        consumer.setTokenWithSecret("yourAccessToken", "yourAccessSecret"); //comment out for 2-legged
        http.interceptors().add(new SigningInterceptor(consumer));
        
        // Call your API
        api.someMethod(); 

....
        // Or if you're using Retrofit
        OkHttpOAuthConsumer consumer = new OkHttpOAuthConsumer("yourConsumerKey", "yourConsumerSecret");
        consumer.setTokenWithSecret("yourAccessToken", "yourAccessSecret"); //comment out for 2-legged
        OkHttpClient client = new OkHttpClient.Builder()
          .addInterceptor(new SigningInterceptor(consumer))
          .build();

        // Build Retrofit with the custom client
        Retrofit retrofit =  new Retrofit.Builder()
        ...
          .client(client)
          .build();

        // Create your API and call it
        DefaultApi api = retrofit.create(DefaultApi.class);
        Response<SomeObject> obj = api.someMethod().execute();

gistfile2.txt

    <!-- Add this to your pom.xml dependencies -->
    <dependency>
      <groupId>se.akerfeldt</groupId>
      <artifactId>okhttp-signpost</artifactId>
      <version>1.0.0</version> <!-- 1.0.0 for compatibility with OkHttp2/Retrofit, 1.1.0 for OkHttp3/Retrofit2 -->
    </dependency> 

gistfile3.txt

This is a way to use Swagger (1.2 and 2.0) Java generated code with APIs that require 2- or 3-legged OAuth1. 

This only works with the default Java and Retrofit codegen (not any of the jax or jersey or feign or etc.).

Make sure to leave securityDefinitions and security out of your swagger IDL, as it will conflict with the 
interceptor you are putting in the OkHttpClient.