Swagger CodeGen

Swagger CodeGen is a tool that allows you to generate a client in a variety of programming languages. You can download Swagger CodeGen here.

To see available programming languages enter the following command:

java -jar swagger-codegen-cli.jar langs

Use the following command to further see available options for Java :

java -jar swagger-codegen-cli.jar config-help -l java

Example: Generating a client for Java 

java -jar swagger-codegen-cli.jar generate -i https://dracoon.team/api/spec_v4/ -o Dracoon --artifact-id dracoon-swagger --group-id com.dracoon -l java --library retrofit2

When finished, Swagger CodeGen has generated a full REST client a maven project that you can use the following way: 

import java.io.IOException;

import io.swagger.client.ApiClient;
import io.swagger.client.api.AuthApi;
import io.swagger.client.api.NodesApi;
import io.swagger.client.model.LoginRequest;
import io.swagger.client.model.LoginResponse;
import io.swagger.client.model.NodeList;
import retrofit2.Call;
import retrofit2.Response;

public class Main {
	public static void main(String[] args) throws IOException {
		// get client instace
		ApiClient client = new ApiClient();
		AuthApi authApi = client.createService(AuthApi.class);

		// login
		LoginRequest loginRequest = new LoginRequest();
		loginRequest.setLogin("MY_USERNAME");
		loginRequest.setPassword("MY_PASSWORD");		
		Call loginCall = authApi.login(loginRequest);
		Response response = loginCall.execute();

		if(response.isSuccessful()){
			// print auth token
			String token = response.body().getToken();
			System.out.println(token);	
		}
	}
}