Feature/java native codegen

[virenderm01]

Pure Java code generator for issue #155 Issue

The code generator creates snippet in java 8, no other dependencies are required to run the code.

Changes:
Added new code gen with name java-native. All the changes required to generate the code is added under the folder codegen/java-native
The code structure and style is similar to java-okhttp codegen.

Sample Code Snippet

import java.io.*;
import javax.net.ssl.HttpsURLConnection;
import java.net.*;
import java.lang.reflect.*;
import java.util.*;
import java.util.function.BiConsumer;
public class main {
   public static void main(String []args) throws IOException{
      URL obj = new URL("https://postman-echo.com/get");
      URLConnection connection = obj.openConnection();
      HttpURLConnection con = (HttpURLConnection) connection;
      con.setRequestMethod("GET");
      Map<String, String> headers = new HashMap<>();
      BiConsumer<String,String> headerMap = (key,value) -> {
         if(headers.get(key)!=null){
            String val = headers.get(key);
            val = val + ", "+ value;
            headers.put(key, val);
         }else{
            headers.put(key,value) ;
         }
      };
      headerMap.accept("key", "value1");
      headerMap.accept("key", "value2");
      for (Map.Entry<String, String> entry : headers.entrySet()) {
         con.setRequestProperty(entry.getKey(), entry.getValue());
      }con.setRequestProperty("Accept","application/json");
      con.setDoOutput(false);
      BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
      String temp = null;
      StringBuilder response = new StringBuilder();
      while ((temp = in.readLine()) != null) {
         response.append(temp).append(" ");
      }
      System.out.println(response.toString());
      in.close();
   
}
}

Test Configuration
Unit Tests and newman test are all passing, the log for the same can be found in the below link.
Overall Code coverage is above 85% for tests.
Java native code logs are from line 5246
Travis Build Logs

[virenderm01]

Hi @shreys7 ,
Can you review it once, I see it's been more than a month but no action was taken on this.
I have added all the necessary test cases, please let me know if anything else is required.

[danthe1st]

By the way,

if(connection instanceof HttpsURLConnection){
    con = (HttpsURLConnection) connection;
}else{
    con = (HttpURLConnection) connection;
}

cab be simplified to con = (HttpURLConnection) connection; as HttpsURLConnection extends HttpsURLConnection.

[virenderm01]

@danthe1st
you meant

HttpURLConnection con = (HttpsURLConnection) connection;

I have created another branch and have made the changes. Let me know if I had misinterpreted your comment.

[danthe1st]

You can just cast to HttpURLConnection, even if it is a HttpsURLConnection. You therefore don't need the if.

If you cast a HttpUrlConnection to a HttpsURLConnection, it will not work.

[virenderm01]

Hi @umeshp7 @shreys7 ,
Can you guys please review this, let me know if there are any changes required or if there are any issues that might have been missed out while creating the pull request.

Regards,
Virender Moudgil

[doej1367]

i'd really like to see this - can we all have a status uptade on this?

[dhwaneetbhatt]

Thanks for the contribution @virenderm01. Could you please pull the latest changes from upstream so we can start the review process?

[virenderm01]

@dhwaneetbhatt updated the branch, the confilicts are now resolved.

[virenderm01]

@dhwaneetbhatt any update on merging this ?

[dhwaneetbhatt]

@virenderm01 I'm no longer a maintainer of this repository. Please reach out to Postman Support. They should be able to help you.