Convert Python dict to Map from python_server_entry_point

[texervn]

Hello!
This is not a bug, but I would like to ask a question on how to convert dictionary to JavaMap more efficient. I can achieve the goal by creating a new instance of JavaGateway and use its _gateway_client for MapConverter.

What I want is that we convert result to JavaMap object without using JavaGateway. Is there any way to only use _gateway_client directly from the ClientServer below?

I really appreciate your help.

Here is my code:

hello.py

from py4j.clientserver import ClientServer, JavaParameters, PythonParameters
from py4j.java_collections import MapConverter
from py4j.java_collections import JavaMap
from py4j.java_gateway import  JavaGateway, GatewayParameters

class SimpleHello(object):
    @staticmethod
    def sayHello(service: str, params: JavaMap) -> JavaMap:
        gateway = JavaGateway(
            gateway_parameters=GatewayParameters(auto_convert=True)
        )
        result = {"a": "b", "c": 1, "d": [1, 2, 3], "e": [{"x": "y"}]}
        result_map = MapConverter().convert(result, gateway._gateway_client)

        return result_map

    class Java:
        implements = ["com.hello.IHello"]

simple_hello = SimpleHello()
ClientServer(
    java_parameters=JavaParameters(auto_convert=True),
    python_parameters=PythonParameters(),
    python_server_entry_point=simple_hello
)

IHello.java

package com.hello;

import java.util.Map;

public interface IHello {
    public Map<String, Object> sayHello(
        String service,
        Map<String, Object> params
    );
}

SingleThreadClientApplication.java

package com.hello;

import java.util.Map;

import org.json.JSONObject;

import py4j.ClientServer;

public class Main {

    public static void main(String[] args) {
        ClientServer clientServer = new ClientServer(null);

        IHello hello = (IHello) clientServer.getPythonServerEntryPoint(new Class[] { IHello.class });
        
		JSONObject jsonObject = new JSONObject();
		jsonObject.put("name", "John");
		jsonObject.put("age", 30);
		
		JSONObject small = new JSONObject();
		small.put("color", "Blue");
		small.put("size", "Big");
		
		jsonObject.put("config", small);
		
		 Map<String, Object> paramsMap = jsonObject.toMap();

        System.out.println(hello.sayHello("service", paramsMap));
        clientServer.shutdown();
    }
}

[Fisnake]

i just wondering how to use params: JavaMap, which is not used in your hello.py demo ? thanks a lot

[texervn]

Oh, I see. There is actually a function that takes JavaMap params and returns the result.
For example:
result = my_function(params)

For the simplicity, I assigned the result directly.

Thanks.