JsonRpcDemo.java

import com.google.gson.Gson;

import java.lang.reflect.Proxy;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * Created by hackeris on 16/9/16.
 */
public class JsonConvert {

    private class SomeClass {
        String someProperty;
    }

    interface SomeInterface {
        SomeClass getAnObject();

        List<SomeClass> getSomeObjects();
    }

    private static class RpcDemo {
        private static Map<String, String> jsonPool = makeJsonPool();

        private static Map<String, String> makeJsonPool() {
            Map<String, String> pool = new HashMap<>();
            pool.put("getAnObject", "{\"someProperty\":\"Some Value\"}");
            pool.put("getSomeObjects", "[{\"someProperty\":\"Some Value 1\"},{\"someProperty\":\"Some Value 2\"}]");
            return pool;
        }

        static <Interface> Interface refer(final Class<Interface> interfaceClass) {
            return (Interface) Proxy.newProxyInstance(interfaceClass.getClassLoader(), new Class<?>[]{interfaceClass}, ((proxy, method, args) -> {

                String responseJson = jsonPool.get(method.getName());
                return new Gson().fromJson(responseJson, method.getReturnType());
            }));
        }
    }

    public static void main(String[] args) {

        SomeInterface service = RpcDemo.refer(SomeInterface.class);
        SomeClass anObject = service.getAnObject();
        System.out.println(anObject.someProperty);
        List<SomeClass> someObjects = service.getSomeObjects();
        System.out.println(someObjects.get(0).someProperty);
    }

}