package cactusServer.utils;

import java.io.IOException;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;

import javax.ws.rs.Produces;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.ext.MessageBodyWriter;
import javax.ws.rs.ext.Provider;

import net.arnx.jsonic.JSON;

@Provider()
@Produces(MediaType.APPLICATION_JSON)
public class JSONProvider implements MessageBodyWriter<Object> {
    @Override
    public long getSize(Object obj, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
        try {
            return JSON.encode(obj).getBytes("UTF-8").length;
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    @Override
    public boolean isWriteable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
        return true;
    }

    @Override
    public void writeTo(Object obj, Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType, MultivaluedMap<String, Object> httpHeaders, OutputStream entityStream) throws IOException, WebApplicationException {
        JSON.encode(obj, entityStream);
    }
}