package org.ntlab.SproutServer.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 {
    @Override
    public long getSize(Object arg0, Class arg1, Type arg2, Annotation[] arg3, MediaType arg4) {
        try {
            return JSON.encode(arg0).getBytes("UTF-8").length;
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

    @Override
    public boolean isWriteable(Class arg0, Type arg1, Annotation[] arg2, MediaType arg3) {
        return true;
    }

    @Override
    public void writeTo(Object arg0, Class arg1, Type arg2, Annotation[] arg3, MediaType arg4, MultivaluedMap arg5, OutputStream arg6) throws IOException, WebApplicationException {
        JSON.encode(arg0, arg6);
    }
}