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package com.sun.jersey.json.impl.provider.entity;


import com.sun.jersey.json.impl.ImplMessages;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import javax.ws.rs.Consumes;
import javax.ws.rs.Produces;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import org.codehaus.jettison.json.JSONException;
import org.codehaus.jettison.json.JSONObject;

/**
 *
 * @author japod
 */
public class JSONObjectProvider extends JSONLowLevelProvider<JSONObject>{

    @Produces("application/json")
    @Consumes("application/json")
    public static final class App extends JSONObjectProvider {
    }

    @Produces("*/*")
    @Consumes("*/*")
    public static final class General extends JSONObjectProvider {
        @Override
        protected boolean isSupported(MediaType m) {
            return m.getSubtype().endsWith("+json");
        }
    }

    JSONObjectProvider() {
        super(JSONObject.class);
    }

    public JSONObject readFrom(
            Class<JSONObject> type, 
            Type genericType, 
            Annotation annotations[],
            MediaType mediaType, 
            MultivaluedMap<String, String> httpHeaders, 
            InputStream entityStream) throws IOException {
        try {
            return new JSONObject(readFromAsString(entityStream, mediaType));
        } catch (JSONException je) {
            throw new WebApplicationException(
                    new Exception(ImplMessages.ERROR_PARSING_JSON_OBJECT(), je),
                    400);
        }
    }
    
    public void writeTo(
            JSONObject t, 
            Class<?> type, 
            Type genericType, 
            Annotation annotations[], 
            MediaType mediaType, 
            MultivaluedMap<String, Object> httpHeaders,
            OutputStream entityStream) throws IOException {
        try {
            OutputStreamWriter writer = new OutputStreamWriter(entityStream, 
                    getCharset(mediaType));
            t.write(writer);
            writer.flush();
        } catch (JSONException je) {
            throw new WebApplicationException(
                    new Exception(ImplMessages.ERROR_WRITING_JSON_OBJECT(), je),
                    500);
        }
    }
}
