/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * Copyright (c) 2013 Oracle and/or its affiliates. All rights reserved.
 *
 * The contents of this file are subject to the terms of either the GNU
 * General Public License Version 2 only ("GPL") or the Common Development
 * and Distribution License("CDDL") (collectively, the "License").  You
 * may not use this file except in compliance with the License.  You can
 * obtain a copy of the License at
 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
 * or packager/legal/LICENSE.txt.  See the License for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing the software, include this License Header Notice in each
 * file and include the License file at packager/legal/LICENSE.txt.
 *
 * GPL Classpath Exception:
 * Oracle designates this particular file as subject to the "Classpath"
 * exception as provided by Oracle in the GPL Version 2 section of the License
 * file that accompanied this code.
 *
 * Modifications:
 * If applicable, add the following below the License Header, with the fields
 * enclosed by brackets [] replaced by your own identifying information:
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 * If you wish your version of this file to be governed by only the CDDL or
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 * elects to include this software in this distribution under the [CDDL or GPL
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 */

package org.glassfish.movieplex7.json;

import java.io.IOException;
import java.io.OutputStream;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import javax.json.Json;
import javax.json.stream.JsonGenerator;
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 org.glassfish.movieplex7.entities.Movie;

/**
 * @author Arun Gupta
 */
@Provider
@Produces(MediaType.APPLICATION_JSON)
public class MovieWriter implements MessageBodyWriter<Movie> {

    @Override
    public boolean isWriteable(Class<?> type, Type type1, Annotation[] antns, MediaType mt) {
        return Movie.class.isAssignableFrom(type);
    }

    @Override
    public long getSize(Movie t, Class<?> type, Type type1, Annotation[] antns, MediaType mt) {
        // As of JAX-RS 2.0, the method has been deprecated and the 
        // value returned by the method is ignored by a JAX-RS runtime. 
        // All MessageBodyWriter implementations are advised to return -1 from 
        // the method.
        
        return -1;
    }

    @Override
    public void writeTo(Movie t, Class<?> type, Type type1, Annotation[] antns, MediaType mt, MultivaluedMap<String, Object> mm, OutputStream out) throws IOException, WebApplicationException {
        JsonGenerator gen = Json.createGenerator(out);
        gen.writeStartObject()
                .write("id", t.getId())
                .write("name", t.getName())
                .write("actors", t.getActors())
                .writeEnd();
        gen.flush();

    }

}
