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

import com.sun.jersey.core.header.MediaTypes;
import com.sun.jersey.core.provider.jaxb.AbstractRootElementProvider;
import com.sun.xml.fastinfoset.stax.StAXDocumentParser;
import com.sun.xml.fastinfoset.stax.StAXDocumentSerializer;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.charset.Charset;
import javax.ws.rs.Consumes;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.ext.Providers;
import javax.xml.bind.JAXBException;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.stream.XMLStreamException;
import javax.xml.stream.XMLStreamWriter;

/**
 *
 * @author Paul.Sandoz@Sun.Com
 */
@Produces("application/fastinfoset")
@Consumes("application/fastinfoset")
public final class FastInfosetRootElementProvider extends AbstractRootElementProvider {
        
    public FastInfosetRootElementProvider(@Context Providers ps) {
        super(ps, MediaTypes.FAST_INFOSET);
    }
    
    @Override
    protected final Object readFrom(Class<Object> type, MediaType mediaType,
            Unmarshaller u, InputStream entityStream)
            throws JAXBException {
        final StAXDocumentParser p = new StAXDocumentParser(entityStream);
        if (type.isAnnotationPresent(XmlRootElement.class))
            return u.unmarshal(p);
        else
            return u.unmarshal(p, type).getValue();
    }
    
    @Override
    protected void writeTo(Object t, MediaType mediaType, Charset c,
            Marshaller m, OutputStream entityStream)
            throws JAXBException {
        XMLStreamWriter xsw = new StAXDocumentSerializer(entityStream);
        m.marshal(t, xsw);
        try {
            xsw.flush();
        } catch (XMLStreamException cause) {
            throw new JAXBException(cause);
        }
    }
}
