package org.opendaylight.controller.sal.rest.impl;

import static org.opendaylight.controller.sal.restconf.impl.MediaTypes.API;

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

import javax.ws.rs.Consumes;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.MultivaluedMap;
import javax.ws.rs.core.Response;
import javax.ws.rs.ext.MessageBodyReader;
import javax.ws.rs.ext.Provider;
import javax.xml.stream.XMLStreamException;

import org.opendaylight.controller.sal.rest.api.RestconfService;
import org.opendaylight.yangtools.yang.data.api.CompositeNode;

@Provider
@Consumes({API+RestconfService.XML})
public enum XmlToCompositeNodeProvider implements MessageBodyReader<CompositeNode> {
    INSTANCE;
    
    @Override
    public boolean isReadable(Class<?> type, Type genericType, Annotation[] annotations, MediaType mediaType) {
        return true;
    }

    @Override
    public CompositeNode readFrom(Class<CompositeNode> type, Type genericType, Annotation[] annotations,
            MediaType mediaType, MultivaluedMap<String, String> httpHeaders, InputStream entityStream)
            throws IOException, WebApplicationException {
        XmlReader xmlReader = new XmlReader();
        try {
            return xmlReader.read(entityStream);
        } catch (XMLStreamException | UnsupportedFormatException e) {
            throw new WebApplicationException(Response.status(Response.Status.BAD_REQUEST)
                    .entity(e.getMessage()).build());
        }
    }

}