/*
 * Copyright (c) 2014 Cisco Systems, Inc. and others.  All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
 * and is available at http://www.eclipse.org/legal/epl-v10.html
 */
package org.opendaylight.controller.sal.rest.impl;

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.ext.MessageBodyReader;
import javax.ws.rs.ext.Provider;

import org.opendaylight.controller.sal.rest.api.Draft02;
import org.opendaylight.controller.sal.rest.api.RestconfService;
import org.opendaylight.controller.sal.restconf.impl.RestconfDocumentedException;
import org.opendaylight.controller.sal.restconf.impl.RestconfError.ErrorTag;
import org.opendaylight.controller.sal.restconf.impl.RestconfError.ErrorType;
import org.opendaylight.yangtools.yang.data.api.CompositeNode;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

@Provider
@Consumes({ Draft02.MediaTypes.DATA + RestconfService.JSON, Draft02.MediaTypes.OPERATION + RestconfService.JSON,
        MediaType.APPLICATION_JSON })
public enum JsonToCompositeNodeProvider implements MessageBodyReader<CompositeNode> {
    INSTANCE;

    private final static Logger LOG = LoggerFactory.getLogger( JsonToCompositeNodeProvider.class );

    @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 {
        JsonReader jsonReader = new JsonReader();
        try {
            return jsonReader.read(entityStream);
        } catch (Exception e) {
            LOG.debug( "Error parsing json input", e );
            throw new RestconfDocumentedException(
                            "Error parsing input: " + e.getMessage(),
                            ErrorType.PROTOCOL, ErrorTag.MALFORMED_MESSAGE );
        }
    }

}