//package org.gcube.datatransfer.resolver.services;
//
//import javax.enterprise.context.RequestScoped;
//import javax.servlet.http.HttpServletRequest;
//import javax.ws.rs.HEAD;
//import javax.ws.rs.Path;
//import javax.ws.rs.PathParam;
//import javax.ws.rs.WebApplicationException;
//import javax.ws.rs.core.Context;
//import javax.ws.rs.core.Response;
//import javax.ws.rs.core.Response.ResponseBuilder;
//
//import org.gcube.common.storagehub.client.StreamDescriptor;
//import org.gcube.common.storagehub.client.plugins.AbstractPlugin;
//import org.gcube.common.storagehub.client.proxies.ItemManagerClient;
//import org.gcube.datatransfer.resolver.services.error.ExceptionManager;
//import org.gcube.datatransfer.resolver.util.StorageHubMetadataResponseBuilder;
//import org.slf4j.Logger;
//import org.slf4j.LoggerFactory;
//
///**
// * The Class StorageHubResolver.
// *
// * @author Francesco Mangiacrapa at ISTI-CNR (francesco.mangiacrapa@isti.cnr.it)
// * Dec 14, 2018
// */
//@Path("shub/metadata/{id}")
//public class StorageHubResolverGetMetadata {
//
//	private ItemManagerClient client = AbstractPlugin.item().build();
//
//	public static final String STORAGE_HUB_ID = "id";
//
//	private static Logger logger = LoggerFactory.getLogger(StorageHubResolverGetMetadata.class);
//
//	private String help = "https://wiki.gcube-system.org/gcube/URI_Resolver#STORAGE-HUB_Resolver";
//
//	@RequestScoped
//	@PathParam(STORAGE_HUB_ID)
//	String id;
//
//
//	/**
//	 * Gets the metadata.
//	 *
//	 * @param req the req
//	 * @return the metadata
//	 */
//	@HEAD
//	@Path("")
//	public Response getMetadata(@Context HttpServletRequest req) {
//		logger.info(this.getClass().getSimpleName()+" HEAD getMetadata called");
//
//		try{
//
//			//Checking mandatory parameter id
//			if(id==null || id.isEmpty()){
//				logger.error("Path Parameter "+STORAGE_HUB_ID+" not found");
//				throw ExceptionManager.badRequestException(req, "Missing mandatory path parameter "+STORAGE_HUB_ID, StorageHubResolverGetMetadata.class, help);
//			}
//
//			try{
//				StreamDescriptor descriptor = client.resolvePublicLink(id);
//				ResponseBuilder response = Response
//						.noContent();
//
//				response = new StorageHubMetadataResponseBuilder(req, response).fillMetadata(descriptor, id);
//				return response.build();
//
//			}catch(Exception e){
//				logger.error("Error on getting file with "+id, e);
//				String errorMsg =  "Error on getting file with hub id '"+id+"'. "+e.getMessage();
//				throw ExceptionManager.internalErrorException(req, errorMsg, StorageHubResolverGetMetadata.class, help);
//			}
//
//		}catch (Exception e) {
//
//			if(!(e instanceof WebApplicationException)){
//				//UNEXPECTED EXCEPTION managing it as WebApplicationException
//				String error = "Error occurred on resolving the StorageHub URL with id: "+id+". Please, contact the support!";
//				throw ExceptionManager.internalErrorException(req, error, this.getClass(), help);
//			}
//			//ALREADY MANAGED as WebApplicationException
//			logger.error("Exception:", e);
//			throw (WebApplicationException) e;
//		}
//	}
//}